:root {
  --color-background: #f4f8f3;
  --color-surface: #ffffff;
  --color-surface-soft: #edf7ef;

  --color-text: #16362d;
  --color-text-soft: #68756f;

  --color-primary: #127a58;
  --color-primary-dark: #0d5c43;
  --color-primary-light: #dff3e7;

  --color-accent: #f2c66d;
  --color-accent-soft: #fff6df;

  --color-border: #dce7df;
  --color-error: #b64d4d;
  --color-error-soft: #fff1f1;

  --color-success: #168356;
  --color-success-soft: #e9f8ef;

  --shadow-small: 0 10px 24px rgba(22, 54, 45, 0.08);
  --shadow-medium: 0 18px 45px rgba(22, 54, 45, 0.12);
  --shadow-large: 0 30px 80px rgba(22, 54, 45, 0.18);

  --radius-small: 12px;
  --radius-medium: 18px;
  --radius-large: 28px;
  --radius-extra-large: 38px;

  --transition: 0.25s ease;
}


/* ========================================
   ОСНОВНИ НАСТРОЙКИ
======================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;

  background:
    radial-gradient(
      circle at 12% 8%,
      rgba(174, 227, 190, 0.3),
      transparent 28%
    ),
    linear-gradient(
      180deg,
      #f8fbf7 0%,
      var(--color-background) 100%
    );

  color: var(--color-text);

  font-family:
    Inter,
    "Segoe UI",
    Arial,
    sans-serif;

  line-height: 1.5;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}


/* ========================================
   ГОРНО МЕНЮ
======================================== */

.lesson-header {
  position: sticky;
  top: 0;
  z-index: 100;

  min-height: 76px;
  padding: 12px clamp(18px, 4vw, 62px);

  display: grid;
  grid-template-columns:
    minmax(180px, 1fr)
    minmax(260px, 430px)
    minmax(180px, 1fr);

  align-items: center;
  gap: 24px;

  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(220, 231, 223, 0.95);

  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.lesson-logo {
  width: fit-content;

  display: inline-flex;
  align-items: center;
  gap: 12px;

  color: var(--color-text);
  text-decoration: none;

  font-size: 1.08rem;
  font-weight: 800;
}

.lesson-logo img {
  width: 44px;
  height: 44px;

  object-fit: contain;

  border-radius: 12px;
}

.lesson-progress-wrapper {
  display: grid;
  gap: 7px;
}

.lesson-progress-info {
  display: flex;
  justify-content: space-between;
  gap: 18px;

  color: var(--color-text-soft);

  font-size: 0.8rem;
  font-weight: 700;
}

.lesson-progress-track {
  width: 100%;
  height: 8px;

  overflow: hidden;

  border-radius: 999px;
  background: #e8efea;
}

.lesson-progress-bar {
  width: 20%;
  height: 100%;

  border-radius: inherit;

  background:
    linear-gradient(
      90deg,
      var(--color-primary),
      #4fb889
    );

  transition: width 0.35s ease;
}

.header-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
}

.header-button,
.back-button {
  min-height: 42px;
  padding: 0 15px;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  border-radius: 12px;

  font-size: 0.9rem;
  font-weight: 800;

  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition);
}

.header-button {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.back-button {
  border: 1px solid transparent;
  background: var(--color-primary);
  color: white;
  text-decoration: none;
}

.header-button:hover,
.back-button:hover {
  transform: translateY(-1px);
}

.header-button:hover {
  border-color: #a9c7b6;
  background: #f8fbf9;
}

.back-button:hover {
  background: var(--color-primary-dark);
}


/* ========================================
   ОСНОВНО СЪДЪРЖАНИЕ
======================================== */

main {
  width: min(1480px, 100%);
  margin: 0 auto;
}


/* ========================================
   HERO СЕКЦИЯ
======================================== */

.mission-hero {
  min-height: 650px;
  padding:
    clamp(58px, 8vw, 112px)
    clamp(22px, 6vw, 88px);

  display: grid;
  grid-template-columns:
    minmax(0, 1.06fr)
    minmax(380px, 0.94fr);

  align-items: center;
  gap: clamp(42px, 7vw, 110px);
}

.mission-hero-content {
  position: relative;
  z-index: 2;
}

.mission-label,
.screen-label {
  margin: 0 0 12px;

  color: var(--color-primary);

  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.mission-hero h1 {
  max-width: 820px;
  margin: 0;

  font-size: clamp(3.2rem, 6vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: -0.065em;
}

.mission-hero h1 span {
  color: var(--color-primary);
}

.mission-introduction {
  max-width: 720px;
  margin: 28px 0 0;

  color: var(--color-text-soft);

  font-size: clamp(1.05rem, 1.45vw, 1.28rem);
}

.mission-buttons {
  margin-top: 34px;

  display: flex;
  align-items: center;
  gap: 12px;
}

.primary-button,
.secondary-button {
  min-height: 50px;
  padding: 0 21px;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  border-radius: 13px;

  font-weight: 800;

  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.primary-button {
  border: 1px solid transparent;

  background: var(--color-primary);
  color: white;

  box-shadow:
    0 12px 28px
    rgba(18, 122, 88, 0.2);
}

.primary-button:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
}

.primary-button:disabled {
  cursor: not-allowed;

  opacity: 0.45;
  transform: none;
  box-shadow: none;
}

.secondary-button {
  border: 1px solid var(--color-border);

  background: var(--color-surface);
  color: var(--color-text);
}

.secondary-button:hover {
  border-color: #aac8b7;
  background: #f8fbf9;
  transform: translateY(-2px);
}

.mission-information {
  margin-top: 36px;

  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.information-card {
  min-width: 135px;
  padding: 15px 17px;

  display: grid;
  gap: 2px;

  border: 1px solid var(--color-border);
  border-radius: 16px;

  background: rgba(255, 255, 255, 0.78);
}

.information-card strong {
  font-size: 1.35rem;
}

.information-card span {
  color: var(--color-text-soft);

  font-size: 0.8rem;
}


/* ========================================
   ВИЗУАЛИЗАЦИЯ НА ПАРКА
======================================== */

.mission-hero-visual {
  position: relative;

  min-height: 490px;

  display: grid;
  place-items: center;
}

.park-illustration {
  position: relative;

  width: 100%;
  min-height: 490px;

  display: grid;
  place-items: center;
}

.park-sun {
  position: absolute;
  top: 6px;
  right: 10%;

  width: 80px;
  height: 80px;

  border-radius: 50%;

  background: #ffd676;

  box-shadow:
    0 0 0 16px
    rgba(255, 214, 118, 0.18);
}

.park-cloud {
  position: absolute;

  width: 108px;
  height: 36px;

  border-radius: 50px;

  background: rgba(255, 255, 255, 0.95);

  box-shadow: 0 10px 30px rgba(63, 105, 87, 0.08);
}

.park-cloud::before,
.park-cloud::after {
  content: "";

  position: absolute;
  bottom: 0;

  border-radius: 50%;

  background: inherit;
}

.park-cloud::before {
  left: 18px;

  width: 48px;
  height: 48px;
}

.park-cloud::after {
  right: 16px;

  width: 37px;
  height: 37px;
}

.park-cloud-one {
  top: 52px;
  left: 1%;
}

.park-cloud-two {
  top: 132px;
  right: -2%;

  transform: scale(0.72);
}

.park-map {
  position: relative;

  width: min(485px, 88vw);
  aspect-ratio: 1 / 1;

  overflow: hidden;

  border: 14px solid white;
  border-radius: var(--radius-extra-large);

  background:
    linear-gradient(
      90deg,
      transparent 49%,
      rgba(255, 255, 255, 0.82) 49% 53%,
      transparent 53%
    ),
    linear-gradient(
      transparent 49%,
      rgba(255, 255, 255, 0.82) 49% 53%,
      transparent 53%
    ),
    #9fd377;

  box-shadow: var(--shadow-large);

  transform: rotate(2deg);
}

.park-path {
  position: absolute;
  z-index: 1;

  background: #eedfc7;
}

.park-path-vertical {
  left: 45%;
  top: 0;

  width: 10%;
  height: 100%;
}

.park-path-horizontal {
  left: 0;
  top: 47%;

  width: 100%;
  height: 10%;
}

.park-lake,
.park-playground,
.park-flower-zone,
.park-rest-zone {
  position: absolute;
  z-index: 2;

  display: grid;
  place-items: center;

  color: white;

  font-weight: 900;
  text-align: center;

  box-shadow:
    inset 0 0 0 4px
    rgba(255, 255, 255, 0.26);
}

.park-lake {
  left: 8%;
  top: 10%;

  width: 31%;
  aspect-ratio: 1;

  border: 9px solid #c6d2c2;
  border-radius: 50%;

  background:
    radial-gradient(
      circle at 35% 30%,
      #8fd7f5,
      #61b9e5 55%,
      #4ca5d0
    );
}

.park-lake span {
  padding: 6px 9px;

  border-radius: 999px;

  background: rgba(38, 106, 145, 0.62);
}

.park-playground {
  right: 10%;
  top: 10%;

  width: 30%;
  height: 31%;

  clip-path:
    polygon(
      50% 0,
      100% 38%,
      82% 100%,
      18% 100%,
      0 38%
    );

  background:
    linear-gradient(
      145deg,
      #f7dc82,
      #eabf4a
    );

  color: #8b5c15;
}

.park-flower-zone {
  left: 31%;
  bottom: 8%;

  width: 32%;
  height: 24%;

  clip-path:
    polygon(
      50% 0,
      100% 100%,
      0 100%
    );

  background:
    linear-gradient(
      145deg,
      #f2a5a5,
      #e97c8c
    );
}

.park-rest-zone {
  right: 9%;
  bottom: 16%;

  width: 29%;
  height: 25%;

  clip-path:
    polygon(
      25% 7%,
      75% 7%,
      100% 50%,
      75% 93%,
      25% 93%,
      0 50%
    );

  background:
    linear-gradient(
      145deg,
      #c4a6e1,
      #a681cb
    );
}

.park-tree {
  position: absolute;
  z-index: 4;

  color: #247347;

  font-size: 2.7rem;

  text-shadow:
    0 3px 0
    rgba(255, 255, 255, 0.45);
}

.tree-one {
  left: 7%;
  bottom: 8%;
}

.tree-two {
  left: 19%;
  top: 42%;
}

.tree-three {
  right: 7%;
  top: 45%;
}

.tree-four {
  right: 30%;
  bottom: 5%;
}

.tree-five {
  left: 4%;
  top: 4%;
}


/* ========================================
   РАБОТНА ЗОНА
======================================== */

.mission-workspace {
  margin:
    0
    clamp(16px, 4vw, 54px)
    90px;

  display: grid;
  grid-template-columns:
    280px
    minmax(0, 1fr);

  gap: 24px;
  align-items: start;
}

.mission-sidebar,
.mission-panel {
  border: 1px solid var(--color-border);

  background: var(--color-surface);

  box-shadow: var(--shadow-medium);
}

.mission-sidebar {
  position: sticky;
  top: 100px;

  padding: 14px;

  display: grid;
  gap: 8px;

  border-radius: 22px;
}

.mission-step {
  width: 100%;
  padding: 12px;

  display: grid;
  grid-template-columns: 40px 1fr;
  align-items: center;
  gap: 12px;

  border: 0;
  border-radius: 14px;

  background: transparent;
  color: var(--color-text-soft);

  text-align: left;

  transition:
    background var(--transition),
    transform var(--transition);
}

.mission-step:hover {
  background: #f7faf8;
}

.mission-step.active {
  background: var(--color-surface-soft);
}

.step-number {
  width: 36px;
  height: 36px;

  display: grid;
  place-items: center;

  border-radius: 50%;

  background: #edf3ef;
  color: var(--color-text);

  font-weight: 900;

  transition:
    background var(--transition),
    color var(--transition);
}

.mission-step.active .step-number {
  background: var(--color-primary);
  color: white;
}

.step-content {
  display: grid;
}

.step-content strong {
  color: var(--color-text);
}

.step-content small {
  margin-top: 2px;

  color: var(--color-text-soft);
}

.mission-panel {
  min-height: 650px;

  overflow: hidden;

  border-radius: var(--radius-large);
}

.mission-screen {
  display: none;

  padding:
    clamp(26px, 4vw, 56px);

  animation: screenAppears 0.35s ease;
}

.mission-screen.active {
  display: block;
}

@keyframes screenAppears {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.screen-heading {
  margin-bottom: 28px;
}

.screen-heading h2,
#teacher-dialog h2 {
  margin: 0;

  font-size: clamp(2.05rem, 4vw, 3.5rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.screen-heading > p:not(.screen-label) {
  max-width: 760px;
  margin-bottom: 0;

  color: var(--color-text-soft);
}


/* ========================================
   СТЪПКА 1
======================================== */

.mission-brief,
.goal-card,
.team-card,
.geometry-card,
.mathematics-form,
.challenge-information,
.challenge-answer,
.project-summary,
.assessment-rubric {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);

  background: var(--color-surface);
}

.mission-brief {
  padding: 24px;

  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 18px;

  background:
    linear-gradient(
      135deg,
      #edf8f0,
      #fff9ea
    );
}

.brief-icon {
  width: 62px;
  height: 62px;

  display: grid;
  place-items: center;

  border-radius: 18px;

  background: white;

  font-size: 1.9rem;

  box-shadow: var(--shadow-small);
}

.brief-label {
  margin: 0;

  color: var(--color-primary);

  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brief-content h3 {
  margin:
    4px
    0
    8px;

  font-size: 1.35rem;
}

.brief-content p:last-child {
  margin-bottom: 0;

  color: var(--color-text-soft);
}

.mission-goals {
  margin-top: 18px;

  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.goal-card {
  padding: 21px;
}

.goal-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 20px;

  display: grid;
  place-items: center;

  border-radius: 13px;

  background: var(--color-primary-light);
  color: var(--color-primary);

  font-size: 1.35rem;
  font-weight: 900;
}

.goal-card h3 {
  margin: 0;
}

.goal-card p {
  margin:
    8px
    0
    0;

  color: var(--color-text-soft);
}


/* ========================================
   СТЪПКА 2 – ЕКИПИ
======================================== */

.teams-grid {
  display: grid;
  grid-template-columns:
    repeat(3, minmax(0, 1fr));

  gap: 15px;
}

.team-card {
  position: relative;

  padding: 20px;

  color: var(--color-text);
  text-align: left;

  transition:
    border-color var(--transition),
    background var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.team-card:hover {
  transform: translateY(-4px);

  border-color: #a8c9b6;

  box-shadow:
    0 15px 32px
    rgba(30, 75, 58, 0.1);
}

.team-card.selected {
  border: 2px solid var(--color-primary);

  background: var(--color-surface-soft);
}

.team-card-icon {
  margin-bottom: 14px;

  font-size: 2.15rem;
}

.team-zone {
  display: inline-block;
  margin-bottom: 7px;

  color: var(--color-primary);

  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.team-card h3 {
  margin: 0;

  font-size: 1.08rem;
}

.team-card p {
  margin:
    8px
    0
    0;

  color: var(--color-text-soft);
}


/* ========================================
   СТЪПКА 3 – МАТЕМАТИКА
======================================== */

.task-layout {
  display: grid;
  grid-template-columns:
    minmax(285px, 0.8fr)
    minmax(0, 1.2fr);

  gap: 18px;
}

.geometry-card {
  padding: 24px;

  display: flex;
  align-items: flex-start;
  gap: 18px;

  background: var(--color-surface-soft);
}

.geometry-icon {
  flex: 0 0 76px;

  width: 76px;
  height: 76px;

  display: grid;
  place-items: center;

  border-radius: 22px;

  background: white;
  color: var(--color-primary);

  font-size: 2.8rem;
  font-weight: 900;

  box-shadow: var(--shadow-small);
}

.small-label {
  color: var(--color-text-soft);

  font-size: 0.78rem;
  font-weight: 800;
}

.geometry-content h3 {
  margin:
    4px
    0
    0;

  font-size: 1.3rem;
}

.geometry-content ul {
  margin:
    15px
    0
    0;

  padding-left: 19px;

  color: var(--color-text-soft);
}

.mathematics-form {
  padding: 24px;

  display: grid;
  gap: 15px;
}

.mathematics-question {
  display: grid;
  gap: 8px;
}

.mathematics-question label {
  color: var(--color-text);

  font-weight: 800;
}

.answer-input-wrapper {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 9px;
}

.answer-input-wrapper input {
  width: 100%;
  padding: 13px 14px;

  border: 1px solid var(--color-border);
  border-radius: 12px;

  background: white;
  color: var(--color-text);

  outline: none;

  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
}

.answer-input-wrapper input:focus {
  border-color: var(--color-primary);

  box-shadow:
    0 0 0 4px
    rgba(18, 122, 88, 0.1);
}

.answer-input-wrapper span {
  color: var(--color-text-soft);
}

.answer-feedback {
  margin-top: 16px;
  padding: 16px 18px;

  border-radius: 14px;

  font-weight: 800;
}

.answer-feedback.success {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.answer-feedback.error {
  background: var(--color-error-soft);
  color: var(--color-error);
}


/* ========================================
   СТЪПКА 4 – STEM РЕШЕНИЕ
======================================== */

.challenge-layout {
  display: grid;
  grid-template-columns:
    minmax(290px, 0.82fr)
    minmax(0, 1.18fr);

  gap: 18px;
}

.challenge-information,
.challenge-answer {
  padding: 24px;
}

.challenge-information {
  background:
    linear-gradient(
      135deg,
      #fff9e9,
      #f3faf5
    );
}

.challenge-icon {
  width: 72px;
  height: 72px;
  margin-bottom: 22px;

  display: grid;
  place-items: center;

  border-radius: 22px;

  background: white;

  font-size: 2.35rem;

  box-shadow: var(--shadow-small);
}

.challenge-information h3 {
  margin: 0;
}

.challenge-information p {
  margin:
    10px
    0
    0;

  color: var(--color-text-soft);
}

.challenge-answer {
  display: grid;
  gap: 10px;
}

.challenge-answer > span {
  font-weight: 900;
}

.challenge-answer textarea {
  width: 100%;
  min-height: 210px;
  padding: 15px;

  resize: vertical;

  border: 1px solid var(--color-border);
  border-radius: 14px;

  color: var(--color-text);

  outline: none;

  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.challenge-answer textarea:focus {
  border-color: var(--color-primary);

  box-shadow:
    0 0 0 4px
    rgba(18, 122, 88, 0.1);
}

.challenge-answer small {
  justify-self: end;

  color: var(--color-text-soft);
}


/* ========================================
   СТЪПКА 5 – ОБОБЩЕНИЕ
======================================== */

.project-summary {
  padding: 25px;

  background:
    linear-gradient(
      135deg,
      #f2faf4,
      white
    );
}

.summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 22px;
}

.summary-header h3 {
  margin:
    4px
    0
    0;

  font-size: 1.55rem;
}

.summary-score {
  min-width: 116px;
  padding: 15px;

  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 4px;

  border-radius: 18px;

  background: var(--color-primary);
  color: white;
}

.summary-score strong {
  font-size: 2.1rem;
}

.summary-status-grid {
  margin-top: 23px;

  display: grid;
  grid-template-columns:
    repeat(3, 1fr);

  gap: 12px;
}

.summary-status-card {
  padding: 15px;

  border: 1px solid var(--color-border);
  border-radius: 14px;

  background: white;
}

.summary-status-card span,
.summary-status-card strong {
  display: block;
}

.summary-status-card span {
  color: var(--color-text-soft);

  font-size: 0.8rem;
}

.summary-status-card strong {
  margin-top: 6px;
}

.assessment-rubric {
  margin-top: 18px;
  padding: 21px;
}

.assessment-rubric h3 {
  margin-top: 0;
}

.rubric-row {
  padding: 13px 0;

  display: flex;
  justify-content: space-between;
  gap: 22px;

  border-top: 1px solid var(--color-border);
}


/* ========================================
   БУТОНИ ПОД ЕКРАНИТЕ
======================================== */

.screen-actions {
  margin-top: 30px;

  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.screen-actions-end {
  justify-content: flex-end;
}


/* ========================================
   УЧИТЕЛСКИ ПРОЗОРЕЦ
======================================== */

#teacher-dialog {
  position: relative;

  width: min(580px, calc(100vw - 30px));
  padding: 32px;

  border: 0;
  border-radius: 24px;

  color: var(--color-text);

  box-shadow:
    0 30px 90px
    rgba(0, 0, 0, 0.27);
}

#teacher-dialog::backdrop {
  background: rgba(14, 36, 28, 0.58);

  backdrop-filter: blur(5px);
}

#teacher-dialog > p:not(.screen-label) {
  color: var(--color-text-soft);
}

.dialog-close-button {
  position: absolute;
  top: 14px;
  right: 18px;

  border: 0;
  background: transparent;
  color: var(--color-text);

  font-size: 2rem;
}

.teacher-statistics {
  margin-top: 24px;

  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 11px;
}

.teacher-statistics article {
  padding: 15px;

  display: grid;

  border-radius: 14px;

  background: var(--color-surface-soft);

  text-align: center;
}

.teacher-statistics strong {
  font-size: 1.7rem;
}

.teacher-statistics span {
  color: var(--color-text-soft);

  font-size: 0.8rem;
}


/* ========================================
   ИЗВЕСТИЕ ДОЛУ ВДЯСНО
======================================== */

.notification {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 200;

  max-width: 360px;
  padding: 14px 18px;

  border-radius: 14px;

  background: #173f32;
  color: white;

  box-shadow: var(--shadow-medium);

  opacity: 0;
  pointer-events: none;

  transform: translateY(16px);

  transition:
    opacity var(--transition),
    transform var(--transition);
}

.notification.show {
  opacity: 1;

  transform: translateY(0);
}


/* ========================================
   АДАПТАЦИЯ ЗА ТАБЛЕТ
======================================== */

@media (max-width: 1050px) {

  .lesson-header {
    grid-template-columns:
      1fr
      auto;
  }

  .lesson-progress-wrapper {
    display: none;
  }

  .mission-hero {
    grid-template-columns: 1fr;
  }

  .mission-hero-content {
    text-align: center;
  }

  .mission-introduction {
    margin-left: auto;
    margin-right: auto;
  }

  .mission-buttons,
  .mission-information {
    justify-content: center;
  }

  .mission-workspace {
    grid-template-columns: 1fr;
  }

  .mission-sidebar {
    position: static;

    grid-template-columns:
      repeat(5, minmax(130px, 1fr));

    overflow-x: auto;
  }

  .mission-step {
    grid-template-columns: 1fr;

    text-align: center;
  }

  .step-number {
    margin: 0 auto;
  }

  .step-content small {
    display: none;
  }

  .teams-grid {
    grid-template-columns:
      repeat(2, minmax(0, 1fr));
  }

}


/* ========================================
   АДАПТАЦИЯ ЗА ТЕЛЕФОН
======================================== */

@media (max-width: 720px) {

  .lesson-header {
    min-height: 66px;
    padding: 10px 14px;
  }

  .lesson-logo span {
    display: none;
  }

  .lesson-logo img {
    width: 40px;
    height: 40px;
  }

  .header-actions {
    gap: 7px;
  }

  .header-button,
  .back-button {
    min-height: 39px;
    padding: 0 11px;

    font-size: 0.78rem;
  }

  .mission-hero {
    min-height: auto;
    padding-top: 55px;
  }

  .mission-hero h1 {
    font-size: clamp(2.85rem, 14vw, 4.9rem);
  }

  .mission-buttons {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .mission-information {
    align-items: stretch;
    flex-direction: column;
  }

  .information-card {
    width: 100%;
  }

  .mission-hero-visual {
    min-height: 380px;
  }

  .park-illustration {
    min-height: 380px;
  }

  .park-map {
    border-width: 9px;
    border-radius: 26px;
  }

  .mission-workspace {
    margin-left: 12px;
    margin-right: 12px;
  }

  .mission-sidebar {
    grid-template-columns:
      repeat(5, 110px);
  }

  .mission-screen {
    padding: 25px 18px;
  }

  .mission-brief,
  .mission-goals,
  .teams-grid,
  .task-layout,
  .challenge-layout,
  .summary-status-grid {
    grid-template-columns: 1fr;
  }

  .mission-brief {
    text-align: center;
  }

  .brief-icon {
    margin: 0 auto;
  }

  .geometry-card {
    align-items: center;
    flex-direction: column;

    text-align: center;
  }

  .geometry-content ul {
    display: inline-block;

    text-align: left;
  }

  .summary-header {
    align-items: stretch;
    flex-direction: column;
  }

  .summary-score {
    width: 100%;
  }

  .screen-actions {
    align-items: stretch;
    flex-direction: column-reverse;
  }

  .screen-actions-end {
    flex-direction: column;
  }

  .teacher-statistics {
    grid-template-columns: 1fr;
  }

}
/* ========================================
   ИНТЕРАКТИВНА КАРТА НА ЕКО ПАРКА
======================================== */

.interactive-park-wrapper {
  display: grid;
  gap: 22px;
}

.interactive-park-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 30px;
}

.interactive-park-heading h3 {
  margin: 4px 0 0;

  font-size: clamp(1.45rem, 3vw, 2.2rem);
  line-height: 1.1;
}

.interactive-park-heading p {
  max-width: 420px;
  margin: 0;

  color: var(--color-text-soft);
}

.park-map-label {
  color: var(--color-primary);

  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}


/* ========================================
   ОСНОВНА КАРТА
======================================== */

.interactive-park-map {
  position: relative;

  width: 100%;
  min-height: 610px;

  overflow: hidden;

  border: 12px solid white;
  border-radius: 32px;

  background:
    linear-gradient(
      rgba(255, 255, 255, 0.12),
      rgba(255, 255, 255, 0.12)
    ),
    repeating-linear-gradient(
      0deg,
      transparent 0,
      transparent 31px,
      rgba(41, 111, 67, 0.08) 31px,
      rgba(41, 111, 67, 0.08) 32px
    ),
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 31px,
      rgba(41, 111, 67, 0.08) 31px,
      rgba(41, 111, 67, 0.08) 32px
    ),
    linear-gradient(
      145deg,
      #b9df92,
      #8fca73
    );

  box-shadow:
    inset 0 0 0 1px
    rgba(51, 105, 69, 0.12),
    var(--shadow-medium);
}


/* ========================================
   АЛЕИ
======================================== */

.interactive-path {
  position: absolute;
  z-index: 1;

  border:
    1px solid
    rgba(171, 145, 105, 0.22);

  background:
    linear-gradient(
      135deg,
      #f5ead5,
      #e5d0ac
    );

  box-shadow:
    inset 0 0 0 3px
    rgba(255, 255, 255, 0.24);
}

.path-vertical {
  left: 46%;
  top: -5%;

  width: 9%;
  height: 110%;
}

.path-horizontal {
  left: -5%;
  top: 45%;

  width: 110%;
  height: 10%;
}

.path-diagonal-left {
  left: 39%;
  top: 49%;

  width: 7%;
  height: 47%;

  border-radius: 12px;

  transform: rotate(41deg);
  transform-origin: top center;
}

.path-diagonal-right {
  right: 39%;
  top: 49%;

  width: 7%;
  height: 47%;

  border-radius: 12px;

  transform: rotate(-41deg);
  transform-origin: top center;
}


/* ========================================
   ЦЕНТЪР НА ПАРКА
======================================== */

.park-center-decoration {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;

  width: 105px;
  height: 105px;

  display: grid;
  place-items: center;

  border:
    10px solid
    rgba(245, 234, 213, 0.94);

  border-radius: 50%;

  background:
    linear-gradient(
      145deg,
      #5eac61,
      #348653
    );

  box-shadow:
    0 12px 28px
    rgba(38, 91, 57, 0.2);

  transform: translate(-50%, -50%);
}

.park-center-decoration span {
  font-size: 2.7rem;
}


/* ========================================
   ОБЩ СТИЛ НА ЗОНИТЕ
======================================== */

.park-zone-button {
  position: absolute;
  z-index: 4;

  padding: 16px;

  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  border:
    3px solid
    rgba(255, 255, 255, 0.82);

  color: var(--color-text);

  font-family: inherit;
  text-align: center;

  box-shadow:
    0 13px 26px
    rgba(34, 76, 49, 0.17);

  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease,
    filter 0.25s ease;
}

.park-zone-button:hover {
  z-index: 10;

  border-color: white;

  box-shadow:
    0 20px 40px
    rgba(34, 76, 49, 0.26);

  filter: brightness(1.04);

  transform:
    translateY(-5px)
    scale(1.025);
}

.park-zone-button.selected {
  z-index: 11;

  border-color: var(--color-primary);

  box-shadow:
    0 0 0 6px
    rgba(18, 122, 88, 0.18),
    0 22px 45px
    rgba(27, 80, 58, 0.3);

  transform:
    translateY(-5px)
    scale(1.035);
}

.zone-icon {
  font-size: 2rem;
}

.zone-text {
  display: grid;
  gap: 2px;
}

.zone-text small {
  font-size: 0.67rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.zone-text strong {
  font-size: 0.91rem;
  line-height: 1.15;
}


/* ========================================
   РАЗПОЛОЖЕНИЕ НА ШЕСТТЕ ЗОНИ
======================================== */

.zone-lake {
  left: 5%;
  top: 7%;

  width: 28%;
  height: 31%;

  border-radius: 50%;

  background:
    radial-gradient(
      circle at 35% 28%,
      #a8e4fa,
      #65bee8 55%,
      #409ecb
    );

  color: #134f70;
}

.zone-gazebo {
  right: 6%;
  top: 6%;

  width: 29%;
  height: 31%;

  clip-path:
    polygon(
      50% 0,
      100% 34%,
      84% 100%,
      16% 100%,
      0 34%
    );

  background:
    linear-gradient(
      145deg,
      #ffe79c,
      #eec35f
    );

  color: #6e4d0e;
}

.zone-playground {
  left: 5%;
  bottom: 7%;

  width: 29%;
  height: 29%;

  border-radius: 22px 48px 22px 48px;

  background:
    linear-gradient(
      145deg,
      #b9dff7,
      #72b8e6
    );

  color: #174f70;
}

.zone-flowers {
  left: 35%;
  bottom: 4%;

  width: 30%;
  height: 26%;

  clip-path:
    polygon(
      50% 0,
      100% 100%,
      0 100%
    );

  padding-top: 62px;

  background:
    linear-gradient(
      145deg,
      #f8b5bd,
      #e77d91
    );

  color: #702839;
}

.zone-rest {
  right: 5%;
  bottom: 7%;

  width: 28%;
  height: 29%;

  clip-path:
    polygon(
      25% 5%,
      75% 5%,
      100% 50%,
      75% 95%,
      25% 95%,
      0 50%
    );

  background:
    linear-gradient(
      145deg,
      #d5c0eb,
      #a986d0
    );

  color: #49305f;
}

.zone-urban {
  left: 39%;
  top: 34%;
  z-index: 6;

  width: 22%;
  min-height: 142px;

  border-radius: 50%;

  background:
    linear-gradient(
      145deg,
      #5cae69,
      #2f8451
    );

  color: white;
}


/* ========================================
   ИНФОРМАЦИЯ СЛЕД ИЗБОР
======================================== */

.selected-zone-information {
  padding: 18px 21px;

  display: grid;
  grid-template-columns:
    auto
    minmax(180px, 1fr)
    auto;

  align-items: center;
  gap: 14px;

  border:
    1px solid
    rgba(18, 122, 88, 0.3);

  border-radius: 16px;

  background:
    linear-gradient(
      135deg,
      var(--color-primary-light),
      #f8fcf9
    );
}

.selected-zone-information[hidden] {
  display: none;
}

.selected-zone-information > span {
  padding: 7px 10px;

  border-radius: 999px;

  background: var(--color-primary);
  color: white;

  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.selected-zone-information strong {
  font-size: 1.05rem;
}

.selected-zone-information small {
  color: var(--color-text-soft);

  text-align: right;
}


/* ========================================
   КАРТА НА ТАБЛЕТ И ТЕЛЕФОН
======================================== */

@media (max-width: 850px) {

  .interactive-park-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .interactive-park-map {
    min-height: 540px;
  }

  .zone-text strong {
    font-size: 0.78rem;
  }

  .zone-icon {
    font-size: 1.55rem;
  }

  .selected-zone-information {
    grid-template-columns: 1fr;
  }

  .selected-zone-information small {
    text-align: left;
  }

}


@media (max-width: 570px) {

  .interactive-park-map {
    min-height: 660px;

    display: grid;
    grid-template-columns: 1fr;
    align-content: start;
    gap: 10px;

    padding: 14px;
  }

  .interactive-path,
  .park-center-decoration {
    display: none;
  }

  .park-zone-button {
    position: static;

    width: 100%;
    min-height: 88px;

    justify-content: flex-start;

    border-radius: 16px;
    clip-path: none;

    text-align: left;
  }

  .zone-flowers {
    padding-top: 16px;
  }

  .park-zone-button:hover,
  .park-zone-button.selected {
    transform: none;
  }

}
/* ========================================
   МРЕЖА 16 × 16, ОСИ, МАЩАБ И ЛЕГЕНДА
======================================== */

.interactive-park-map {
  overflow: visible;

  margin-top: 42px;
  margin-left: 42px;

  width: calc(100% - 42px);

  background:
    repeating-linear-gradient(
      to right,
      transparent 0,
      transparent calc(6.25% - 1px),
      rgba(46, 105, 65, 0.16)
        calc(6.25% - 1px),
      rgba(46, 105, 65, 0.16)
        6.25%
    ),
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent calc(6.25% - 1px),
      rgba(46, 105, 65, 0.16)
        calc(6.25% - 1px),
      rgba(46, 105, 65, 0.16)
        6.25%
    ),
    linear-gradient(
      145deg,
      #b9df92,
      #8fca73
    );
}


/* Номера 1–16 */

.park-axis {
  position: absolute;
  z-index: 20;

  display: grid;

  color: var(--color-text);

  font-size: 0.7rem;
  font-weight: 900;

  pointer-events: none;
}

.park-axis span {
  display: grid;
  place-items: center;
}

.park-axis-x {
  left: 0;
  top: -40px;

  width: 100%;
  height: 32px;

  grid-template-columns:
    repeat(16, minmax(0, 1fr));
}

.park-axis-y {
  left: -42px;
  top: 0;

  width: 34px;
  height: 100%;

  grid-template-rows:
    repeat(16, minmax(0, 1fr));
}


/* Мащаб */

.park-scale-badge {
  position: absolute;
  left: 50%;
  top: 14px;
  z-index: 21;

  min-width: 250px;
  padding: 9px 14px;

  display: grid;
  gap: 2px;

  border: 1px solid rgba(18, 122, 88, 0.24);
  border-radius: 13px;

  background: rgba(255, 255, 255, 0.94);

  color: var(--color-text);
  text-align: center;

  box-shadow:
    0 8px 22px
    rgba(32, 76, 52, 0.13);

  transform: translateX(-50%);
}

.park-scale-badge span {
  color: var(--color-primary);

  font-size: 0.66rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.park-scale-badge strong {
  font-size: 0.82rem;
}

.park-scale-badge small {
  color: var(--color-text-soft);

  font-size: 0.68rem;
}


/* Легенда */

.interactive-park-legend {
  padding: 18px 20px;

  display: grid;
  gap: 14px;

  border: 1px solid var(--color-border);
  border-radius: 17px;

  background: white;
}

.legend-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.legend-heading > span {
  font-weight: 900;
}

.legend-heading small {
  color: var(--color-text-soft);
}

.legend-items {
  display: grid;
  grid-template-columns:
    repeat(3, minmax(0, 1fr));

  gap: 10px 16px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 9px;

  color: var(--color-text-soft);

  font-size: 0.82rem;
  font-weight: 700;
}

.legend-color {
  flex: 0 0 18px;

  width: 18px;
  height: 18px;

  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: 5px;

  box-shadow:
    0 0 0 1px
    rgba(28, 71, 48, 0.14);
}

.legend-lake {
  background: #65bee8;
}

.legend-gazebo {
  background: #eec35f;
}

.legend-flowers {
  background: #e77d91;
}

.legend-playground {
  background: #72b8e6;
}

.legend-urban {
  background: #3e955a;
}

.legend-rest {
  background: #a986d0;
}


/* Адаптация */

@media (max-width: 850px) {

  .legend-items {
    grid-template-columns:
      repeat(2, minmax(0, 1fr));
  }

  .legend-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 3px;
  }

}

@media (max-width: 570px) {

  .interactive-park-map {
    margin-top: 0;
    margin-left: 0;

    width: 100%;
  }

  .park-axis,
  .park-scale-badge {
    display: none;
  }

  .legend-items {
    grid-template-columns: 1fr;
  }

}
/* ========================================
   СТЪПКА 4 – 3D МОДЕЛ
======================================== */

.model-viewer-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(260px, 0.8fr);
  gap: 24px;
  align-items: stretch;
  margin-top: 30px;
}

.model-viewer-panel {
  min-width: 0;
}

.model-viewer {
  position: relative;
  width: 100%;
  min-height: 460px;
  overflow: hidden;

  border: 1px solid #dce8e1;
  border-radius: 24px;

  background:
    radial-gradient(
      circle at center,
      rgba(231, 247, 238, 0.95),
      rgba(248, 252, 249, 1)
    );
}

.model-viewer canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.model-loading {
  position: absolute;
  inset: 0;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;

  padding: 30px;
  text-align: center;
}

.model-loading strong {
  font-size: 1.1rem;
  color: #123d31;
}

.model-loading span {
  max-width: 430px;
  color: #65766f;
  line-height: 1.6;
}

.model-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.model-information {
  padding: 24px;

  border: 1px solid #dce8e1;
  border-radius: 24px;

  background: #f9fcfa;
}

.model-information h3 {
  margin: 8px 0 10px;
  font-size: 1.45rem;
  color: #123d31;
}

.model-information > p {
  margin: 0;
  color: #65766f;
  line-height: 1.6;
}

.model-measurements {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid #dce8e1;
}

.model-measurements h4 {
  margin: 0 0 14px;
  color: #123d31;
}

.model-measurements ul {
  margin: 0;
  padding-left: 20px;
}

.model-measurements li {
  margin-bottom: 10px;
  line-height: 1.55;
}

.model-help {
  margin-top: 26px;
  padding: 18px;

  border-radius: 18px;
  background: #edf7f1;
}

.model-help strong {
  color: #123d31;
}

.model-help p {
  margin: 10px 0 0;
  color: #52665e;
  line-height: 1.55;
}

@media (max-width: 900px) {
  .model-viewer-layout {
    grid-template-columns: 1fr;
  }

  .model-viewer {
    min-height: 400px;
  }
}

@media (max-width: 600px) {
  .model-viewer {
    min-height: 330px;
    border-radius: 18px;
  }

  .model-information {
    padding: 20px;
    border-radius: 18px;
  }

  .model-controls {
    flex-direction: column;
  }

  .model-controls button {
    width: 100%;
  }
}
.model-loading[hidden] {
  display: none;
}
/* ========================================
   СТЪПКА 7 – ФИНАЛНА МИСИЯ
======================================== */

.assembly-grid {
  margin-top: 18px;

  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.assembly-card {
  padding: 21px;

  display: grid;
  gap: 8px;
  align-content: start;

  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);

  background: var(--color-surface);
}

.assembly-card-icon {
  width: 44px;
  height: 44px;

  display: grid;
  place-items: center;

  border-radius: 13px;

  background: var(--color-primary-light);

  font-size: 1.35rem;
}

.assembly-card-team {
  color: var(--color-primary);

  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.assembly-card h4 {
  margin: 0;

  font-size: 1.05rem;
}

.assembly-card-role {
  margin: 0;

  color: var(--color-text-soft);

  font-size: 0.88rem;
}

.assembly-card-scale {
  width: fit-content;
  margin: 4px 0 0;
  padding: 8px 11px;

  border-radius: 10px;

  background: var(--color-surface-soft);
  color: var(--color-primary-dark);

  font-size: 0.86rem;
  font-weight: 800;
}

.assembly-card-special {
  margin: 4px 0 0;
  padding: 10px 12px;

  border-radius: 10px;

  background: var(--color-accent-soft);
  color: #7a5b12;

  font-size: 0.84rem;
  font-weight: 700;
}

.assembly-instructions,
.council-condition,
.green-check-panel,
.challenge-box,
.council-defense {
  margin-top: 22px;
  padding: 22px 24px;

  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);

  background: var(--color-surface);
}

.assembly-instructions h3,
.council-defense h3 {
  margin: 4px 0 12px;
}

.assembly-instructions ol {
  margin: 0;
  padding-left: 20px;

  display: grid;
  gap: 8px;

  color: var(--color-text-soft);
}

.council-condition {
  display: grid;
  gap: 14px;

  background:
    linear-gradient(
      135deg,
      #fff9e9,
      #f3faf5
    );
}

.condition-text {
  margin: 0;

  color: var(--color-text);

  font-size: 1.15rem;
  font-weight: 800;
}

.condition-text[hidden] {
  display: none;
}

.green-check-panel {
  display: grid;
  gap: 16px;
}

.green-check-panel[hidden] {
  display: none;
}

.green-check-panel > p {
  margin: 0;

  color: var(--color-text-soft);
}

.green-check-inputs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.green-check-inputs label {
  display: grid;
  gap: 8px;

  color: var(--color-text);

  font-weight: 800;
}

.green-check-inputs input {
  padding: 13px 14px;

  border: 1px solid var(--color-border);
  border-radius: 12px;

  background: white;
  color: var(--color-text);

  outline: none;

  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.green-check-inputs input:focus {
  border-color: var(--color-primary);

  box-shadow:
    0 0 0 4px
    rgba(18, 122, 88, 0.1);
}

.challenge-box {
  display: grid;
  gap: 10px;

  background: var(--color-error-soft);
}

.challenge-box[hidden] {
  display: none;
}

.challenge-box h4 {
  margin: 0;

  color: var(--color-error);
}

.challenge-box p {
  margin: 0;

  color: var(--color-text);
}

.challenge-note {
  color: var(--color-text-soft) !important;

  font-size: 0.9rem;
}

.council-defense {
  background:
    linear-gradient(
      135deg,
      #f2faf4,
      white
    );
}

.council-defense p {
  margin: 0;

  color: var(--color-text-soft);
}

@media (max-width: 720px) {

  .assembly-grid {
    grid-template-columns: 1fr;
  }

  .green-check-inputs {
    grid-template-columns: 1fr;
  }

}
/* ========================================================
   DESIGN PASS — "ИНЖЕНЕРНА МИСИЯ"
   Само визуален слой. Логиката, текстовете и
   изчисленията не се променят.
======================================================== */

:root {
  --team1-color: #4fb0e0;
  --team1-soft: #e3f6fd;
  --team1-dark: #14567a;

  --team2-color: #eec35f;
  --team2-soft: #fff6e0;
  --team2-dark: #7a5a12;

  --team3-color: #e77d91;
  --team3-soft: #fdeef1;
  --team3-dark: #7a2d3d;

  --team4-color: #72b8e6;
  --team4-soft: #eaf6fd;
  --team4-dark: #1c5a7a;

  --team5-color: #3e955a;
  --team5-soft: #e6f6ea;
  --team5-dark: #1f5c37;

  --team6-color: #a986d0;
  --team6-soft: #f3ecfa;
  --team6-dark: #4f3170;
}


/* --------------------------------------------------------
   Панел с лека чертожна текстура
-------------------------------------------------------- */

.mission-panel {
  background-color: var(--color-surface);
  background-image:
    radial-gradient(
      rgba(18, 122, 88, 0.05) 1px,
      transparent 1px
    );
  background-size: 24px 24px;
}


/* --------------------------------------------------------
   SIDEBAR — пътека на прогреса
-------------------------------------------------------- */

.mission-step {
  position: relative;
}

.mission-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 30px;
  top: 100%;

  width: 2px;
  height: 8px;

  background: var(--color-border);

  transition: background var(--transition);
}

.mission-step.completed:not(:last-child)::after {
  background: var(--color-primary);
}

.mission-step.completed .step-number {
  position: relative;

  background: var(--color-primary);
  color: transparent;
}

.mission-step.completed .step-number::after {
  content: "✓";
  position: absolute;
  inset: 0;

  display: grid;
  place-items: center;

  color: white;
  font-weight: 900;
}

.mission-step.active .step-number {
  animation: stepPulseIn 0.35s ease;
}

@keyframes stepPulseIn {
  from { transform: scale(0.8); }
  to { transform: scale(1); }
}


/* --------------------------------------------------------
   HERO — по-живо усещане
-------------------------------------------------------- */

@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.park-sun {
  animation: heroFloat 6s ease-in-out infinite;
}

.park-cloud-one {
  animation: heroFloat 8s ease-in-out infinite;
}

.park-cloud-two {
  animation: heroFloat 7s ease-in-out infinite 0.4s;
}

.park-tree {
  animation: heroFloat 5s ease-in-out infinite;
}

.tree-two { animation-delay: 0.5s; }
.tree-three { animation-delay: 1s; }
.tree-four { animation-delay: 1.4s; }
.tree-five { animation-delay: 0.2s; }

.information-card {
  position: relative;

  transition:
    transform var(--transition),
    box-shadow var(--transition);
}

.information-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-small);
}

.information-card-icon {
  font-size: 1.25rem;
}

#start-mission-button,
.next-step-button {
  position: relative;
  padding-right: 36px;
}

#start-mission-button::after,
.next-step-button::after {
  content: "→";
  position: absolute;
  right: 17px;
  top: 50%;

  transform: translateY(-50%);

  transition: transform var(--transition);
}

#start-mission-button:hover::after,
.next-step-button:hover::after {
  transform: translate(4px, -50%);
}

.primary-button:active,
.secondary-button:active {
  transform: scale(0.97);
}


/* --------------------------------------------------------
   СТЪПКА 2 — зони по екипи
-------------------------------------------------------- */

.zone-lake:hover {
  box-shadow: 0 20px 40px rgba(79, 176, 224, 0.38);
}

.zone-gazebo:hover {
  box-shadow: 0 20px 40px rgba(238, 195, 95, 0.38);
}

.zone-flowers:hover {
  box-shadow: 0 20px 40px rgba(231, 125, 145, 0.38);
}

.zone-playground:hover {
  box-shadow: 0 20px 40px rgba(114, 184, 230, 0.38);
}

.zone-urban:hover {
  box-shadow: 0 20px 40px rgba(62, 149, 90, 0.4);
}

.zone-rest:hover {
  box-shadow: 0 20px 40px rgba(169, 134, 208, 0.38);
}

@keyframes zoneSelectBump {
  0% { transform: translateY(-5px) scale(1.035); }
  45% { transform: translateY(-9px) scale(1.065); }
  100% { transform: translateY(-5px) scale(1.035); }
}

.park-zone-button.selected {
  animation: zoneSelectBump 0.4s ease;
}


/* --------------------------------------------------------
   СТЪПКА 3 — цветен акцент по екип
-------------------------------------------------------- */

.geometry-card {
  border-left: 4px solid var(--color-border);

  transition: border-color var(--transition);
}

.geometry-card--team1 { border-left-color: var(--team1-color); }
.geometry-card--team2 { border-left-color: var(--team2-color); }
.geometry-card--team3 { border-left-color: var(--team3-color); }
.geometry-card--team4 { border-left-color: var(--team4-color); }
.geometry-card--team5 { border-left-color: var(--team5-color); }
.geometry-card--team6 { border-left-color: var(--team6-color); }

.geometry-card--team1 .geometry-icon { color: var(--team1-dark); }
.geometry-card--team2 .geometry-icon { color: var(--team2-dark); }
.geometry-card--team3 .geometry-icon { color: var(--team3-dark); }
.geometry-card--team4 .geometry-icon { color: var(--team4-dark); }
.geometry-card--team5 .geometry-icon { color: var(--team5-dark); }
.geometry-card--team6 .geometry-icon { color: var(--team6-dark); }


/* --------------------------------------------------------
   ОБРАТНА ВРЪЗКА — ясна визуализация
-------------------------------------------------------- */

.answer-feedback {
  position: relative;
  padding-left: 50px;

  animation: feedbackPopIn 0.22s ease;
}

.answer-feedback[hidden] {
  display: none;
}

.answer-feedback::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 16px;

  width: 22px;
  height: 22px;

  display: grid;
  place-items: center;

  border-radius: 50%;

  font-size: 0.82rem;
  font-weight: 900;
}

.answer-feedback.success::before {
  content: "✓";

  background: var(--color-success);
  color: white;
}

.answer-feedback.error::before {
  content: "✗";

  background: var(--color-error);
  color: white;
}

@keyframes feedbackPopIn {
  from {
    opacity: 0;
    transform: translateY(4px) scale(0.98);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}


/* --------------------------------------------------------
   СТЪПКА 4 — 3D модел като чертожна презентация
-------------------------------------------------------- */

.model-viewer {
  background:
    repeating-linear-gradient(
      0deg,
      rgba(18, 122, 88, 0.05) 0,
      rgba(18, 122, 88, 0.05) 1px,
      transparent 1px,
      transparent 24px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(18, 122, 88, 0.05) 0,
      rgba(18, 122, 88, 0.05) 1px,
      transparent 1px,
      transparent 24px
    ),
    radial-gradient(
      circle at center,
      rgba(231, 247, 238, 0.95),
      rgba(248, 252, 249, 1)
    );
}

.model-viewer::before,
.model-viewer::after {
  content: "";
  position: absolute;

  width: 22px;
  height: 22px;

  border: 2px solid rgba(18, 122, 88, 0.32);

  pointer-events: none;
  z-index: 2;
}

.model-viewer::before {
  top: 14px;
  left: 14px;

  border-right: 0;
  border-bottom: 0;
}

.model-viewer::after {
  bottom: 14px;
  right: 14px;

  border-left: 0;
  border-top: 0;
}

.button-icon {
  display: inline-block;
  margin-right: 3px;
}

.model-information {
  border-top: 4px solid var(--color-border);

  transition: border-color var(--transition);
}

.model-information--team1 { border-top-color: var(--team1-color); }
.model-information--team2 { border-top-color: var(--team2-color); }
.model-information--team3 { border-top-color: var(--team3-color); }
.model-information--team4 { border-top-color: var(--team4-color); }
.model-information--team5 { border-top-color: var(--team5-color); }
.model-information--team6 { border-top-color: var(--team6-color); }


/* --------------------------------------------------------
   СТЪПКА 7 — карти по екипи в екипния цвят
-------------------------------------------------------- */

.assembly-card {
  border-top: 4px solid transparent;

  transition:
    transform var(--transition),
    box-shadow var(--transition);
}

.assembly-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-small);
}

.assembly-card--team1 { border-top-color: var(--team1-color); }
.assembly-card--team1 .assembly-card-icon { background: var(--team1-soft); }
.assembly-card--team1 .assembly-card-scale { background: var(--team1-soft); color: var(--team1-dark); }

.assembly-card--team2 { border-top-color: var(--team2-color); }
.assembly-card--team2 .assembly-card-icon { background: var(--team2-soft); }
.assembly-card--team2 .assembly-card-scale { background: var(--team2-soft); color: var(--team2-dark); }

.assembly-card--team3 { border-top-color: var(--team3-color); }
.assembly-card--team3 .assembly-card-icon { background: var(--team3-soft); }
.assembly-card--team3 .assembly-card-scale { background: var(--team3-soft); color: var(--team3-dark); }

.assembly-card--team4 { border-top-color: var(--team4-color); }
.assembly-card--team4 .assembly-card-icon { background: var(--team4-soft); }
.assembly-card--team4 .assembly-card-scale { background: var(--team4-soft); color: var(--team4-dark); }

.assembly-card--team5 { border-top-color: var(--team5-color); }
.assembly-card--team5 .assembly-card-icon { background: var(--team5-soft); }
.assembly-card--team5 .assembly-card-scale { background: var(--team5-soft); color: var(--team5-dark); }

.assembly-card--team6 { border-top-color: var(--team6-color); }
.assembly-card--team6 .assembly-card-icon { background: var(--team6-soft); }
.assembly-card--team6 .assembly-card-scale { background: var(--team6-soft); color: var(--team6-dark); }


/* --------------------------------------------------------
   СТЪПКА 7 — мини карта на парка (визуален мост)
-------------------------------------------------------- */

.finale-mosaic-wrapper {
  margin-top: 22px;
  padding: 22px 24px 26px;

  display: grid;
  justify-items: center;
  gap: 14px;

  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);

  background: var(--color-surface);
}

.finale-mosaic {
  position: relative;

  width: min(300px, 100%);
  aspect-ratio: 1;

  overflow: hidden;

  border: 10px solid white;
  border-radius: 26px;

  background:
    repeating-linear-gradient(
      to right,
      transparent 0,
      transparent calc(6.25% - 1px),
      rgba(46, 105, 65, 0.16) calc(6.25% - 1px),
      rgba(46, 105, 65, 0.16) 6.25%
    ),
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent calc(6.25% - 1px),
      rgba(46, 105, 65, 0.16) calc(6.25% - 1px),
      rgba(46, 105, 65, 0.16) 6.25%
    ),
    linear-gradient(145deg, #b9df92, #8fca73);

  box-shadow: var(--shadow-medium);
}

.finale-mosaic-path {
  position: absolute;
  z-index: 1;

  background: #eedfc7;
}

.finale-mosaic-path-vertical {
  left: 45%;
  top: 0;

  width: 10%;
  height: 100%;
}

.finale-mosaic-path-horizontal {
  left: 0;
  top: 45%;

  width: 100%;
  height: 10%;
}

.finale-mosaic-chip {
  position: absolute;
  z-index: 2;

  display: grid;
  place-items: center;

  border-radius: 16px;
  border: 3px solid rgba(255, 255, 255, 0.85);

  font-size: 1.15rem;

  box-shadow: 0 8px 18px rgba(22, 54, 45, 0.18);
}

.finale-chip-1 {
  left: 6%;
  top: 8%;

  width: 30%;
  height: 30%;

  border-radius: 50%;
  background: var(--team1-color);
}

.finale-chip-2 {
  right: 6%;
  top: 8%;

  width: 30%;
  height: 30%;

  background: var(--team2-color);
}

.finale-chip-3 {
  left: 37%;
  bottom: 6%;

  width: 27%;
  height: 26%;

  background: var(--team3-color);
}

.finale-chip-4 {
  left: 6%;
  bottom: 8%;

  width: 28%;
  height: 28%;

  background: var(--team4-color);
}

.finale-chip-5 {
  left: 50%;
  top: 50%;

  width: 20%;
  height: 20%;

  transform: translate(-50%, -50%);

  border-radius: 50%;
  background: var(--team5-color);
  z-index: 3;
}

.finale-chip-6 {
  right: 6%;
  bottom: 8%;

  width: 28%;
  height: 28%;

  background: var(--team6-color);
}

.finale-mosaic-caption {
  margin: 0;

  color: var(--color-text-soft);

  font-size: 0.85rem;
  text-align: center;
}

@media (max-width: 720px) {

  .finale-mosaic {
    width: min(260px, 100%);
  }

}


/* --------------------------------------------------------
   ДВИЖЕНИЕ ПРИ prefers-reduced-motion
-------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {

  .park-sun,
  .park-cloud-one,
  .park-cloud-two,
  .park-tree,
  .park-zone-button.selected,
  .mission-step.active .step-number,
  .answer-feedback {
    animation: none !important;
  }

  .information-card,
  .assembly-card,
  #start-mission-button::after,
  .next-step-button::after {
    transition: none !important;
  }

}