/* =====================================================
   EDUMATHLAB — ОФЕРТА „КОЛКО СТРУВА РИСКЪТ НА ПЪТЯ?“
   ЧАСТ 1: Header, Hero, превю, заглавия, основен Grid
===================================================== */

:root {
    --oferta-purple: #5b3fa0;
    --oferta-purple-dark: #43307c;
    --oferta-purple-light: #ece5f9;

    --oferta-background: #f7f5fb;
    --oferta-surface: #ffffff;

    --oferta-text: #241b3d;
    --oferta-text-soft: #6b6480;

    --oferta-border: #e2dcf0;

    --oferta-shadow:
        0 22px 58px rgba(36, 27, 61, 0.14);

    --oferta-shadow-soft:
        0 14px 34px rgba(36, 27, 61, 0.09);

    --oferta-radius-small: 14px;
    --oferta-radius-medium: 22px;
    --oferta-radius-large: 34px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;

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

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

    line-height: 1.6;
}

main {
    overflow: hidden;
}

a {
    color: inherit;
}


/* =====================================================
   HEADER
===================================================== */

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

    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--oferta-border);

    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
}

.site-header .header-inner {
    min-height: 82px;
}

.site-header .brand-logo {
    width: 105px;
    height: auto;

    object-fit: contain;
}

.site-header .main-nav a {
    position: relative;

    transition: color 0.25s ease;
}

.site-header .main-nav a::after {
    content: "";

    position: absolute;
    left: 0;
    bottom: -7px;

    width: 0;
    height: 2px;

    border-radius: 999px;

    background: var(--oferta-purple);

    transition: width 0.25s ease;
}

.site-header .main-nav a:hover {
    color: var(--oferta-purple);
}

.site-header .main-nav a:hover::after {
    width: 100%;
}


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

.lesson-offer-hero {
    position: relative;

    padding:
        clamp(55px, 7vw, 95px)
        0
        clamp(75px, 9vw, 125px);

    overflow: hidden;

    background:
        radial-gradient(
            circle at 12% 18%,
            rgba(140, 110, 210, 0.24),
            transparent 28%
        ),
        radial-gradient(
            circle at 88% 16%,
            rgba(217, 154, 63, 0.2),
            transparent 25%
        ),
        linear-gradient(
            135deg,
            #fbfaff 0%,
            #f1ecfb 100%
        );
}

.lesson-offer-hero::before {
    content: "";

    position: absolute;
    top: 90px;
    left: -90px;

    width: 260px;
    height: 260px;

    border-radius: 50%;

    background: rgba(255, 255, 255, 0.38);

    filter: blur(2px);
}

.lesson-offer-hero::after {
    content: "";

    position: absolute;
    right: -100px;
    bottom: -120px;

    width: 340px;
    height: 340px;

    border-radius: 50%;

    background: rgba(91, 63, 160, 0.08);
}

.lesson-offer-hero .container {
    position: relative;
    z-index: 2;
}


/* =====================================================
   ЛИНК НАЗАД
===================================================== */

.lesson-offer-back {
    width: fit-content;
    margin-bottom: 38px;

    display: inline-flex;
    align-items: center;
    gap: 8px;

    color: var(--oferta-purple-dark);
    text-decoration: none;

    font-size: 0.88rem;
    font-weight: 800;

    transition:
        color 0.25s ease,
        transform 0.25s ease;
}

.lesson-offer-back:hover {
    color: var(--oferta-purple);

    transform: translateX(-5px);
}


/* =====================================================
   HERO GRID
===================================================== */

.lesson-offer-hero-grid {
    display: grid;
    grid-template-columns:
        minmax(0, 1.08fr)
        minmax(360px, 0.92fr);

    align-items: center;
    gap: clamp(55px, 8vw, 110px);
}

.lesson-offer-intro {
    position: relative;
    z-index: 3;
}

.lesson-offer-intro .eyebrow {
    margin-bottom: 18px;

    color: var(--oferta-purple);

    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.lesson-offer-intro h1 {
    max-width: 800px;
    margin: 0;

    color: var(--oferta-text);

    font-size: clamp(2.6rem, 5vw, 4.6rem);
    line-height: 1.02;
    letter-spacing: -0.045em;
}

.lesson-offer-description {
    max-width: 690px;
    margin: 28px 0 0;

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

    font-size: clamp(1.04rem, 1.35vw, 1.23rem);
    line-height: 1.75;
}


/* =====================================================
   МАЛКИ ЕТИКЕТИ ПОД ОПИСАНИЕТО
===================================================== */

.lesson-offer-meta {
    margin-top: 32px;

    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.lesson-offer-meta span {
    padding: 9px 14px;

    border: 1px solid rgba(91, 63, 160, 0.17);
    border-radius: 999px;

    background: rgba(255, 255, 255, 0.75);
    color: var(--oferta-text);

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

    box-shadow:
        0 8px 20px rgba(36, 27, 61, 0.05);

    backdrop-filter: blur(8px);
}

.offer-data-note {
    max-width: 560px;
    margin-top: 22px;
    padding: 12px 14px;

    border: 1px solid #f0dfae;
    border-radius: 12px;

    background: #fbf1e0;
    color: #6e4d0e;

    font-size: 0.84rem;
    line-height: 1.55;
}


/* =====================================================
   HERO ВИЗУАЛИЗАЦИЯ
===================================================== */

.lesson-offer-preview {
    position: relative;

    min-height: 400px;

    display: grid;
    place-items: center;
}

.lesson-offer-preview::before {
    content: "";

    position: absolute;

    width: 390px;
    height: 390px;

    border-radius: 50%;

    background:
        radial-gradient(
            circle,
            rgba(255, 255, 255, 0.7),
            rgba(255, 255, 255, 0)
        );
}

.offer-risk-preview {
    position: relative;
    z-index: 3;

    width: 100%;
    max-width: 400px;
    padding: 30px 28px;

    border-radius: 26px;

    background: white;
    box-shadow: var(--oferta-shadow);
}

.offer-risk-preview-label {
    margin: 0 0 20px;
    color: var(--oferta-text-soft);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.offer-risk-bar-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
    margin-bottom: 20px;
}

.offer-risk-bar-name {
    color: var(--oferta-text);
    font-size: 0.82rem;
    font-weight: 700;
}

.offer-risk-bar-track {
    width: 100%;
    height: 14px;

    overflow: hidden;

    border-radius: 999px;
    background: #eef0f4;
}

.offer-risk-bar {
    height: 100%;
    border-radius: inherit;
}

.offer-risk-bar-high {
    width: 88%;
    background: linear-gradient(90deg, #e08a8a, #b64d4d);
}

.offer-risk-bar-low {
    width: 18%;
    background: linear-gradient(90deg, #4fb889, #168356);
}

.offer-risk-bar-mid {
    width: 35%;
    background: linear-gradient(90deg, #6fa0d9, #2f6fb0);
}

.offer-risk-bar-value {
    justify-self: end;
    color: var(--oferta-text);
    font-weight: 800;
}

.offer-risk-preview-formula {
    margin: 10px 0 0;
    padding-top: 16px;

    border-top: 1px solid var(--oferta-border);

    color: var(--oferta-text-soft);
    font-family: "Courier New", monospace;
    text-align: center;
}


/* =====================================================
   СЕКЦИЯ „ИЗБЕРЕТЕ НАЧИН“
===================================================== */

.lesson-options {
    position: relative;

    padding:
        clamp(80px, 9vw, 125px)
        0;

    background:
        linear-gradient(
            180deg,
            #f7f5fb 0%,
            #f0ebfa 100%
        );
}

.lesson-options .section-heading {
    max-width: 820px;
    margin: 0 auto;

    text-align: center;
}

.lesson-options .section-heading .eyebrow {
    margin-bottom: 14px;

    color: var(--oferta-purple);

    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.lesson-options .section-heading h2 {
    margin: 0;

    color: var(--oferta-text);

    font-size: clamp(2.2rem, 4.5vw, 4rem);
    line-height: 1.05;
    letter-spacing: -0.045em;
}

.lesson-options .section-description {
    max-width: 700px;
    margin:
        22px
        auto
        0;

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

    font-size: 1.05rem;
    line-height: 1.7;
}


/* =====================================================
   GRID ЗА PDF И PREMIUM
===================================================== */

.lesson-options-grid {
    max-width: 1120px;
    margin:
        52px
        auto
        0;

    display: grid;
    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 26px;

    align-items: stretch;
}

.lesson-option-card {
    position: relative;

    min-height: 660px;
    padding:
        clamp(28px, 3.5vw, 42px);

    display: flex;
    flex-direction: column;

    border: 1px solid var(--oferta-border);
    border-radius: 30px;

    background: var(--oferta-surface);

    box-shadow: var(--oferta-shadow-soft);

    transition:
        transform 0.3s ease,
        box-shadow 0.3s ease,
        border-color 0.3s ease;
}

.lesson-option-card:hover {
    transform: translateY(-8px);

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

.premium-option {
    border: 2px solid var(--oferta-purple);

    background:
        linear-gradient(
            180deg,
            #f3effc 0%,
            #ffffff 36%
        );
}


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

@media (max-width: 1000px) {

    .lesson-offer-hero-grid {
        grid-template-columns: 1fr;

        text-align: center;
    }

    .lesson-offer-description {
        margin-left: auto;
        margin-right: auto;
    }

    .lesson-offer-meta {
        justify-content: center;
    }

    .offer-data-note {
        margin-left: auto;
        margin-right: auto;
    }

    .lesson-offer-preview {
        min-height: 380px;
    }

    .lesson-options-grid {
        max-width: 720px;

        grid-template-columns: 1fr;
    }

    .lesson-option-card {
        min-height: auto;
    }

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

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

}


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

@media (max-width: 700px) {

    .lesson-offer-hero {
        padding:
            42px
            0
            70px;
    }

    .lesson-offer-intro h1 {
        font-size: clamp(2.3rem, 11vw, 3.3rem);
    }

    .lesson-offer-description {
        font-size: 1rem;
    }

    .lesson-offer-meta {
        align-items: stretch;
        flex-direction: column;
    }

    .lesson-offer-meta span {
        width: 100%;

        text-align: center;
    }

    .lesson-offer-preview {
        min-height: 320px;
    }

    .offer-risk-preview {
        padding: 24px 20px;
    }

    .lesson-options {
        padding:
            70px
            0;
    }

    .lesson-options .section-heading h2 {
        font-size: 2.3rem;
    }

    .lesson-option-card {
        padding: 25px;

        border-radius: 24px;
    }

    .recommended-badge {
        position: static;

        width: fit-content;
        margin-bottom: 20px;
    }

    .option-description {
        min-height: auto;
    }

    .option-price {
        align-items: flex-start;
        flex-direction: column;
    }

    .comparison-box {
        padding: 28px 22px;

        border-radius: 24px;
    }

    .comparison-modes article:hover {
        transform: none;
    }

}


/* =====================================================
   EDUMATHLAB — ОФЕРТА
   ЧАСТ 2: PDF/Premium карти, бутони, сравнение, footer
===================================================== */

.option-top {
    position: relative;
}

.option-label {
    display: inline-flex;
    align-items: center;

    width: fit-content;
    margin-bottom: 24px;
    padding: 7px 11px;

    border-radius: 999px;

    background: var(--oferta-purple-light);
    color: var(--oferta-purple-dark);

    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.pdf-option .option-label {
    background: #fff3cf;
    color: #8c6713;
}


/* =====================================================
   СИМВОЛИ PDF И PREMIUM
===================================================== */

.option-symbol {
    width: 70px;
    height: 70px;
    margin-bottom: 22px;

    display: grid;
    place-items: center;

    border-radius: 20px;

    background:
        linear-gradient(
            145deg,
            #fff4d2,
            #f6d77e
        );

    color: #78540d;

    font-size: 1rem;
    font-weight: 900;

    box-shadow:
        0 12px 25px rgba(127, 90, 14, 0.12);
}

.premium-symbol {
    background:
        linear-gradient(
            145deg,
            var(--oferta-purple),
            var(--oferta-purple-dark)
        );

    color: white;

    font-size: 1.9rem;

    box-shadow:
        0 14px 28px rgba(91, 63, 160, 0.24);
}


/* =====================================================
   ТЕКСТ В КАРТИТЕ
===================================================== */

.option-number {
    margin: 0 0 4px;

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

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

.lesson-option-card h3 {
    margin: 0;

    color: var(--oferta-text);

    font-size: clamp(1.8rem, 3vw, 2.4rem);
    line-height: 1.1;
    letter-spacing: -0.035em;
}

.option-description {
    min-height: 82px;
    margin: 15px 0 0;

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

    font-size: 0.96rem;
    line-height: 1.7;
}


/* =====================================================
   СПИСЪК С ПРЕДИМСТВА
===================================================== */

.option-features {
    margin: 30px 0;
    padding: 0;

    display: grid;
    gap: 13px;

    list-style: none;
}

.option-features li {
    position: relative;

    padding-left: 31px;

    color: var(--oferta-text);

    font-size: 0.94rem;
    line-height: 1.5;
}

.option-features li::before {
    content: "✓";

    position: absolute;
    left: 0;
    top: 1px;

    width: 21px;
    height: 21px;

    display: grid;
    place-items: center;

    border-radius: 50%;

    background: var(--oferta-purple-light);
    color: var(--oferta-purple);

    font-size: 0.72rem;
    font-weight: 900;
}

.pdf-option .option-features li::before {
    background: #fff3cf;
    color: #9b7111;
}


/* =====================================================
   ЕТИКЕТ „ПРЕПОРЪЧАНО“
===================================================== */

.recommended-badge {
    position: absolute;
    top: 22px;
    right: 22px;
    z-index: 5;

    padding: 8px 13px;

    border-radius: 999px;

    background: var(--oferta-purple);
    color: white;

    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;

    box-shadow:
        0 9px 22px rgba(91, 63, 160, 0.24);
}


/* =====================================================
   ДОЛНА ЧАСТ НА КАРТИТЕ
===================================================== */

.option-bottom {
    margin-top: auto;
    padding-top: 25px;

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

.option-price {
    margin-bottom: 19px;

    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
}

.option-price strong {
    color: var(--oferta-text);

    font-size: 2.25rem;
    line-height: 1;
    letter-spacing: -0.04em;
}

.option-price span {
    color: var(--oferta-text-soft);

    font-size: 0.8rem;
}


/* =====================================================
   БУТОНИ
===================================================== */

.option-button {
    width: 100%;
    min-height: 54px;
    padding: 13px 18px;

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

    border-radius: 14px;

    text-decoration: none;
    text-align: center;

    font-size: 0.94rem;
    font-weight: 900;

    transition:
        transform 0.25s ease,
        background 0.25s ease,
        box-shadow 0.25s ease;
}

.option-button:hover {
    transform: translateY(-3px);
}

.pdf-button {
    background:
        linear-gradient(
            135deg,
            #f4d16e,
            #e9bb45
        );

    color: #60460b;

    box-shadow:
        0 13px 27px rgba(154, 111, 18, 0.18);
}

.pdf-button:hover {
    background:
        linear-gradient(
            135deg,
            #f0c95a,
            #dda92c
        );

    box-shadow:
        0 18px 34px rgba(154, 111, 18, 0.25);
}

.premium-button {
    background:
        linear-gradient(
            135deg,
            var(--oferta-purple),
            var(--oferta-purple-dark)
        );

    color: white;

    box-shadow:
        0 14px 30px rgba(91, 63, 160, 0.24);
}

.premium-button:hover {
    background:
        linear-gradient(
            135deg,
            #4b3488,
            #362566
        );

    box-shadow:
        0 19px 38px rgba(91, 63, 160, 0.32);
}

.option-bottom small {
    display: block;

    margin-top: 12px;

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

    font-size: 0.72rem;
    line-height: 1.5;
    text-align: center;
}


/* =====================================================
   СЕКЦИЯ „ЕДИН УРОК. ТРИ НАЧИНА“
===================================================== */

.lesson-comparison {
    padding:
        15px
        0
        clamp(85px, 9vw, 125px);

    background:
        linear-gradient(
            180deg,
            #f0ebfa,
            #f7f5fb
        );
}

.comparison-box {
    padding:
        clamp(32px, 5vw, 58px);

    display: grid;
    grid-template-columns:
        minmax(260px, 0.78fr)
        minmax(0, 1.22fr);

    align-items: center;
    gap: clamp(35px, 6vw, 75px);

    border-radius: 32px;

    background:
        radial-gradient(
            circle at 92% 8%,
            rgba(255, 255, 255, 0.15),
            transparent 28%
        ),
        linear-gradient(
            135deg,
            #2c1f4d,
            #5b3fa0
        );

    color: white;

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

.comparison-box .eyebrow {
    margin-bottom: 14px;

    color: #d7c9f2;

    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.comparison-box h2 {
    margin: 0;

    color: white;

    font-size: clamp(2rem, 4vw, 3.7rem);
    line-height: 1.03;
    letter-spacing: -0.045em;
}

.comparison-modes {
    display: grid;
    gap: 12px;
}

.comparison-modes article {
    padding: 18px 20px;

    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 16px;

    background: rgba(255, 255, 255, 0.09);

    transition:
        background 0.25s ease,
        transform 0.25s ease;
}

.comparison-modes article:hover {
    background: rgba(255, 255, 255, 0.14);

    transform: translateX(5px);
}

.comparison-modes strong,
.comparison-modes span {
    display: block;
}

.comparison-modes strong {
    color: white;

    font-size: 0.98rem;
}

.comparison-modes span {
    margin-top: 4px;

    color: rgba(255, 255, 255, 0.72);

    font-size: 0.84rem;
}


/* =====================================================
   FOOTER — ПОПРАВКА НА ПОДРЕЖДАНЕТО
===================================================== */

.site-footer {
    margin-top: 0;
}

.site-footer .brand-footer {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;

    text-decoration: none;
}

.site-footer .brand-name {
    display: block;

    color: white;

    font-size: 1.12rem;
    font-weight: 900;
}

.site-footer .brand-tagline {
    display: block;

    color: rgba(255, 255, 255, 0.65);

    font-size: 0.75rem;
    font-weight: 600;
}

.site-footer .footer-grid > div:first-child p {
    max-width: 390px;
}

.site-footer .footer-grid a {
    width: fit-content;
}

.site-footer .footer-grid a:hover {
    color: #cbb8ee;
}


@media (max-width: 1000px) {

    .comparison-box {
        grid-template-columns: 1fr;

        text-align: center;
    }

    .comparison-modes {
        text-align: left;
    }

}


/* =====================================================
   КАК ПРОТИЧА
===================================================== */

.lesson-flow {
    padding:
        clamp(70px, 8vw, 100px)
        0
        0;
}

.lesson-flow .section-heading {
    max-width: 700px;
    margin: 0 auto;

    text-align: center;
}

.lesson-flow .eyebrow {
    margin-bottom: 14px;

    color: var(--oferta-purple);

    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.lesson-flow h2 {
    margin: 0;

    color: var(--oferta-text);

    font-size: clamp(2.2rem, 4vw, 3.4rem);
    line-height: 1.05;
    letter-spacing: -0.045em;
}

.lesson-flow-grid {
    max-width: 1000px;
    margin:
        52px
        auto
        0;

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

    gap: 22px;
}

/* Мобилен изглед на стъпките – след основното правило, за да не се презаписва */
@media (max-width: 1000px) {
    .lesson-flow-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 600px) {
    .lesson-flow-grid {
        grid-template-columns: 1fr;
    }
}

.flow-step {
    padding: 30px 26px;

    border: 1px solid var(--oferta-border);
    border-radius: 24px;

    background: var(--oferta-surface);

    box-shadow: var(--oferta-shadow-soft);
}

.flow-step-number {
    width: 40px;
    height: 40px;
    margin-bottom: 18px;

    display: grid;
    place-items: center;

    border-radius: 12px;

    background: var(--oferta-purple-light);
    color: var(--oferta-purple-dark);

    font-size: 1.1rem;
    font-weight: 900;
}

.flow-step h3 {
    margin: 0 0 10px;

    color: var(--oferta-text);

    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

.flow-step p {
    margin: 0;

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

    font-size: 0.92rem;
    line-height: 1.6;
}


/* =====================================================
   ЗА УЧЕНИКА / ЗА УЧИТЕЛЯ
===================================================== */

.lesson-audience {
    padding:
        clamp(60px, 7vw, 90px)
        0
        0;
}

.lesson-audience-grid {
    display: grid;
    grid-template-columns:
        repeat(2, minmax(0, 1fr));

    gap: 22px;
}

.audience-card {
    padding:
        clamp(28px, 3.5vw, 38px);

    border: 1px solid var(--oferta-border);
    border-radius: 26px;

    background: var(--oferta-surface);

    box-shadow: var(--oferta-shadow-soft);
}

.audience-label {
    display: inline-flex;
    margin-bottom: 16px;
    padding: 6px 12px;

    border-radius: 999px;

    background: var(--oferta-purple-light);
    color: var(--oferta-purple-dark);

    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.audience-card h3 {
    margin: 0 0 18px;

    color: var(--oferta-text);

    font-size: 1.4rem;
    letter-spacing: -0.03em;
}

.audience-list {
    margin: 0;
    padding: 0;

    display: grid;
    gap: 12px;

    list-style: none;
}

.audience-list li {
    position: relative;

    padding-left: 28px;

    color: var(--oferta-text);

    font-size: 0.92rem;
    line-height: 1.55;
}

.audience-list li::before {
    content: "✓";

    position: absolute;
    left: 0;
    top: 1px;

    width: 19px;
    height: 19px;

    display: grid;
    place-items: center;

    border-radius: 50%;

    background: var(--oferta-purple-light);
    color: var(--oferta-purple);

    font-size: 0.68rem;
    font-weight: 900;
}