:root {
    --blue-900: #16425b;
    --blue-800: #1e5670;
    --blue-700: #2b6f8f;
    --blue-600: #3b88a8;
    --blue-500: #5aa5bd;
    --beige-100: #faf7f1;
    --beige-200: #f1ebe0;
    --beige-300: #e6ddcc;
    --green-600: #4f8a6b;
    --green-700: #3d7257;
    --text: #2c3a45;
    --text-soft: #5c6b76;
    --white: #ffffff;
    --shadow: 0 12px 34px rgba(22, 66, 91, 0.12);
    --radius: 16px;
    --font-sans: "Inter", system-ui, -apple-system, sans-serif;
    --font-serif: "Lora", Georgia, serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: min(1180px, 92%);
    margin: 0 auto;
}

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

/* Кнопки */
.btn {
    display: inline-block;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 16px;
    padding: 14px 26px;
    border-radius: 12px;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn--primary {
    background: var(--blue-800);
    color: var(--white);
    box-shadow: 0 8px 20px rgba(27, 86, 112, 0.28);
}

.btn--primary:hover {
    background: var(--blue-900);
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(27, 86, 112, 0.34);
}

.btn--ghost {
    background: transparent;
    color: var(--blue-800);
    border-color: var(--blue-700);
}

.btn--ghost:hover {
    background: var(--beige-100);
}

.btn--light {
    background: var(--white);
    color: var(--blue-800);
}

.btn--light:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.15);
}

.btn--large {
    padding: 16px 34px;
    font-size: 17px;
}

.btn--block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Секции */
section {
    padding: 84px 0;
}

.section__head {
    max-width: 720px;
    margin-bottom: 48px;
}

.section__eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--green-600);
    margin-bottom: 14px;
}

.section__title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 3.4vw, 40px);
    line-height: 1.2;
    color: var(--blue-900);
    font-weight: 600;
}

.section__lead {
    margin-top: 16px;
    color: var(--text-soft);
    font-size: 18px;
}

/* Шапка */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--beige-300);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.header__logo {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 600;
    color: var(--blue-900);
    text-decoration: none;
}

.header__logo span {
    color: var(--green-600);
}

.header__nav {
    display: flex;
    gap: 28px;
}

.header__nav a {
    color: var(--text);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
}

.header__nav a:hover {
    color: var(--blue-700);
}

.header__cta {
    padding: 10px 20px;
    font-size: 14px;
}

/* Герой */
.hero {
    background: linear-gradient(135deg, var(--beige-100), var(--beige-200));
    padding: 72px 0 84px;
}

.hero__inner {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 56px;
    align-items: center;
}

.hero__badge {
    display: inline-block;
    background: var(--white);
    color: var(--blue-700);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    padding: 8px 16px;
    border-radius: 100px;
    margin-bottom: 22px;
    border: 1px solid var(--blue-500);
}

.hero__title {
    font-family: var(--font-serif);
    font-size: clamp(30px, 4.2vw, 46px);
    line-height: 1.18;
    color: var(--blue-900);
    font-weight: 600;
    margin-bottom: 20px;
}

.hero__subtitle {
    font-size: 18px;
    color: var(--text-soft);
    max-width: 560px;
    margin-bottom: 30px;
}

.hero__actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.hero__points {
    list-style: none;
    display: grid;
    gap: 10px;
}

.hero__points li {
    position: relative;
    padding-left: 30px;
    font-weight: 500;
    color: var(--text);
}

.hero__points li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--green-600);
    color: var(--white);
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 12px;
}

/* Фото-карточка */
.hero__photo {
    display: flex;
    justify-content: center;
}

.photo-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px;
    width: 100%;
    max-width: 360px;
}

.photo-card__img {
    height: 300px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--blue-700), var(--blue-900));
    margin-bottom: 16px;
    display: grid;
    place-items: center;
    color: var(--white);
}

.photo-card__img::after {
    content: "Фото эксперта";
    font-family: var(--font-serif);
    font-size: 18px;
    opacity: 0.7;
}

.photo-card__name {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 600;
    color: var(--blue-900);
}

.photo-card__role {
    color: var(--text-soft);
    font-size: 14px;
    margin: 4px 0 16px;
}

.photo-card__tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tag {
    background: var(--beige-100);
    color: var(--blue-800);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 100px;
    border: 1px solid var(--beige-300);
}

/* Проблемы */
.problems {
    background: var(--white);
}

.problems__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.problem-card {
    background: var(--beige-100);
    border: 1px solid var(--beige-300);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.problem-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}

.problem-card__num {
    display: inline-block;
    font-family: var(--font-serif);
    font-size: 40px;
    font-weight: 600;
    color: var(--blue-500);
    margin-bottom: 16px;
}

.problem-card__title {
    font-family: var(--font-serif);
    font-size: 20px;
    color: var(--blue-900);
    margin-bottom: 12px;
    font-weight: 600;
}

.problem-card p {
    color: var(--text-soft);
    font-size: 15px;
}

/* Курс */
.course {
    background: var(--blue-900);
    color: var(--beige-100);
}

.course .section__eyebrow {
    color: var(--blue-500);
}

.course .section__title {
    color: var(--white);
}

.course .section__lead {
    color: rgba(250, 247, 241, 0.75);
}

.course__list {
    display: grid;
    gap: 20px;
}

.course-item {
    display: flex;
    gap: 24px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 32px 36px;
}

.course-item__icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--green-600);
    border-radius: 14px;
    display: grid;
    place-items: center;
    font-size: 26px;
    color: var(--white);
}

.course-item h3 {
    font-family: var(--font-serif);
    font-size: 22px;
    color: var(--white);
    margin-bottom: 8px;
    font-weight: 600;
}

.course-item p {
    color: rgba(250, 247, 241, 0.75);
    font-size: 16px;
}

/* Эксперт */
.author {
    background: var(--beige-100);
}

.author__inner {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 64px;
    align-items: center;
}

.author__photo {
    height: 480px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--beige-300), var(--blue-500));
    display: grid;
    place-items: center;
}

.author__photo::after {
    content: "Фото эксперта";
    font-family: var(--font-serif);
    font-size: 20px;
    color: var(--blue-900);
    opacity: 0.6;
}

.author__content p {
    color: var(--text-soft);
    font-size: 17px;
    margin: 20px 0 28px;
}

.author__facts {
    list-style: none;
    display: grid;
    gap: 14px;
}

.author__facts li {
    position: relative;
    padding-left: 28px;
    font-weight: 500;
}

.author__facts li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 2px;
    width: 18px;
    height: 18px;
    background: var(--green-600);
    color: var(--white);
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 11px;
}

/* Соцдоказательства */
.proof {
    background: var(--white);
}

.proof__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.proof-card {
    background: var(--beige-100);
    border-radius: var(--radius);
    padding: 32px;
    border-top: 4px solid var(--green-600);
}

.proof-card blockquote {
    font-family: var(--font-serif);
    font-size: 17px;
    font-style: italic;
    color: var(--text);
    margin-bottom: 20px;
}

.proof-card figcaption {
    color: var(--text-soft);
    font-size: 14px;
}

.proof-card figcaption strong {
    color: var(--blue-800);
}

.proof__logos {
    margin-top: 48px;
    text-align: center;
    color: var(--text-soft);
    font-size: 14px;
}

.logos {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 16px;
}

.logo-pill {
    border: 1px solid var(--beige-300);
    background: var(--white);
    color: var(--blue-700);
    font-weight: 600;
    font-size: 14px;
    padding: 10px 22px;
    border-radius: 100px;
}

/* Форма */
.enroll {
    background: var(--beige-100);
}

.enroll__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.enroll__title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 3vw, 38px);
    color: var(--blue-900);
    font-weight: 600;
    margin-bottom: 16px;
}

.enroll__info > p {
    color: var(--text-soft);
    font-size: 17px;
    margin-bottom: 20px;
}

.seats {
    background: var(--white);
    border: 1px solid var(--beige-300);
    border-radius: var(--radius);
    padding: 22px;
    margin-bottom: 16px;
}

.seats__bar {
    height: 10px;
    background: var(--beige-300);
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: 12px;
}

.seats__fill {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--blue-600), var(--green-600));
    border-radius: 100px;
}

.seats__note {
    font-size: 15px;
    margin: 0 !important;
}

.enroll__hint {
    font-style: italic;
    font-family: var(--font-serif);
}

.enroll__cta {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 38px;
    text-align: center;
}

.enroll__cta .btn {
    margin: 12px 0 8px;
}

/* Модальное окно */
.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.is-open {
    display: flex;
}

.modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(22, 66, 91, 0.55);
    backdrop-filter: blur(3px);
    cursor: pointer;
}

.modal__box {
    position: relative;
    width: 100%;
    max-width: 460px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.25s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(24px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal__close {
    position: absolute;
    top: 14px;
    right: 16px;
    z-index: 2;
    width: 36px;
    height: 36px;
    border: none;
    background: var(--beige-100);
    color: var(--text);
    font-size: 24px;
    line-height: 1;
    border-radius: 50%;
    cursor: pointer;
    padding: 0;
    transition: background 0.15s ease;
}

.modal__close:hover {
    background: var(--beige-300);
}

/* Форма */
.enroll__form {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 38px;
}

.enroll__form-title {
    font-family: var(--font-serif);
    font-size: 26px;
    color: var(--blue-900);
    font-weight: 600;
    margin-bottom: 8px;
}

.enroll__form-sub {
    color: var(--text-soft);
    font-size: 14px;
    margin-bottom: 26px;
}

.field {
    display: block;
    margin-bottom: 18px;
}

.field__label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.field input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--beige-300);
    border-radius: 10px;
    font-family: var(--font-sans);
    font-size: 16px;
    color: var(--text);
    background: var(--beige-100);
    transition: border-color 0.15s ease;
}

.field input:focus {
    outline: none;
    border-color: var(--blue-600);
    background: var(--white);
}

.field.error input {
    border-color: #c94f4f;
    background: #fdf3f3;
}

.field__error {
    display: none;
    color: #c94f4f;
    font-size: 13px;
    margin-top: 6px;
}

.field.error .field__error {
    display: block;
}

.form-status {
    display: none;
    margin-top: 16px;
    padding: 14px;
    border-radius: 10px;
    font-weight: 500;
    text-align: center;
    font-size: 15px;
}

.form-status.is-visible {
    display: block;
}

.form-status.is-success {
    background: #e8f4ec;
    color: var(--green-700);
}

.form-status.is-error {
    background: #fdf3f3;
    color: #c94f4f;
}

.form-legal {
    margin-top: 16px;
    font-size: 12px;
    color: var(--text-soft);
    text-align: center;
}

/* Финальный CTA */
.final {
    background: linear-gradient(135deg, var(--blue-800), var(--blue-900));
    text-align: center;
    color: var(--white);
}

.final__title {
    font-family: var(--font-serif);
    font-size: clamp(28px, 3.4vw, 40px);
    line-height: 1.2;
    margin-bottom: 16px;
}

.final__text {
    color: rgba(250, 247, 241, 0.8);
    font-size: 18px;
    margin-bottom: 32px;
}

/* Подвал */
.footer {
    background: var(--blue-900);
    padding: 30px 0;
    color: rgba(250, 247, 241, 0.7);
}

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

.footer__link {
    color: var(--blue-500);
    text-decoration: none;
    font-size: 14px;
}

/* Адаптив */
@media (max-width: 900px) {
    .hero__inner,
    .enroll__inner,
    .author__inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero__photo,
    .author__photo {
        order: -1;
    }

    .author__photo {
        height: 320px;
    }

    .problems__grid,
    .proof__grid {
        grid-template-columns: 1fr;
    }

    .header__nav {
        display: none;
    }

    section {
        padding: 60px 0;
    }
}

@media (max-width: 560px) {
    .header__cta {
        display: none;
    }

    .course-item {
        flex-direction: column;
        padding: 26px;
    }

    .enroll__form {
        padding: 28px;
    }
}