:root {
    --bg: #eef4fb;
    --panel: rgba(255, 255, 255, 0.82);
    --panel-strong: rgba(255, 255, 255, 0.94);
    --line: rgba(25, 70, 132, 0.14);
    --text: #10213e;
    --muted: #5f6f88;
    --blue: #1f5bff;
    --blue-deep: #1239b7;
    --cyan: #1fade3;
    --danger: #b8324b;
    --shadow: 0 24px 60px rgba(24, 64, 122, 0.16);
    --radius-xl: 32px;
    --radius-lg: 24px;
    --radius-md: 18px;
    --font-ui: "Trebuchet MS", "Verdana", sans-serif;
    --font-display: "Georgia", "Times New Roman", serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-ui);
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(31, 173, 227, 0.16), transparent 26%),
        radial-gradient(circle at bottom right, rgba(31, 91, 255, 0.18), transparent 32%),
        linear-gradient(180deg, #f8fbff 0%, #ecf3fa 100%);
}

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

a {
    color: inherit;
    text-decoration: none;
}

.shell {
    width: min(1360px, calc(100vw - 48px));
    margin: 0 auto;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.hero {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    background: url("/presentation_asset.php?file=tild3935-6237-4665-b366-383631393535__photo.png") center/cover no-repeat;
}

.hero__backdrop {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 80% 12%, rgba(31, 173, 227, 0.12), transparent 18%),
        radial-gradient(circle at 12% 84%, rgba(31, 91, 255, 0.1), transparent 22%);
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 64px 0;
}

.section__eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.82rem;
    color: var(--cyan);
}

.subhero h1,
.person-page h1,
.admin-panel h1,
.admin-header h1,
.section h2 {
    margin: 0;
    font-family: var(--font-display);
    line-height: 1.02;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 58px;
    padding: 0 24px;
    border: 0;
    border-radius: 999px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

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

.button--primary {
    color: #fff;
    background: linear-gradient(135deg, var(--cyan), var(--blue));
}

.button--hero {
    width: fit-content;
    padding-inline: 34px;
    border: 4px solid rgba(255, 255, 255, 0.86);
    box-shadow: var(--shadow);
}

.button--ghost {
    color: var(--text);
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--line);
}

.button--ghost.is-active {
    color: #fff;
    background: var(--blue);
    border-color: var(--blue);
}

.button--danger {
    color: #fff;
    background: var(--danger);
}

.section {
    padding: 84px 0;
}

.section--compact {
    padding-top: 24px;
}

.section__head,
.admin-header,
.subhero__content,
.person-page__topbar {
    display: flex;
    gap: 20px;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.section h2,
.subhero h1,
.person-page h1,
.admin-panel h1,
.admin-header h1 {
    font-size: clamp(2rem, 3.2vw, 3.6rem);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.section-card,
.feature-band,
.toolbar,
.person-card,
.person-hero,
.person-content,
.admin-panel,
.admin-table-wrap,
.editor-grid {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.section-card {
    position: relative;
    overflow: hidden;
    padding: 30px;
    min-height: 320px;
    display: grid;
    align-content: end;
    gap: 16px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.9)),
        linear-gradient(140deg, rgba(31, 173, 227, 0.24), rgba(31, 91, 255, 0.08));
}

.section-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top right, rgba(31, 91, 255, 0.12), transparent 24%),
        radial-gradient(circle at bottom left, rgba(31, 173, 227, 0.2), transparent 28%);
}

.section-card > * {
    position: relative;
    z-index: 1;
}

.section-card__badge,
.person-card__type {
    width: fit-content;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(18, 57, 183, 0.1);
    color: var(--blue-deep);
    font-size: 0.88rem;
    font-weight: 700;
}

.section-card h3 {
    margin: 0;
    font-size: clamp(1.5rem, 2vw, 2rem);
    line-height: 1.2;
}

.section-card p,
.feature-band__list,
.subhero p,
.search-form input,
.person-card p,
.person-hero__headline,
.person-content p,
.admin-panel p,
.form-field span,
.form-field__hint,
.admin-table__sub,
.flash {
    color: var(--muted);
}

.section-card__meta {
    font-weight: 700;
    color: var(--text);
}

.section-card__footer {
    margin-top: auto;
    display: grid;
    gap: 14px;
}

.section-card__action {
    width: fit-content;
    min-height: 52px;
    padding-inline: 22px;
    font-size: 0.98rem;
}

.feature-band {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 32px;
    padding: 32px;
}

.feature-band__list {
    margin: 0;
    padding-left: 24px;
    display: grid;
    gap: 12px;
    font-size: 1.06rem;
    line-height: 1.6;
}

.subhero {
    padding: 42px 0 28px;
}

.subhero__content {
    align-items: flex-start;
}

.subhero p {
    max-width: 780px;
    margin: 14px 0 0;
    font-size: 1.08rem;
    line-height: 1.65;
}

.toolbar {
    position: sticky;
    top: 16px;
    z-index: 10;
    display: grid;
    gap: 20px;
    padding: 22px;
    margin: 28px 0;
}

.search-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 14px;
}

.search-form__field input,
.form-field input,
.form-field textarea,
.form-field select {
    width: 100%;
    min-height: 60px;
    padding: 16px 18px;
    border: 1px solid rgba(25, 70, 132, 0.18);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.9);
    font: inherit;
    color: var(--text);
}

.form-field textarea {
    min-height: auto;
    resize: vertical;
}

.alphabet-nav {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.alphabet-nav__item {
    flex: 0 0 auto;
    width: 54px;
    height: 54px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    background: rgba(17, 33, 62, 0.06);
    font-weight: 700;
}

.alphabet-nav__item.is-active {
    color: #fff;
    background: var(--blue);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.person-card {
    overflow: hidden;
}

.person-card__link {
    display: grid;
    min-height: 100%;
}

.person-card__media {
    aspect-ratio: 5 / 4;
    background: linear-gradient(135deg, rgba(31, 173, 227, 0.2), rgba(31, 91, 255, 0.18));
}

.person-card__media img,
.person-hero__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.person-card__placeholder {
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    min-height: 220px;
    font-family: var(--font-display);
    font-size: clamp(4rem, 10vw, 7rem);
    color: rgba(16, 33, 62, 0.36);
}

.person-card__body {
    display: grid;
    gap: 14px;
    padding: 22px;
}

.person-card h2 {
    margin: 0;
    font-size: 1.5rem;
    line-height: 1.2;
}

.person-card p {
    margin: 0;
    line-height: 1.6;
}

.person-card__cta {
    margin-top: auto;
    width: fit-content;
    min-height: 50px;
    padding-inline: 20px;
}

.person-page {
    padding: 32px 0 64px;
}

.page-presentation {
    padding: 26px 0 56px;
}

.presentation-hero {
    position: relative;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 28px;
    padding: 34px;
    border-radius: var(--radius-xl);
    background:
        linear-gradient(140deg, rgba(10, 30, 68, 0.86), rgba(15, 76, 151, 0.56)),
        var(--hero-image) center/cover no-repeat;
    color: #fff;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.presentation-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top right, rgba(31, 173, 227, 0.26), transparent 20%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(0, 0, 0, 0.18));
}

.presentation-hero > * {
    position: relative;
    z-index: 1;
}

.presentation-hero p {
    max-width: 780px;
    margin: 16px 0 0;
    font-size: 1.08rem;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.84);
}

.presentation-hero--overview {
    background:
        linear-gradient(140deg, rgba(10, 30, 68, 0.92), rgba(15, 76, 151, 0.62)),
        url("/presentation_asset.php?file=tild3330-3534-4330-b630-313334626262__2024-08-02_bgtu-shuk.jpg") center/cover no-repeat;
}

.presentation-hero__facts,
.presentation-hero__actions {
    display: grid;
    align-content: start;
    gap: 16px;
}

.presentation-viewer {
    margin-top: 24px;
    padding: 24px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.presentation-viewer__stage {
    display: grid;
    gap: 18px;
}

.presentation-viewer__stage img {
    width: 100%;
    max-height: 76vh;
    object-fit: contain;
    border-radius: var(--radius-lg);
    background: #dfe9f6;
}

.presentation-viewer__stage:fullscreen,
.presentation-viewer__stage:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
    padding: 24px;
    align-content: stretch;
    background:
        radial-gradient(circle at top right, rgba(31, 173, 227, 0.14), transparent 18%),
        linear-gradient(180deg, #f8fbff 0%, #dfe9f6 100%);
}

.presentation-viewer__stage:fullscreen img,
.presentation-viewer__stage:-webkit-full-screen img {
    height: calc(100vh - 120px);
    max-height: calc(100vh - 120px);
    border-radius: 20px;
}

.presentation-viewer__stage:fullscreen .presentation-viewer__controls,
.presentation-viewer__stage:-webkit-full-screen .presentation-viewer__controls {
    align-self: end;
}

.presentation-viewer__stage:fullscreen [data-slide-fullscreen],
.presentation-viewer__stage:-webkit-full-screen [data-slide-fullscreen] {
    display: none;
}

.presentation-viewer__stage.is-fullscreen [data-slide-fullscreen] {
    display: none;
}

.presentation-viewer__controls {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.presentation-viewer__counter {
    min-width: 110px;
    text-align: center;
    font-weight: 700;
    color: var(--text);
}

[data-slide-exit] {
    display: none;
}

.presentation-viewer__stage.is-fullscreen [data-slide-exit],
.presentation-viewer__stage:fullscreen [data-slide-exit],
.presentation-viewer__stage:-webkit-full-screen [data-slide-exit] {
    display: inline-flex;
}

.presentation-viewer__thumbs {
    margin-top: 22px;
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
    max-height: 420px;
    overflow-y: auto;
    padding-right: 4px;
}

.presentation-thumb {
    display: grid;
    gap: 8px;
    padding: 10px;
    border: 1px solid rgba(25, 70, 132, 0.14);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.9);
    cursor: pointer;
}

.presentation-thumb.is-active {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(31, 91, 255, 0.12);
}

.presentation-thumb img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: 12px;
    background: #e8eef7;
}

.presentation-thumb span {
    font-weight: 700;
    color: var(--text);
}

.person-page__topbar {
    margin-bottom: 24px;
}

.person-hero {
    display: grid;
    grid-template-columns: minmax(280px, 0.9fr) 1.3fr;
    gap: 30px;
    padding: 28px;
}

.person-hero__media {
    min-height: 420px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(135deg, rgba(31, 173, 227, 0.2), rgba(31, 91, 255, 0.18));
}

.person-hero__content {
    display: grid;
    align-content: center;
    gap: 18px;
}

.person-hero__eyebrow {
    font-weight: 700;
    color: var(--blue);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.person-hero__headline {
    margin: 0;
    font-size: 1.16rem;
    line-height: 1.7;
}

.person-fact {
    display: grid;
    gap: 8px;
    padding: 18px;
    border-radius: var(--radius-md);
    background: rgba(17, 33, 62, 0.05);
}

.person-fact span {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--blue);
}

.presentation-hero .person-fact span {
    color: rgba(255, 255, 255, 0.8);
}

.presentation-hero .person-fact strong {
    color: #ffffff;
}

.person-content {
    margin-top: 24px;
    padding: 28px;
}

.person-content p {
    margin: 0 0 18px;
    font-size: 1.06rem;
    line-height: 1.85;
}

.person-content__actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 30px;
    padding-top: 12px;
}

.empty-state {
    padding: 54px 24px;
    text-align: center;
}

.catalog-actions {
    display: flex;
    justify-content: center;
    margin-top: 28px;
}

.admin-login,
.admin-shell {
    padding: 32px 0 64px;
}

.admin-panel {
    width: min(560px, 100%);
    margin: 0 auto;
    display: grid;
    gap: 18px;
    padding: 34px;
}

.admin-panel--compact {
    width: 100%;
    margin: 0 0 22px;
}

.flash {
    padding: 16px 18px;
    border-radius: 18px;
    border: 1px solid var(--line);
    margin-bottom: 16px;
}

.flash--success {
    background: rgba(31, 173, 227, 0.12);
    color: #115a73;
}

.flash--error {
    background: rgba(184, 50, 75, 0.08);
    color: #92283b;
}

.admin-header__actions,
.admin-filters,
.editor-grid__actions,
.admin-table__actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.admin-table-wrap,
.editor-grid {
    padding: 22px;
    margin-top: 20px;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: 16px 12px;
    border-bottom: 1px solid rgba(25, 70, 132, 0.12);
    text-align: left;
    vertical-align: top;
}

.admin-table__sub {
    margin-top: 8px;
}

.admin-preview-cell {
    width: 132px;
}

.admin-preview {
    display: block;
    width: 108px;
    height: 72px;
    object-fit: cover;
    border-radius: 10px;
    background: #e8eef7;
}

.admin-preview--large {
    margin-top: 10px;
    width: 260px;
    height: 160px;
    border-radius: 14px;
}

.editor-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.form-field {
    display: grid;
    gap: 8px;
}

.form-field--wide,
.toggle-field,
.editor-grid__actions {
    grid-column: 1 / -1;
}

.form-field span,
.toggle-field span {
    font-size: 0.94rem;
    font-weight: 700;
}

.toggle-field {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toggle-field input {
    width: 20px;
    height: 20px;
}

@media (max-width: 1100px) {
    .cards-grid,
    .catalog-grid,
    .person-hero,
    .feature-band,
    .presentation-hero,
    .editor-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 860px) {
    .shell {
        width: min(100vw - 24px, 1360px);
    }

    .search-form {
        grid-template-columns: 1fr;
    }

    .presentation-viewer__thumbs {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .admin-table-wrap {
        overflow-x: auto;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 54px 0;
    }

    .hero__content {
        padding: 40px 0;
    }

    .toolbar,
    .person-hero,
    .person-content,
    .presentation-viewer,
    .admin-panel,
    .admin-table-wrap,
    .editor-grid {
        border-radius: 24px;
    }

    .alphabet-nav__item {
        width: 48px;
        height: 48px;
    }

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