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

:root {
    --bg: #f3f7fb;
    --surface: #ffffff;
    --surface-soft: #e7eef9;
    --text: #11233b;
    --muted: #49617f;
    --primary: #0057b8;
    --primary-soft: #d8e8ff;
    --border: #d9e3f0;
    --shadow: 0 14px 35px rgba(7, 35, 77, 0.14);
    --glass-bg: rgba(255, 255, 255, 0.62);
    --glass-border: rgba(255, 255, 255, 0.55);
    --glass-bg-strong: rgba(255, 255, 255, 0.78);
    --glass-shadow: 0 16px 36px rgba(7, 35, 77, 0.16);
}

body.dark {
    --bg: #0d1a2a;
    --surface: #16283d;
    --surface-soft: #1c314a;
    --text: #e7f1ff;
    --muted: #a8c0dc;
    --primary: #66a8ff;
    --primary-soft: #25466e;
    --border: #25466e;
    --shadow: 0 16px 34px rgba(0, 0, 0, 0.35);
    --glass-bg: rgba(18, 35, 58, 0.62);
    --glass-border: rgba(128, 170, 220, 0.32);
    --glass-bg-strong: rgba(19, 36, 59, 0.78);
    --glass-shadow: 0 20px 38px rgba(0, 0, 0, 0.34);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Outfit", sans-serif;
    background:
        radial-gradient(circle at 0% 0%, rgba(0, 87, 184, 0.13), transparent 40%),
        radial-gradient(circle at 100% 100%, rgba(249, 192, 0, 0.15), transparent 35%),
        var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    width: min(1120px, 92%);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(14px) saturate(160%);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    border-bottom: 1px solid var(--glass-border);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.33), rgba(255, 255, 255, 0.1)),
        var(--glass-bg);
    box-shadow: var(--glass-shadow);
}

.nav-wrap {
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
}

.brand img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--primary);
}

.brand .logo-dark {
    display: none;
}

body.dark .brand .logo-light {
    display: none;
}

body.dark .brand .logo-dark {
    display: block;
}

.brand h1 {
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.08rem;
    line-height: 1.1;
}

.brand p {
    color: var(--muted);
    font-size: 0.8rem;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 18px;
}

.menu-btn {
    display: none;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg-strong);
    color: var(--text);
    border-radius: 10px;
    padding: 8px 12px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.main-nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    opacity: 0.92;
    padding: 7px 10px;
    border-radius: 10px;
    border: 1px solid transparent;
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.main-nav a:hover {
    color: var(--primary);
    background: color-mix(in srgb, var(--glass-bg-strong) 86%, transparent);
    border-color: color-mix(in srgb, var(--glass-border) 80%, transparent);
}

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

.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--glass-bg-strong);
    border-radius: 999px;
    padding: 4px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.lang-btn {
    border: 0;
    width: 36px;
    height: 36px;
    border-radius: 999px;
    background: transparent;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.lang-btn .flag {
    font-size: 1.08rem;
    line-height: 1;
}

.lang-btn.active {
    background: color-mix(in srgb, var(--primary-soft) 80%, var(--glass-bg));
    box-shadow: inset 0 0 0 1px var(--primary), 0 6px 12px rgba(5, 41, 86, 0.2);
    transform: scale(1.12);
}

.theme-toggle {
    position: relative;
    display: inline-flex;
}

.theme-toggle input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    width: 54px;
    height: 30px;
    border-radius: 999px;
    background: linear-gradient(135deg, #8bbcff, #ffcf4d);
    border: 1px solid var(--glass-border);
    position: relative;
    cursor: pointer;
}

.slider::after {
    content: "";
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #ffffff;
    transition: transform 0.25s ease;
}

.theme-toggle input:checked + .slider::after {
    transform: translateX(24px);
}

.hero {
    padding: 64px 0 28px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 36px;
    align-items: center;
}

.hero-pill {
    display: inline-block;
    background: color-mix(in srgb, var(--primary-soft) 78%, var(--glass-bg));
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.hero h2 {
    font-family: "Space Grotesk", sans-serif;
    font-size: clamp(1.7rem, 3vw, 2.8rem);
    line-height: 1.15;
    margin-bottom: 12px;
}

.hero-content > p {
    color: var(--muted);
    max-width: 60ch;
}

.hero-content {
    background:
        linear-gradient(150deg, rgba(255, 255, 255, 0.36), rgba(255, 255, 255, 0.08)),
        var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 22px;
    padding: 24px;
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(12px) saturate(150%);
    -webkit-backdrop-filter: blur(12px) saturate(150%);
}

.hero-actions {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.hero-stats {
    margin-top: 18px;
}

.btn {
    text-decoration: none;
    border: 0;
    font-family: inherit;
    font-weight: 600;
    border-radius: 12px;
    padding: 10px 16px;
    cursor: pointer;
}

.btn.primary {
    background:
        linear-gradient(140deg, color-mix(in srgb, var(--primary) 80%, #fff 20%), var(--primary));
    border: 1px solid color-mix(in srgb, var(--primary) 60%, #ffffff 40%);
    color: #fff;
    box-shadow: 0 10px 20px rgba(0, 87, 184, 0.28);
}

.btn.ghost {
    border: 1px solid var(--glass-border);
    background: var(--glass-bg-strong);
    color: var(--text);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.hero-image-wrap {
    display: flex;
    justify-content: center;
}

.oval-image {
    border-radius: 44% 56% 52% 48% / 45% 40% 60% 55%;
    border: 4px solid var(--primary);
    box-shadow: var(--glass-shadow);
    object-fit: cover;
}

.hero-image {
    width: min(420px, 85%);
    aspect-ratio: 1 / 1;
    padding: 18px;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.section {
    padding: 60px 0;
}

.section.alt {
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0.06)),
        color-mix(in srgb, var(--glass-bg) 60%, transparent);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.section h3 {
    font-family: "Space Grotesk", sans-serif;
    font-size: clamp(1.5rem, 2vw, 2rem);
    margin-bottom: 10px;
}

.section-subtitle {
    color: var(--muted);
    margin-bottom: 22px;
}

.section-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 28px;
    align-items: center;
}

.about-image-wrap {
    display: flex;
    justify-content: center;
}

.about-image-wrap .oval-image {
    width: min(360px, 90%);
    aspect-ratio: 1 / 1;
    padding: 14px;
    background: var(--glass-bg-strong);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(110px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.stats article {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    padding: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
}

.stats strong {
    display: block;
    font-size: 1.45rem;
    color: var(--primary);
}

.stats span {
    color: var(--muted);
    font-size: 0.88rem;
}

.teachers-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(210px, 1fr));
    gap: 18px;
}

.teacher-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 16px;
    text-align: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
}

.teacher-photo {
    width: 104px;
    height: 104px;
    margin-bottom: 12px;
}

.teacher-card h4 {
    font-size: 1.05rem;
}

.teacher-card p {
    color: var(--muted);
    font-size: 0.92rem;
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(220px, 1fr));
    gap: 16px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(140px, 1fr));
    gap: 14px;
}

.gallery-item {
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    box-shadow: var(--glass-shadow);
    min-height: 140px;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.quick-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 16px;
    display: grid;
    gap: 10px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
}

.leader-grid .leader-card {
    text-align: center;
}

.leader-card small {
    color: var(--muted);
    font-weight: 600;
}

.page-hero h2 {
    font-family: "Space Grotesk", sans-serif;
    font-size: clamp(1.7rem, 2.8vw, 2.5rem);
    line-height: 1.2;
    margin-bottom: 10px;
}

.page-hero p {
    color: var(--muted);
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 18px;
    margin-bottom: 20px;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(220px, 1fr));
    gap: 16px;
}

.news-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
}

.news-card h4 {
    margin-bottom: 8px;
}

.news-card p {
    color: var(--muted);
    font-size: 0.95rem;
}

.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
}

.contact-list {
    list-style: none;
    margin-top: 14px;
}

.contact-list li {
    margin-bottom: 9px;
}

.contact-form {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    padding: 16px;
    display: grid;
    gap: 12px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--glass-shadow);
}

.contact-form label span {
    display: inline-block;
    margin-bottom: 6px;
    font-weight: 500;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 10px 12px;
    font: inherit;
    background: color-mix(in srgb, var(--glass-bg-strong) 90%, transparent);
    color: var(--text);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.hp-field {
    position: absolute;
    left: -9999px;
    opacity: 0;
    pointer-events: none;
}

.form-status {
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 8px 10px;
    font-weight: 600;
}

.form-status.success {
    color: #0f7c3a;
    background: rgba(75, 255, 130, 0.16);
}

.form-status.error {
    color: #b42a2a;
    background: rgba(255, 96, 96, 0.15);
}

.contact-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(180px, 1fr));
    gap: 16px;
}

.site-footer {
    padding: 18px 0 28px;
    text-align: center;
    color: var(--muted);
    border-top: 1px solid var(--glass-border);
    background:
        linear-gradient(160deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.06)),
        color-mix(in srgb, var(--glass-bg) 62%, transparent);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

@media (max-width: 980px) {
    .nav-wrap {
        flex-wrap: wrap;
        padding: 10px 0;
    }

    .menu-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .main-nav {
        display: flex;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        padding: 10px;
        border: 1px solid var(--glass-border);
        border-radius: 16px;
        background:
            linear-gradient(140deg, rgba(255, 255, 255, 0.35), rgba(255, 255, 255, 0.1)),
            var(--glass-bg);
        backdrop-filter: blur(14px) saturate(165%);
        -webkit-backdrop-filter: blur(14px) saturate(165%);
        box-shadow: 0 18px 32px rgba(8, 25, 52, 0.18);
        overflow: hidden;
        max-height: 0;
        opacity: 0;
        transform: translateY(-16px) scale(0.98);
        transform-origin: top center;
        pointer-events: none;
        transition:
            max-height 0.45s cubic-bezier(0.2, 0.75, 0.22, 1),
            opacity 0.28s ease,
            transform 0.45s cubic-bezier(0.2, 0.75, 0.22, 1);
    }

    body.nav-open .main-nav {
        max-height: 380px;
        opacity: 1;
        transform: translateY(0) scale(1);
        pointer-events: auto;
    }

    .main-nav a {
        padding: 8px 10px;
        border-radius: 8px;
        background: color-mix(in srgb, var(--surface-soft) 64%, transparent);
        border: 1px solid color-mix(in srgb, var(--glass-border) 70%, transparent);
        transform: translateY(-6px);
        opacity: 0;
        transition: transform 0.28s ease, opacity 0.28s ease;
    }

    body.nav-open .main-nav a {
        transform: translateY(0);
        opacity: 1;
    }

    body.nav-open .main-nav a:nth-child(1) { transition-delay: 0.03s; }
    body.nav-open .main-nav a:nth-child(2) { transition-delay: 0.07s; }
    body.nav-open .main-nav a:nth-child(3) { transition-delay: 0.11s; }
    body.nav-open .main-nav a:nth-child(4) { transition-delay: 0.15s; }
    body.nav-open .main-nav a:nth-child(5) { transition-delay: 0.19s; }

    .hero-grid,
    .section-grid,
    .contact-wrap {
        grid-template-columns: 1fr;
    }

    .hero-image-wrap {
        order: -1;
    }

    .teachers-grid,
    .news-grid,
    .quick-grid,
    .gallery-grid {
        grid-template-columns: repeat(2, minmax(180px, 1fr));
    }

    .contact-strip {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .nav-wrap {
        padding: 8px 0;
        gap: 8px;
    }

    .brand {
        width: auto;
        justify-content: flex-start;
        gap: 8px;
    }

    .brand img {
        width: 40px;
        height: 40px;
    }

    .brand h1 {
        font-size: 0.95rem;
    }

    .brand p {
        display: none;
    }

    .controls {
        width: auto;
        gap: 8px;
    }

    .lang-switch {
        gap: 4px;
        padding: 3px;
    }

    .lang-btn {
        width: 30px;
        height: 30px;
    }

    .lang-btn .flag {
        font-size: 0.95rem;
    }

    .slider {
        width: 44px;
        height: 24px;
    }

    .slider::after {
        top: 3px;
        left: 3px;
        width: 16px;
        height: 16px;
    }

    .theme-toggle input:checked + .slider::after {
        transform: translateX(20px);
    }

    .menu-btn {
        padding: 6px 10px;
        font-size: 0.88rem;
    }

    .section {
        padding: 48px 0;
    }

    .stats,
    .teachers-grid,
    .news-grid,
    .quick-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .section-head {
        flex-direction: column;
        align-items: start;
    }
}