/* ===== ПЕРЕМЕННЫЕ ТЕМ ===== */
:root {
    --primary: #FF8C00;
    --primary-dark: #E85D00;
    --primary-light: #FFB347;
    --bg: linear-gradient(135deg, #FF8C00 0%, #FF6B00 50%, #E85D00 100%);
    --card-bg: rgba(255, 255, 255, 0.15);
    --card-border: rgba(255, 255, 255, 0.25);
    --text: #FFFFFF;
    --text-dim: rgba(255, 255, 255, 0.75);
    --shadow: rgba(0, 0, 0, 0.2);
    --accent: #2D1B00;
}

[data-theme="dark"] {
    --primary: #FF8C00;
    --primary-dark: #E85D00;
    --primary-light: #FFB347;
    --bg: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
    --card-bg: rgba(255, 255, 255, 0.08);
    --card-border: rgba(255, 255, 255, 0.15);
    --text: #FFFFFF;
    --text-dim: rgba(255, 255, 255, 0.6);
    --shadow: rgba(0, 0, 0, 0.5);
    --accent: #FF8C00;
}

[data-theme="light"] {
    --primary: #FF8C00;
    --primary-dark: #E85D00;
    --primary-light: #FFB347;
    --bg: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 140, 0, 0.3);
    --text: #2D1B00;
    --text-dim: rgba(45, 27, 0, 0.65);
    --shadow: rgba(255, 140, 0, 0.2);
    --accent: #E85D00;
}

[data-theme="blue"] {
    --primary: #2196F3;
    --primary-dark: #1769AA;
    --primary-light: #64B5F6;
    --bg: linear-gradient(135deg, #2196F3 0%, #1769AA 100%);
    --card-bg: rgba(255, 255, 255, 0.15);
    --card-border: rgba(255, 255, 255, 0.25);
    --text: #FFFFFF;
    --text-dim: rgba(255, 255, 255, 0.75);
    --shadow: rgba(0, 0, 0, 0.2);
    --accent: #0D47A1;
}

[data-theme="green"] {
    --primary: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #81C784;
    --bg: linear-gradient(135deg, #4CAF50 0%, #2E7D32 100%);
    --card-bg: rgba(255, 255, 255, 0.15);
    --card-border: rgba(255, 255, 255, 0.25);
    --text: #FFFFFF;
    --text-dim: rgba(255, 255, 255, 0.75);
    --shadow: rgba(0, 0, 0, 0.2);
    --accent: #1B5E20;
}

[data-theme="fish"] {
    --primary: #00BCD4;
    --primary-dark: #0097A7;
    --primary-light: #4DD0E1;
    --bg: linear-gradient(180deg, #006064 0%, #00838F 30%, #00ACC1 70%, #26C6DA 100%);
    --card-bg: rgba(255, 255, 255, 0.12);
    --card-border: rgba(255, 255, 255, 0.25);
    --text: #FFFFFF;
    --text-dim: rgba(255, 255, 255, 0.75);
    --shadow: rgba(0, 0, 0, 0.3);
    --accent: #00E5FF;
}

/* ===== БАЗОВЫЕ СТИЛИ ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    background-size: 200% 200%;
    animation: gradientShift 12s ease infinite;
    min-height: 100vh;
    color: var(--text);
    padding: 20px;
    transition: background 0.5s ease, color 0.3s ease;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ===== ШАПКА ===== */
.header {
    max-width: 900px;
    margin: 0 auto 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    animation: slideDown 0.6s ease-out;
    position: relative;
    z-index: 1;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.logo {
    font-size: 26px;
    font-weight: 900;
    letter-spacing: -1px;
    color: var(--text);
    text-decoration: none;
}

.logo span { color: var(--accent); }

.nav {
    display: flex;
    gap: 10px;
    align-items: center;
}

.nav a {
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--card-border);
    transition: background 0.3s, transform 0.3s;
}

.nav a:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.settings-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid var(--card-border);
    color: var(--text);
    font-size: 18px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.3s, background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(45deg);
}

/* ===== МОДАЛЬНОЕ ОКНО ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.modal-overlay.active { display: flex; }

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 30px;
    max-width: 400px;
    width: 100%;
    animation: popIn 0.4s ease-out;
}

@keyframes popIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.modal h2 {
    font-size: 22px;
    margin-bottom: 20px;
    text-align: center;
}

.theme-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.theme-option {
    padding: 15px;
    border-radius: 15px;
    border: 2px solid var(--card-border);
    cursor: pointer;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    transition: transform 0.3s, border-color 0.3s;
}

.theme-option:hover { transform: scale(1.05); }
.theme-option.active { border-color: #fff; border-width: 3px; }

.theme-orange { background: linear-gradient(135deg, #FF8C00, #E85D00); }
.theme-dark { background: linear-gradient(135deg, #2a2a2a, #0d0d0d); }
.theme-light { background: linear-gradient(135deg, #FFF3E0, #FFE0B2); color: #2D1B00; }
.theme-blue { background: linear-gradient(135deg, #2196F3, #1769AA); }
.theme-green { background: linear-gradient(135deg, #4CAF50, #2E7D32); }
.theme-fish { background: linear-gradient(135deg, #00BCD4, #006064); }

.close-btn {
    width: 100%;
    padding: 12px;
    border-radius: 50px;
    border: none;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
}

.close-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.02);
}

/* ===== КОНТЕЙНЕР ===== */
.container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* ===== КАРТОЧКИ ===== */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 25px;
    margin-bottom: 20px;
    animation: popIn 0.6s ease-out both;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px var(--shadow);
}

.card h2 {
    font-size: 20px;
    margin-bottom: 12px;
}

.card p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-dim);
}

/* ===== СЕТКА ПЛИТОК ===== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.tile {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    padding: 22px;
    text-decoration: none;
    color: var(--text);
    transition: transform 0.3s, background 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    gap: 8px;
    animation: popIn 0.6s ease-out both;
}

.tile:hover {
    transform: translateY(-5px) scale(1.02);
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 15px 40px var(--shadow);
}

.tile-icon { font-size: 32px; }
.tile-title { font-size: 17px; font-weight: 700; }
.tile-desc { font-size: 13px; color: var(--text-dim); }

/* ===== ФУТЕР ===== */
.footer {
    text-align: center;
    margin-top: 40px;
    font-size: 13px;
    color: var(--text-dim);
    animation: fadeIn 1s ease-out 0.5s both;
    position: relative;
    z-index: 1;
}

.footer a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--text-dim);
}

/* ===== АКВАРИУМ ===== */
.aquarium {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

[data-theme="fish"] .aquarium {
    display: block;
}

.fish {
    position: absolute;
    font-size: 32px;
    opacity: 0.6;
    animation: swim linear infinite;
}

.fish:nth-child(1) { top: 15%; animation-duration: 18s; animation-delay: 0s; font-size: 36px; }
.fish:nth-child(2) { top: 35%; animation-duration: 24s; animation-delay: 3s; font-size: 28px; }
.fish:nth-child(3) { top: 55%; animation-duration: 20s; animation-delay: 6s; font-size: 40px; }
.fish:nth-child(4) { top: 75%; animation-duration: 28s; animation-delay: 2s; font-size: 30px; }
.fish:nth-child(5) { top: 25%; animation-duration: 22s; animation-delay: 8s; font-size: 34px; }
.fish:nth-child(6) { top: 65%; animation-duration: 26s; animation-delay: 5s; font-size: 26px; }

@keyframes swim {
    0% { left: -80px; transform: scaleX(1); }
    49% { transform: scaleX(1); }
    50% { left: 100%; transform: scaleX(-1); }
    99% { transform: scaleX(-1); }
    100% { left: -80px; transform: scaleX(1); }
}

.bubble-fish {
    position: absolute;
    bottom: -30px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.5);
    animation: rise linear infinite;
}

.bubble-fish:nth-child(7) { left: 10%; animation-duration: 8s; animation-delay: 0s; }
.bubble-fish:nth-child(8) { left: 25%; animation-duration: 11s; animation-delay: 2s; width: 8px; height: 8px; }
.bubble-fish:nth-child(9) { left: 45%; animation-duration: 9s; animation-delay: 4s; width: 14px; height: 14px; }
.bubble-fish:nth-child(10) { left: 65%; animation-duration: 12s; animation-delay: 1s; }
.bubble-fish:nth-child(11) { left: 80%; animation-duration: 10s; animation-delay: 3s; width: 10px; height: 10px; }
.bubble-fish:nth-child(12) { left: 92%; animation-duration: 13s; animation-delay: 5s; width: 16px; height: 16px; }

@keyframes rise {
    0% { bottom: -30px; opacity: 0; transform: translateX(0); }
    10% { opacity: 0.8; }
    50% { transform: translateX(20px); }
    90% { opacity: 0.8; }
    100% { bottom: 100%; opacity: 0; transform: translateX(-10px); }
}

/* ===== АДАПТИВ ===== */
@media (max-width: 600px) {
    body { padding: 15px; }

    .header {
        padding: 12px 15px;
        flex-wrap: wrap;
        gap: 10px;
    }

    .logo { font-size: 22px; }

    .nav a {
        font-size: 12px;
        padding: 6px 12px;
    }

    .card { padding: 20px; }
    .card h2 { font-size: 17px; }
    .card p { font-size: 14px; }

    .grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .tile { padding: 16px; }
    .tile-icon { font-size: 26px; }
    .tile-title { font-size: 14px; }
    .tile-desc { font-size: 11px; }

    .theme-grid { grid-template-columns: repeat(2, 1fr); }
    .modal { padding: 20px; }

    .fish { font-size: 22px !important; }
}

@media (max-width: 360px) {
    .grid { grid-template-columns: 1fr; }
    .logo { font-size: 20px; }
}