:root {
    --primary: #36f2b4;
    --primary-dark: #12b886;
    --primary-glow: rgba(54, 242, 180, 0.22);
    --secondary: #7c8cff;
    --secondary-glow: rgba(124, 140, 255, 0.18);
    --accent: #ff7a90;
    --bg-primary: #090b10;
    --bg-secondary: #10141d;
    --bg-card: #151a24;
    --bg-card-hover: #1b2230;
    --text-primary: #f7f8fb;
    --text-secondary: #c4c9d4;
    --text-muted: #848b99;
    --border-light: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(54, 242, 180, 0.28);
    --glass-bg: rgba(18, 23, 33, 0.72);
    --glass-border: rgba(255, 255, 255, 0.12);
    --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.22);
    --shadow-md: 0 16px 36px rgba(0, 0, 0, 0.28);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.34);
    --shadow-glow: 0 18px 42px rgba(54, 242, 180, 0.16);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 8px;
    --radius-xl: 8px;
}

html {
    color-scheme: dark;
}

body {
    background:
        linear-gradient(180deg, rgba(124, 140, 255, 0.08), transparent 360px),
        var(--bg-primary);
}

a,
button,
input,
select,
textarea {
    -webkit-tap-highlight-color: transparent;
}

.navbar {
    background: rgba(9, 11, 16, 0.82);
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    padding: 0.85rem 0;
}

.navbar.scrolled {
    background: rgba(9, 11, 16, 0.94);
}

.logo h2,
.logo {
    letter-spacing: 0;
}

.nav-links {
    gap: 0.35rem;
    align-items: center;
}

.nav-links a {
    border-radius: 999px;
    padding: 0.62rem 0.9rem;
}

.nav-links a::after {
    display: none;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.login-btn {
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
}

.hero,
.auth-page,
.trending-hero {
    background:
        linear-gradient(120deg, rgba(9, 11, 16, 0.7), rgba(9, 11, 16, 0.94)),
        url("https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?auto=format&fit=crop&w=1800&q=80") center / cover;
}

.hero::before,
.auth-page::before {
    display: none;
}

.hero {
    min-height: 84vh;
    padding: 7rem 1rem 4rem;
}

.hero-content {
    width: min(980px, calc(100% - 2rem));
}

.hero-content h1 {
    font-size: clamp(2.35rem, 6vw, 5rem);
    line-height: 1.08;
    margin-bottom: 1rem;
}

.hero-content p,
.hero-copy p {
    color: #d7dce7;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
}

.search-container {
    max-width: 720px;
}

.search-container input,
.form-group input,
.form-group select,
.form-group textarea,
.input-group input {
    border-radius: var(--radius-md);
    background: rgba(12, 16, 24, 0.84);
}

.search-container input {
    padding-left: 8.5rem;
    min-height: 64px;
}

.search-container button,
.btn-primary,
.btn-outline,
.auth-btn,
.trending-tab,
.pagination button {
    border-radius: var(--radius-md);
}

.btn-primary,
.auth-btn,
.search-container button,
.trending-tab.active,
.trending-tab:hover {
    color: #06100c;
    background: linear-gradient(135deg, var(--primary), #9fffcf);
}

.btn-outline {
    border-color: var(--glass-border);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(54, 242, 180, 0.12);
    color: var(--primary);
}

.section {
    padding: 4.2rem 0;
}

.section-header {
    gap: 1rem;
}

.section-header h2,
.trend-toolbar h2 {
    font-size: clamp(1.35rem, 3vw, 2rem);
}

.wallpapers-grid,
.trending-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.wallpaper-card,
.cat-card,
.device-card,
.auth-card,
.trend-panel,
.stat-card-trend,
.modal-content,
.loading-state,
.empty-state {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.wallpaper-card:hover,
.cat-card:hover,
.device-card:hover,
.stat-card-trend:hover {
    transform: translateY(-4px);
}

.card-overlay {
    opacity: 1;
}

.quality-badge,
.ranking-number {
    border-radius: var(--radius-sm);
}

.favorite-icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.48);
}

.auth-page {
    padding: 7rem 1rem 3rem;
}

.auth-card {
    background: rgba(16, 20, 29, 0.92);
}

.toast {
    left: 24px;
    right: auto;
    border-right: 0;
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-md);
    transform: translateX(-150%);
}

.toast.show {
    transform: translateX(0);
}

@media (max-width: 900px) {
    .mobile-menu {
        display: grid;
        place-items: center;
        width: 42px;
        height: 42px;
        border: 1px solid var(--glass-border);
        border-radius: var(--radius-md);
        background: rgba(255, 255, 255, 0.06);
        cursor: pointer;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 16px;
        right: 16px;
        display: none;
        grid-template-columns: 1fr;
        gap: 0.35rem;
        padding: 0.75rem;
        background: rgba(13, 17, 25, 0.96);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.show {
        display: grid;
    }

    .nav-links a {
        display: flex;
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        min-height: 76vh;
        padding-top: 6rem;
    }

    .search-container input {
        min-height: 58px;
        padding: 1rem;
        padding-left: 5.8rem;
    }

    .search-container button {
        padding: 0.65rem 0.85rem;
    }

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

    .wallpapers-grid,
    .trending-grid {
        grid-template-columns: 1fr;
    }

    .toast {
        left: 16px;
        right: 16px;
    }
}