/* ============================================
   GRAMVIBE - PREMIUM DESIGN SYSTEM
   Версия: 2.0 (Богатый дизайн)
   ============================================ */

/* --- ПЕРЕМЕННЫЕ ТЕМ --- */
:root {
    /* Основные цвета */
    --primary: #93C572;
    --primary-light: #A8D585;
    --primary-dark: #76A358;
    --primary-rgb: 147, 197, 114;
    --primary-gradient: linear-gradient(135deg, #93C572 0%, #76A358 50%, #5A8A3F 100%);
    --primary-gradient-hover: linear-gradient(135deg, #A8D585 0%, #93C572 50%, #76A358 100%);
    --primary-glow: 0 0 30px rgba(147, 197, 114, 0.5);
    
    /* Акцентные цвета */
    --accent: #FFD700;
    --accent-rgb: 255, 215, 0;
    --accent-gradient: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    
    /* Фоны */
    --bg-body: #F4F7F6;
    --bg-body-gradient: linear-gradient(135deg, #F4F7F6 0%, #E8F0EC 100%);
    --bg-card: #FFFFFF;
    --bg-card-hover: #FAFFFE;
    --bg-glass: rgba(255, 255, 255, 0.75);
    --bg-glass-strong: rgba(255, 255, 255, 0.9);
    --bg-elevated: #FFFFFF;
    
    /* Текст */
    --text-main: #1A2E1F;
    --text-secondary: #5A6B5F;
    --text-muted: #95A5A6;
    --text-light: #B0BEC5;
    
    /* Границы */
    --border: rgba(147, 197, 114, 0.15);
    --border-light: rgba(147, 197, 114, 0.08);
    --border-strong: rgba(147, 197, 114, 0.3);
    
    /* Радиусы */
    --border-radius: 24px;
    --border-radius-sm: 12px;
    --border-radius-lg: 32px;
    
    /* Тени (многослойные для глубины) */
    --shadow-xs: 0 2px 8px rgba(147, 197, 114, 0.08);
    --shadow-sm: 0 4px 16px rgba(147, 197, 114, 0.12);
    --shadow-md: 0 8px 32px rgba(147, 197, 114, 0.15);
    --shadow-lg: 0 16px 48px rgba(147, 197, 114, 0.2);
    --shadow-xl: 0 24px 64px rgba(147, 197, 114, 0.25);
    --shadow-glow: 0 0 40px rgba(147, 197, 114, 0.4);
    --shadow-inner: inset 0 2px 8px rgba(0, 0, 0, 0.05);
    
    /* Переходы */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --sidebar-width: 280px;
}

/* --- ТЕМНАЯ ТЕМА --- */
[data-theme="dark"] {
    --primary: #BB86FC;
    --primary-light: #D4A5FF;
    --primary-dark: #9B59E0;
    --primary-rgb: 187, 134, 252;
    --primary-gradient: linear-gradient(135deg, #BB86FC 0%, #9B59E0 50%, #7B3FC0 100%);
    --primary-gradient-hover: linear-gradient(135deg, #D4A5FF 0%, #BB86FC 50%, #9B59E0 100%);
    --primary-glow: 0 0 30px rgba(187, 134, 252, 0.6);
    
    --bg-body: #0F0F14;
    --bg-body-gradient: linear-gradient(135deg, #0F0F14 0%, #1A1A22 100%);
    --bg-card: #1A1A22;
    --bg-card-hover: #22222C;
    --bg-glass: rgba(26, 26, 34, 0.75);
    --bg-glass-strong: rgba(26, 26, 34, 0.9);
    --bg-elevated: #22222C;
    
    --text-main: #F0F0F5;
    --text-secondary: #B0B0C0;
    --text-muted: #707080;
    
    --border: rgba(187, 134, 252, 0.15);
    --border-light: rgba(187, 134, 252, 0.08);
    --border-strong: rgba(187, 134, 252, 0.3);
    
    --shadow-xs: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.7);
}

/* --- ОКЕАН --- */
[data-theme="ocean"] {
    --primary: #00B4D8;
    --primary-light: #48CAE4;
    --primary-dark: #0077B6;
    --primary-rgb: 0, 180, 216;
    --primary-gradient: linear-gradient(135deg, #00B4D8 0%, #0077B6 50%, #005A8C 100%);
    --primary-gradient-hover: linear-gradient(135deg, #48CAE4 0%, #00B4D8 50%, #0077B6 100%);
    --primary-glow: 0 0 30px rgba(0, 180, 216, 0.5);
    
    --bg-body: #E8F4F8;
    --bg-body-gradient: linear-gradient(135deg, #E8F4F8 0%, #D0E8F0 100%);
    --bg-card: #FFFFFF;
    --bg-card-hover: #F8FCFD;
    
    --border: rgba(0, 180, 216, 0.15);
    --border-light: rgba(0, 180, 216, 0.08);
    --border-strong: rgba(0, 180, 216, 0.3);
}

/* --- КИБЕРПАНК --- */
[data-theme="cyber"] {
    --primary: #F72585;
    --primary-light: #FF4DA6;
    --primary-dark: #B5179E;
    --primary-rgb: 247, 37, 133;
    --primary-gradient: linear-gradient(135deg, #F72585 0%, #B5179E 50%, #7209B7 100%);
    --primary-gradient-hover: linear-gradient(135deg, #FF4DA6 0%, #F72585 50%, #B5179E 100%);
    --primary-glow: 0 0 30px rgba(247, 37, 133, 0.6);
    
    --bg-body: #0b0c15;
    --bg-body-gradient: linear-gradient(135deg, #0b0c15 0%, #161823 100%);
    --bg-card: #161823;
    --bg-card-hover: #1E2030;
    --bg-glass: rgba(22, 24, 35, 0.75);
    --bg-glass-strong: rgba(22, 24, 35, 0.9);
    --bg-elevated: #1E2030;
    
    --text-main: #ffffff;
    --text-secondary: #A0A0B0;
    --text-muted: #606070;
    
    --border: rgba(247, 37, 133, 0.2);
    --border-light: rgba(247, 37, 133, 0.1);
    --border-strong: rgba(247, 37, 133, 0.4);
    
    --border-radius: 8px;
}

/* --- ЗАКАТ --- */
[data-theme="sunset"] {
    --primary: #FF6B6B;
    --primary-light: #FF8787;
    --primary-dark: #EE5A5A;
    --primary-rgb: 255, 107, 107;
    --primary-gradient: linear-gradient(135deg, #FF9F1C 0%, #FF6B6B 50%, #EE5A5A 100%);
    --primary-gradient-hover: linear-gradient(135deg, #FFB84D 0%, #FF8787 50%, #FF6B6B 100%);
    --primary-glow: 0 0 30px rgba(255, 107, 107, 0.5);
    
    --bg-body: #FFF5F0;
    --bg-body-gradient: linear-gradient(135deg, #FFF5F0 0%, #FFE8E0 100%);
    --bg-card: #FFFFFF;
    --bg-card-hover: #FFFAF8;
    
    --border: rgba(255, 107, 107, 0.15);
    --border-light: rgba(255, 107, 107, 0.08);
    --border-strong: rgba(255, 107, 107, 0.3);
}

/* --- ЛАВАНДА --- */
[data-theme="lavender"] {
    --primary: #9D4EDD;
    --primary-light: #B877E8;
    --primary-dark: #7B2CBF;
    --primary-rgb: 157, 78, 221;
    --primary-gradient: linear-gradient(135deg, #C77DFF 0%, #9D4EDD 50%, #7B2CBF 100%);
    --primary-gradient-hover: linear-gradient(135deg, #D9A3FF 0%, #B877E8 50%, #9D4EDD 100%);
    --primary-glow: 0 0 30px rgba(157, 78, 221, 0.5);
    
    --bg-body: #F5F0FF;
    --bg-body-gradient: linear-gradient(135deg, #F5F0FF 0%, #E8D5FF 100%);
    --bg-card: #FFFFFF;
    --bg-card-hover: #FAF5FF;
    
    --border: rgba(157, 78, 221, 0.15);
    --border-light: rgba(157, 78, 221, 0.08);
    --border-strong: rgba(157, 78, 221, 0.3);
}

/* ============================================
   БАЗОВЫЕ СТИЛИ
   ============================================ */
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
    outline: none; 
    font-family: 'Inter', sans-serif; 
}

html { 
    scroll-behavior: smooth; 
}

body { 
    background: var(--bg-body-gradient);
    color: var(--text-main); 
    transition: background var(--transition-slow), color var(--transition);
    overflow-x: hidden;
    line-height: 1.6;
    min-height: 100vh;
}

/* Кастомный скроллбар */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-body);
}
::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 10px;
    border: 2px solid var(--bg-body);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-gradient-hover);
}

/* ============================================
   АНИМАЦИИ
   ============================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(80px, -60px) scale(1.1); }
    66% { transform: translate(-60px, 80px) scale(0.9); }
}

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

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(var(--primary-rgb), 0.3); }
    50% { box-shadow: 0 0 40px rgba(var(--primary-rgb), 0.6); }
}

/* ============================================
   ЛЕНДИНГ
   ============================================ */
#landing {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

/* Анимированные блобы */
.blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.6;
    z-index: 0;
    pointer-events: none;
    animation: blobFloat 25s infinite ease-in-out;
}
.blob-1 { 
    width: 600px; 
    height: 600px; 
    background: var(--primary-gradient);
    top: -150px; 
    left: -150px; 
    animation-delay: 0s;
}
.blob-2 { 
    width: 500px; 
    height: 500px; 
    background: var(--accent-gradient);
    top: 40%; 
    right: -150px; 
    animation-delay: -8s;
    opacity: 0.4;
}
.blob-3 { 
    width: 700px; 
    height: 700px; 
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    bottom: -250px; 
    left: 30%; 
    animation-delay: -16s;
    opacity: 0.5;
}

/* Сетка на фоне */
.grid-bg {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(var(--border-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
    z-index: 0;
    pointer-events: none;
    opacity: 0.4;
}

/* Навигация лендинга */
.landing-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    background: var(--bg-glass);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 28px;
    font-weight: 900;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite;
}

.logo-icon {
    width: 44px; 
    height: 44px;
    background: var(--primary-gradient);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    box-shadow: var(--shadow-glow);
    animation: glow 3s ease-in-out infinite;
}

.nav-actions { 
    display: flex; 
    gap: 15px; 
    align-items: center; 
}

.nav-link {
    padding: 10px 18px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}
.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: -1;
}
.nav-link:hover { 
    color: white;
    transform: translateY(-2px);
}
.nav-link:hover::before {
    opacity: 1;
}

/* Кнопки */
.btn {
    padding: 12px 28px;
    border-radius: 14px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md), var(--primary-glow);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), var(--primary-glow);
}

.btn-ghost {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    color: var(--text-main);
    border: 2px solid var(--border-strong);
}
.btn-ghost:hover { 
    border-color: var(--primary);
    color: var(--primary);
    background: var(--bg-glass-strong);
}

.btn-large {
    padding: 18px 40px;
    font-size: 16px;
    border-radius: 16px;
}

/* Hero секция */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 140px 30px 80px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 22px;
    background: var(--bg-glass);
    backdrop-filter: blur(30px);
    border: 1px solid var(--border-strong);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 35px;
    animation: fadeInDown 0.8s ease;
    box-shadow: var(--shadow-sm);
}
.hero-badge .dot {
    width: 10px; 
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary);
    animation: pulse 2s infinite;
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(52px, 9vw, 120px);
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: 30px;
    letter-spacing: -0.03em;
    animation: fadeInUp 1s ease;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title .gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 4s ease infinite;
    display: inline-block;
    position: relative;
}

.hero-title .gradient-text::after {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: blur(20px);
    opacity: 0.5;
    z-index: -1;
}

.hero-subtitle {
    font-size: clamp(17px, 2.2vw, 24px);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 45px;
    animation: fadeInUp 1.2s ease;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    justify-content: center;
    animation: fadeInUp 1.4s ease;
}

/* Мокап */
.hero-mockup {
    margin-top: 100px;
    width: 100%;
    max-width: 1100px;
    position: relative;
    animation: fadeInUp 1.6s ease;
}

.mockup-window {
    background: var(--bg-glass-strong);
    backdrop-filter: blur(40px);
    border: 1px solid var(--border-strong);
    border-radius: 24px;
    padding: 24px;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.mockup-window::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
}

.mockup-dots { 
    display: flex; 
    gap: 8px; 
    margin-bottom: 20px; 
}
.mockup-dots span { 
    width: 14px; 
    height: 14px; 
    border-radius: 50%; 
    background: var(--border);
    transition: var(--transition-fast);
}
.mockup-dots span:nth-child(1) { background: #FF5F56; }
.mockup-dots span:nth-child(2) { background: #FFBD2E; }
.mockup-dots span:nth-child(3) { background: #27C93F; }
.mockup-dots span:hover { transform: scale(1.2); }

.mockup-content { 
    display: grid; 
    grid-template-columns: 1fr 2fr; 
    gap: 18px; 
    min-height: 400px; 
}
.mockup-sidebar, .mockup-main { 
    background: var(--bg-card); 
    border-radius: 16px; 
    padding: 20px; 
    border: 1px solid var(--border-light);
}

.mockup-item { 
    height: 14px; 
    background: var(--border-light);
    border-radius: 8px; 
    margin-bottom: 12px; 
    position: relative;
    overflow: hidden;
}
.mockup-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(var(--primary-rgb), 0.1), transparent);
    animation: shimmer 2s infinite;
    background-size: 1000px 100%;
}

.mockup-item.w-60 { width: 60%; }
.mockup-item.w-80 { width: 80%; }
.mockup-item.w-40 { width: 40%; }
.mockup-item.primary { 
    background: var(--primary-gradient);
    box-shadow: var(--shadow-sm);
}

.mockup-block { 
    height: 100px; 
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.15), rgba(var(--primary-rgb), 0.05));
    border-radius: 12px; 
    margin-bottom: 12px; 
    border: 1px solid var(--border-light);
}

/* Плавающие карточки */
.floating-card {
    position: absolute;
    background: var(--bg-glass-strong);
    backdrop-filter: blur(30px);
    padding: 18px 24px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 14px;
    animation: float 5s ease-in-out infinite;
    border: 1px solid var(--border-strong);
}
.floating-card-1 {
    top: 20%; 
    left: -50px;
    animation-delay: 0s;
}
.floating-card-2 {
    bottom: 15%; 
    right: -40px;
    animation-delay: -2.5s;
}

.floating-icon {
    width: 48px; 
    height: 48px;
    background: var(--primary-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    box-shadow: var(--shadow-glow);
}

/* Статистика */
.stats-section { 
    padding: 100px 30px; 
    position: relative; 
    z-index: 1; 
}

.stats-grid { 
    max-width: 1200px; 
    margin: 0 auto; 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 35px; 
}

.stat-item {
    text-align: center;
    padding: 40px 25px;
    background: var(--bg-glass);
    backdrop-filter: blur(30px);
    border: 1px solid var(--border-strong);
    border-radius: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 56px;
    font-weight: 900;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 12px;
}

.stat-label { 
    color: var(--text-secondary); 
    font-size: 15px; 
    font-weight: 600;
}

/* Features */
.features-section { 
    padding: 120px 30px; 
    position: relative; 
    z-index: 1; 
}

.section-header { 
    text-align: center; 
    max-width: 750px; 
    margin: 0 auto 70px; 
}

.section-tag {
    display: inline-block;
    padding: 8px 18px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(36px, 5.5vw, 64px);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc { 
    font-size: 19px; 
    color: var(--text-secondary);
    line-height: 1.7;
}

.features-grid { 
    max-width: 1300px; 
    margin: 0 auto; 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 30px; 
}

.feature-card {
    background: var(--bg-glass);
    backdrop-filter: blur(30px);
    border: 1px solid var(--border-strong);
    border-radius: 28px;
    padding: 40px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.feature-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(var(--primary-rgb), 0.1), transparent 70%);
    opacity: 0;
    transition: opacity var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.feature-card:hover::before { 
    transform: scaleX(1); 
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    width: 70px; 
    height: 70px;
    background: var(--primary-gradient);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-glow);
    position: relative;
    z-index: 1;
}

.feature-title { 
    font-family: 'Space Grotesk', sans-serif;
    font-size: 24px; 
    font-weight: 800; 
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
}

.feature-desc { 
    color: var(--text-secondary); 
    font-size: 16px; 
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* CTA */
.cta-section { 
    padding: 120px 30px; 
    position: relative; 
    z-index: 1; 
}

.cta-box {
    max-width: 1100px;
    margin: 0 auto;
    background: var(--primary-gradient);
    border-radius: 36px;
    padding: 90px 50px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl), var(--primary-glow);
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 1px, transparent 1px);
    background-size: 40px 40px;
    animation: rotate 30s linear infinite;
}

.cta-title { 
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(36px, 5.5vw, 58px); 
    font-weight: 900; 
    margin-bottom: 24px; 
    position: relative; 
    z-index: 1;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.cta-desc { 
    font-size: 20px; 
    opacity: 0.95; 
    margin-bottom: 40px; 
    position: relative; 
    z-index: 1;
}

.cta-box .btn { 
    background: white; 
    color: var(--primary-dark);
    position: relative; 
    z-index: 1;
    box-shadow: var(--shadow-lg);
}

.cta-box .btn:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: var(--shadow-xl);
}

.landing-footer { 
    padding: 50px 30px; 
    text-align: center; 
    color: var(--text-muted); 
    font-size: 15px; 
    border-top: 1px solid var(--border); 
    position: relative; 
    z-index: 1;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
}

.reveal { 
    opacity: 0; 
    transform: translateY(50px); 
    transition: opacity 0.8s ease, transform 0.8s ease; 
}

.reveal.visible { 
    opacity: 1; 
    transform: translateY(0); 
}

/* ============================================
   ПРИЛОЖЕНИЕ
   ============================================ */
#app { 
    display: none; 
    min-height: 100vh; 
}

.app-layout { 
    display: flex; 
    min-height: 100vh; 
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-glass-strong);
    backdrop-filter: blur(40px);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-strong);
    z-index: 100;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.nav-menu { 
    flex: 1; 
    margin-top: 35px; 
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    margin-bottom: 8px;
    border-radius: 16px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-weight: 600;
    font-size: 15px;
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.nav-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: -1;
}

.nav-item:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.nav-item.active {
    color: white;
    box-shadow: var(--shadow-md), var(--primary-glow);
}

.nav-item.active::before {
    opacity: 1;
}

.nav-item i { 
    width: 24px; 
    text-align: center; 
    font-size: 18px; 
}

.nav-badge {
    margin-left: auto;
    background: var(--accent-gradient);
    color: #000;
    font-size: 11px;
    padding: 3px 9px;
    border-radius: 12px;
    font-weight: 800;
    box-shadow: var(--shadow-xs);
}

.nav-item.active .nav-badge { 
    background: white; 
    color: var(--primary-dark); 
}

.user-mini {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px;
    background: var(--bg-body);
    border-radius: 18px;
    margin-top: 20px;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-mini:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
}

.avatar {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    border: 3px solid var(--bg-card);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.avatar-wrapper { 
    position: relative; 
}

.online-dot {
    width: 14px;
    height: 14px;
    background: #2ecc71;
    border-radius: 50%;
    border: 3px solid var(--bg-card);
    position: absolute;
    bottom: 0;
    right: 0;
    box-shadow: 0 0 10px rgba(46, 204, 113, 0.6);
    animation: pulse 2s infinite;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 35px 50px;
    max-width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
}

.page-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    margin-bottom: 35px;
    animation: fadeInDown 0.5s ease;
}

.page-title { 
    font-family: 'Space Grotesk', sans-serif;
    font-size: 36px; 
    font-weight: 900; 
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Tabs */
.tab-content { 
    display: none; 
    animation: fadeIn 0.5s ease; 
}

.tab-content.active { 
    display: block; 
}

/* Cards */
.card {
    background: var(--bg-glass-strong);
    backdrop-filter: blur(30px);
    border-radius: var(--border-radius);
    padding: 28px;
    margin-bottom: 24px;
    border: 1px solid var(--border-strong);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.card:hover { 
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* ============================================
   АУДИО ПЛЕЕР
   ============================================ */
.audio-layout { 
    display: grid; 
    grid-template-columns: 1fr 400px; 
    gap: 28px; 
    height: calc(100vh - 140px); 
}

.audio-main {
    background: var(--bg-glass-strong);
    backdrop-filter: blur(30px);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-strong);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.visualizer-wrap {
    height: 240px;
    background: var(--primary-gradient);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 25px;
}

.visualizer-wrap::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 100%, rgba(0,0,0,0.4), transparent 70%);
}

#visualizer { 
    width: 100%; 
    height: 100%; 
    position: relative; 
    z-index: 1; 
}

.now-playing-info { 
    position: absolute; 
    bottom: 25px; 
    left: 25px; 
    color: white; 
    z-index: 2; 
}

.now-playing-info .track-title { 
    font-family: 'Space Grotesk', sans-serif;
    font-size: 26px; 
    font-weight: 800; 
    margin-bottom: 6px; 
    text-shadow: 0 3px 15px rgba(0,0,0,0.4);
}

.now-playing-info .track-artist { 
    font-size: 15px; 
    opacity: 0.95;
    font-weight: 600;
}

.track-list-header { 
    padding: 22px 28px 12px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    border-bottom: 1px solid var(--border);
}

.track-list-header h3 { 
    font-size: 18px; 
    font-weight: 800; 
}

.upload-btn {
    background: var(--primary-gradient);
    color: white;
    padding: 10px 20px;
    border-radius: 12px;
    border: none;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.upload-btn:hover { 
    transform: translateY(-2px); 
    box-shadow: var(--shadow-md), var(--primary-glow);
}

.track-list { 
    flex: 1; 
    overflow-y: auto; 
    padding: 12px; 
}

.track-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 18px;
    border-radius: 14px;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-bottom: 4px;
}

.track-item:hover { 
    background: rgba(var(--primary-rgb), 0.1);
    transform: translateX(5px);
}

.track-item.active { 
    background: rgba(var(--primary-rgb), 0.15);
    border: 1px solid var(--border-strong);
}

.track-item.active .track-title { 
    color: var(--primary);
    font-weight: 700;
}

.track-cover {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.track-info { 
    flex: 1; 
    min-width: 0; 
}

.track-title { 
    font-weight: 600; 
    font-size: 15px; 
    margin-bottom: 3px; 
    white-space: nowrap; 
    overflow: hidden; 
    text-overflow: ellipsis;
    transition: var(--transition-fast);
}

.track-artist-small { 
    font-size: 13px; 
    color: var(--text-muted); 
}

.track-duration { 
    font-size: 13px; 
    color: var(--text-muted); 
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

.audio-sidebar { 
    display: flex; 
    flex-direction: column; 
    gap: 24px; 
}

.player-card { 
    background: var(--bg-glass-strong);
    backdrop-filter: blur(30px);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-strong);
    padding: 28px;
    box-shadow: var(--shadow-md);
}

.progress-wrap { 
    margin-bottom: 24px; 
}

.progress-bar {
    height: 8px;
    background: var(--border-light);
    border-radius: 4px;
    position: relative;
    cursor: pointer;
    overflow: hidden;
    box-shadow: var(--shadow-inner);
}

.progress-fill {
    height: 100%;
    background: var(--primary-gradient);
    width: 0%;
    border-radius: 4px;
    position: relative;
    transition: width 0.1s;
    box-shadow: 0 0 10px rgba(var(--primary-rgb), 0.5);
}

.progress-fill::after {
    content: '';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.3), var(--shadow-sm);
    transition: var(--transition-fast);
}

.progress-fill:hover::after {
    transform: translateY(-50%) scale(1.2);
}

.progress-times { 
    display: flex; 
    justify-content: space-between; 
    margin-top: 10px; 
    font-size: 12px; 
    color: var(--text-muted); 
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

.player-controls { 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    gap: 20px; 
    margin-bottom: 24px; 
}

.ctrl-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: transparent;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    font-size: 18px;
}

.ctrl-btn:hover { 
    color: var(--primary); 
    transform: scale(1.15);
    background: rgba(var(--primary-rgb), 0.1);
}

.ctrl-btn.active { 
    color: var(--primary); 
}

.play-btn {
    width: 68px;
    height: 68px;
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-lg), var(--primary-glow);
    font-size: 24px;
}

.play-btn:hover {
    transform: scale(1.1);
    color: white;
    box-shadow: var(--shadow-xl), var(--primary-glow);
}

.volume-wrap { 
    display: flex; 
    align-items: center; 
    gap: 14px; 
    padding: 0 8px; 
}

.volume-wrap i { 
    color: var(--text-muted); 
    font-size: 16px; 
}

.volume-slider {
    flex: 1;
    height: 6px;
    background: var(--border-light);
    border-radius: 3px;
    position: relative;
    cursor: pointer;
    box-shadow: var(--shadow-inner);
}

.volume-fill {
    height: 100%;
    background: var(--primary-gradient);
    width: 70%;
    border-radius: 3px;
    box-shadow: 0 0 8px rgba(var(--primary-rgb), 0.4);
}

/* ============================================
   АДАПТИВНОСТЬ
   ============================================ */
@media(max-width: 1200px) {
    .audio-layout { 
        grid-template-columns: 1fr; 
        height: auto; 
    }
    .features-grid { 
        grid-template-columns: 1fr 1fr; 
    }
    .stats-grid { 
        grid-template-columns: 1fr 1fr; 
    }
}

@media(max-width: 768px) {
    .sidebar { 
        width: 100%; 
        height: 70px; 
        bottom: 0; 
        top: auto; 
        flex-direction: row; 
        padding: 10px; 
        justify-content: space-around; 
        border-right: none; 
        border-top: 1px solid var(--border-strong); 
    }
    .logo, .user-mini, .nav-item span { 
        display: none; 
    }
    .nav-menu { 
        display: flex; 
        margin: 0; 
        width: 100%; 
        justify-content: space-around; 
    }
    .nav-item { 
        margin: 0; 
        padding: 12px; 
    }
    .main-content { 
        margin-left: 0; 
        padding: 25px 20px; 
        margin-bottom: 70px; 
        max-width: 100%; 
    }
    .admin-stats { 
        grid-template-columns: 1fr 1fr; 
    }
    .features-grid { 
        grid-template-columns: 1fr; 
    }
    .landing-nav { 
        padding: 18px 25px; 
    }
    .nav-link { 
        display: none; 
    }
    .floating-card { 
        display: none; 
    }
    .hero-title {
        font-size: clamp(40px, 8vw, 80px);
    }
}
/* ============================================
   КАСТОМНЫЕ SVG-ИКОНКИ И АНИМАЦИИ
   ============================================ */

.gv-icon {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.gv-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.gv-action-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(var(--primary-rgb), 0.05);
    transform: translateY(-2px);
}

.gv-action-btn .gv-icon {
    width: 18px;
    height: 18px;
}

/* ЛАЙК */
.gv-action-like.liked {
    color: #FF4757;
    border-color: #FF4757;
    background: rgba(255, 71, 87, 0.1);
}

.gv-action-like.liked .gv-icon {
    animation: heartPop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    fill: #FF4757;
    stroke: #FF4757;
}

@keyframes heartPop {
    0% { transform: scale(1); }
    25% { transform: scale(1.4); }
    50% { transform: scale(0.9); }
    100% { transform: scale(1); }
}

/* КОММЕНТАРИЙ */
.gv-action-comment:hover .gv-icon {
    animation: commentBounce 0.5s ease;
}

@keyframes commentBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

/* РЕПОСТ */
.gv-action-share:hover .gv-icon {
    animation: shareRotate 0.5s ease;
}

@keyframes shareRotate {
    0% { transform: rotate(0); }
    100% { transform: rotate(360deg); }
}

/* СЕКЦИЯ КОММЕНТАРИЕВ */
.comments-section {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-light);
    animation: fadeIn 0.3s ease;
}

.comment-item {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    animation: slideInLeft 0.3s ease;
}

.comment-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--primary-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.comment-body {
    flex: 1;
    background: var(--bg-body);
    padding: 10px 14px;
    border-radius: 16px;
    border-top-left-radius: 4px;
}

.comment-author {
    font-weight: 700;
    font-size: 13px;
    margin-bottom: 2px;
    color: var(--text-main);
}

.comment-text {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.comment-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
}

.comment-form {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 10px;
}

.comment-input {
    flex: 1;
    padding: 10px 16px;
    background: var(--bg-body);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 14px;
    color: var(--text-main);
    transition: 0.2s;
}

.comment-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}