:root {
    --bg-deep: #05070f;
    --bg-surface: #0b0f1f;
    --bg-card: rgba(15, 21, 42, 0.78);
    --bg-card-solid: #10162b;
    --border-subtle: rgba(255, 255, 255, 0.07);
    --border-neon: rgba(168, 85, 247, 0.32);
    --border-cyan: rgba(6, 182, 212, 0.4);
    --text-white: #f8fafc;
    --text-secondary: #94a3b8;
    --text-dim: #64748b;
    --purple: #a855f7;
    --pink: #ec4899;
    --blue: #3b82f6;
    --cyan: #06b6d4;
    --emerald: #10b981;
    --grad-primary: linear-gradient(135deg, #d946ef 0%, #7c3aed 45%, #2563eb 80%, #06b6d4 100%);
    --grad-text: linear-gradient(95deg, #f0abfc 0%, #a5b4fc 45%, #22d3ee 100%);
    --grad-card: linear-gradient(160deg, rgba(124, 58, 237, 0.14) 0%, rgba(6, 182, 212, 0.06) 100%);
    --shadow-glow: 0 12px 40px -8px rgba(124, 58, 237, 0.45), 0 0 25px rgba(6, 182, 212, 0.22);
    --sidebar-w: 276px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-deep);
    color: var(--text-white);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Фоновые неоновые сферы */
.ambient-glow {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(circle at 15% 12%, rgba(168, 85, 247, 0.15) 0%, transparent 38%),
        radial-gradient(circle at 85% 18%, rgba(6, 182, 212, 0.14) 0%, transparent 40%),
        radial-gradient(circle at 50% 88%, rgba(59, 130, 246, 0.10) 0%, transparent 45%);
}

/* Утилиты и кнопки */
.btn-primary {
    background: var(--grad-primary);
    color: #fff;
    border: none;
    padding: 11px 22px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.92rem;
    cursor: pointer;
    box-shadow: var(--shadow-glow);
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    text-decoration: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    filter: brightness(1.12);
}

.btn-lg {
    padding: 15px 32px;
    font-size: 1.02rem;
    border-radius: 14px;
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-white);
    border: 1px solid var(--border-subtle);
    padding: 10px 18px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-ghost:hover {
    border-color: var(--cyan);
    background: rgba(6, 182, 212, 0.1);
}

.lang-switch {
    display: inline-flex;
    background: rgba(11, 15, 31, 0.9);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 3px;
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 5px 10px;
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: 7px;
    cursor: pointer;
    transition: 0.2s;
}

.lang-btn.active {
    background: var(--grad-primary);
    color: #fff;
}

/* Фирменный бренд FFAI */
.brand-box {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    cursor: pointer;
}

.brand-svg {
    width: 42px;
    height: 42px;
    filter: drop-shadow(0 0 12px rgba(6, 182, 212, 0.5));
    flex-shrink: 0;
}

.brand-text-wrap {
    display: flex;
    flex-direction: column;
}

.brand-ffai {
    font-size: 1.3rem;
    font-weight: 900;
    letter-spacing: 1.5px;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.05;
}

.brand-sub {
    font-size: 0.62rem;
    letter-spacing: 3.6px;
    color: var(--text-secondary);
    font-weight: 700;
    margin-top: 2px;
}

/* =========================================================
   ЧАСТЬ 1: ПРИВЕТСТВЕННАЯ СТРАНИЦА (LANDING VIEW)
   ========================================================= */
#view-landing {
    position: relative;
    z-index: 1;
}

.landing-nav {
    position: sticky;
    top: 0;
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 6%;
    background: rgba(5, 7, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.landing-nav-links {
    display: flex;
    gap: 28px;
}

.landing-nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
    transition: 0.2s;
}

.landing-nav-links a:hover {
    color: #22d3ee;
}

.landing-hero {
    max-width: 1220px;
    margin: 0 auto;
    padding: 72px 20px 60px;
    text-align: center;
}

.hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    border-radius: 99px;
    background: rgba(168, 85, 247, 0.12);
    border: 1px solid rgba(168, 85, 247, 0.35);
    color: #e879f9;
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.landing-hero h1 {
    font-size: clamp(2.3rem, 5vw, 4.1rem);
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 22px;
}

.landing-hero h1 .grad {
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.landing-hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 760px;
    margin: 0 auto 36px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 56px;
}

/* Интерактивное превью студии на главной */
.hero-showcase {
    background: linear-gradient(180deg, rgba(19, 27, 56, 0.85) 0%, rgba(9, 13, 28, 0.95) 100%);
    border: 1px solid var(--border-neon);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7), 0 0 50px rgba(124, 58, 237, 0.22);
    max-width: 1040px;
    margin: 0 auto;
    text-align: left;
}

.showcase-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-subtle);
}

.dots {
    display: flex;
    gap: 7px;
}

.dots span {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}

.showcase-tracks {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.track-row {
    background: rgba(5, 7, 15, 0.75);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.track-label {
    width: 190px;
    font-size: 0.82rem;
    font-weight: 700;
    color: #cbd5e1;
    flex-shrink: 0;
}

.wave-bars {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 4px;
    height: 34px;
}

.wave-bars i {
    flex: 1;
    background: var(--grad-primary);
    border-radius: 3px;
    display: block;
}

/* BENTO-СЕТКА ВОЗМОЖНОСТЕЙ */
.features-section {
    max-width: 1220px;
    margin: 0 auto;
    padding: 60px 20px;
}

.sec-head {
    text-align: center;
    margin-bottom: 44px;
}

.sec-head h2 {
    font-size: clamp(1.8rem, 3.2vw, 2.6rem);
    font-weight: 900;
    margin-bottom: 12px;
}

.sec-head p {
    color: var(--text-secondary);
    font-size: 1.02rem;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 22px;
}

.bento-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 28px;
    transition: all 0.25s;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.bento-card:hover {
    border-color: var(--cyan);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.bento-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--grad-card);
    border: 1px solid var(--border-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 18px;
}

.bento-card h3 {
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.bento-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 18px;
}

/* =========================================================
   ЧАСТЬ 2: РАБОЧАЯ СТУДИЯ С ЛЕВЫМ МЕНЮ (STUDIO APP VIEW)
   ========================================================= */
#view-studio {
    display: none;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

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

/* ЛЕВОЕ БОКОВОЕ МЕНЮ (SIDEBAR) */
.sidebar {
    width: var(--sidebar-w);
    background: rgba(9, 13, 26, 0.95);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 80;
    backdrop-filter: blur(20px);
    transition: transform 0.3s ease;
}

.sidebar-top {
    padding: 22px 20px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-menu {
    flex: 1;
    padding: 18px 12px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.menu-category {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--text-dim);
    padding: 10px 12px 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 0.91rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
    background: transparent;
    width: 100%;
    text-align: left;
}

.nav-item:hover {
    color: var(--text-white);
    background: rgba(255, 255, 255, 0.04);
}

.nav-item.active {
    color: #fff;
    background: linear-gradient(90deg, rgba(168, 85, 247, 0.22) 0%, rgba(6, 182, 212, 0.12) 100%);
    border-color: rgba(6, 182, 212, 0.35);
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.2);
}

.nav-item .ni-icon {
    font-size: 1.18rem;
    width: 24px;
    text-align: center;
}

/* Нижняя карточка профиля и баланса в левом меню */
.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-subtle);
    background: rgba(5, 7, 15, 0.6);
}

.credit-widget {
    background: var(--grad-card);
    border: 1px solid var(--border-cyan);
    border-radius: 14px;
    padding: 14px;
    margin-bottom: 12px;
}

.cw-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.cw-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.cw-value {
    font-size: 1.05rem;
    font-weight: 900;
    color: #22d3ee;
}

.user-mini {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding-top: 6px;
}

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
}

/* ПРАВАЯ ОСНОВНАЯ ОБЛАСТЬ СТУДИИ */
.studio-main {
    flex: 1;
    margin-left: var(--sidebar-w);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.studio-topbar {
    height: 70px;
    padding: 0 32px;
    background: rgba(5, 7, 15, 0.75);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 60;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: #fff;
    padding: 7px 11px;
    border-radius: 8px;
    cursor: pointer;
}

.server-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 0.78rem;
    padding: 5px 12px;
    border-radius: 99px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
    font-weight: 600;
}

.studio-content {
    padding: 32px;
    max-width: 1180px;
    width: 100%;
    margin: 0 auto;
}

/* СТРАНИЦЫ РАЗДЕЛОВ ВНУТРИ СТУДИИ */
.studio-page {
    display: none;
    animation: fadeIn 0.22s ease;
}

.studio-page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-title-bar {
    margin-bottom: 28px;
}

.page-title-bar h1 {
    font-size: 1.75rem;
    font-weight: 900;
    margin-bottom: 6px;
}

.page-title-bar p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Статистика на Дашборде */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-bottom: 30px;
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 18px;
    padding: 22px;
}

.stat-box .sb-title {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.stat-box .sb-val {
    font-size: 1.85rem;
    font-weight: 900;
}

/* Карточки инструментов и настроек */
.work-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 24px;
}

.panel-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 26px;
}

.panel-card h3 {
    font-size: 1.08rem;
    font-weight: 800;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.dropzone {
    border: 2px dashed rgba(168, 85, 247, 0.38);
    border-radius: 16px;
    padding: 32px 20px;
    text-align: center;
    background: rgba(5, 7, 15, 0.55);
    cursor: pointer;
    transition: all 0.25s;
    margin-bottom: 16px;
}

.dropzone:hover {
    border-color: #22d3ee;
    background: rgba(6, 182, 212, 0.06);
}

.dropzone .dz-icon {
    font-size: 2.3rem;
    margin-bottom: 10px;
}

.dropzone h4 {
    font-size: 0.98rem;
    margin-bottom: 5px;
}

.dropzone span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 12px 14px;
    background: rgba(5, 7, 15, 0.85);
    border: 1px solid var(--border-subtle);
    border-radius: 11px;
    color: #fff;
    font-size: 0.9rem;
    outline: none;
}

.form-control:focus {
    border-color: #22d3ee;
}

.range-slider {
    width: 100%;
    accent-color: #a855f7;
}

/* Тарифная сетка */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.price-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 28px;
    text-align: center;
    position: relative;
}

.price-card.featured {
    border-color: #22d3ee;
    box-shadow: var(--shadow-glow);
    background: linear-gradient(180deg, rgba(124, 58, 237, 0.18), rgba(6, 182, 212, 0.08));
}

.price-mins {
    font-size: 2.2rem;
    font-weight: 900;
    color: #22d3ee;
    margin: 12px 0;
}

.price-cost {
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 18px;
}

/* Таблицы */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.data-table th, .data-table td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 600;
}

/* Модалка авторизации */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(3, 5, 12, 0.84);
    backdrop-filter: blur(12px);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-backdrop.open {
    display: flex;
}

.modal-card {
    background: #0d1326;
    border: 1px solid var(--border-cyan);
    border-radius: 22px;
    width: 100%;
    max-width: 440px;
    padding: 30px;
    box-shadow: var(--shadow-glow);
    position: relative;
}

.modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    cursor: pointer;
}

@media (max-width: 960px) {
    .work-grid {
        grid-template-columns: 1fr;
    }
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    .studio-main {
        margin-left: 0;
    }
    .mobile-menu-btn {
        display: inline-flex;
    }
    .landing-nav-links {
        display: none;
    }
}