/**
 * ONETWOWEB — UI/UX 2026 Design System v2.0
 */

/* ==================== 1. CSS CUSTOM PROPERTIES ==================== */
:root {
    --accent: #ff611d;
    --accent-light: #ff8a4c;
    --accent-dark: #e05518;
    --accent-glow: rgba(255, 97, 29, 0.25);
    --accent-gradient: linear-gradient(135deg, #ff611d 0%, #ff8a4c 50%, #ffb380 100%);
    --accent-gradient-2: linear-gradient(135deg, #ff611d 0%, #c0392b 100%);

    --bg-primary: #07070d;
    --bg-secondary: #0e0e17;
    --bg-tertiary: #161622;
    --bg-card: rgba(14, 14, 23, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.025);
    --bg-glass-hover: rgba(255, 255, 255, 0.05);
    --bg-elevated: #1c1c2c;

    --text-primary: #eeeef2;
    --text-secondary: #9898b0;
    --text-muted: #6b6b80;
    --text-inverse: #0a0a0f;

    --border: rgba(255, 255, 255, 0.07);
    --border-light: rgba(255, 255, 255, 0.04);
    --border-hover: rgba(255, 97, 29, 0.35);
    --border-active: rgba(255, 97, 29, 0.6);

    --shadow-xs: 0 1px 4px rgba(0,0,0,0.3);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
    --shadow-md: 0 8px 32px rgba(0,0,0,0.55);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.65);
    --shadow-xl: 0 32px 80px rgba(0,0,0,0.8);
    --shadow-glow: 0 0 50px var(--accent-glow);
    --shadow-glow-sm: 0 0 20px var(--accent-glow);
    --shadow-inset: inset 0 2px 6px rgba(0,0,0,0.2);

    --radius-xs: 8px;
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-xl: 36px;
    --radius-full: 9999px;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --duration-fast: 150ms;
    --duration: 300ms;
    --duration-slow: 500ms;
    --duration-slower: 800ms;

    --section-padding: 140px;
    --section-padding-mobile: 80px;
    --container-max: 1320px;
    --navbar-height: 72px;
}

[data-theme="light"] {
    --bg-primary: #f8f8fb;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eeeef2;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(0, 0, 0, 0.02);
    --bg-glass-hover: rgba(0, 0, 0, 0.04);
    --bg-elevated: #ffffff;

    --text-primary: #1a1a2e;
    --text-secondary: #6b6b80;
    --text-muted: #a0a0b8;
    --text-inverse: #ffffff;

    --border: rgba(0, 0, 0, 0.07);
    --border-light: rgba(0, 0, 0, 0.04);
    --border-hover: rgba(255, 97, 29, 0.3);
    --border-active: rgba(255, 97, 29, 0.5);

    --shadow-xs: 0 1px 3px rgba(0,0,0,0.04);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 32px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.1);
    --shadow-xl: 0 32px 80px rgba(0,0,0,0.15);
    --shadow-glow: 0 0 40px var(--accent-glow);
    --shadow-glow-sm: 0 0 16px var(--accent-glow);
    --shadow-inset: inset 0 2px 6px rgba(0,0,0,0.04);
}

/* ==================== 2. RESET & BASE ==================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.65;
    overflow-x: hidden;
    transition: background-color var(--duration) var(--ease-out), color var(--duration) var(--ease-out);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

::selection { background: var(--accent); color: white; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ==================== 3. TYPOGRAPHY ==================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
}
h1 { font-size: clamp(2.5rem, 5.5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

.kinetic {
    background: var(--accent-gradient);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 5s ease infinite;
}

.mono-accent {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
}

/* ==================== 4. PRELOADER ==================== */
#preloader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s var(--ease-out), visibility 0.5s;
}
#preloader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader-spinner { animation: rotate 2s linear infinite; }

/* ==================== 5. ANIMATIONS ==================== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}
@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}
@keyframes glowPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
@keyframes floatSlow {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}
@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); }
    25% { transform: translateY(-5px) translateX(3px); }
    50% { transform: translateY(-10px) translateX(-3px); }
    75% { transform: translateY(-5px) translateX(3px); }
}
@keyframes gridMove {
    0% { background-position: 0 0; }
    100% { background-position: 64px 64px; }
}
@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-fadeUp {
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) forwards;
}
.animate-scaleIn {
    opacity: 0;
    animation: scaleIn 0.6s var(--ease-out) forwards;
}

/* ==================== 6. BUTTONS ==================== */
.btn-2026 {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    box-shadow: 0 4px 20px var(--accent-glow);
    text-decoration: none;
    white-space: nowrap;
}
.btn-2026:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px var(--accent-glow);
    color: white;
}
.btn-2026--large { padding: 18px 40px; font-size: 1rem; }
.btn-2026--small { padding: 10px 20px; font-size: 0.875rem; }
.btn-2026 .btn-arrow { transition: transform var(--duration-fast) var(--ease-out); }
.btn-2026:hover .btn-arrow { transform: translateX(4px); }

.btn-glass-2026 {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    text-decoration: none;
    white-space: nowrap;
}
.btn-glass-2026:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow-sm);
    color: var(--text-primary);
}
.btn-glass-2026--small { padding: 10px 20px; font-size: 0.875rem; }

/* ==================== 7. NAVBAR ==================== */
.navbar-2026 {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    padding: 16px 0;
    transition: all var(--duration) var(--ease-out);
    border-bottom: 1px solid transparent;
}
.navbar-2026.scrolled {
    background: var(--bg-card);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-sm);
    padding: 12px 0;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.navbar-brand-2026 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    flex-shrink: 0;
}
.navbar-brand-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav-desktop {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-link-2026 {
    padding: 10px 18px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out);
    position: relative;
}
.nav-link-2026::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: transform var(--duration-fast) var(--ease-out);
}
.nav-link-2026:hover,
.nav-link-2026.active {
    color: var(--text-primary);
    background: var(--bg-glass);
}
.nav-link-2026:hover::after,
.nav-link-2026.active::after {
    transform: translateX(-50%) scaleX(1);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}
.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--duration-fast) var(--ease-out);
}
.mobile-menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 998;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration) var(--ease-out);
}
.mobile-menu.active { opacity: 1; visibility: visible; }
.mobile-menu-inner { text-align: center; padding: 80px 24px; }
.mobile-nav { display: flex; flex-direction: column; gap: 8px; margin-bottom: 32px; }
.mobile-nav-link {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    padding: 12px;
    transition: color var(--duration-fast);
}
.mobile-nav-link:hover,
.mobile-nav-link.active { color: var(--accent); }
.mobile-menu-actions { max-width: 300px; margin: 0 auto; }

.theme-toggle {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    color: var(--text-primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}
.theme-toggle:hover {
    background: var(--bg-glass-hover);
    border-color: var(--accent);
    box-shadow: var(--shadow-glow-sm);
    transform: rotate(20deg);
}

.logo-for-dark-theme { display: block; }
.logo-for-light-theme { display: none; }
[data-theme="light"] .logo-for-dark-theme { display: none; }
[data-theme="light"] .logo-for-light-theme { display: block; }

/* ==================== 8. HERO ==================== */
.hero-2026 {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: var(--section-padding) 0;
}
.hero-2026--small {
    min-height: 50vh;
    padding: calc(var(--navbar-height) + 80px) 0 80px;
}

.hero-bg-layer { position: absolute; inset: 0; z-index: 0; pointer-events: none; }

.hero-grid-noise {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 64px 64px;
    animation: gridMove 25s linear infinite;
}

.hero-video { position: absolute; width: 100%; height: 100%; object-fit: cover; scale: 1.1; }

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 25% 40%, rgba(255,97,29,0.12) 0%, transparent 55%),
        radial-gradient(ellipse at 75% 60%, rgba(128,0,255,0.08) 0%, transparent 55%),
        rgba(0,0,0,0.75);
}
[data-theme="light"] .hero-overlay {
    background:
        radial-gradient(ellipse at 25% 40%, rgba(255,97,29,0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 75% 60%, rgba(128,0,255,0.04) 0%, transparent 55%),
        rgba(255,255,255,0.8);
}

.hero-particles { position: absolute; inset: 0; z-index: 1; pointer-events: none; }

.hero-content { position: relative; z-index: 1; text-align: center; max-width: 860px; padding: 0 24px; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-full);
    padding: 8px 22px;
    margin-bottom: 36px;
}
.hero-badge-dot {
    width: 9px;
    height: 9px;
    background: var(--accent);
    border-radius: 50%;
    animation: glowPulse 2s ease-in-out infinite;
}
.hero-badge-text { font-size: 0.875rem; font-weight: 500; color: var(--text-primary); }

.hero-title { margin-bottom: 28px; }
.hero-title-accent {
    display: block;
    background: var(--accent-gradient);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 5s ease infinite;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

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

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}
.scroll-indicator-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    border-radius: 1px;
}

/* ==================== 9. LAYOUT ==================== */
.container-2026 { max-width: var(--container-max); margin: 0 auto; padding: 0 28px; }
.section-padding { padding: var(--section-padding) 0; }
.section-padding-sm { padding: 80px 0; }

.section-header { text-align: center; margin-bottom: 72px; }
.section-header .section-title { margin-top: 16px; }
.section-header p {
    color: var(--text-secondary);
    max-width: 560px;
    margin: 20px auto 0;
    font-size: 1.125rem;
}

.glass-2026 {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
}

/* ==================== 10. BENTO ==================== */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 220px;
    gap: 24px;
}

.bento-item {
    background: var(--bg-card);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
    position: relative;
    overflow: hidden;
    transition: all var(--duration) var(--ease-out);
    cursor: default;
    display: flex;
    flex-direction: column;
}
.bento-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity var(--duration) var(--ease-out);
}

.bento-item--large { grid-column: span 2; grid-row: span 2; }
.bento-item--medium { grid-column: span 2; grid-row: span 1; }
.bento-item--small { grid-column: span 1; grid-row: span 1; }

.bento-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--border-hover);
}
.bento-item:hover::before { opacity: 1; }

.bento-glow {
    position: absolute;
    bottom: -40%;
    right: -40%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--duration) var(--ease-out);
    pointer-events: none;
}
.bento-item:hover .bento-glow { opacity: 0.6; }

.bento-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 4px 16px var(--accent-glow);
}
.bento-icon.floating { animation: floatSlow 5s ease-in-out infinite; }

.bento-item h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; color: var(--text-primary); }
.bento-item p { color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.6; flex: 1; }

.bento-price {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    font-weight: 700;
    font-size: 1.25rem;
    margin-top: auto;
}

/* ==================== 11. STATS ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--duration) var(--ease-out);
}
.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.stat-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 8px;
}
.stat-label { color: var(--text-secondary); font-weight: 500; }

/* ==================== 12. PORTFOLIO ==================== */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
}

.portfolio-card {
    display: block;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border);
    transition: all var(--duration) var(--ease-out);
    cursor: pointer;
    text-decoration: none;
}
.portfolio-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--border-hover);
}

.portfolio-card-image {
    aspect-ratio: 16/10;
    position: relative;
    overflow: hidden;
    background: var(--bg-tertiary);
}
.portfolio-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s var(--ease-out);
}
.portfolio-card:hover .portfolio-card-image img { transform: scale(1.06); }

.portfolio-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top,
        rgba(0,0,0,0.95) 0%,
        rgba(0,0,0,0.5) 40%,
        transparent 100%);
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    opacity: 0;
    transition: opacity var(--duration) var(--ease-out);
}
.portfolio-card:hover .portfolio-card-overlay { opacity: 1; }

.portfolio-card-category {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 10px;
}
.portfolio-card-overlay h3 { font-size: 1.5rem; font-weight: 700; color: white; margin-bottom: 14px; }

.portfolio-card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: white;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: gap var(--duration-fast) var(--ease-out);
}
.portfolio-card:hover .portfolio-card-link { gap: 14px; }

/* ==================== 13. CALCULATOR ==================== */
.calculator-2026 { perspective: 1200px; margin: 40px 0; }

.calculator-2026-inner {
    background: var(--bg-card);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 48px;
    transition: transform 0.5s var(--ease-out);
    transform-style: preserve-3d;
}
.calculator-2026:hover .calculator-2026-inner { transform: rotateX(3deg) rotateY(3deg); }

.mode-switcher {
    display: flex;
    gap: 8px;
    margin-bottom: 36px;
    background: var(--bg-secondary);
    padding: 6px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-inset);
}

.mode-btn {
    flex: 1;
    padding: 13px 28px;
    border: none;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}
.mode-btn.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.calc-result {
    text-align: center;
    margin-top: 36px;
    padding-top: 36px;
    border-top: 1px solid var(--border);
}

.calc-price {
    font-family: 'JetBrains Mono', monospace;
    font-size: 3rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.calc-price-note {
    display: block;
    margin-top: 10px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ==================== 14. CERTIFICATES ==================== */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.certificate-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--duration) var(--ease-out);
    aspect-ratio: 3/4;
    position: relative;
}
.certificate-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-hover);
}
.certificate-card img { width: 100%; height: 100%; object-fit: cover; }

.certificate-card-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
    padding: 24px 16px 12px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: white;
    opacity: 0;
    transition: opacity var(--duration) var(--ease-out);
}
.certificate-card:hover .certificate-card-title { opacity: 1; }

/* ==================== 15. CTA ==================== */
.cta-section {
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 80px 48px;
    text-align: center;
    border: 1px solid var(--border);
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
    opacity: 0.5;
    pointer-events: none;
}

/* ==================== 16. FOOTER ==================== */
.footer-2026 {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 80px 0 0;
    margin-top: var(--section-padding);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-col--brand { display: flex; flex-direction: column; gap: 24px; }

.footer-description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 320px;
}

.footer-social { display: flex; gap: 12px; }

.footer-social-link {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--bg-glass);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--duration-fast) var(--ease-out);
    font-size: 1.125rem;
    text-decoration: none;
}
.footer-social-link:hover {
    background: var(--accent-gradient);
    color: white;
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-sm);
}

.footer-heading { font-size: 1rem; font-weight: 700; margin-bottom: 20px; color: var(--text-primary); }

.footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; padding: 0; margin: 0; }
.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    transition: color var(--duration-fast) var(--ease-out);
    text-decoration: none;
}
.footer-links a:hover { color: var(--accent); }

.footer-contacts { list-style: none; display: flex; flex-direction: column; gap: 14px; padding: 0; margin: 0; }
.footer-contacts li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}
.footer-contacts li i { color: var(--accent); width: 20px; text-align: center; margin-top: 2px; }
.footer-contacts li a { color: var(--text-secondary); text-decoration: none; }
.footer-contacts li a:hover { color: var(--accent); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 28px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-copy { color: var(--text-muted); font-size: 0.875rem; margin: 0; }
.footer-legal { display: flex; gap: 24px; }
.footer-legal a { color: var(--text-muted); font-size: 0.875rem; text-decoration: none; }
.footer-legal a:hover { color: var(--accent); }

/* ==================== 17. FORMS ==================== */
.input-2026 {
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    transition: all var(--duration-fast) var(--ease-out);
    box-shadow: var(--shadow-inset);
    width: 100%;
}
.input-2026:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: var(--shadow-inset), 0 0 0 4px var(--accent-glow);
}
.input-2026::placeholder { color: var(--text-muted); }
textarea.input-2026 { resize: vertical; min-height: 100px; }

.form-label-2026 {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 0.875rem;
    display: block;
}

select.input-2026 {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236b6b80' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 44px;
}

/* ==================== 18. CITY MODAL ==================== */
.city-search-wrapper { position: relative; }
.city-search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 1;
}
.city-search-input { padding-left: 46px !important; }

.city-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 10px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 4px;
}

.city-btn {
    width: 100%;
    padding: 10px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    text-align: left;
}
.city-btn:hover {
    background: var(--accent-gradient);
    border-color: var(--accent);
    color: white;
}
.city-btn--popular {
    border-color: var(--border-hover);
    font-weight: 600;
}
.city-btn--popular::after {
    content: '?';
    font-size: 0.7rem;
    float: right;
    opacity: 0.8;
}

/* ==================== 19. TOAST ==================== */
.otw-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px 24px;
    color: var(--text-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.3s var(--ease-out);
    max-width: 400px;
}
.otw-toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}
.otw-toast-close:hover { color: var(--text-primary); }

/* ==================== 20. BACKWARD COMPAT ==================== */
.navbar {
    background: var(--bg-card) !important;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: 16px 0 !important;
}
.navbar-brand {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800 !important;
}
.nav-link { color: var(--text-secondary) !important; transition: all var(--duration-fast) var(--ease-out); }
.nav-link:hover, .nav-link.active { color: var(--text-primary) !important; }

.btn-primary {
    background: var(--accent-gradient) !important;
    border: none !important;
    color: white !important;
    box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 40px var(--accent-glow) !important;
    color: white !important;
}

.card {
    background: var(--bg-card) !important;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-lg) !important;
    color: var(--text-primary);
}
.card-header {
    background: var(--bg-secondary) !important;
    border-bottom: 1px solid var(--border) !important;
    color: var(--text-primary);
}

.form-control, .form-select {
    background: var(--bg-secondary) !important;
    border: 2px solid var(--border) !important;
    border-radius: var(--radius-md) !important;
    color: var(--text-primary) !important;
    padding: 12px 16px;
    transition: all var(--duration-fast) var(--ease-out);
}
.form-control:focus, .form-select:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 4px var(--accent-glow) !important;
}
.form-control::placeholder { color: var(--text-muted); }

.text-primary { color: var(--accent) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-white { color: var(--text-primary) !important; }

.bg-primary { background: var(--accent-gradient) !important; }
.bg-secondary { background: var(--bg-secondary) !important; }
.bg-light { background: var(--bg-tertiary) !important; }
.bg-dark { background: var(--bg-tertiary) !important; }
.bg-white { background: var(--bg-secondary) !important; }

.modal-content {
    background: var(--bg-card) !important;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-lg);
    color: var(--text-primary);
}
.modal-header { border-bottom: 1px solid var(--border); color: var(--text-primary); padding: 24px 28px; }
.modal-body { padding: 28px; }
.modal-footer { border-top: 1px solid var(--border); }
.modal-title { color: var(--text-primary); font-weight: 700; }

hr { border-color: var(--border); }

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

.alert { border-radius: var(--radius-md); padding: 16px 20px; border: none; }
.alert-primary { background: rgba(255, 97, 29, 0.1); color: var(--accent); border: 1px solid rgba(255, 97, 29, 0.2); }
.alert-success { background: rgba(16, 185, 129, 0.1); color: #10b981; border: 1px solid rgba(16, 185, 129, 0.2); }
.alert-danger { background: rgba(239, 68, 68, 0.1); color: #ef4444; border: 1px solid rgba(239, 68, 68, 0.2); }

.badge { border-radius: var(--radius-sm); padding: 5px 12px; font-weight: 600; }

.dropdown-menu {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px;
}
.dropdown-item { color: var(--text-primary); border-radius: var(--radius-sm); padding: 8px 16px; }
.dropdown-item:hover { background: var(--bg-glass); color: var(--text-primary); }

.page-link {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
}
.page-link:hover { background: var(--accent-gradient); border-color: var(--accent); color: white; }
.page-item.active .page-link { background: var(--accent-gradient); border-color: var(--accent); color: white; }

.btn-close { filter: invert(1); }
[data-theme="light"] .btn-close { filter: invert(0); }

/* ==================== 21. RESPONSIVE ==================== */
@media (max-width: 1199.98px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1023.98px) {
    .bento-grid { grid-template-columns: repeat(2, 1fr); }
    .bento-item--large,
    .bento-item--medium,
    .bento-item--small { grid-column: span 1; }
}

@media (max-width: 767.98px) {
    :root { --section-padding: var(--section-padding-mobile); }

    .hero-2026 { min-height: auto; padding: calc(var(--navbar-height) + 60px) 0 80px; }
    .hero-2026--small { min-height: auto; padding: calc(var(--navbar-height) + 40px) 0 60px; }

    .bento-grid { grid-template-columns: 1fr; grid-auto-rows: auto; }
    .bento-item { grid-column: span 1 !important; grid-row: span 1 !important; }

    .hero-actions { flex-direction: column; align-items: center; }
    .btn-2026, .btn-glass-2026 { width: 100%; }

    .portfolio-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 36px; }

    .calculator-2026-inner { padding: 28px; }
    .calc-price { font-size: 2.25rem; }
    .mode-switcher { flex-direction: column; }

    .cta-section { padding: 48px 24px; }

    .footer-bottom { flex-direction: column; text-align: center; }
    .footer-legal { flex-direction: column; align-items: center; gap: 8px; }

    .navbar-nav-desktop { display: none; }
    .mobile-menu-toggle { display: flex; }
    .navbar-actions .btn-glass-2026,
    .navbar-actions .btn-2026 { display: none !important; }
}

@media (max-width: 575.98px) {
    .certificates-grid { grid-template-columns: repeat(2, 1fr); }
    .city-grid { grid-template-columns: 1fr 1fr; }
}

/* ==================== 22. REDUCED MOTION ==================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}