/* ============================================
   ИЭР — Инновационные Энергетические Решения
   Style.css | Dark Mode Default | 2025-2026
   ============================================ */

/* CSS Variables */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1623;
    --bg-tertiary: #141d2e;
    --bg-card: rgba(20, 29, 46, 0.6);
    --bg-card-hover: rgba(20, 29, 46, 0.9);
    --bg-glass: rgba(15, 22, 35, 0.85);

    --accent-primary: #3b82f6;
    --accent-secondary: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.3);
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: #60a5fa;

    --border-subtle: rgba(148, 163, 184, 0.08);
    --border-medium: rgba(148, 163, 184, 0.15);
    --border-accent: rgba(59, 130, 246, 0.3);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.menu-open {
    overflow: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 40px;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 64px;
    }
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom-color: var(--border-subtle);
    padding: 12px 0;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (min-width: 768px) {
    .nav-container {
        padding: 0 40px;
    }
}

@media (min-width: 1024px) {
    .nav-container {
        padding: 0 64px;
    }
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.logo-icon {
    width: 50px;
    height: 50px;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: 0.05em;
}

.logo:hover .logo-icon {
transform: rotate(360deg);
}

/* Nav Links */
.nav-links {
    display: none;
    gap: 32px;
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-base);
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

@media (min-width: 1024px) {
    .nav-links {
        display: flex;
    }
}

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-phone {
    display: none;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.nav-phone:hover {
    color: var(--accent-secondary);
}

.nav-phone svg {
    flex-shrink: 0;
    color: var(--accent-primary);
}

@media (min-width: 768px) {
    .nav-phone {
        display: flex;
    }
}

/* Menu Toggle */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }
}

/* Mobile Menu */
.nav-links.active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    padding: 100px 40px 40px;
    gap: 0;
    z-index: 999;
}

.nav-links.active a {
    font-size: 1.5rem;
    font-weight: 600;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-primary);
}

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 8s ease-in-out infinite;
}

.glow-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-primary);
    top: -10%;
    right: -10%;
    animation-delay: 0s;
}

.glow-2 {
    width: 400px;
    height: 400px;
    background: #06b6d4;
    bottom: -10%;
    left: -10%;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-medium);
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 32px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards 0.2s;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    box-shadow: 0 0 8px #22c55e;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    text-align: left;
}

.hero-title .line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
}

.hero-title .line:nth-child(1) { animation: fadeInUp 0.7s ease forwards 0.3s; }
.hero-title .line:nth-child(2) { animation: fadeInUp 0.7s ease forwards 0.45s; }
.hero-title .line:nth-child(3) { animation: fadeInUp 0.7s ease forwards 0.6s; }

.hero-title .accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 0 48px;
    line-height: 1.7;
    opacity: 0;
    animation: fadeInUp 0.7s ease forwards 0.75s;
    text-align: left;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 48px;
    opacity: 0;
    animation: fadeInUp 0.7s ease forwards 0.9s;
}

.stat-item {
    text-align: center;
}

.stat-num {
    font-family: var(--font-mono);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-suffix {
    font-family: var(--font-mono);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-medium);
}

@media (max-width: 640px) {
    .stat-divider {
        display: none;
    }
    .hero-stats {
        gap: 16px 32px;
    }
}

/* Hero CTA */
.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.7s ease forwards 1.05s;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-medium);
}

.btn-ghost:hover {
    background: var(--bg-card);
    border-color: var(--border-accent);
    color: var(--accent-secondary);
}

.btn-full {
    width: 100%;
}

/* Hero Scroll */
.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-indicator span {
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--border-medium);
    position: relative;
    overflow: hidden;
}

.scroll-dot {
    width: 3px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 2px;
    position: absolute;
    top: 0;
    left: -1px;
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { top: -12px; opacity: 0; }
    30% { opacity: 1; }
    70% { opacity: 1; }
    100% { top: 40px; opacity: 0; }
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: 100px 0;
    position: relative;
}

@media (min-width: 768px) {
    .section {
        padding: 140px 0;
    }
}

.section-header {
    margin-bottom: 64px;
}

.section-header.left {
    text-align: left;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-title .accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Stagger for children */
.service-card.reveal { transition-delay: 0s; }
.service-card.reveal:nth-child(2) { transition-delay: 0.1s; }
.service-card.reveal:nth-child(3) { transition-delay: 0.2s; }
.service-card.reveal:nth-child(4) { transition-delay: 0.3s; }

.project-card.reveal { transition-delay: 0s; }
.project-card.reveal:nth-child(2) { transition-delay: 0.1s; }
.project-card.reveal:nth-child(3) { transition-delay: 0.15s; }
.project-card.reveal:nth-child(4) { transition-delay: 0.2s; }
.project-card.reveal:nth-child(5) { transition-delay: 0.25s; }

.cert-card.reveal { transition-delay: 0s; }
.cert-card.reveal:nth-child(2) { transition-delay: 0.08s; }
.cert-card.reveal:nth-child(3) { transition-delay: 0.16s; }
.cert-card.reveal:nth-child(4) { transition-delay: 0.24s; }
.cert-card.reveal:nth-child(5) { transition-delay: 0.32s; }
.cert-card.reveal:nth-child(6) { transition-delay: 0.4s; }

.about-card.reveal { transition-delay: 0s; }
.about-card.reveal:nth-child(2) { transition-delay: 0.1s; }
.about-card.reveal:nth-child(3) { transition-delay: 0.2s; }
.about-card.reveal:nth-child(4) { transition-delay: 0.3s; }

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    gap: 64px;
}

@media (min-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
}

.about-text .lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.about-text .lead strong {
    color: var(--text-primary);
    font-weight: 700;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.7;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.feature-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-accent);
    transform: translateX(4px);
}

.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-sm);
    color: var(--accent-primary);
    flex-shrink: 0;
}

.feature-item strong {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.feature-item span {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* About Visual */
.about-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.about-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 28px;
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.card-accent {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    opacity: 0.6;
    transition: opacity var(--transition-base);
}

.about-card:hover .card-accent {
    opacity: 1;
}

.card-number {
    font-family: var(--font-mono);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.card-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
    background: var(--bg-primary);
}

.services-grid {
    display: grid;
    gap: 24px;
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--accent-gradient);
    transition: height var(--transition-slow);
    opacity: 0.1;
}

.service-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.service-card:hover::before {
    height: 100%;
}

.service-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
}

.service-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
    transition: all var(--transition-base);
}

.service-card:hover .service-icon {
    background: rgba(59, 130, 246, 0.15);
    transform: scale(1.05);
}

.service-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.3;
}

.service-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.6;
    flex-grow: 1;
}

.service-list {
    margin-bottom: 24px;
}

.service-list li {
    position: relative;
    padding-left: 16px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.5;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 5px;
    height: 5px;
    background: var(--accent-primary);
    border-radius: 50%;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    transition: all var(--transition-fast);
    margin-top: auto;
}

.service-link svg {
    transition: transform var(--transition-fast);
}

.service-link:hover {
    color: var(--accent-secondary);
}

.service-link:hover svg {
    transform: translateX(4px);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    gap: 24px;
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .project-card.large {
        grid-column: span 2;
        grid-row: span 2;
    }
}

.project-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.project-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.project-card.large .project-image {
    aspect-ratio: 16/10;
}

@media (min-width: 1024px) {
    .project-card.large .project-image {
        aspect-ratio: 16/10;
    }
}

.project-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    opacity: 0.3;
    transition: all var(--transition-base);
}

.project-card:hover .project-placeholder {
    opacity: 0.5;
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, var(--bg-secondary) 0%, transparent 60%);
    transition: opacity var(--transition-base);
}

.project-card:hover .project-overlay {
    background: linear-gradient(to top, var(--bg-secondary) 0%, transparent 40%);
}

.project-info {
    padding: 24px;
    position: relative;
    z-index: 1;
}

.project-tag {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 100px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.project-info h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.project-info p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
}

.project-meta {
    display: flex;
    gap: 16px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.project-meta span {
    position: relative;
}

.project-meta span:not(:last-child)::after {
    content: '•';
    position: absolute;
    right: -12px;
    top: 0;
}

/* ============================================
   CERTIFICATES SECTION
   ============================================ */
.certificates {
    background: var(--bg-primary);
}

.certificates-grid {
    display: grid;
    gap: 20px;
}

@media (min-width: 640px) {
    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .certificates-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.cert-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-base);
    transform-origin: left;
}

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

.cert-card:hover::after {
    transform: scaleX(1);
}

.cert-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
    margin-bottom: 20px;
    transition: all var(--transition-base);
}

.cert-card:hover .cert-icon {
    background: rgba(59, 130, 246, 0.15);
    transform: scale(1.08);
}

.cert-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
}

.cert-card p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
}

.cert-num {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent-primary);
    padding: 4px 10px;
    background: rgba(59, 130, 246, 0.08);
    border-radius: 100px;
}

/* ============================================
   CONTACTS SECTION
   ============================================ */
.contacts {
    background: var(--bg-secondary);
}

.contacts-grid {
    display: grid;
    gap: 64px;
}

@media (min-width: 1024px) {
    .contacts-grid {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }
}

.contacts-lead {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
    max-width: 480px;
}

.contacts-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-sm);
    color: var(--accent-primary);
    flex-shrink: 0;
    transition: all var(--transition-base);
}

.contact-item:hover .contact-icon {
    background: rgba(59, 130, 246, 0.15);
    transform: scale(1.05);
}

.contact-item strong {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-size: 0.875rem;
}

.contact-item span,
.contact-item a {
    display: block;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.5;
    transition: color var(--transition-fast);
}

.contact-item a:hover {
    color: var(--accent-secondary);
}

/* Form */
.contacts-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 40px;
    transition: all var(--transition-base);
}

.contacts-form-wrapper:hover {
    border-color: var(--border-accent);
}

@media (max-width: 640px) {
    .contacts-form-wrapper {
        padding: 24px;
    }
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: all var(--transition-base);
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-group select option {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 16px;
}

/* Статус формы */
.form-status {
    padding: 12px 16px;
    border-radius: var(--radius-md, 8px);
    font-size: 0.875rem;
    margin-bottom: 16px;
    text-align: center;
    font-weight: 500;
}

.form-status.success {
    background-color: rgba(34, 197, 94, 0.1); /* Светло-зеленый фон */
    color: #166534; /* Темно-зеленый текст */
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-status.error {
    background-color: rgba(239, 68, 68, 0.1); /* Светло-красный фон */
    color: #991b1b; /* Темно-красный текст */
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Состояние кнопки при отправке */
.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-subtle);
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    gap: 48px;
    margin-bottom: 48px;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
    }
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 320px;
}

.footer-nav h4,
.footer-contacts h4 {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-nav ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-nav a {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
    position: relative;
}

.footer-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-primary);
    transition: width var(--transition-base);
}

.footer-nav a:hover {
    color: var(--text-primary);
}

.footer-nav a:hover::after {
    width: 100%;
}

.footer-contacts p,
.footer-contacts a {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    transition: color var(--transition-fast);
}

.footer-contacts a:hover {
    color: var(--accent-secondary);
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 32px;
    border-top: 1px solid var(--border-subtle);
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.footer-bottom p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

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

/* Smooth scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Selection */
::selection {
    background: rgba(59, 130, 246, 0.3);
    color: var(--text-primary);
}