/* ========================================
   GLOBAL STYLES & RESET
   ======================================== */

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

:root {
    --color-primary: #10b981;
    --color-primary-dark: #059669;
    --color-dark: #0a0a0a;
    --color-charcoal: #1a1a1a;
    --color-charcoal-light: #2a2a2a;
    --color-light: #f8f9fa;
    --color-white: #ffffff;
    --color-text-dark: #1a1a1a;
    --color-text-light: #e5e7eb;
    --color-text-muted: #9ca3af;
    --color-border: #374151;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(16, 185, 129, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-img {
    display: block;
    width: 50px;
    height: 50px;
}

.nav-logo .logo-text {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-white);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link.cta-nav {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.6rem 1.5rem;
    border-radius: 4px;
}

.nav-link.cta-nav:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-white);
    transition: var(--transition);
    border-radius: 2px;
}

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

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

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

/* ========================================
   HERO SECTION
   ======================================== */

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    padding: 8rem 2rem 4rem;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1200px;
}

.hero-title {
    font-size: clamp(2rem, 8vw, 6rem);
    font-weight: 900;
    line-height: 1.15;
    color: var(--color-white);
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    word-wrap: break-word;
    hyphens: auto;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--color-text-muted);
    margin-bottom: 3rem;
    font-weight: 300;
    letter-spacing: 0.5px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 600px;
    margin: 0 auto;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.1rem;
}

.btn-reset {
    background: var(--color-charcoal-light);
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.btn-reset:hover {
    background: var(--color-charcoal);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ========================================
   SECTIONS
   ======================================== */

.section-dark {
    background: var(--color-charcoal);
    color: var(--color-text-light);
    padding: 6rem 2rem;
}

.section-light {
    background: var(--color-light);
    color: var(--color-text-dark);
    padding: 6rem 2rem;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-muted);
    font-weight: 300;
}

/* ========================================
   CALCULATOR SECTION
   ======================================== */

.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.calculator-controls {
    background: var(--color-charcoal-light);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

/* На десктопе порядок как в HTML */
.calc-control-group {
    order: 0;
}

.calc-control-group {
    margin-bottom: 2.5rem;
}

.control-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.control-icon {
    color: var(--color-primary);
    font-size: 1.25rem;
}

.control-label {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-light);
}

.slider-container {
    margin-top: 1rem;
}

.calc-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--color-charcoal);
    outline: none;
    margin-bottom: 1rem;
}

.calc-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.4);
}

.calc-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.6);
}

.calc-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.slider-value {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
}

.value-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-left: 0.5rem;
}

.time-slot-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.time-slot-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--color-charcoal);
    border: 2px solid var(--color-border);
    padding: 1.25rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--color-text-light);
    text-align: left;
}

.time-slot-btn i {
    font-size: 1.75rem;
    color: var(--color-text-muted);
    transition: var(--transition);
}

.time-slot-btn:hover {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.05);
}

.time-slot-btn:hover i {
    color: var(--color-primary);
}

.time-slot-btn.active {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.1);
}

.time-slot-btn.active i {
    color: var(--color-primary);
}

.slot-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.slot-name {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--color-text-light);
}

.slot-time {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.slot-multiplier {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-top: 0.25rem;
}

/* Calculator Result */

.calculator-result {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.result-card {
    background: linear-gradient(135deg, var(--color-charcoal-light) 0%, var(--color-charcoal) 100%);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.result-header h3 {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    font-weight: 500;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.result-total {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.currency {
    font-size: 2rem;
    color: var(--color-primary);
    font-weight: 700;
}

.total-amount {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-white);
    letter-spacing: -1px;
    transition: var(--transition);
}

.result-breakdown {
    border-top: 1px solid var(--color-border);
    padding-top: 1.5rem;
    margin-bottom: 1.5rem;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
}

.breakdown-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.breakdown-label i {
    color: var(--color-primary);
}

.breakdown-value {
    color: var(--color-text-light);
    font-weight: 600;
    font-size: 1rem;
}

.result-badges {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.result-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.discount-badge {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.surcharge-badge {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
    border: 1px solid #fbbf24;
}

.savings-info {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--color-primary);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

.savings-info i {
    color: var(--color-primary);
    font-size: 1.25rem;
}

.savings-info strong {
    color: var(--color-primary);
}

.calculation-info {
    background: var(--color-charcoal-light);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.calculation-info h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.calculation-info h4 i {
    color: var(--color-primary);
}

.calculation-info ul {
    list-style: none;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}

.calculation-info ul ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.calculation-info li {
    margin-bottom: 0.5rem;
}

.calculation-info strong {
    color: var(--color-text-light);
}

/* ========================================
   ABOUT SECTION
   ======================================== */

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.building-diagram {
    position: relative;
    padding: 2rem;
}

.building-base {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    aspect-ratio: 1;
    perspective: 1000px;
}

.led-face {
    position: absolute;
    background: linear-gradient(135deg, var(--color-charcoal) 0%, var(--color-charcoal-light) 100%);
    border: 3px solid var(--color-primary);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.led-front {
    top: 20%;
    left: 30%;
    width: 40%;
    height: 60%;
    z-index: 3;
}

.led-left {
    top: 15%;
    left: 5%;
    width: 30%;
    height: 70%;
    transform: rotateY(-20deg);
    z-index: 2;
}

.led-right {
    top: 15%;
    right: 5%;
    width: 30%;
    height: 70%;
    transform: rotateY(20deg);
    z-index: 1;
}

.led-face:hover {
    transform: scale(1.05) rotateY(0deg) !important;
    box-shadow: 0 0 40px rgba(16, 185, 129, 0.6);
    z-index: 10 !important;
}

.face-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.face-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    transition: var(--transition);
}

.led-face:hover .face-info {
    opacity: 1;
}

.face-info i {
    font-size: 2rem;
    color: var(--color-primary);
}

.face-info span {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

.diagram-caption {
    text-align: center;
    margin-top: 2rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

.about-text h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.about-text p {
    color: var(--color-text-muted);
    line-height: 1.8;
    font-size: 1.05rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.stat-card {
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-text-dark);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ========================================
   SPECS & PRICING
   ======================================== */

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.spec-card {
    background: var(--color-white);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.spec-icon {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.spec-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.spec-list {
    list-style: none;
}

.spec-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.spec-list li:last-child {
    border-bottom: none;
}

.spec-label {
    color: var(--color-text-muted);
    font-weight: 500;
}

.spec-value {
    color: var(--color-text-dark);
    font-weight: 600;
}

.spec-content p {
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.spec-highlight {
    background: rgba(16, 185, 129, 0.1);
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
    font-weight: 500;
}

.rotation-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.rotation-item {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.75rem 1.25rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    text-align: center;
}

.rotation-arrow {
    font-size: 1.5rem;
    color: var(--color-primary);
}

/* Pricing */

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--color-charcoal-light);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    padding: 2.5rem;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-primary);
}

.pricing-card.featured {
    border-color: var(--color-primary);
    box-shadow: 0 20px 60px rgba(16, 185, 129, 0.3);
}

.featured-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
}

.pricing-header h3 {
    font-size: 1.75rem;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.pricing-duration {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.pricing-body {
    margin: 2rem 0;
}

.price-amount {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.price-amount .currency {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.price-amount .amount {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-white);
}

.price-save {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.pricing-features {
    list-style: none;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-light);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features i {
    color: var(--color-primary);
}

.pricing-notes {
    max-width: 900px;
    margin: 3rem auto 0;
    text-align: center;
}

.pricing-notes p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.pricing-notes i {
    color: var(--color-primary);
}

/* ========================================
   REQUIREMENTS & BENEFITS
   ======================================== */

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.requirement-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    border: 2px solid #e5e7eb;
}

.requirement-card.prohibited {
    border-color: #ef4444;
}

.requirement-card.warning {
    border-color: #f59e0b;
    background: #fffbeb;
}

.requirement-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.requirement-card.prohibited i {
    color: #ef4444;
}

.requirement-card.warning i {
    color: #f59e0b;
}

.requirement-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-dark);
}

.requirement-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background: var(--color-charcoal-light);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition);
}

.benefit-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-primary);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.benefit-icon i {
    font-size: 2.5rem;
    color: var(--color-primary);
}

.benefit-card h3 {
    font-size: 1.5rem;
    color: var(--color-white);
    margin-bottom: 1rem;
}

.benefit-card p {
    color: var(--color-text-muted);
    line-height: 1.8;
}

/* ========================================
   EXAMPLES & ORDER FORM
   ======================================== */

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.example-card {
    border-radius: 12px;
    overflow: hidden;
    background: var(--color-white);
    cursor: pointer;
    transition: var(--transition);
}

.example-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.example-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 3/2;
}

.example-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.example-card:hover .example-image img {
    transform: scale(1.1);
}

.example-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(16, 185, 129, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    opacity: 0;
    transition: var(--transition);
}

.example-card:hover .example-overlay {
    opacity: 1;
}

.example-overlay i {
    font-size: 3rem;
    color: var(--color-white);
}

.example-overlay span {
    color: var(--color-white);
    font-weight: 600;
    font-size: 1.1rem;
}

.example-info {
    padding: 1.5rem;
}

.example-category {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.example-info h4 {
    font-size: 1.1rem;
    color: var(--color-text-dark);
}

/* Order Form */

.order-form-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.order-form {
    background: var(--color-charcoal-light);
    padding: 3rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.form-group label {
    color: var(--color-text-light);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group label i {
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--color-charcoal);
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
    padding: 1rem;
    border-radius: 6px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.file-upload-wrapper {
    position: relative;
}

.file-upload-wrapper input[type="file"] {
    opacity: 0;
    position: absolute;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: var(--color-charcoal);
    border: 2px dashed var(--color-border);
    padding: 2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.file-upload-label:hover {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.05);
}

.file-upload-label i {
    font-size: 3rem;
    color: var(--color-primary);
}

.file-upload-label span {
    color: var(--color-text-light);
    font-weight: 500;
}

.file-upload-label small {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.file-upload-name {
    margin-top: 0.75rem;
    color: var(--color-primary);
    font-weight: 500;
}

.form-summary {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--color-primary);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.form-summary h4 {
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-summary h4 i {
    color: var(--color-primary);
}

.form-summary p {
    color: var(--color-text-light);
    line-height: 1.8;
}

.order-success {
    text-align: center;
    padding: 3rem;
}

.success-icon {
    font-size: 5rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.order-success h3 {
    color: var(--color-white);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.order-success p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background: var(--color-dark);
    color: var(--color-text-light);
    padding: 3rem 2rem 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--color-white);
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.footer-section h4 {
    color: var(--color-white);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-section p {
    color: var(--color-text-muted);
    line-height: 1.8;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.footer-links i {
    color: var(--color-primary);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 1.5rem;
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ========================================
   LIGHTBOX
   ======================================== */

.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    justify-content: center;
    align-items: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-close {
    position: absolute;
    top: 2rem;
    right: 3rem;
    font-size: 3rem;
    color: var(--color-white);
    cursor: pointer;
    transition: var(--transition);
}

.lightbox-close:hover {
    color: var(--color-primary);
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 8px;
}

/* ========================================
   ANIMATIONS
   ======================================== */

.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-delay-1 {
    animation: fadeIn 1s ease-out 0.3s both;
}

.fade-in-delay-2 {
    animation: fadeIn 1s ease-out 0.6s both;
}

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

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .btn {
        min-height: 48px;
        padding: 1rem 2rem;
    }
    
    .time-slot-btn {
        min-height: 60px;
    }
    
    .nav-link {
        padding: 0.75rem 1rem;
        display: block;
    }
    
    /* Prevent double-tap zoom */
    * {
        touch-action: manipulation;
    }
    
    /* Better tap highlights */
    a, button, input, select, textarea {
        -webkit-tap-highlight-color: rgba(16, 185, 129, 0.2);
    }
    
    /* Disable hover effects on touch */
    .example-card:hover .example-overlay,
    .led-face:hover .face-info {
        opacity: 1;
    }
}

/* Tablet and below (1024px) */
@media (max-width: 1024px) {
    .calculator-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile landscape and below (768px) */
@media (max-width: 768px) {
    /* Navigation */
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-logo .logo-text {
        font-size: 1.25rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: rgba(10, 10, 10, 0.98);
        width: 100%;
        padding: 2rem;
        gap: 1rem;
        transition: var(--transition);
        height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    /* Hero Section */
    .hero-section {
        padding: 7rem 1.5rem 4rem;
        min-height: 90vh;
    }
    
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.15;
        margin-bottom: 1rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }
    
    .hero-buttons .btn {
        width: 100%;
        padding: 1rem 2rem;
    }
    
    .scroll-indicator {
        display: none;
    }
    
    /* Sections */
    .section-dark,
    .section-light {
        padding: 4rem 1.5rem;
    }
    
    .section-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    /* About Section */
    .about-grid {
        gap: 2rem;
    }
    
    .building-base {
        max-width: 280px;
    }
    
    .led-face {
        padding: 0.75rem;
    }
    
    .face-label {
        font-size: 0.6rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .about-text h3 {
        font-size: 1.5rem;
    }
    
    /* Calculator Section */
    .calculator-controls {
        padding: 1.5rem;
    }
    
    /* 
     * ВАЖНО: На мобильных устройствах меняем порядок элементов калькулятора:
     * 1. Время показа (3 кнопки) - самое важное, идёт первым
     * 2. Длительность кампании (слайдер)
     * 3. Количество показов (слайдер)
     * 4. Результат расчёта (сразу после слайдеров)
     */
    .calc-time-slot {
        order: 1; /* Время показа - первым */
    }
    
    .calc-slider-item:nth-of-type(2) {
        order: 2; /* Длительность - вторым */
    }
    
    .calc-slider-item:nth-of-type(3) {
        order: 3; /* Количество показов - третьим */
    }
    
    .btn-reset {
        order: 4; /* Кнопка сброса - последней */
    }
    
    .calc-control-group {
        margin-bottom: 2rem;
    }
    
    .control-header {
        flex-wrap: wrap;
        margin-bottom: 1rem;
    }
    
    .control-label {
        font-size: 1rem;
        word-break: break-word;
    }
    
    .slider-value {
        font-size: 1.5rem;
    }
    
    .value-unit {
        font-size: 0.9rem;
        display: inline-block;
    }
    
    .time-slot-buttons {
        gap: 0.75rem;
    }
    
    .time-slot-btn {
        padding: 1rem;
        flex-direction: row;
        align-items: center;
        text-align: left;
        min-height: auto;
    }
    
    .time-slot-btn i {
        font-size: 1.5rem;
        min-width: 40px;
        flex-shrink: 0;
    }
    
    .slot-info {
        text-align: left;
        flex: 1;
    }
    
    .slot-name {
        font-size: 0.95rem;
        display: block;
    }
    
    .slot-time {
        font-size: 0.8rem;
        display: block;
        margin-top: 0.125rem;
    }
    
    .slot-multiplier {
        font-size: 0.8rem;
        margin-top: 0.25rem;
        display: block;
    }
    
    .btn-reset {
        width: 100%;
        justify-content: center;
    }
    
    .calculator-result {
        gap: 1.5rem;
    }
    
    .result-card {
        padding: 1.5rem;
    }
    
    .result-header h3 {
        font-size: 1rem;
    }
    
    .result-total {
        margin-bottom: 1.5rem;
        flex-wrap: wrap;
    }
    
    .currency {
        font-size: 1.5rem;
    }
    
    .total-amount {
        font-size: 2.5rem;
        word-break: break-all;
    }
    
    .breakdown-label {
        font-size: 0.85rem;
    }
    
    .breakdown-value {
        font-size: 0.9rem;
        text-align: right;
    }
    
    .result-badges {
        gap: 0.5rem;
        flex-wrap: wrap;
    }
    
    .result-badge {
        font-size: 0.75rem;
        padding: 0.4rem 0.8rem;
        white-space: nowrap;
    }
    
    .savings-info {
        font-size: 0.85rem;
        flex-wrap: wrap;
    }
    
    .calculation-info {
        padding: 1rem;
    }
    
    .calculation-info h4 {
        font-size: 0.9rem;
    }
    
    .calculation-info ul {
        font-size: 0.8rem;
    }
    
    /* Specs */
    .spec-card {
        padding: 1.5rem;
    }
    
    .spec-icon {
        font-size: 2rem;
    }
    
    .spec-card h3 {
        font-size: 1.25rem;
    }
    
    .spec-list li {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .rotation-visual {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .rotation-arrow {
        transform: rotate(90deg);
    }
    
    /* Pricing */
    .pricing-card {
        padding: 2rem;
    }
    
    .price-amount .amount {
        font-size: 2.5rem;
    }
    
    .featured-badge {
        top: -12px;
        right: 15px;
        font-size: 0.8rem;
        padding: 0.4rem 1rem;
    }
    
    /* Requirements & Benefits */
    .requirements-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .requirement-card,
    .benefit-card {
        padding: 1.5rem;
    }
    
    /* Examples */
    .examples-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    /* Form */
    .order-form {
        padding: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 1rem;
    }
    
    .form-group label {
        font-size: 0.95rem;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 0.875rem;
        font-size: 0.95rem;
    }
    
    .file-upload-label {
        padding: 1.5rem;
    }
    
    .file-upload-label i {
        font-size: 2.5rem;
    }
    
    .form-summary {
        padding: 1rem;
    }
    
    /* Footer */
    .footer {
        padding: 2.5rem 1.5rem 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    /* Lightbox */
    .lightbox-close {
        top: 1rem;
        right: 1rem;
        font-size: 2.5rem;
    }
}

/* Small mobile (480px) */
@media (max-width: 480px) {
    /* Global */
    html {
        font-size: 15px;
    }
    
    /* Hero */
    .hero-section {
        padding: 6rem 1rem 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
        letter-spacing: -1px;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
    }
    
    /* Sections */
    .section-dark,
    .section-light {
        padding: 3rem 1rem;
    }
    
    .section-header {
        margin-bottom: 2.5rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-subtitle {
        font-size: 0.95rem;
    }
    
    .container {
        padding: 0;
    }
    
    /* About */
    .building-base {
        max-width: 240px;
    }
    
    .stat-card {
        padding: 1.25rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-icon {
        font-size: 1.75rem;
    }
    
    /* Calculator */
    .calculator-controls {
        padding: 1.25rem;
        border-radius: 8px;
    }
    
    .calc-control-group {
        margin-bottom: 1.75rem;
    }
    
    .control-icon {
        font-size: 1.1rem;
    }
    
    .control-label {
        font-size: 0.95rem;
    }
    
    .slider-value {
        font-size: 1.35rem;
    }
    
    .time-slot-btn {
        padding: 0.875rem;
    }
    
    .time-slot-btn i {
        font-size: 1.35rem;
        min-width: 35px;
    }
    
    .slot-name {
        font-size: 0.9rem;
    }
    
    .slot-time {
        font-size: 0.75rem;
    }
    
    .slot-multiplier {
        font-size: 0.75rem;
    }
    
    .btn-reset {
        padding: 0.65rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .result-card {
        padding: 1.25rem;
        border-radius: 8px;
    }
    
    .result-header h3 {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }
    
    .result-total {
        margin-bottom: 1.25rem;
    }
    
    .currency {
        font-size: 1.25rem;
    }
    
    .total-amount {
        font-size: 2rem;
    }
    
    .breakdown-label {
        font-size: 0.8rem;
    }
    
    .breakdown-value {
        font-size: 0.85rem;
    }
    
    .breakdown-item {
        padding: 0.6rem 0;
    }
    
    .result-badge {
        font-size: 0.7rem;
        padding: 0.35rem 0.7rem;
    }
    
    .savings-info {
        padding: 0.875rem;
        font-size: 0.85rem;
    }
    
    .savings-info i {
        font-size: 1.1rem;
    }
    
    .calculation-info {
        padding: 0.875rem;
    }
    
    .calculation-info h4 {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }
    
    .calculation-info ul {
        font-size: 0.75rem;
        line-height: 1.6;
    }
    
    .calculation-info ul ul {
        margin-left: 1rem;
    }
    
    /* Specs */
    .spec-card {
        padding: 1.25rem;
    }
    
    .spec-card h3 {
        font-size: 1.15rem;
    }
    
    .spec-list li {
        padding: 0.6rem 0;
        font-size: 0.9rem;
    }
    
    .rotation-item {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }
    
    /* Pricing */
    .pricing-card {
        padding: 1.75rem;
    }
    
    .pricing-header h3 {
        font-size: 1.5rem;
    }
    
    .price-amount .amount {
        font-size: 2.25rem;
    }
    
    .price-amount .currency {
        font-size: 1.25rem;
    }
    
    /* Requirements & Benefits */
    .requirement-card,
    .benefit-card {
        padding: 1.25rem;
    }
    
    .requirement-card i,
    .benefit-icon i {
        font-size: 2.5rem;
    }
    
    .benefit-icon {
        width: 70px;
        height: 70px;
    }
    
    .requirement-card h4,
    .benefit-card h3 {
        font-size: 1rem;
    }
    
    /* Form */
    .order-form-wrapper {
        max-width: 100%;
    }
    
    .order-form {
        padding: 1.5rem;
        border-radius: 8px;
    }
    
    .form-group label {
        font-size: 0.9rem;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 0.8rem;
        font-size: 0.9rem;
    }
    
    .file-upload-label {
        padding: 1.25rem;
    }
    
    .file-upload-label i {
        font-size: 2.25rem;
    }
    
    .file-upload-label span {
        font-size: 0.9rem;
    }
    
    .file-upload-label small {
        font-size: 0.75rem;
    }
    
    .btn {
        padding: 0.875rem 2rem;
        font-size: 0.95rem;
    }
    
    .btn-large {
        padding: 1rem 2rem;
        font-size: 1rem;
    }
    
    /* Footer */
    .footer {
        padding: 2rem 1rem 1rem;
    }
    
    .footer-logo {
        font-size: 1.5rem;
    }
    
    .footer-section h4 {
        font-size: 1rem;
    }
    
    .footer-links a {
        font-size: 0.9rem;
    }
    
    .footer-bottom p {
        font-size: 0.8rem;
        line-height: 1.5;
    }
}

/* Extra small mobile (360px) */
@media (max-width: 360px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .total-amount {
        font-size: 1.75rem;
    }
    
    .price-amount .amount {
        font-size: 2rem;
    }
    
    .calculator-controls,
    .result-card {
        padding: 1rem;
    }
    
    .time-slot-btn {
        padding: 0.75rem;
    }
    
    .order-form {
        padding: 1.25rem;
    }
}

.btn-f1 {
    flex: 1;
    justify-content: center;
    padding: 15px 0;
}

.btn-submit {
    margin-top: 24px;
    align-self: end;
}