/**
 * LiFePO4 Landing Page Styles
 * Used by: /support/docs/lifepo4/index.php
 *
 * Marketing/product landing page with hero, benefits, specs, and contact form.
 * Note: CSS variables defined here override ds4a.css base variables.
 */

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --accent-orange: #ff6b2c;
    --accent-orange-dark: #d45520;
    --accent-blue: #2d9cdb;
    --accent-green: #27ae60;
    --border-color: #2a2a2a;
    --gradient-hero: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 50%, #111 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Barlow', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Noise texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 1000;
}

/* Typography */
h1, h2, h3, .display {
    font-family: 'Bebas Neue', sans-serif;
    letter-spacing: 0.02em;
    line-height: 1.1;
}

.section-label {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-orange);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-label::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--accent-orange);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 36px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--accent-orange);
}

.uk-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    padding: 0.4rem 0.75rem;
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #fff;
}

.uk-badge svg {
    width: 20px;
    height: 12px;
    border-radius: 2px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.uk-trust-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #2a2a2a;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.trust-item svg {
    width: 20px;
    height: 12px;
    border-radius: 2px;
}

.trust-icon {
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 6rem 4rem 4rem;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(255, 107, 44, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-tagline {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.1rem;
}

.hero-tagline .tagline-4 {
    display: inline-block;
    width: 1.4em;
    height: 1.4em;
    vertical-align: middle;
    margin: 0 0.05em;
}

.hero h1 {
    font-size: clamp(3.5rem, 8vw, 7rem);
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #cccccc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--accent-orange) 0%, #ff8f5c 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 2.5rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stat {
    text-align: left;
}

.stat-value {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 3rem;
    color: var(--accent-orange);
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-image {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    width: 100%;
    max-width: 600px;
    border-radius: 12px;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5),
                0 0 0 1px rgba(255, 255, 255, 0.05);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.cta-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 1rem 2rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--accent-orange);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--accent-orange-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 44, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--accent-orange);
    color: var(--accent-orange);
}

/* Section Styles */
section {
    padding: 6rem 4rem;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Why LiFePO4 Section */
.why-lifepo4 {
    background: var(--bg-secondary);
    position: relative;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.comparison-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.comparison-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-orange);
}

.comparison-card.featured {
    border-color: var(--accent-orange);
    background: linear-gradient(135deg, rgba(255, 107, 44, 0.1) 0%, var(--bg-tertiary) 100%);
}

.comparison-card.featured::before {
    content: 'RECOMMENDED';
    position: absolute;
    top: 1rem;
    right: -2rem;
    background: var(--accent-orange);
    color: var(--bg-primary);
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    padding: 0.3rem 2.5rem;
    transform: rotate(45deg);
}

.comparison-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.comparison-card .chemistry {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

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

.comparison-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

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

.comparison-list .icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.icon-check { color: var(--accent-green); }
.icon-warning { color: #f39c12; }
.icon-cross { color: #e74c3c; }

/* Benefits Section */
.benefits {
    background: var(--bg-primary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.benefit-card {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.benefit-card:hover {
    border-color: var(--accent-orange);
    transform: translateY(-5px);
}

.benefit-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    background: rgba(255, 107, 44, 0.1);
    border: 1px solid rgba(255, 107, 44, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.benefit-card h4 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Products Section */
.products {
    background: var(--bg-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.product-card:hover {
    border-color: var(--accent-orange);
    transform: translateY(-5px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}

.product-image {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--accent-orange);
    color: var(--bg-primary);
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
}

.product-content {
    padding: 2rem;
}

.product-name {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.product-subtitle {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.product-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.spec-item {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.spec-value {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    color: var(--accent-orange);
    line-height: 1;
}

.spec-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.product-features {
    list-style: none;
    margin-bottom: 1.5rem;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.product-features .check {
    color: var(--accent-green);
}

/* BMS Section */
.bms-section {
    background: var(--bg-primary);
    position: relative;
}

.bms-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.bms-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1.5rem;
}

.bms-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.bms-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.bms-feature {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.bms-feature-icon {
    width: 36px;
    height: 36px;
    background: rgba(255, 107, 44, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.9rem;
}

.bms-feature h4 {
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.bms-feature p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
}

.bms-visual {
    position: relative;
}

.bms-phone-mockup {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 24px;
    padding: 1.5rem;
    max-width: 300px;
    margin: 0 auto;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.phone-header {
    text-align: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.phone-header h5 {
    font-family: 'Barlow', sans-serif;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.phone-battery {
    text-align: center;
    margin-bottom: 1.5rem;
}

.battery-percentage {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 4rem;
    color: var(--accent-green);
}

.battery-status {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.phone-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.phone-stat {
    background: var(--bg-secondary);
    padding: 0.75rem;
    border-radius: 8px;
    text-align: center;
}

.phone-stat-value {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.25rem;
    color: var(--accent-orange);
}

.phone-stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Applications Section */
.applications {
    background: var(--bg-secondary);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.app-card {
    position: relative;
    height: 300px;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
}

.app-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.app-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.3) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
}

.app-card h4 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.app-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Specs Table Section */
.specs-section {
    background: var(--bg-primary);
}

.specs-table-container {
    max-width: 1000px;
    margin: 0 auto;
    overflow-x: auto;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
}

.specs-table th,
.specs-table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.specs-table th {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: var(--bg-secondary);
}

.specs-table th:first-child {
    border-radius: 8px 0 0 0;
}

.specs-table th:last-child {
    border-radius: 0 8px 0 0;
}

.specs-table td {
    color: var(--text-secondary);
}

.specs-table td:first-child {
    color: var(--text-primary);
    font-weight: 500;
}

.specs-table tr:hover td {
    background: rgba(255, 107, 44, 0.05);
}

.specs-highlight {
    color: var(--accent-orange) !important;
    font-weight: 600;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
    text-align: center;
    padding: 6rem 4rem;
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-orange), transparent);
}

.cta-section h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-buttons-center {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Contact Form Styles */
.contact-form-container {
    max-width: 700px;
    margin: 0 auto;
    background: #1a1a1a;
    border: 1px solid #2a2a2a;
    border-radius: 12px;
    padding: 2.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #a0a0a0;
}

.form-input {
    font-family: 'Barlow', sans-serif;
    font-size: 1rem;
    background: #0a0a0a;
    color: #fff;
    border: 1px solid #2a2a2a;
    border-radius: 4px;
    padding: 0.875rem 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: #ff6b2c;
    box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.1);
}

.form-input::placeholder {
    color: #666;
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

select.form-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0a0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

select.form-input option {
    background: #0a0a0a;
    color: #fff;
}

.btn-submit {
    align-self: flex-start;
    padding: 1rem 2rem;
    font-size: 1rem;
    margin-top: 0.5rem;
}

.btn-submit .btn-icon {
    transition: transform 0.3s ease;
}

.btn-submit:hover .btn-icon {
    transform: translateX(4px);
}

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

.success-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
    margin: 0 auto 1.5rem;
}

.form-success h3 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.form-success p {
    color: #a0a0a0;
}

/* Responsive */
@media (max-width: 1200px) {
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .apps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 8rem 2rem 4rem;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-image {
        order: -1;
        margin-bottom: 2rem;
    }

    .hero-image img {
        max-width: 400px;
    }

    .hero-description {
        margin: 0 auto 2.5rem;
    }

    .cta-buttons {
        justify-content: center;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .bms-grid {
        grid-template-columns: 1fr;
    }

    .bms-visual {
        order: -1;
        margin-bottom: 2rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 4rem 1.5rem;
    }

    nav {
        padding: 1rem;
    }

    .nav-links {
        display: none;
    }

    .uk-badge {
        padding: 0.3rem 0.5rem;
        font-size: 0.7rem;
    }

    .uk-trust-bar {
        justify-content: center;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .apps-grid {
        grid-template-columns: 1fr;
    }

    .bms-features {
        grid-template-columns: 1fr;
    }

    .product-specs {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form-container {
        padding: 1.5rem;
    }

    .cta-buttons,
    .cta-buttons-center {
        flex-direction: column;
    }

    .specs-table th,
    .specs-table td {
        padding: 0.75rem;
        font-size: 0.85rem;
    }
}

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

.animate-on-scroll {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }