/* ========================================
   OPI Conseils — Modern Tech Design
   ======================================== */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-card: #16161f;
    --bg-card-hover: #1c1c28;
    --text-primary: #f0f0f5;
    --text-secondary: #9898a8;
    --text-muted: #5a5a6e;
    --accent: #00cffd;
    --accent-2: #7b61ff;
    --accent-3: #ff6b6b;
    --gradient: linear-gradient(135deg, #00cffd 0%, #7b61ff 100%);
    --gradient-text: linear-gradient(135deg, #00cffd 0%, #7b61ff 50%, #ff6bdd 100%);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(0, 207, 253, 0.3);
    --radius: 16px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(0, 207, 253, 0.15);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 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);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

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

/* Particles Canvas */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.3rem;
    z-index: 1001;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: var(--transition);
}

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

.nav-cta {
    background: var(--gradient);
    color: var(--bg-primary) !important;
    padding: 8px 20px;
    border-radius: 100px;
    font-weight: 600;
    -webkit-text-fill-color: var(--bg-primary);
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
    border-radius: 2px;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 207, 253, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 207, 253, 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%);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 207, 253, 0.08);
    border: 1px solid rgba(0, 207, 253, 0.2);
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.2rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease 0.1s both;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.8;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
    animation: fadeInUp 0.6s ease 0.3s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font);
}

.btn-primary {
    background: var(--gradient);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(0, 207, 253, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 207, 253, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-hover);
}

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

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

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

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--gradient);
    animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ========================================
   Section Common
   ======================================== */
.section {
    padding: 120px 0;
    position: relative;
}

.section-dark {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent);
    margin-bottom: 16px;
    font-family: var(--font-mono);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========================================
   About Grid
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    transition: var(--transition);
}

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

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(0, 207, 253, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent);
}

.about-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========================================
   Use Cases Grid
   ======================================== */
.usecases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.usecase-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.usecase-icon {
    color: var(--accent);
    margin-bottom: 16px;
}

.usecase-tag {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 8px;
    font-family: var(--font-mono);
}

.usecase-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.usecase-list {
    list-style: none;
    margin-bottom: 20px;
    flex: 1;
}

.usecase-list li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    line-height: 1.5;
}

.usecase-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.6;
}

.usecase-gain {
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.gain-badge {
    background: rgba(0, 207, 253, 0.1);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 100px;
    font-weight: 700;
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

/* ========================================
   AI Models Grid
   ======================================== */
.models-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.model-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
}

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

.model-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.model-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    letter-spacing: 1px;
    flex-shrink: 0;
}

.model-icon.llm { background: rgba(0, 207, 253, 0.15); color: #00cffd; }
.model-icon.vision { background: rgba(123, 97, 255, 0.15); color: #7b61ff; }
.model-icon.ml { background: rgba(255, 107, 107, 0.15); color: #ff6b6b; }
.model-icon.nlp { background: rgba(0, 207, 160, 0.15); color: #00cfa0; }
.model-icon.agents { background: rgba(255, 183, 77, 0.15); color: #ffb74d; }
.model-icon.genai { background: rgba(255, 107, 221, 0.15); color: #ff6bdd; }

.model-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
}

.model-card > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.model-techs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.tech-tag {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.model-usecases {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.model-usecases strong {
    color: var(--text-secondary);
}

/* ========================================
   Founder Section
   ======================================== */
.founder-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 64px;
    align-items: center;
}

.photo-frame {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: var(--gradient);
    padding: 3px;
    margin: 0 auto;
    overflow: hidden;
}

.founder-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
}

.founder-socials {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 24px;
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(0, 207, 253, 0.08);
}

.founder-info h3 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.founder-role {
    font-size: 1.05rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 24px;
}

.founder-bio {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.founder-bio strong {
    color: var(--text-primary);
}

.founder-highlights {
    display: flex;
    gap: 32px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.highlight {
    text-align: center;
}

.highlight-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-mono);
}

.highlight-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   Nantes Section
   ======================================== */
.nantes-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.nantes-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.nantes-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
}

.nantes-card:hover {
    border-color: var(--border-hover);
}

.nantes-icon {
    color: var(--accent);
    margin-bottom: 12px;
}

.nantes-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.nantes-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.map-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    position: relative;
    overflow: hidden;
    height: 100%;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.map-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.map-pin {
    position: relative;
}

.pin-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 207, 253, 0.2);
    animation: pin-pulse 2s infinite;
}

@keyframes pin-pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(2); opacity: 0; }
}

.map-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
}

.map-visual {
    width: 100%;
    max-width: 300px;
}

.france-map {
    width: 100%;
    height: auto;
}

.nantes-dot {
    animation: nantes-glow 2s infinite;
}

@keyframes nantes-glow {
    0%, 100% { filter: drop-shadow(0 0 4px var(--accent)); }
    50% { filter: drop-shadow(0 0 12px var(--accent)); }
}

.nantes-ring {
    animation: nantes-ring-anim 2s infinite;
}

@keyframes nantes-ring-anim {
    0% { r: 16; opacity: 0.5; }
    100% { r: 30; opacity: 0; }
}

/* ========================================
   Contact Section
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: start;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: var(--transition);
    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);
    box-shadow: 0 0 0 3px rgba(0, 207, 253, 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='%239898a8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

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

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}

.info-icon {
    color: var(--accent);
    margin-bottom: 12px;
}

.info-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.info-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.process-steps {
    list-style: none;
    counter-reset: step;
}

.process-steps li {
    counter-increment: step;
    padding: 8px 0;
    padding-left: 36px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.process-steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 8px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0, 207, 253, 0.1);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ========================================
   Modal
   ======================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px;
    text-align: center;
    max-width: 440px;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-icon {
    margin-bottom: 20px;
}

.modal-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

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

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

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 16px;
    line-height: 1.7;
}

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

.footer-links h4 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].visible {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].visible {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-left"].visible {
    transform: translateX(0);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .usecases-grid,
    .models-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 24px;
        transition: var(--transition);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-link {
        font-size: 1.2rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

    .about-grid,
    .usecases-grid,
    .models-grid {
        grid-template-columns: 1fr;
    }

    .founder-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .founder-highlights {
        justify-content: center;
    }

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

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

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .section {
        padding: 80px 0;
    }

    .hero-scroll {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .contact-form {
        padding: 24px;
    }
}