/* ========================================
   OTRAB — Design System
   ======================================== */

   :root {
    --bg: #F4E7DF;
    --bg-alt: #EDE0D6;
    --surface: #FFFFFF;
    --accent: #DE7356;
    --accent-dark: #C55A3B;
    --accent-light: #E8A88C;
    --text: #1F1F1F;
    --text-muted: #5E5E5E;
    --border: #D9C8BC;
    --shadow: 0 4px 24px rgba(31, 31, 31, 0.06);
    --shadow-lg: 0 12px 40px rgba(31, 31, 31, 0.10);
    --radius: 14px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --max-width: 1200px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* Utilities */
.container {
    width: 92%;
    max-width: var(--max-width);
    margin-inline: auto;
}

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--transition), transform 0.7s var(--transition);
}

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

/* ========================================
   Header
   ======================================== */

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    background: rgba(244, 231, 223, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
    border-color: var(--border);
    box-shadow: var(--shadow);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.logo-icon {
    color: var(--accent);
    display: flex;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

.menu-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.menu-toggle[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

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

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition);
}

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

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

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

.nav-cta {
    background: var(--accent);
    color: #fff;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

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

.nav-cta:hover {
    background: var(--accent-dark);
    color: #fff;
}

/* ========================================
   Hero
   ======================================== */

.hero {
    position: relative;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
}

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

.orbit {
    position: absolute;
    border: 1.5px solid var(--border);
    border-radius: 50%;
    opacity: 0.4;
    animation: orbit-rotate 60s linear infinite;
}

.orbit-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    right: -60px;
}

.orbit-2 {
    width: 500px;
    height: 500px;
    bottom: -100px;
    left: -120px;
    animation-duration: 90s;
    animation-direction: reverse;
}

.orbit-3 {
    width: 180px;
    height: 180px;
    top: 40%;
    left: 15%;
    animation-duration: 45s;
}

@keyframes orbit-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 16px;
}

.hero-title {
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero-lead {
    font-size: clamp(1.1rem, 2.2vw, 1.35rem);
    color: var(--text-muted);
    max-width: 560px;
    margin-bottom: 36px;
    line-height: 1.55;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    cursor: pointer;
    border: none;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 16px rgba(222, 115, 86, 0.35);
}

.btn-primary:hover {
    background: var(--accent-dark);
    box-shadow: 0 6px 20px rgba(222, 115, 86, 0.45);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-alt);
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.05rem;
}

/* ========================================
   Sections
   ======================================== */

.section {
    padding: 100px 0;
}

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

.section-header {
    max-width: 640px;
    margin-bottom: 60px;
}

.section-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

/* ========================================
   Grid & Cards
   ======================================== */

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 36px 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    color: var(--accent);
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.card-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========================================
   Split Layout
   ======================================== */

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.split-content p {
    color: var(--text-muted);
    margin-bottom: 18px;
    font-size: 1.05rem;
}

.feature-list {
    margin: 24px 0 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list li {
    position: relative;
    padding-left: 28px;
    color: var(--text-muted);
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.8;
}

/* Rocket Schematic */
.rocket-schematic {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 40px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

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

.stage-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
}

.stage-cells {
    display: grid;
    gap: 6px;
}

.stage-1 .stage-cells {
    grid-template-columns: repeat(4, 1fr);
}

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

.stage-3 .stage-cells {
    grid-template-columns: 1fr;
}

.cell {
    width: 32px;
    height: 32px;
    background: var(--bg-alt);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.cell:hover {
    background: var(--accent-light);
    border-color: var(--accent);
    transform: scale(1.1);
}

/* ========================================
   Timeline
   ======================================== */

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 24px;
    border-left: 3px solid var(--border);
}

.timeline-item {
    position: relative;
    padding-bottom: 48px;
    padding-left: 36px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 4px;
    width: 24px;
    height: 24px;
    background: var(--bg);
    border: 4px solid var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 0 6px var(--bg-alt);
}

.timeline-year {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 6px;
    letter-spacing: 0.05em;
}

.timeline-body h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.timeline-body p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
    text-align: center;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}

.cta-content {
    max-width: 640px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.cta-text {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.contact-details {
    margin-top: 48px;
    font-style: normal;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
    background: var(--text);
    color: rgba(244, 231, 223, 0.6);
    padding: 32px 0;
    font-size: 0.85rem;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-tag {
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 900px) {
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .split {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .split-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .main-nav {
        position: fixed;
        inset: 72px 0 0 0;
        background: rgba(244, 231, 223, 0.97);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 40px 24px;
        transform: translateX(100%);
        transition: transform var(--transition);
        overflow-y: auto;
    }

    .main-nav.open {
        transform: translateX(0);
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }

    .nav-link {
        font-size: 1.25rem;
        font-weight: 600;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .section {
        padding: 72px 0;
    }

    .timeline {
        padding-left: 16px;
    }

    .timeline-item {
        padding-left: 24px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}