/* CSS Reset & Variables (SF Pro System) */
:root {
    --bg-color: #ffffff;
    --text-main: #1d1d1f;
    --text-secondary: #86868b;
    --accent-blue: #0071e3;
    --nav-height: 52px;
    --max-width: 1024px;
    /* Apple style constraint */
    --radius-lg: 20px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    /* SF Pro / Apple System Font Stack */
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.47059;
    letter-spacing: -0.022em;
    font-size: 17px;
    overflow-x: hidden;
}

/* Global Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-main);
    font-weight: 600;
    letter-spacing: -0.005em;
}

h1 {
    letter-spacing: -0.015em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-blue);
}

/* Navigation */
.glass-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-content {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 22px;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 600;
    font-size: 19px;
    letter-spacing: -0.01em;
    color: var(--text-main);
}

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

.nav-item {
    font-size: 12px;
    color: #333;
    font-weight: 400;
    opacity: 0.8;
}

.nav-item:hover {
    opacity: 1;
    color: var(--text-main);
}

.cta-button {
    background: #000;
    color: #fff;
    padding: 6px 14px;
    border-radius: 980px;
    font-size: 12px;
    font-weight: 400;
    transition: opacity 0.2s;
}

.cta-button:hover {
    opacity: 0.8;
    color: #fff;
}

/* Hero Section */
.hero-container {
    padding: 12px;
    margin-top: var(--nav-height);
    height: 90vh;
    box-sizing: border-box;
}

.hero-full {
    width: 100%;
    height: 100%;
    background-image: url('hero-wide.png');
    background-size: cover;
    background-position: center;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 700px;
    color: #1d1d1f;
}

.hero-content h1 {
    font-size: 64px;
    line-height: 1.08;
    margin-bottom: 16px;
    font-weight: 600;
}

.hero-content .subtitle {
    font-size: 24px;
    line-height: 1.2;
    font-weight: 400;
    margin-bottom: 30px;
    color: #1d1d1f;
}

/* Launch Teaser Section */
.launch-section {
    padding: 180px 0;
    text-align: center;
    background: #fff;
}

.launch-title {
    font-size: 80px;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(180deg, #000 0%, #666 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
}

.launch-date {
    font-size: 32px;
    color: var(--accent-blue);
    font-weight: 600;
}

/* Content Pages (Generic) */
.page-header {
    padding: 120px 0 80px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.page-header h1 {
    font-size: 56px;
    margin-bottom: 24px;
}

.page-header p {
    font-size: 24px;
    line-height: 1.4;
    color: var(--text-secondary);
}

.content-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 22px 120px;
}

.text-block p {
    font-size: 19px;
    line-height: 1.6;
    margin-bottom: 24px;
    color: #333;
}

.text-block h2 {
    font-size: 32px;
    margin-top: 60px;
    margin-bottom: 20px;
}

/* Careers List */
.jobs-list {
    margin-top: 60px;
}

.job-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    border-bottom: 1px solid #e5e5e5;
    transition: opacity 0.2s;
}

.job-item:hover {
    opacity: 0.6;
}

.job-title {
    font-size: 21px;
    font-weight: 600;
}

.job-dept {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 60px;
}

.team-card {
    background: #fbfbfd;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: left;
    border: 1px solid rgba(0, 0, 0, 0.03);
    transition: background 0.2s ease;
}

.team-card:hover {
    background: #f5f5f7;
}

.team-card h3 {
    font-size: 24px;
    margin-bottom: 4px;
    color: #1d1d1f;
}

.team-card p {
    font-size: 15px;
    color: #86868b;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Footer (Columns) */
footer {
    background: #f5f5f7;
    padding: 60px 22px 40px;
    font-size: 12px;
    color: var(--text-secondary);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 14px;
    color: #1d1d1f;
    margin-bottom: 10px;
}

.footer-col h4 {
    color: #1d1d1f;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 8px;
}

.footer-col a:hover {
    text-decoration: underline;
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    border-top: 1px solid #d2d2d7;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.partnership-badge {
    font-size: 11px;
    color: #86868b;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 40px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .nav-links {
        display: none;
    }
}