/* Core Variables & Reset */
:root {
    --bg-main: #0B0F19;
    --bg-card: #121826;
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --accent: #00E5FF;
    --border: #1E293B;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-stack);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 16px;
}

p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

/* Header & Navigation */
.site-header {
    border-bottom: 1px solid var(--border);
    padding: 24px 0;
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

/* Image Placeholders */
.image-placeholder {
    background: #1E293B;
    border: 2px dashed #334155;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 4px;
}

.logo-placeholder {
    width: 120px;
    height: 40px;
}

.pillar-placeholder {
    width: 100%;
    height: 160px;
    margin-bottom: 24px;
}

.nav-cta {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.2s ease;
}

.nav-cta:hover {
    background: var(--accent);
    color: var(--bg-main);
}

/* Hero Section */
.hero {
    padding: 140px 0 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 56px;
    max-width: 900px;
    margin: 0 auto 24px auto;
}

.hero p {
    font-size: 20px;
    max-width: 750px;
    margin: 0 auto 40px auto;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-main);
    padding: 16px 32px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    transition: transform 0.2s ease;
}

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

/* Grid Layouts */
.grid-three {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

@media (max-width: 968px) {
    .grid-three {
        grid-template-columns: 1fr;
    }
    .hero h1 { font-size: 40px; }
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 40px;
    border-radius: 8px;
}

.card h3 {
    font-size: 22px;
}

.card ul {
    margin-top: 24px;
    list-style: none;
}

.card li {
    color: var(--text-secondary);
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
    font-size: 14px;
}

.card li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* Timeline Frame */
.timeline-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 48px;
    margin-top: 40px;
}

/* Security Notice */
.notice-banner {
    background: #1E1B1B;
    border: 1px solid #7F1D1D;
    padding: 32px;
    border-radius: 8px;
    margin-top: 80px;
}

.notice-banner h3 {
    color: #EF4444;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
    font-size: 14px;
}