/* THEMING VARIABLES (DARK DEFAULT) */
:root {
    --bg-navy: #080D1A;
    --bg-card: #111827;
    --bg-card-hover: #1F2937;
    --text-main: #F3F4F6;
    --text-muted: #9CA3AF;
    --text-white: #FFFFFF;
    --accent-gold: #D97706;
    --accent-gold-light: #F59E0B;
    --border-color: rgba(255, 255, 255, 0.08);
    --nav-bg: rgba(8, 13, 26, 0.95);
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --font-code: 'Fira Code', monospace;
}

body.light-mode {
    --bg-navy: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F1F5F9;
    --text-main: #1E293B;
    --text-muted: #64748B;
    --text-white: #0F172A;
    --border-color: #E2E8F0;
    --nav-bg: rgba(255, 255, 255, 0.95);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-navy);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; border-bottom: 1px solid var(--border-color); }
.text-center { text-align: center; }

/* FIXED NAVBAR RESPONSIVE FIX */
.navbar {
    position: fixed; top: 0; left: 0; right: 0;
    background: var(--nav-bg); backdrop-filter: blur(12px);
    z-index: 1000; border-bottom: 1px solid var(--border-color);
}
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 70px; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.logo { color: var(--text-white); font-weight: 700; font-size: 1.1rem; text-decoration: none; display: flex; align-items: center; gap: 8px; }
.logo-accent { width: 8px; height: 8px; background: var(--accent-gold-light); border-radius: 50%; }
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-size: 0.88rem; transition: color 0.3s; }
.nav-links a:hover { color: var(--accent-gold-light); }

.theme-btn {
    background: var(--bg-card); border: 1px solid var(--border-color);
    color: var(--text-white); width: 36px; height: 36px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center; cursor: pointer; flex-shrink: 0;
}
body.light-mode .sun-icon { display: none; }
body:not(.light-mode) .moon-icon { display: none; }

/* BUTTONS */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 10px 20px; border-radius: 6px; font-weight: 600; font-size: 0.88rem;
    text-decoration: none; transition: all 0.3s ease; white-space: nowrap;
}
.btn-gold { background-color: var(--accent-gold); color: #FFF; border: 1px solid var(--accent-gold); }
.btn-gold:hover { background-color: var(--accent-gold-light); transform: translateY(-2px); }
.btn-glow { box-shadow: 0 0 15px rgba(217, 119, 6, 0.3); }
.btn-outline { border: 1px solid var(--border-color); color: var(--text-main); }
.btn-outline:hover { background-color: var(--bg-card-hover); transform: translateY(-2px); }

/* HERO */
.hero { position: relative; min-height: 80vh; display: flex; align-items: center; padding: 120px 0 60px; }
#hero-canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; }
.hero-content { position: relative; z-index: 3; }
.tag { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; background: rgba(217, 119, 6, 0.12); border: 1px solid rgba(217, 119, 6, 0.3); color: var(--accent-gold-light); font-size: 0.75rem; font-weight: 700; border-radius: 30px; margin-bottom: 20px; }
.pulse-dot { width: 6px; height: 6px; background: var(--accent-gold-light); border-radius: 50%; }
.hero-title { font-size: 3rem; font-weight: 800; line-height: 1.15; color: var(--text-white); margin-bottom: 16px; }
.hero-subtitle { font-size: 1.15rem; color: var(--accent-gold-light); margin-bottom: 12px; }
.hero-desc { font-size: 0.98rem; color: var(--text-muted); max-width: 650px; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ABOUT & DECRYPT TEXT */
.about-card { background: var(--bg-card); border: 1px solid var(--border-color); padding: 40px 24px; border-radius: 12px; }
.section-label { font-size: 0.78rem; font-weight: 700; letter-spacing: 2px; color: var(--accent-gold-light); margin-bottom: 12px; }
.decrypt-headline { font-family: var(--font-code); font-size: 1.6rem; font-weight: 700; color: var(--text-white); line-height: 1.35; margin-bottom: 16px; word-break: break-word; }
.about-text { font-size: 1.05rem; color: var(--text-muted); }

/* FLEET DIAGRAM FIX FOR MOBILE */
.diagram-wrapper {
    position: relative; background: var(--bg-card); border: 1px solid var(--border-color);
    padding: 30px 16px; border-radius: 12px; overflow: hidden; margin-top: 20px;
}
#flow-canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; }
.diagram-nodes { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 20px; }

.node-box {
    background: var(--bg-navy); border: 1px solid var(--border-color);
    padding: 14px 20px; border-radius: 8px; text-align: center; width: 100%; max-width: 320px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2); transition: border-color 0.3s;
}
.node-box:hover { border-color: var(--accent-gold-light); }
.node-top { border-color: var(--accent-gold-light); }
.node-title { font-weight: 700; font-size: 0.95rem; color: var(--text-white); }
.node-sub { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }

.node-middle-line { width: 2px; height: 30px; background: var(--border-color); }
.nodes-bottom-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; width: 100%; }
.diagram-footer { font-size: 0.8rem; color: var(--text-muted); margin-top: 24px; line-height: 1.5; }
.status-indicator { color: #10B981; font-weight: 600; }

/* CARDS & GRIDS */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card, .industry-card, .partnership-box, .timeline-step {
    background: var(--bg-card); border: 1px solid var(--border-color);
    padding: 24px; border-radius: 8px; color: var(--text-main); transition: all 0.3s ease;
}
.card h3, .partnership-info h2, .timeline-step h4 { color: var(--text-white); margin-bottom: 8px; font-size: 1.15rem; }
.card p, .timeline-step p { color: var(--text-muted); font-size: 0.9rem; }
.card:hover, .industry-card:hover { transform: translateY(-4px); border-color: var(--accent-gold-light); }

.partnership-box { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; }
.partnership-highlights { display: flex; flex-direction: column; gap: 10px; }
.highlight-item { display: flex; align-items: center; gap: 8px; font-weight: 500; font-size: 0.9rem; }
.highlight-item i { color: var(--accent-gold-light); }

.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.step-num { font-size: 1.1rem; font-weight: 800; color: var(--accent-gold-light); font-family: var(--font-code); margin-bottom: 6px; }

.contact-sub { color: var(--text-muted); margin-bottom: 24px; font-size: 0.95rem; }
.contact-buttons { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* SCROLL REVEAL CLASS */
.scroll-reveal { opacity: 0; transform: translateY(20px); transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1); }
.scroll-reveal.revealed { opacity: 1; transform: translateY(0); }

/* FOOTER */
footer { background: #040711; color: var(--text-muted); padding: 20px 0; font-size: 0.8rem; border-top: 1px solid var(--border-color); }

/* MOBILE RESPONSIVE MEDIA QUERIES (HP & TABLET) */
@media (max-width: 992px) {
    .grid-2, .grid-3, .timeline, .partnership-box, .nodes-bottom-grid { 
        grid-template-columns: 1fr; 
    }
    .nav-links { display: none; }
    .hero-title { font-size: 2.2rem; }
    .decrypt-headline { font-size: 1.35rem; }
    .nav-btn { font-size: 0.78rem; padding: 8px 14px; }
    .section { padding: 60px 0; }
    .diagram-nodes { gap: 12px; }
    .node-middle-line { height: 20px; }
}