/* ==========================================================================
   ParticleBank.com - Quantum Particle Currency & Private Reserve Bank
   Design System: Luxury Obsidian Glass & Quantum Particle Luminescence
   ========================================================================== */

/* Fonts are preloaded and loaded asynchronously via HTML link tags in <head> */

:root {
    /* Base Color Tokens */
    --bg-main: #05070e;
    --bg-darker: #020408;
    --bg-surface: rgba(13, 18, 32, 0.72);
    --bg-surface-hover: rgba(22, 30, 52, 0.85);
    --bg-card: rgba(10, 15, 29, 0.75);
    --bg-glass-subtle: rgba(255, 255, 255, 0.03);
    
    /* Particle Luminescence & Accents */
    --color-cyan: #00f0ff;
    --color-cyan-glow: rgba(0, 240, 255, 0.35);
    --color-gold: #f59e0b;
    --color-gold-glow: rgba(245, 158, 11, 0.3);
    --color-purple: #b34bff;
    --color-purple-glow: rgba(179, 75, 255, 0.35);
    --color-blue: #3b82f6;
    --color-emerald: #10b981;
    --color-orange: #ff5500;
    --color-rose: #f43f5e;
    
    /* Typography Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: #38bdf8;
    --text-gold: #fbbf24;
    
    /* Borders & Glass */
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(0, 240, 255, 0.3);
    --border-gold: rgba(245, 158, 11, 0.35);
    --border-glass: rgba(255, 255, 255, 0.12);
    
    /* Box Shadows */
    --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 25px 60px rgba(0, 0, 0, 0.8);
    --shadow-cyan: 0 0 30px rgba(0, 240, 255, 0.22);
    --shadow-gold: 0 0 30px rgba(245, 158, 11, 0.22);
    
    /* Layout */
    --max-width: 1320px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Fonts - Pure Native System Stacks (Instant Zero-Latency Rendering) */
    --font-heading: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-serif: Georgia, 'Times New Roman', serif;
    --font-body: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
    color-scheme: dark;
    background-color: #05070e;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Background Atmosphere */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 25%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.035) 0%, rgba(179, 75, 255, 0.02) 40%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* --- Ticker Bar (Live Particle Currencies) --- */
.ticker-bar {
    background: #020409;
    border-bottom: 1px solid var(--border-subtle);
    padding: 8px 0;
    font-size: 0.82rem;
    font-family: var(--font-mono);
    position: relative;
    z-index: 101;
    overflow: hidden;
}

.ticker-track {
    display: flex;
    align-items: center;
    gap: 32px;
    white-space: nowrap;
    animation: tickerSlide 40s linear infinite;
}

.ticker-track:hover {
    animation-play-state: paused;
}

@keyframes tickerSlide {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.ticker-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.ticker-sym {
    font-weight: 700;
    color: #fff;
}

.ticker-price {
    color: var(--text-secondary);
}

.ticker-change.up {
    color: var(--color-emerald);
}

.ticker-change.down {
    color: var(--color-rose);
}

/* --- Navigation Header --- */
.site-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(5, 7, 14, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    gap: 32px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-size: 1.45rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.03em;
}

.logo-vault-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(245, 158, 11, 0.2));
    border: 1px solid rgba(0, 240, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.25);
}

.logo-vault-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--color-cyan);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-link {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 0;
    transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    color: #fff;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    transition: all var(--transition-smooth);
    white-space: nowrap;
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, #00f0ff 0%, #0088ff 100%);
    color: #020612;
    box-shadow: 0 4px 20px rgba(0, 240, 255, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 240, 255, 0.55);
    background: linear-gradient(135deg, #33f3ff 0%, #00aaff 100%);
}

.btn-gold {
    background: linear-gradient(135deg, #fbbf24 0%, #d97706 100%);
    color: #0b0700;
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35);
}

.btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.55);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(12px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

/* --- Section Title Block --- */
.section-title-wrap {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 56px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.25);
    color: var(--color-cyan);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    margin-bottom: 16px;
}

.section-title span.gradient-text {
    background: linear-gradient(135deg, #ffffff 30%, var(--color-cyan) 90%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title span.gold-text {
    background: linear-gradient(135deg, #fff2cc 20%, var(--color-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
}

/* --- Hero Section & Live Banking Terminal --- */
.hero-section {
    position: relative;
    padding: 80px 0 100px;
    overflow: hidden;
    min-height: 85vh;
}

#hero-particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: auto;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 60% 40%, rgba(5, 7, 14, 0.4) 0%, rgba(5, 7, 14, 0.96) 80%);
    z-index: 1;
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 48px;
    align-items: center;
    position: relative;
    z-index: 3;
}

.hero-headline {
    font-size: clamp(2.6rem, 4.5vw, 4rem);
    font-weight: 800;
    line-height: 1.12;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-headline .glow-word {
    color: #fff;
    text-shadow: 0 0 35px rgba(0, 240, 255, 0.4);
    background: linear-gradient(135deg, #ffffff 40%, var(--color-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtext {
    font-size: 1.18rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 36px;
    max-width: 580px;
}

.hero-btn-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

/* Hero Trust Badges */
.trust-badges-row {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.trust-item svg {
    color: var(--color-emerald);
}

/* --- Hero Vault Card & Portfolio Widget --- */
.hero-vault-card {
    background: linear-gradient(145deg, rgba(16, 24, 45, 0.85) 0%, rgba(8, 12, 24, 0.9) 100%);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.75), var(--shadow-cyan);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.hero-vault-card::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.vault-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.vault-tier-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.35);
    color: var(--color-gold);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-weight: 600;
}

.vault-acc-num {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-muted);
}

.vault-balance-block {
    margin-bottom: 28px;
}

.vault-balance-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 6px;
}

.vault-balance-val {
    font-family: var(--font-heading);
    font-size: 2.6rem;
    font-weight: 800;
    color: #fff;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.vault-balance-val span.currency-tag {
    font-size: 1.1rem;
    color: var(--color-cyan);
    font-weight: 600;
}

.vault-yield-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--color-emerald);
    font-weight: 600;
    margin-top: 4px;
}

/* Portfolio Allocation Bars */
.holdings-allocation {
    margin-bottom: 28px;
}

.allocation-bar {
    display: flex;
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
    background: rgba(255, 255, 255, 0.05);
}

.bar-segment {
    height: 100%;
}

.holdings-pills-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.holding-mini-item {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.holding-mini-name {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
}

.dot-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.holding-mini-val {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.vault-quick-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding-top: 18px;
    border-top: 1px solid var(--border-subtle);
}

.vault-act-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.vault-act-btn:hover {
    background: rgba(0, 240, 255, 0.12);
    border-color: rgba(0, 240, 255, 0.4);
    color: #fff;
    transform: translateY(-2px);
}

.vault-act-btn svg {
    color: var(--color-cyan);
}

/* --- Section: Particle Currencies (Holding & Market Grid) --- */
.currencies-section {
    padding: 100px 0;
    position: relative;
}

.currency-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 28px;
}

.particle-currency-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 30px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.particle-currency-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--part-color, var(--color-cyan));
    opacity: 0.4;
    transition: opacity var(--transition-fast);
}

.particle-currency-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.6), 0 0 30px rgba(var(--part-glow, 0, 240, 255), 0.18);
}

.particle-currency-card:hover::before {
    opacity: 1;
}

.card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.symbol-badge {
    display: flex;
    align-items: center;
    gap: 12px;
}

.symbol-avatar {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--part-color, #fff);
    box-shadow: 0 0 15px rgba(var(--part-glow, 0, 240, 255), 0.25);
}

.currency-name-wrap h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
}

.currency-type-tag {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.card-price-block {
    text-align: right;
}

.card-price {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
}

.card-change {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 600;
}

.card-change.up { color: var(--color-emerald); }
.card-change.down { color: var(--color-rose); }

.card-desc {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
    margin: 16px 0 24px;
    flex-grow: 1;
}

.card-metrics-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    margin-bottom: 24px;
}

.metric-col span.lbl {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.metric-col span.val {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
}

.card-btn-actions {
    display: flex;
    gap: 10px;
}

/* --- Section: Live Particle Swap & Conversion Terminal --- */
.swap-section {
    padding: 90px 0;
    background: radial-gradient(circle at 50% 50%, rgba(16, 24, 48, 0.5) 0%, rgba(5, 7, 14, 0.9) 100%);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.swap-wrapper {
    max-width: 520px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-xl);
    padding: 36px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), var(--shadow-cyan);
    backdrop-filter: blur(20px);
}

.swap-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.swap-title {
    font-size: 1.3rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.swap-box {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 12px;
    transition: border-color var(--transition-fast);
}

.swap-box:focus-within {
    border-color: rgba(0, 240, 255, 0.5);
}

.swap-box-top {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.swap-input-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.swap-num-input {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    width: 60%;
}

.swap-select {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 8px 14px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
}

.swap-select option {
    background: #0d1326;
    color: #fff;
}

.swap-divider-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -4px auto;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: #151d38;
    border: 1px solid var(--border-highlight);
    color: var(--color-cyan);
    cursor: pointer;
    z-index: 2;
    position: relative;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    transition: transform var(--transition-fast);
}

.swap-divider-btn:hover {
    transform: rotate(180deg) scale(1.1);
}

.swap-rate-info {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    padding: 12px 4px 20px;
}

/* --- Section: Quantum Yield Vaults (Staking & Savings) --- */
.vaults-section {
    padding: 100px 0;
}

.vaults-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.vault-tier-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all var(--transition-smooth);
}

.vault-tier-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.vault-tier-card.featured-vault {
    border-color: rgba(179, 75, 255, 0.4);
    background: linear-gradient(180deg, rgba(20, 24, 48, 0.9) 0%, rgba(10, 14, 28, 0.9) 100%);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), var(--shadow-cyan);
}

.vault-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    margin-bottom: 20px;
    width: fit-content;
}

.vault-apy-display {
    margin-bottom: 24px;
}

.apy-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}

.apy-tag {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.vault-features-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 32px;
    flex-grow: 1;
}

.vault-features-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.vault-features-list li svg {
    color: var(--color-cyan);
    flex-shrink: 0;
}

/* --- Section: ParticleBank Metal Quantum Debit Card --- */
.card-showcase-section {
    padding: 100px 0;
    background: radial-gradient(circle at 20% 50%, rgba(245, 158, 11, 0.05) 0%, transparent 60%);
}

.card-showcase-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

/* The 3D Quantum Metal Card */
.metal-card-wrap {
    perspective: 1000px;
}

.metal-card {
    width: 100%;
    max-width: 460px;
    height: 280px;
    border-radius: 20px;
    background: linear-gradient(135deg, #181f33 0%, #080c16 60%, #152238 100%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 28px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8), 0 0 30px rgba(0, 240, 255, 0.15);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.metal-card:hover {
    transform: rotateY(8deg) rotateX(4deg) translateY(-8px);
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.9), 0 0 40px rgba(0, 240, 255, 0.3);
}

.metal-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 40%, rgba(255, 255, 255, 0.06) 50%, transparent 60%);
    pointer-events: none;
}

.card-chip {
    width: 44px;
    height: 34px;
    border-radius: 6px;
    background: linear-gradient(135deg, #d97706, #fbbf24);
    box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.4);
    position: relative;
}

.card-chip::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    background: rgba(0, 0, 0, 0.3);
}

.card-number-display {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    letter-spacing: 0.18em;
    color: #fff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
}

.card-bottom-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.card-holder-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* --- Section: Security & Cryogenic Containment Telemetry --- */
.security-section {
    padding: 100px 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(2, 4, 8, 0.6);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.sec-card {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    transition: all var(--transition-smooth);
}

.sec-card:hover {
    border-color: rgba(0, 240, 255, 0.3);
    background: rgba(15, 23, 42, 0.7);
    transform: translateY(-4px);
}

.sec-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-cyan);
    margin-bottom: 20px;
}

.sec-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.sec-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Section: Account Opening Call to Action --- */
.cta-banner-section {
    padding: 100px 0;
}

.bank-cta-card {
    background: linear-gradient(135deg, rgba(16, 25, 48, 0.95) 0%, rgba(6, 10, 22, 0.95) 100%);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-xl);
    padding: 64px 48px;
    text-align: center;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8), var(--shadow-cyan);
    position: relative;
    overflow: hidden;
}

.bank-cta-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

/* --- Footer --- */
.site-footer {
    background: #020408;
    border-top: 1px solid var(--border-subtle);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin: 16px 0 24px;
    line-height: 1.6;
    max-width: 320px;
}

.footer-col-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

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

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Responsive Media Queries --- */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }
    .vaults-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    .card-showcase-grid {
        grid-template-columns: 1fr;
    }
    .security-grid {
        grid-template-columns: 1fr 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    .currency-cards-grid {
        grid-template-columns: 1fr;
    }
    .security-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}
