/* ============================================================
   DBN SYSTEM — Global Design System
   Drive By Numbers Trading Operating System
   Version 2.0.0 — "Trading Environment" Visual Identity
   ============================================================ */

/* ==================== DESIGN TOKENS ==================== */
:root {
    /* ── Base — Deep Graphite (warm charcoal, NOT cold blue-black) ── */
    --sys-bg:          #0c0e13;
    --sys-bg-elevated: #111318;
    --sys-bg-surface:  #16181f;
    --sys-bg-panel:    rgba(18, 21, 28, 0.75);
    --sys-bg-glass:    rgba(18, 21, 28, 0.5);
    --sys-bg-hover:    rgba(45, 212, 168, 0.04);

    /* ── Borders ── */
    --sys-border:       rgba(255, 255, 255, 0.06);
    --sys-border-subtle:rgba(255, 255, 255, 0.03);
    --sys-border-active:rgba(45, 212, 168, 0.2);
    --sys-border-glow:  rgba(45, 212, 168, 0.3);

    /* ── Primary — Electric Teal (DBN signature colour) ── */
    --sys-green:       #14b8a6;
    --sys-green-light: #2dd4bf;
    --sys-green-dim:   #0f766e;
    --sys-green-glow:  rgba(45, 212, 168, 0.35);
    --sys-green-bg:    rgba(45, 212, 168, 0.06);

    /* ── Secondary — Deep Indigo (intelligence, depth) ── */
    --sys-blue:        #6366f1;
    --sys-blue-light:  #818cf8;
    --sys-blue-glow:   rgba(99, 102, 241, 0.25);
    --sys-blue-bg:     rgba(99, 102, 241, 0.06);

    /* ── Semantic — Trading states ── */
    --sys-red:         #ef4444;
    --sys-red-bg:      rgba(239, 68, 68, 0.06);
    --sys-amber:       #d4a853;
    --sys-amber-bg:    rgba(212, 168, 83, 0.06);
    --sys-purple:      #8b5cf6;
    --sys-purple-bg:   rgba(139, 92, 246, 0.06);
    --sys-cyan:        #22d3ee;
    --sys-cyan-bg:     rgba(34, 211, 238, 0.06);

    /* ── Gold — Premium / Value accent ── */
    --sys-gold:        #c9a84c;
    --sys-gold-light:  #dbbf6a;
    --sys-gold-bg:     rgba(201, 168, 76, 0.06);

    /* ── Text — Warmer neutrals ── */
    --sys-text:        #d1d5db;
    --sys-text-muted:  #9ca3af;
    --sys-text-dim:    #6b7280;
    --sys-text-bright: #f3f4f6;

    /* ── Typography ── */
    --sys-font:       'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --sys-font-mono:  'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

    /* ── Spacing scale (4px base) ── */
    --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
    --sp-5: 20px; --sp-6: 24px; --sp-8: 32px; --sp-10: 40px;
    --sp-12: 48px; --sp-16: 64px; --sp-20: 80px; --sp-24: 96px;

    /* ── Radius ── */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* ── Shadows (deeper, more material) ── */
    --shadow-sm:  0 1px 3px rgba(0,0,0,0.35), 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md:  0 4px 14px rgba(0,0,0,0.35), 0 2px 6px rgba(0,0,0,0.2);
    --shadow-lg:  0 10px 40px rgba(0,0,0,0.45), 0 4px 12px rgba(0,0,0,0.25);
    --shadow-glow:0 0 24px rgba(45,212,168,0.12);

    /* ── Transitions ── */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --t-fast: 150ms;
    --t-normal: 250ms;
    --t-slow: 400ms;

    /* ── Z-index scale ── */
    --z-base: 1;
    --z-panel: 10;
    --z-sticky: 100;
    --z-nav: 1000;
    --z-modal: 2000;
    --z-overlay: 3000;
}


/* ==================== RESET & BASE ==================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
    font-family: var(--sys-font);
    background: var(--sys-bg);
    color: var(--sys-text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

::selection {
    background: rgba(45, 212, 168, 0.25);
    color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }


/* ==================== LAYOUT ==================== */
.sys-container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

.sys-container--wide  { max-width: 1440px; }
.sys-container--narrow { max-width: 860px; }

.sys-grid {
    display: grid;
    gap: var(--sp-6);
}

.sys-grid--2 { grid-template-columns: repeat(2, 1fr); }
.sys-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sys-grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
    .sys-grid--3, .sys-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .sys-grid--2, .sys-grid--3, .sys-grid--4 { grid-template-columns: 1fr; }
    .sys-container { padding: 0 var(--sp-4); }
}


/* ==================== TYPOGRAPHY ==================== */
.sys-h1 {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--sys-text-bright);
}

.sys-h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.8px;
    color: var(--sys-text-bright);
}

.sys-h3 {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--sys-text-bright);
}

.sys-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--sys-green);
    font-family: var(--sys-font-mono);
}

.sys-body { font-size: 0.95rem; color: var(--sys-text-muted); line-height: 1.65; }
.sys-small { font-size: 0.82rem; color: var(--sys-text-dim); }
.sys-mono { font-family: var(--sys-font-mono); }
.sys-data { font-family: var(--sys-font-mono); font-weight: 600; font-variant-numeric: tabular-nums; }

.sys-gradient-text {
    background: linear-gradient(135deg, var(--sys-green) 0%, var(--sys-green-light) 50%, var(--sys-blue-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


/* ==================== NAVIGATION — SYSTEM BAR ==================== */
#dbn-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: var(--z-nav);
    height: 52px;
    background: rgba(12, 14, 19, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--sys-border);
    transition: background var(--t-normal) var(--ease-out),
                border-color var(--t-normal) var(--ease-out),
                box-shadow var(--t-normal) var(--ease-out);
}

#dbn-nav.scrolled {
    background: rgba(12, 14, 19, 0.94);
    border-bottom-color: var(--sys-border-active);
    box-shadow: 0 1px 20px rgba(0,0,0,0.5);
}

.dbn-nav-inner {
    max-width: 1440px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 var(--sp-6);
    gap: var(--sp-6);
}

.dbn-logo {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    text-decoration: none;
    flex-shrink: 0;
}

.dbn-logo span {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--sys-text-bright);
    letter-spacing: -0.3px;
}

.dbn-nav-links {
    display: flex;
    list-style: none;
    gap: var(--sp-1);
    margin-left: auto;
}

.dbn-nav-links a {
    display: block;
    padding: 6px 10px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--sys-text-muted);
    border-radius: var(--radius-sm);
    transition: color var(--t-fast), background var(--t-fast);
    white-space: nowrap;
}

.dbn-nav-links a:hover {
    color: var(--sys-text);
    background: rgba(255,255,255,0.04);
}

.dbn-nav-links a.active {
    color: var(--sys-green-light);
    background: var(--sys-green-bg);
}

.dbn-nav-auth {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    margin-left: var(--sp-4);
    flex-shrink: 0;
}

.dbn-login, .dbn-nav-login {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--sys-text-muted);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: color var(--t-fast);
}
.dbn-login:hover, .dbn-nav-login:hover { color: var(--sys-text); }

.dbn-signup, .dbn-nav-signup {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--sys-bg);
    background: var(--sys-green);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    transition: background var(--t-fast), transform var(--t-fast);
}
.dbn-signup:hover, .dbn-nav-signup:hover {
    background: var(--sys-green-light);
    transform: translateY(-1px);
}

/* Mobile nav */
.dbn-mob-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
}
.dbn-mob-btn span {
    width: 18px;
    height: 1.5px;
    background: var(--sys-text-muted);
    border-radius: 1px;
    transition: all var(--t-fast);
}

.dbn-mob-menu {
    display: none;
    position: fixed;
    top: 52px; left: 0; right: 0; bottom: 0;
    background: rgba(12, 14, 19, 0.97);
    backdrop-filter: blur(20px);
    z-index: calc(var(--z-nav) - 1);
    padding: var(--sp-8) var(--sp-6);
    flex-direction: column;
    gap: var(--sp-2);
    overflow-y: auto;
}
.dbn-mob-menu.open { display: flex; }

.dbn-mob-menu a {
    display: block;
    padding: var(--sp-3) var(--sp-4);
    font-size: 1rem;
    font-weight: 500;
    color: var(--sys-text-muted);
    border-radius: var(--radius-md);
    transition: all var(--t-fast);
}
.dbn-mob-menu a:hover,
.dbn-mob-menu a.active {
    color: var(--sys-green-light);
    background: var(--sys-green-bg);
}

.dbn-mob-auth {
    margin-top: auto;
    padding-top: var(--sp-6);
    border-top: 1px solid var(--sys-border);
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
}

.dbn-mob-auth .dbn-signup {
    text-align: center;
    padding: var(--sp-3);
    font-size: 0.95rem;
}

@media (max-width: 900px) {
    .dbn-nav-links, .dbn-nav-auth { display: none; }
    .dbn-mob-btn { display: flex; margin-left: auto; }
}


/* ==================== PANELS & SURFACES ==================== */
.sys-panel {
    background: var(--sys-bg-panel);
    border: 1px solid var(--sys-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    overflow: hidden;
}

.sys-panel--glass {
    background: var(--sys-bg-glass);
    border-color: var(--sys-border-subtle);
}

.sys-panel--interactive {
    transition: border-color var(--t-normal) var(--ease-out),
                box-shadow var(--t-normal) var(--ease-out),
                transform var(--t-normal) var(--ease-out);
}

.sys-panel--interactive:hover {
    border-color: var(--sys-border-active);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.sys-panel__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--sp-3) var(--sp-4);
    border-bottom: 1px solid var(--sys-border);
}

.sys-panel__head-title {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--sys-text-dim);
    font-family: var(--sys-font-mono);
}

.sys-panel__body {
    padding: var(--sp-4);
}

/* Status indicator dot */
.sys-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--sys-green);
    animation: sys-pulse 2.5s ease-in-out infinite;
}

.sys-dot--amber { background: var(--sys-amber); }
.sys-dot--red   { background: var(--sys-red);   }

@keyframes sys-pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(45,212,168,0.4); }
    50% { opacity: 0.7; box-shadow: 0 0 0 4px rgba(45,212,168,0); }
}


/* ==================== BUTTONS ==================== */
.sys-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: 10px 20px;
    font-size: 0.88rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--t-fast) var(--ease-out);
    white-space: nowrap;
    text-decoration: none;
}

.sys-btn--primary {
    background: var(--sys-green);
    color: var(--sys-bg);
    box-shadow: 0 0 20px rgba(45,212,168,0.15);
}
.sys-btn--primary:hover {
    background: var(--sys-green-light);
    box-shadow: 0 0 28px rgba(45,212,168,0.25);
    transform: translateY(-1px);
}

.sys-btn--ghost {
    background: rgba(255,255,255,0.03);
    color: var(--sys-text);
    border: 1px solid var(--sys-border);
}
.sys-btn--ghost:hover {
    background: rgba(255,255,255,0.06);
    border-color: rgba(255,255,255,0.12);
    transform: translateY(-1px);
}

.sys-btn--sm { padding: 6px 14px; font-size: 0.8rem; }
.sys-btn--lg { padding: 14px 28px; font-size: 0.95rem; }


/* ==================== DATA METRICS ==================== */
.sys-metric {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sys-metric__value {
    font-family: var(--sys-font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--sys-text-bright);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}

.sys-metric__value--green { color: var(--sys-green-light); }
.sys-metric__value--red   { color: var(--sys-red); }

.sys-metric__label {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--sys-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}


/* ==================== TAGS & BADGES ==================== */
.sys-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    border-radius: var(--radius-full);
    font-family: var(--sys-font-mono);
}

.sys-tag--green {
    background: var(--sys-green-bg);
    color: var(--sys-green-light);
    border: 1px solid rgba(45,212,168,0.2);
}

.sys-tag--blue {
    background: var(--sys-blue-bg);
    color: var(--sys-blue-light);
    border: 1px solid rgba(99,102,241,0.2);
}

.sys-tag--amber {
    background: var(--sys-amber-bg);
    color: var(--sys-amber);
    border: 1px solid rgba(212,168,83,0.2);
}

.sys-tag--purple {
    background: var(--sys-purple-bg);
    color: var(--sys-purple);
    border: 1px solid rgba(139,92,246,0.2);
}


/* ==================== DIVIDERS ==================== */
.sys-divider {
    height: 1px;
    background: var(--sys-border);
    border: none;
    margin: var(--sp-8) 0;
}

.sys-divider--subtle {
    background: var(--sys-border-subtle);
}


/* ==================== ENVIRONMENT — GRAIN TEXTURE ==================== */
.sys-grain {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.018;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 256px 256px;
}

/* Vignette overlay */
.sys-vignette {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: radial-gradient(ellipse 70% 60% at 50% 50%, transparent 50%, rgba(0,0,0,0.4) 100%);
}


/* ==================== SYSTEM GRID BACKGROUND ==================== */
.sys-grid-bg {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -2;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,0.012) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.012) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 70%);
}


/* ==================== REVEAL ANIMATIONS ==================== */
.sys-reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.sys-reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

.sys-reveal--delay-1 { transition-delay: 0.08s; }
.sys-reveal--delay-2 { transition-delay: 0.16s; }
.sys-reveal--delay-3 { transition-delay: 0.24s; }
.sys-reveal--delay-4 { transition-delay: 0.32s; }


/* ==================== SYSTEM ENTRY ANIMATIONS ==================== */
@keyframes sys-fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes sys-slide-up {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes sys-scale-in {
    from { opacity: 0; transform: scale(0.95); }
    to   { opacity: 1; transform: scale(1); }
}

@keyframes sys-glow-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(45,212,168,0); }
    50%      { box-shadow: 0 0 20px 0 rgba(45,212,168,0.12); }
}

.sys-init-1 { opacity: 0; animation: sys-slide-up 0.7s var(--ease-out) 0.2s forwards; }
.sys-init-2 { opacity: 0; animation: sys-slide-up 0.7s var(--ease-out) 0.35s forwards; }
.sys-init-3 { opacity: 0; animation: sys-slide-up 0.7s var(--ease-out) 0.5s forwards; }
.sys-init-4 { opacity: 0; animation: sys-slide-up 0.7s var(--ease-out) 0.65s forwards; }
.sys-init-5 { opacity: 0; animation: sys-slide-up 0.7s var(--ease-out) 0.8s forwards; }


/* ==================== FOOTER ==================== */
.sys-footer {
    border-top: 1px solid var(--sys-border);
    padding: var(--sp-12) 0 var(--sp-8);
    margin-top: var(--sp-20);
}

.sys-footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--sp-8);
}

.sys-footer__brand p {
    font-size: 0.85rem;
    color: var(--sys-text-dim);
    line-height: 1.6;
    margin-top: var(--sp-3);
    max-width: 280px;
}

.sys-footer__col h4 {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--sys-text-dim);
    margin-bottom: var(--sp-4);
    font-family: var(--sys-font-mono);
}

.sys-footer__col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
}

.sys-footer__col a {
    font-size: 0.85rem;
    color: var(--sys-text-muted);
    transition: color var(--t-fast);
}
.sys-footer__col a:hover { color: var(--sys-green-light); }

.sys-footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--sp-8);
    margin-top: var(--sp-8);
    border-top: 1px solid var(--sys-border-subtle);
    font-size: 0.78rem;
    color: var(--sys-text-dim);
}

@media (max-width: 900px) {
    .sys-footer__grid { grid-template-columns: 1fr 1fr; gap: var(--sp-6); }
    .sys-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
    .sys-footer__grid { grid-template-columns: 1fr; }
    .sys-footer__bottom { flex-direction: column; gap: var(--sp-3); text-align: center; }
}


/* ==================== UTILITY CLASSES ==================== */
.sys-text-center { text-align: center; }
.sys-text-left   { text-align: left;   }
.sys-flex        { display: flex; }
.sys-flex-col    { display: flex; flex-direction: column; }
.sys-items-center { align-items: center; }
.sys-justify-center { justify-content: center; }
.sys-justify-between { justify-content: space-between; }
.sys-gap-2 { gap: var(--sp-2); }
.sys-gap-3 { gap: var(--sp-3); }
.sys-gap-4 { gap: var(--sp-4); }
.sys-gap-6 { gap: var(--sp-6); }
.sys-gap-8 { gap: var(--sp-8); }
.sys-mt-4  { margin-top: var(--sp-4); }
.sys-mt-8  { margin-top: var(--sp-8); }
.sys-mt-12 { margin-top: var(--sp-12); }
.sys-mt-16 { margin-top: var(--sp-16); }
.sys-mb-4  { margin-bottom: var(--sp-4); }
.sys-mb-8  { margin-bottom: var(--sp-8); }
.sys-pt-20 { padding-top: var(--sp-20); }
.sys-pb-20 { padding-bottom: var(--sp-20); }
.sys-section { padding: var(--sp-20) 0; }

/* Nav spacer */
.sys-nav-spacer { height: 52px; }