/* ==========================================================================
   Big Quiniela Web · Shared Design System
   Used across all pages of the web app.
   ========================================================================== */

:root {
    /* Colors — matched to bigquiniela.com landing for brand consistency */
    --bg-primary: #0a1628;
    --bg-secondary: #0f1f3a;
    --bg-elevated: #152849;
    --bg-overlay: rgba(10, 22, 40, 0.8);

    --accent-blue: #4a8fef;
    --accent-blue-hover: #5b9bf5;
    --accent-yellow: #f5c518;
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-red: #ef4444;

    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-tertiary: #6b7a90;

    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);

    /* Spacing scale */
    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 24px;
    --sp-6: 32px;
    --sp-7: 48px;
    --sp-8: 64px;
    --sp-9: 80px;

    /* Radii */
    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 18px;
    --r-xl: 24px;
    --r-pill: 980px;

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', system-ui, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, 'Menlo', monospace;

    /* Transitions */
    --t-fast: 0.15s ease;
    --t-normal: 0.2s ease;
    --t-slow: 0.3s ease;

    /* Layout */
    --container-max: 1200px;
    --nav-height: 60px;
}

/* ==========================================================================
   Reset
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-system);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Atmospheric background gradient — same as landing */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(74, 143, 239, 0.08), transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(139, 92, 246, 0.06), transparent 50%);
    pointer-events: none;
    z-index: 0;
}

img, svg {
    max-width: 100%;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: opacity var(--t-fast);
}

a:hover {
    opacity: 0.85;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--sp-5);
    position: relative;
    z-index: 1;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.page-content {
    flex: 1;
    padding: var(--sp-7) 0;
}

.center-screen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--sp-5);
    text-align: center;
    position: relative;
    z-index: 1;
}

/* ==========================================================================
   Typography
   ========================================================================== */

.h1 {
    font-size: clamp(32px, 6vw, 56px);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.05;
}

.h2 {
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.h3 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.title-gradient {
    background: linear-gradient(180deg, #ffffff 0%, var(--accent-yellow) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-mono { font-family: var(--font-mono); }
.text-center { text-align: center; }

.eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--accent-blue);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: 14px 28px;
    border-radius: var(--r-pill);
    font-size: 16px;
    font-weight: 600;
    border: none;
    text-decoration: none;
    transition: transform var(--t-fast), opacity var(--t-normal), background var(--t-normal);
    white-space: nowrap;
    user-select: none;
}

.btn:disabled,
.btn.is-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.btn:not(:disabled):hover {
    transform: translateY(-1px);
}

.btn:not(:disabled):active {
    transform: translateY(0);
}

.btn--primary {
    background: var(--accent-blue);
    color: #ffffff;
}

.btn--primary:not(:disabled):hover {
    background: var(--accent-blue-hover);
}

.btn--secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn--secondary:not(:disabled):hover {
    background: var(--bg-elevated);
    border-color: var(--border-strong);
}

.btn--ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 10px 16px;
    font-size: 14px;
}

.btn--ghost:not(:disabled):hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.btn--small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn--full {
    width: 100%;
}

/* ==========================================================================
   Card
   ========================================================================== */

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: var(--sp-6);
    transition: border-color var(--t-normal), transform var(--t-normal);
}

.card--elevated {
    background: var(--bg-elevated);
}

.card--interactive {
    cursor: pointer;
}

.card--interactive:hover {
    transform: translateY(-2px);
    border-color: rgba(74, 143, 239, 0.3);
}

/* ==========================================================================
   Status pill (used for connection/state indicators)
   ========================================================================== */

.status {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    padding: 14px 22px;
    border-radius: var(--r-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--text-secondary);
}

.status--ok {
    color: var(--accent-green);
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.05);
}

.status--fail {
    color: var(--accent-red);
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.05);
}

.status--loading {
    color: var(--text-secondary);
}

/* ==========================================================================
   Loading spinner
   ========================================================================== */

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-strong);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner--lg {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   Language toggle (used by i18n.js)
   ========================================================================== */

.lang-toggle {
    display: inline-flex;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: var(--r-pill);
    padding: 3px;
    gap: 2px;
}

.lang-toggle button {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    padding: 6px 14px;
    border-radius: var(--r-pill);
    font-size: 13px;
    font-weight: 600;
    transition: all var(--t-fast);
}

.lang-toggle button:hover {
    color: var(--text-secondary);
}

.lang-toggle button.is-active {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

/* ==========================================================================
   Utility helpers
   ========================================================================== */

.hidden { display: none !important; }

.stack-2 > * + * { margin-top: var(--sp-2); }
.stack-3 > * + * { margin-top: var(--sp-3); }
.stack-4 > * + * { margin-top: var(--sp-4); }
.stack-5 > * + * { margin-top: var(--sp-5); }
.stack-6 > * + * { margin-top: var(--sp-6); }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
    .container { padding: 0 var(--sp-4); }
    .card { padding: var(--sp-5); }
}