/* ──────────────────────────────────────────────────────────────
   Card Vault — Design System
   Premium hotel-grade dark theme. Trust-first aesthetics.
   ────────────────────────────────────────────────────────────── */

/* No external font imports — all fonts served from local system stack
   to avoid third-party dependencies on PAN-handling pages */

:root {
    /* Palette */
    --bg-primary:    #0a0e1a;
    --bg-secondary:  #0f1629;
    --bg-card:       rgba(15, 23, 42, 0.85);
    --bg-input:      rgba(30, 41, 59, 0.7);
    --bg-hover:      rgba(59, 130, 246, 0.08);

    --border:        rgba(148, 163, 184, 0.12);
    --border-focus:  rgba(59, 130, 246, 0.5);
    --border-success:rgba(34, 197, 94, 0.5);
    --border-error:  rgba(239, 68, 68, 0.5);

    --text-primary:  #f1f5f9;
    --text-secondary:#94a3b8;
    --text-muted:    #64748b;

    --accent:        #3b82f6;
    --accent-hover:  #2563eb;
    --accent-glow:   rgba(59, 130, 246, 0.25);
    --success:       #22c55e;
    --error:         #ef4444;
    --warning:       #f59e0b;

    /* Spacing */
    --radius:        12px;
    --radius-lg:     20px;
    --shadow:        0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg:     0 8px 40px rgba(0, 0, 0, 0.4);
}

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

html { font-size: 16px; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ── Background pattern ───────────────────────────────────── */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(16, 185, 129, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ── Container ────────────────────────────────────────────── */
.container {
    position: relative;
    z-index: 1;
    max-width: 620px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.container--wide { max-width: 680px; }

/* ── Header ───────────────────────────────────────────────── */
.header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.header__logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.header__logo svg { width: 20px; height: 20px; }

.header__title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.header__subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ── Card (glass container) ───────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    animation: fadeInUp 0.5s ease-out;
}

/* ── Security Badge ───────────────────────────────────────── */
.security-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--success);
    background: rgba(34, 197, 94, 0.08);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: 100px;
    padding: 0.35rem 0.85rem;
    margin-bottom: 1.5rem;
}

.security-badge svg { width: 14px; height: 14px; }

/* ── Form Elements ────────────────────────────────────────── */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.4rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.8rem 1rem;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input.valid   { border-color: var(--border-success); }
.form-group input.invalid { border-color: var(--border-error); }

.form-group input::placeholder { color: var(--text-muted); }

.form-group .hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* PAN field with brand icon */
.pan-wrapper {
    position: relative;
}

.pan-wrapper input {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 1.1rem;
    letter-spacing: 0.05em;
    padding-right: 3rem;
}

.pan-brand {
    position: absolute;
    right: 0.8rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    opacity: 0;
    transition: opacity 0.3s;
}

.pan-brand.visible { opacity: 1; }

.pan-check {
    position: absolute;
    right: 3.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--success);
    opacity: 0;
    transition: opacity 0.3s;
}

.pan-check.visible { opacity: 1; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.85rem 1.5rem;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
}

.btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn--success { background: var(--success); }
.btn--outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.btn--outline:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: none;
}

/* ── Loading state ────────────────────────────────────────── */
.btn .spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: none;
}

.btn.loading .spinner { display: block; }
.btn.loading .btn-text { display: none; }

/* ── Alert / Toast ────────────────────────────────────────── */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
    display: none;
    animation: fadeInUp 0.3s ease-out;
}

.alert--success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.25);
    color: var(--success);
}

.alert--error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: var(--error);
}

/* ── Result Card ──────────────────────────────────────────── */
.result-card {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-top: 1rem;
    display: none;
}

.result-card dt {
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.15rem;
}

.result-card dd {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

/* ── PAN Reveal Display ───────────────────────────────────── */
.reveal-display {
    text-align: center;
    padding: 2rem 1.5rem;
}

.reveal-pan {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 1.8rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    margin: 1rem 0;
    transition: filter 0.5s;
}

.reveal-pan.blurred {
    filter: blur(10px);
    user-select: none;
}

.countdown {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 1.5rem auto;
}

.countdown svg {
    width: 80px;
    height: 80px;
    transform: rotate(-90deg);
}

.countdown circle {
    fill: none;
    stroke-width: 4;
}

.countdown .track {
    stroke: var(--border);
}

.countdown .progress {
    stroke: var(--accent);
    stroke-linecap: round;
    transition: stroke-dashoffset 1s linear;
}

.countdown .time {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.countdown.warning .progress { stroke: var(--warning); }
.countdown.danger  .progress { stroke: var(--error); }

/* ── Navigation ───────────────────────────────────────────── */
.nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-secondary);
    transition: border-color 0.2s, color 0.2s, transform 0.2s;
}

.nav-link:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.nav-link svg {
    width: 32px;
    height: 32px;
    color: var(--accent);
}

.nav-link span {
    font-size: 0.85rem;
    font-weight: 600;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}


/* ── Animations ───────────────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.5; }
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 480px) {
    .container { padding: 1rem; }
    .card { padding: 1.5rem; }
    .header__title { font-size: 1.4rem; }
    .reveal-pan { font-size: 1.3rem; }
    .form-row { grid-template-columns: 1fr; }
}