/* ==========================================================
   DataPurge — Design System
   Minimal & clean. Stripe/Linear aesthetic.
   ========================================================== */

/* --- Tokens --- */
:root {
    --color-bg: #ffffff;
    --color-surface: #f8fafc;
    --color-surface-hover: #f1f5f9;
    --color-text: #0f172a;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #eff6ff;
    --color-success: #16a34a;
    --color-success-light: #f0fdf4;
    --color-warning: #d97706;
    --color-warning-light: #fffbeb;
    --color-danger: #dc2626;
    --color-danger-light: #fef2f2;
    --color-border: #e2e8f0;
    --color-border-focus: #2563eb;
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
    --max-width: 960px;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'SF Mono', ui-monospace, 'Cascadia Code', monospace;
    --transition: 150ms ease;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0c0f1a;
        --color-surface: #151929;
        --color-surface-hover: #1c2236;
        --color-text: #e2e8f0;
        --color-text-secondary: #94a3b8;
        --color-text-muted: #64748b;
        --color-primary: #3b82f6;
        --color-primary-hover: #60a5fa;
        --color-primary-light: #172554;
        --color-success-light: #052e16;
        --color-warning-light: #451a03;
        --color-danger-light: #450a0a;
        --color-border: #1e293b;
        --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
        --shadow: 0 1px 3px rgba(0,0,0,0.3);
        --shadow-lg: 0 4px 12px rgba(0,0,0,0.3);
    }
}

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

html {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

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

/* --- Layout --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container-narrow {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Typography --- */
h1 { font-size: 2.5rem; font-weight: 700; line-height: 1.2; letter-spacing: -0.025em; }
h2 { font-size: 1.75rem; font-weight: 600; line-height: 1.3; letter-spacing: -0.015em; }
h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.4; }
h4 { font-size: 1rem; font-weight: 600; }

.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-center { text-align: center; }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.9375rem;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: #fff;
}

.btn-success {
    background: var(--color-success);
    color: #fff;
}
.btn-success:hover {
    background: #15803d;
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-outline:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: none;
    padding: 0.5rem 0.75rem;
}
.btn-ghost:hover { color: var(--color-text); background: var(--color-surface); }

.btn-danger {
    background: transparent;
    color: var(--color-danger);
    border-color: var(--color-danger);
}
.btn-danger:hover { background: var(--color-danger); color: #fff; }

.btn-lg { padding: 0.875rem 2rem; font-size: 1.0625rem; border-radius: var(--radius-lg); }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-icon { padding: 0.5rem; }

.btn-group { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* --- Cards --- */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: box-shadow var(--transition);
}

.card-hover:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.card-body { margin-bottom: 1rem; }

.card-footer {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.1875rem 0.625rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.4;
    white-space: nowrap;
}

.badge-category {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-easy {
    background: var(--color-success-light);
    color: var(--color-success);
}

.badge-medium {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.badge-hard, .badge-very_hard {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.badge-sent {
    background: var(--color-success-light);
    color: var(--color-success);
}

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

/* --- Tags (data types) --- */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.tag {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 100px;
    font-size: 0.6875rem;
    background: var(--color-surface-hover);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

/* --- Forms --- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.375rem;
    color: var(--color-text);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

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

@media (max-width: 640px) {
    .form-row { grid-template-columns: 1fr; }
}

/* --- Nav --- */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(8px);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.0625rem;
    color: var(--color-text);
    text-decoration: none;
}

.nav-tabs {
    display: flex;
    gap: 0.25rem;
    list-style: none;
}

.nav-tab {
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition);
}

.nav-tab:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

.nav-tab.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

@media (max-width: 640px) {
    .nav-tab { padding: 0.5rem 0.5rem; font-size: 0.8125rem; }
}

/* --- Hero (landing page) --- */
.hero {
    padding: 5rem 0 4rem;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.25rem;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 580px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

@media (max-width: 640px) {
    .hero { padding: 3rem 0 2.5rem; }
    .hero h1 { font-size: 2rem; }
    .hero .subtitle { font-size: 1.0625rem; }
}

/* --- Steps --- */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 3rem 0;
}

.step {
    text-align: center;
    padding: 1.5rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.step h3 { margin-bottom: 0.5rem; }
.step p { color: var(--color-text-secondary); font-size: 0.9375rem; }

@media (max-width: 640px) {
    .steps { grid-template-columns: 1fr; gap: 1rem; }
}

/* --- Privacy callout --- */
.callout {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    margin: 2rem 0;
}

.callout-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.callout h3 { margin-bottom: 0.5rem; }
.callout p { color: var(--color-text-secondary); max-width: 520px; margin: 0 auto; }

.callout-action {
    border-left: 4px solid var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 5%, var(--color-surface));
}

/* --- Stats bar --- */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: 3rem;
    padding: 2.5rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    margin: 2rem 0;
}

.stat { text-align: center; }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--color-primary); }
.stat-label { font-size: 0.8125rem; color: var(--color-text-secondary); margin-top: 0.25rem; }

@media (max-width: 640px) {
    .stats-bar { gap: 1.5rem; }
    .stat-value { font-size: 1.5rem; }
}

/* --- Queue --- */
.queue-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.queue-summary-stat { text-align: center; }
.queue-summary-stat .value { font-size: 1.5rem; font-weight: 700; }
.queue-summary-stat .label { font-size: 0.75rem; color: var(--color-text-secondary); }

.queue-current {
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
    background: var(--color-bg);
}

.queue-current .broker-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.queue-current .broker-domain {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.queue-current .broker-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.email-preview {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin: 1rem 0;
    overflow: hidden;
}

.email-preview-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    font-family: inherit;
}

.email-preview-toggle:hover { color: var(--color-text); }

.email-preview-content {
    padding: 1rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--color-text-secondary);
    max-height: 400px;
    overflow-y: auto;
    display: none;
}

.email-preview-content.open { display: block; }

.queue-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.queue-actions .btn { flex: 1; }

@media (max-width: 640px) {
    .queue-actions { flex-direction: column; }
}

/* --- Queue list (remaining brokers) --- */
.queue-list-header {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

.queue-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: all var(--transition);
}

.queue-item:hover { background: var(--color-surface); }

.queue-item.sent {
    opacity: 0.5;
}

.queue-item-name { font-weight: 500; font-size: 0.9375rem; }
.queue-item-meta { display: flex; align-items: center; gap: 0.5rem; }

/* --- Brokers directory --- */
.search-bar {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.search-bar .form-input { flex: 1; min-width: 200px; }
.search-bar .form-select { width: auto; min-width: 150px; }

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

.broker-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.broker-card-title { font-weight: 600; }
.broker-card-domain { color: var(--color-text-muted); font-size: 0.8125rem; }

.broker-card-details {
    display: none;
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.broker-card-details.open { display: block; }

.broker-methods {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.method-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* --- Progress --- */
.progress-header {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.progress-stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
}

.progress-stat-card .value {
    font-size: 2rem;
    font-weight: 700;
}

.progress-stat-card .label {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

@media (max-width: 640px) {
    .progress-header { grid-template-columns: 1fr; }
}

.progress-list { margin-top: 1.5rem; }

.progress-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.progress-item-name { font-weight: 500; }
.progress-item-date { font-size: 0.8125rem; color: var(--color-text-muted); }

.overdue-section {
    margin-top: 2rem;
    padding: 1.25rem;
    background: var(--color-danger-light);
    border: 1px solid var(--color-danger);
    border-radius: var(--radius-lg);
}

.overdue-section h3 { color: var(--color-danger); margin-bottom: 0.75rem; }

/* --- Setup form --- */
.setup-page {
    padding: 3rem 0;
}

.setup-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.setup-header h2 { margin-bottom: 0.5rem; }

.privacy-notice {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--color-success-light);
    border: 1px solid var(--color-success);
    border-radius: var(--radius);
    margin-bottom: 2rem;
    font-size: 0.875rem;
    color: var(--color-text);
}

.privacy-notice-icon { font-size: 1.25rem; flex-shrink: 0; line-height: 1.4; }

/* --- Section spacing --- */
.section { padding: 3rem 0; }
.section-header { margin-bottom: 2rem; }

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}

.footer a { color: var(--color-text-secondary); }
.footer-links { display: flex; justify-content: center; gap: 1.5rem; margin-bottom: 0.75rem; }

/* --- Utilities --- */
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.gap-1 { gap: 0.5rem; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* --- View transitions --- */
.view { padding: 2rem 0; }

/* --- Empty state --- */
.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--color-text-secondary);
}
.empty-state h3 { margin-bottom: 0.5rem; color: var(--color-text); }

/* --- Toast/notification --- */
.toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius);
    background: var(--color-text);
    color: var(--color-bg);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    transform: translateY(0.5rem);
    transition: opacity 200ms, transform 200ms;
    pointer-events: none;
}
.toast.show { opacity: 1; transform: translateY(0); pointer-events: auto; }