/* ============================================
   Privatiser — Landing Page
   ============================================ */

:root {
    --bg: #fafafa;
    --bg-surface: #ffffff;
    --bg-input: #f4f4f5;
    --bg-input-focus: #ffffff;
    --bg-elevated: #f0f0f2;
    --text: #18181b;
    --text-secondary: #71717a;
    --text-tertiary: #a1a1aa;
    --border: #e4e4e7;
    --border-focus: #3b82f6;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-text: #ffffff;
    --success: #22c55e;
    --error: #ef4444;
    --ring: rgba(59, 130, 246, 0.12);
    --radius: 8px;
    --radius-lg: 12px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    --transition: 120ms ease;
}

[data-theme="dark"] {
    --bg: #09090b;
    --bg-surface: #18181b;
    --bg-input: #27272a;
    --bg-input-focus: #27272a;
    --bg-elevated: #1e1e22;
    --text: #fafafa;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --border: #27272a;
    --border-focus: #3b82f6;
    --ring: rgba(59, 130, 246, 0.2);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    text-align: center;
    margin-bottom: 2rem;
}

/* ============ NAV ============ */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1080px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
}

.logo {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: color var(--transition);
}

.nav-links a:hover { color: var(--text); }

#theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: color var(--transition), border-color var(--transition);
}

#theme-toggle:hover { color: var(--text); border-color: var(--text-secondary); }

/* ============ HERO ============ */
.hero {
    padding-bottom: 4rem;
    border-bottom: 1px solid var(--border);
}

.hero-content {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
    padding: 3rem 1.5rem 0;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.15;
    color: var(--text);
}

.hero-sub {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-top: 1.25rem;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-local {
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 1rem;
}

.hero-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 2rem;
}

.hero-actions .btn-primary,
.hero-actions .btn-secondary {
    padding: 10px 28px;
    font-size: 0.875rem;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition);
}

/* ============ FEATURES ============ */
.features {
    max-width: 1080px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

@media (max-width: 768px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .feature-grid { grid-template-columns: 1fr; } }

.feature-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: border-color var(--transition);
}

.feature-card:hover { border-color: var(--text-tertiary); }

.feature-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.feature-card h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.6;
}

/* ============ TOOL SECTION ============ */
.tool-section {
    max-width: 960px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
    border-top: 1px solid var(--border);
}

/* === Tabs === */
.tabs {
    display: flex;
    justify-content: center;
    gap: 2px;
    margin-bottom: 1.5rem;
    background: var(--bg-input);
    border-radius: var(--radius);
    padding: 3px;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.tab {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.4rem 1.25rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font);
}

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

.tab.active {
    background: var(--bg-surface);
    color: var(--text);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* === Panels === */
.panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

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

.panel { display: flex; flex-direction: column; }

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.panel-header label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.panel-actions {
    display: flex;
    gap: 4px;
}

/* === Inputs === */
textarea {
    width: 100%;
    min-height: 260px;
    padding: 12px 14px;
    font-family: var(--mono);
    font-size: 0.8125rem;
    line-height: 1.6;
    background: var(--bg-input);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    resize: vertical;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

textarea:focus {
    outline: none;
    border-color: var(--border-focus);
    background: var(--bg-input-focus);
    box-shadow: 0 0 0 3px var(--ring);
}

textarea[readonly] { cursor: default; }
textarea::placeholder { color: var(--text-tertiary); }

/* === Buttons === */
.actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 1rem 0;
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-text);
    border: none;
    border-radius: 6px;
    padding: 8px 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform 80ms ease;
    font-family: var(--font);
    display: inline-block;
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary.loading { opacity: 0.6; pointer-events: none; }

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 14px;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font);
    display: inline-block;
}

.btn-secondary:hover { background: var(--bg-input); }

.btn-sm {
    background: none;
    color: var(--text-tertiary);
    border: 1px solid var(--border);
    border-radius: 5px;
    padding: 2px 8px;
    font-size: 0.6875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font);
}

.btn-sm:hover { color: var(--text-secondary); border-color: var(--text-tertiary); }

/* === Status === */
.status {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-left: auto;
}

.status.success { color: var(--success); }
.status.error { color: var(--error); }

/* === Mapping Section === */
.mapping-section {
    margin-top: 1.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.mapping-section summary {
    padding: 12px 16px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.8125rem;
    color: var(--text);
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mapping-section summary::before {
    content: '\25B6';
    font-size: 0.5rem;
    transition: transform var(--transition);
    display: inline-block;
}

.mapping-section[open] summary::before { transform: rotate(90deg); }
.mapping-section summary:hover { color: var(--accent); }

.mapping-actions {
    display: flex;
    gap: 6px;
    padding: 0 16px 10px;
}

.table-wrapper {
    max-height: 260px;
    overflow-y: auto;
    margin: 0 16px;
}

table { width: 100%; border-collapse: collapse; }

th {
    text-align: left;
    padding: 8px 10px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--bg-surface);
}

td {
    padding: 6px 10px;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    word-break: break-all;
}

tr:last-child td { border-bottom: none; }
tr:hover td { color: var(--text); }

.mapping-section > textarea {
    margin: 8px 16px 16px;
    width: calc(100% - 32px);
    min-height: 64px;
    font-size: 0.6875rem;
}

/* ============ HOW IT WORKS ============ */
.how-section {
    max-width: 960px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
    border-top: 1px solid var(--border);
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

@media (max-width: 768px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } }

.step {
    text-align: center;
}

.step-num {
    width: 36px;
    height: 36px;
    line-height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--accent-text);
    font-weight: 700;
    font-size: 0.875rem;
    margin: 0 auto 0.75rem;
}

.step h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 0.375rem;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.6;
}

/* ============ INSTALL ============ */
.install-section {
    max-width: 960px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
    border-top: 1px solid var(--border);
}

.install-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

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

.install-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.install-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.install-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.install-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-install {
    text-decoration: none;
    font-size: 0.8125rem;
    padding: 8px 18px;
}

.code-block {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 14px;
    margin-bottom: 1rem;
}

.code-block code {
    font-family: var(--mono);
    font-size: 0.8125rem;
    color: var(--accent);
}

.install-examples {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.install-examples code {
    font-family: var(--mono);
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    display: block;
}

/* ============ FOOTER ============ */
footer {
    border-top: 1px solid var(--border);
    padding: 2rem 1.5rem;
    text-align: center;
}

.footer-brand {
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

footer p {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 500;
    transition: color var(--transition);
}

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