/*
 * Purpose: Single global stylesheet for every RequestPilot page (auth, dashboard, public form, profile).
 *
 * Responsibilities:
 *  - Define design tokens via CSS custom properties (colors, spacing, type, shadows).
 *  - Style shared layout primitives (cards, forms, buttons, alerts, tables, status pills).
 *  - Provide page-specific selectors (request detail, file upload, public form) layered on top of the primitives.
 *
 * Consumers: Every Thymeleaf template; served as a static resource at /css/app.css.
 * Dependencies: None (no preprocessor, no framework).
 * Notes: Single-file by design — milestone scope doesn't justify Tailwind / build pipeline. Token-driven so a redesign
 *        can be done by swapping the :root block.
 */

:root {
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-border: #e5e7eb;
    --color-border-strong: #d1d5db;
    --color-text: #1f2937;
    --color-muted: #6b7280;
    --color-heading: #111827;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-soft: rgba(37, 99, 235, 0.1);
    --color-success-bg: #ecfdf5;
    --color-success-border: #a7f3d0;
    --color-success-text: #065f46;
    --color-error-bg: #fef2f2;
    --color-error-border: #fecaca;
    --color-error-text: #991b1b;
    --radius: 6px;
    --radius-lg: 8px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    text-decoration: underline;
}

h1 {
    font-size: 1.875rem;
    margin: 0 0 0.5rem;
    color: var(--color-heading);
}

h2 {
    font-size: 1.5rem;
    color: var(--color-heading);
}

.muted {
    color: var(--color-muted);
}

.topnav {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topnav .brand {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-heading);
}

.topnav .brand:hover {
    text-decoration: none;
}

.topnav .links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.topnav .links a {
    color: #374151;
}

.topnav .links a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.inline-form {
    display: inline;
    margin: 0;
}

.link-button {
    background: none;
    border: none;
    color: #374151;
    font: inherit;
    cursor: pointer;
    padding: 0;
}

.link-button:hover {
    color: var(--color-accent);
}

.container {
    max-width: 540px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.container-wide {
    max-width: 720px;
}

.container-xl {
    max-width: 960px;
}

.card-flush {
    padding: 0;
    overflow: hidden;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.stats {
    display: flex;
    gap: 0.75rem;
}

.stat {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem 1.25rem;
    min-width: 90px;
    text-align: center;
}

.stat-num {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-heading);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-muted);
    margin-top: 0.25rem;
}

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

.data-table th,
.data-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

.data-table th {
    font-size: 0.875rem;
    color: var(--color-muted);
    font-weight: 500;
    background: #fafbfc;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem 1rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 600px) {
    .detail-grid {
        grid-template-columns: 1fr;
    }
}

.preserve-newlines {
    white-space: pre-wrap;
    word-wrap: break-word;
}

.public-page {
    margin-top: 3rem;
}

.text-center {
    text-align: center;
}

.footer-note {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.875rem;
    color: var(--color-muted);
}

textarea {
    resize: vertical;
}

code {
    background: #f3f4f6;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.9em;
}

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

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

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #374151;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-surface);
    color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.error-message {
    color: var(--color-error-text);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
}

.btn:hover {
    background: var(--color-accent-hover);
    text-decoration: none;
}

.btn-secondary {
    background: var(--color-surface);
    color: #374151;
    border: 1px solid var(--color-border-strong);
}

.btn-secondary:hover {
    background: #f3f4f6;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success-text);
    border: 1px solid var(--color-success-border);
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error-text);
    border: 1px solid var(--color-error-border);
}

.form-footer {
    margin-top: 1.5rem;
    margin-bottom: 0;
}

.hero {
    padding: 4rem 1rem 3rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.125rem;
    color: #4b5563;
    margin-bottom: 2rem;
}

.hero-actions {
    display: inline-flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}