/* Reset + shared design tokens. All UI uses these — no inline styles anywhere. */

:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-surface-overlay: rgba(255, 255, 255, 0.92);
    --color-border: #e5e7eb;
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-text-inverse: #ffffff;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-danger: #dc2626;
    --color-warning: #d97706;
    --color-success: #059669;
    --color-stripe-bg: rgba(0, 0, 0, 0.55);
    --color-input-bg: #ffffff;
    --color-hover: rgba(0, 0, 0, 0.06);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-8: 48px;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* Dark mode — applied when html[data-theme="dark"] OR (data-theme="auto" + user prefers dark). */
html[data-theme="dark"],
html[data-theme="auto"] {
    color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
    html[data-theme="auto"] {
        --color-bg: #0f172a;
        --color-surface: #1e293b;
        --color-surface-overlay: rgba(30, 41, 59, 0.92);
        --color-border: #334155;
        --color-text: #e2e8f0;
        --color-text-muted: #94a3b8;
        --color-primary: #3b82f6;
        --color-primary-hover: #60a5fa;
        --color-input-bg: #0f172a;
        --color-hover: rgba(255, 255, 255, 0.08);
    }
}

html[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-surface-overlay: rgba(30, 41, 59, 0.92);
    --color-border: #334155;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-primary: #3b82f6;
    --color-primary-hover: #60a5fa;
    --color-input-bg: #0f172a;
    --color-hover: rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    font-size: 14px;
    line-height: 1.5;
}

h1, h2, h3, h4 {
    margin: 0 0 var(--space-3);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 24px; }
h2 { font-size: 20px; }
h3 { font-size: 16px; }

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

code {
    font-family: var(--font-mono);
    font-size: 0.95em;
    background: var(--color-bg);
    padding: 1px 4px;
    border-radius: var(--radius-sm);
}

/* --- Buttons (shared) --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font: inherit;
    font-weight: 500;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    text-align: center;
    user-select: none;
    transition: background-color 0.1s ease;
    text-decoration: none;
}
.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover { background: var(--color-primary-hover); text-decoration: none; }

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-secondary:hover { background: var(--color-bg); text-decoration: none; }

.btn-warning {
    background: var(--color-warning);
    color: #fff;
}
.btn-warning:hover { background: #b45309; text-decoration: none; }

.btn-warning-sm {
    background: transparent;
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
    font-size: 12px;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.btn-link {
    background: transparent;
    color: var(--color-primary);
    border: none;
    padding: 0;
    cursor: pointer;
    font: inherit;
}
.btn-link:hover { text-decoration: underline; }

.btn-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Form primitives (shared across login + admin) --- */

.form-label {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    text-align: left;
    margin: 0;
}

.form-label-text {
    font-weight: 600;
    font-size: 13px;
    color: var(--color-text);
    letter-spacing: 0.01em;
}

.form-input {
    font: inherit;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-input-bg);
    color: var(--color-text);
    transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.form-input:hover {
    border-color: var(--color-text-muted);
}
.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}
.form-input[type="file"] {
    padding: var(--space-2) var(--space-3);
    cursor: pointer;
}

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%236b7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' d='M1 1.5l5 5 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-4) center;
    padding-right: var(--space-8);
}

textarea.form-input {
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.5;
    resize: vertical;
    min-height: 80px;
}

.form-help {
    color: var(--color-text-muted);
    font-size: 12px;
    line-height: 1.5;
}
.form-help code {
    font-size: 11px;
}

/* Theme-aware logo swap. Used by any page that renders both primary and
   dark variants of the site logo (login cards, admin header). When only
   one variant is set, the unclassed <img> shows in both themes. */
html[data-theme="light"] .logo-for-dark { display: none; }
html[data-theme="dark"] .logo-for-light { display: none; }
@media (prefers-color-scheme: dark) {
    html[data-theme="auto"] .logo-for-light { display: none; }
}
@media (prefers-color-scheme: light) {
    html[data-theme="auto"] .logo-for-dark { display: none; }
}