/*
 * Sprechen Forms shared theme + chrome stylesheet (PLAN 616).
 *
 * Single owner of the Forms app color palette. Every color is a CSS custom
 * property ("token") on :root. The base :root holds the CURRENT (light) values,
 * so light mode is visually unchanged. A `prefers-color-scheme: dark` media
 * block re-points the tokens to a WCAG-AA dark palette so dark mode follows the
 * OS/browser preference by default. The `:root[data-theme="dark"]` /
 * `:root[data-theme="light"]` blocks are the MANUAL override emitted server-side
 * from the Settings preference; their attribute specificity (0,1,1) beats both
 * the base :root and the media block (0,0,1), so an explicit choice wins over the
 * system preference. When the preference is "system" no attribute is rendered and
 * the media query governs.
 *
 * The shared chrome/layout rules that used to be duplicated in the inline
 * <style> blocks of Index.cshtml, Settings.cshtml and the FormNavigation view
 * component live here too (DRY). All COLORS come from the tokens.
 */

:root {
    color-scheme: light dark;

    --forms-bg: #ffffff;
    --forms-text: #000000;
    --forms-muted-text: #444444;
    --forms-progress-text: #555555;
    --forms-border: #767676;
    --forms-divider: #cccccc;
    --forms-focus-ring: #0078d4;
    --forms-skiplink-bg: #111111;
    --forms-skiplink-text: #ffffff;

    --forms-invalid-border: #c42b1c;

    --forms-error-text: #b00020;
    --forms-error-border: #b00020;
    --forms-error-bg: #fff5f6;

    --forms-study-bg: #f0f4f8;

    --forms-success-bg: #dff6dd;
    --forms-success-border: #107c10;
    --forms-cancel-bg: #fff4ce;
    --forms-cancel-border: #c19c00;

    --forms-progress-track: #e0e0e0;
    --forms-progress-value: #0078d4;

    --forms-primary-bg: #0078d4;
    --forms-primary-text: #ffffff;
    --forms-primary-hover-bg: #106ebe;

    --forms-secondary-bg: #f3f3f3;
    --forms-secondary-text: #333333;
    --forms-secondary-border: #cccccc;
    --forms-secondary-hover-bg: #e5e5e5;
    --forms-secondary-hover-border: #999999;

    --forms-success-btn-bg: #107c10;
    --forms-success-btn-text: #ffffff;
    --forms-success-btn-hover-bg: #0b5e0b;

    --forms-danger-bg: #ffffff;
    --forms-danger-text: #c42b1c;
    --forms-danger-border: #c42b1c;
    --forms-danger-hover-bg: #fdf3f2;
}

/*
 * Dark palette (cross-app aligned with PLAN 614's voice-app dark values).
 * Text tokens meet WCAG-AA >=4.5:1 and UI/non-text tokens >=3:1 on the
 * #212529-family dark surface. Only color tokens change; light stays untouched.
 */
@media (prefers-color-scheme: dark) {
    :root {
        --forms-bg: #212529;
        --forms-text: #e6e6e6;
        --forms-muted-text: #ced4da;
        --forms-progress-text: #ced4da;
        --forms-border: #868e96;
        --forms-divider: #495057;
        --forms-focus-ring: #8cc4ff;
        --forms-skiplink-bg: #e9ecef;
        --forms-skiplink-text: #16191c;

        --forms-invalid-border: #ff6b6b;

        --forms-error-text: #ff6b6b;
        --forms-error-border: #ff6b6b;
        --forms-error-bg: #3b1f22;

        --forms-study-bg: #2a2f34;

        --forms-success-bg: #14271a;
        --forms-success-border: #4cc76a;
        --forms-cancel-bg: #2c2611;
        --forms-cancel-border: #ffd43b;

        --forms-progress-track: #495057;
        --forms-progress-value: #4ea3f0;

        --forms-primary-bg: #0078d4;
        --forms-primary-text: #ffffff;
        --forms-primary-hover-bg: #2b8fe0;

        --forms-secondary-bg: #343a40;
        --forms-secondary-text: #e6e6e6;
        --forms-secondary-border: #868e96;
        --forms-secondary-hover-bg: #495057;
        --forms-secondary-hover-border: #adb5bd;

        --forms-success-btn-bg: #107c10;
        --forms-success-btn-text: #ffffff;
        --forms-success-btn-hover-bg: #0e6b0e;

        --forms-danger-bg: #2a2f34;
        --forms-danger-text: #ff6b6b;
        --forms-danger-border: #ff6b6b;
        --forms-danger-hover-bg: #3b1f22;
    }
}

/* Manual override: explicit Dark wins over the system preference. */
:root[data-theme="dark"] {
    color-scheme: dark;

    --forms-bg: #212529;
    --forms-text: #e6e6e6;
    --forms-muted-text: #ced4da;
    --forms-progress-text: #ced4da;
    --forms-border: #868e96;
    --forms-divider: #495057;
    --forms-focus-ring: #8cc4ff;
    --forms-skiplink-bg: #e9ecef;
    --forms-skiplink-text: #16191c;

    --forms-invalid-border: #ff6b6b;

    --forms-error-text: #ff6b6b;
    --forms-error-border: #ff6b6b;
    --forms-error-bg: #3b1f22;

    --forms-study-bg: #2a2f34;

    --forms-success-bg: #14271a;
    --forms-success-border: #4cc76a;
    --forms-cancel-bg: #2c2611;
    --forms-cancel-border: #ffd43b;

    --forms-progress-track: #495057;
    --forms-progress-value: #4ea3f0;

    --forms-primary-bg: #0078d4;
    --forms-primary-text: #ffffff;
    --forms-primary-hover-bg: #2b8fe0;

    --forms-secondary-bg: #343a40;
    --forms-secondary-text: #e6e6e6;
    --forms-secondary-border: #868e96;
    --forms-secondary-hover-bg: #495057;
    --forms-secondary-hover-border: #adb5bd;

    --forms-success-btn-bg: #107c10;
    --forms-success-btn-text: #ffffff;
    --forms-success-btn-hover-bg: #0e6b0e;

    --forms-danger-bg: #2a2f34;
    --forms-danger-text: #ff6b6b;
    --forms-danger-border: #ff6b6b;
    --forms-danger-hover-bg: #3b1f22;
}

/* Manual override: explicit Light wins over the system preference. */
:root[data-theme="light"] {
    color-scheme: light;

    --forms-bg: #ffffff;
    --forms-text: #000000;
    --forms-muted-text: #444444;
    --forms-progress-text: #555555;
    --forms-border: #767676;
    --forms-divider: #cccccc;
    --forms-focus-ring: #0078d4;
    --forms-skiplink-bg: #111111;
    --forms-skiplink-text: #ffffff;

    --forms-invalid-border: #c42b1c;

    --forms-error-text: #b00020;
    --forms-error-border: #b00020;
    --forms-error-bg: #fff5f6;

    --forms-study-bg: #f0f4f8;

    --forms-success-bg: #dff6dd;
    --forms-success-border: #107c10;
    --forms-cancel-bg: #fff4ce;
    --forms-cancel-border: #c19c00;

    --forms-progress-track: #e0e0e0;
    --forms-progress-value: #0078d4;

    --forms-primary-bg: #0078d4;
    --forms-primary-text: #ffffff;
    --forms-primary-hover-bg: #106ebe;

    --forms-secondary-bg: #f3f3f3;
    --forms-secondary-text: #333333;
    --forms-secondary-border: #cccccc;
    --forms-secondary-hover-bg: #e5e5e5;
    --forms-secondary-hover-border: #999999;

    --forms-success-btn-bg: #107c10;
    --forms-success-btn-text: #ffffff;
    --forms-success-btn-hover-bg: #0b5e0b;

    --forms-danger-bg: #ffffff;
    --forms-danger-text: #c42b1c;
    --forms-danger-border: #c42b1c;
    --forms-danger-hover-bg: #fdf3f2;
}

/* ---- Shared page chrome (was duplicated inline across the Forms pages) ---- */

:root {
    background-color: var(--forms-bg);
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    margin: 24px;
    line-height: 1.5;
    background-color: var(--forms-bg);
    color: var(--forms-text);
}

.skip-link {
    position: absolute;
    left: -999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.skip-link:focus {
    position: static;
    width: auto;
    height: auto;
    padding: 8px 12px;
    background: var(--forms-skiplink-bg);
    color: var(--forms-skiplink-text);
    border-radius: 6px;
    display: inline-block;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
}

select,
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="date"],
input[type="time"] {
    width: 100%;
    padding: 8px;
    font-size: 1rem;
    border: 1px solid var(--forms-border);
    border-radius: 4px;
}

input[type="checkbox"] {
    width: auto;
    padding: 0;
    border: 0;
    border-radius: 0;
}

select:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="checkbox"]:focus {
    outline: 2px solid var(--forms-focus-ring);
    outline-offset: 1px;
}

input:not([type="checkbox"]):invalid:not(:placeholder-shown) {
    border-color: var(--forms-invalid-border);
}

.help {
    color: var(--forms-muted-text);
    font-size: 0.95rem;
    margin-top: 4px;
}

.error,
.validation-summary {
    padding: 12px;
    border: 2px solid var(--forms-error-border);
    color: var(--forms-error-text);
    border-radius: 6px;
    margin: 16px 0;
    max-width: 960px;
    background: var(--forms-error-bg);
}

.validation-summary a {
    color: inherit;
}

.validation-summary ul {
    margin: 8px 0 0;
    padding-left: 20px;
}

.field-has-error input,
.field-has-error select,
.field-has-error textarea {
    border-color: var(--forms-error-border);
}

.field-error {
    margin-top: 6px;
    color: var(--forms-error-text);
    font-size: 0.95rem;
}

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

/* ---- Index page layout ---- */

.row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    max-width: 960px;
}

@media (min-width: 720px) {
    .row {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

fieldset {
    border: 0;
    padding: 0;
    margin: 0;
}

.fields {
    max-width: 720px;
    margin-top: 24px;
}

.field {
    margin-bottom: 16px;
}

.field legend {
    font-weight: 600;
    margin-bottom: 6px;
}

.choice {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-top: 8px;
}

.choice label {
    display: inline;
    font-weight: 400;
    margin: 0;
}

.field-group-title {
    margin: 24px 0 8px;
    font-size: 1.1rem;
}

.study-info {
    background: var(--forms-study-bg);
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.study-info dt {
    font-weight: 600;
    display: inline;
}

.study-info dd {
    display: inline;
    margin: 0 16px 0 4px;
}

.success-message,
.cancel-message {
    padding: 24px;
    border-radius: 6px;
    max-width: 720px;
    margin-top: 24px;
}

.success-message {
    background: var(--forms-success-bg);
    border: 2px solid var(--forms-success-border);
}

.cancel-message {
    background: var(--forms-cancel-bg);
    border: 2px solid var(--forms-cancel-border);
}

/* ---- Settings page ---- */

.actions {
    margin-top: 16px;
}

.back-link {
    margin-top: 24px;
}

.settings-page select {
    max-width: 360px;
}

/* ---- Form navigation view component (was inline in Default.cshtml) ---- */

.form-navigation {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--forms-divider);
}

.progress-indicator {
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: var(--forms-progress-text);
}

.progress-indicator progress {
    display: block;
    width: 100%;
    height: 8px;
    margin-top: 8px;
    border: none;
    border-radius: 4px;
    background: var(--forms-progress-track);
}

.progress-indicator progress::-webkit-progress-bar {
    background: var(--forms-progress-track);
    border-radius: 4px;
}

.progress-indicator progress::-webkit-progress-value {
    background: var(--forms-progress-value);
    border-radius: 4px;
}

.progress-indicator progress::-moz-progress-bar {
    background: var(--forms-progress-value);
    border-radius: 4px;
}

.navigation-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s;
}

.btn:focus {
    outline: 3px solid var(--forms-focus-ring);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--forms-primary-bg);
    color: var(--forms-primary-text);
    border-color: var(--forms-primary-bg);
}

.btn-primary:hover {
    background: var(--forms-primary-hover-bg);
    border-color: var(--forms-primary-hover-bg);
}

.btn-secondary {
    background: var(--forms-secondary-bg);
    color: var(--forms-secondary-text);
    border-color: var(--forms-secondary-border);
}

.btn-secondary:hover {
    background: var(--forms-secondary-hover-bg);
    border-color: var(--forms-secondary-hover-border);
}

.btn-success {
    background: var(--forms-success-btn-bg);
    color: var(--forms-success-btn-text);
    border-color: var(--forms-success-btn-bg);
}

.btn-success:hover {
    background: var(--forms-success-btn-hover-bg);
    border-color: var(--forms-success-btn-hover-bg);
}

.btn-danger {
    background: var(--forms-danger-bg);
    color: var(--forms-danger-text);
    border-color: var(--forms-danger-border);
}

.btn-danger:hover {
    background: var(--forms-danger-hover-bg);
}

.btn-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}