/*!
 * Career DNA System — Frontend CSS
 * v1.12.0 — iOS / Apple-inspired design system foundation.
 *
 * Uses CSS variables injected by CDS_Public::inject_brand_css_vars().
 * This file defines: reset, typography, buttons, inputs, cards, labels,
 * and utility classes. Component-specific layout lives in cds-tests.css.
 */

/* ============================================================
 * RESET & BASE
 * ============================================================ */
.cds-app,
.cds-app *,
.cds-app *::before,
.cds-app *::after {
    box-sizing: border-box;
}

.cds-app {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display',
                 'Poppins', 'Segoe UI', Roboto, sans-serif;
    color: var(--cds-text);
    background: var(--cds-surface-3);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "ss01", "cv11";
    letter-spacing: -0.01em;
}

.cds-app h1,
.cds-app h2,
.cds-app h3,
.cds-app h4,
.cds-app h5,
.cds-app h6 {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display',
                 'Poppins', 'Segoe UI', Roboto, sans-serif;
    color: var(--cds-text);
    letter-spacing: -0.022em;
    line-height: 1.15;
    font-weight: 700;
    margin: 0;
}

.cds-app h1 { font-size: 32px; letter-spacing: -0.03em; }
.cds-app h2 { font-size: 22px; letter-spacing: -0.024em; }
.cds-app h3 { font-size: 18px; letter-spacing: -0.02em; font-weight: 600; }
.cds-app h4 { font-size: 16px; font-weight: 600; }

.cds-app p {
    margin: 0;
    line-height: 1.55;
    color: var(--cds-text);
}

.cds-app a {
    color: var(--cds-primary);
    text-decoration: none;
    transition: color var(--cds-dur-fast) var(--cds-ease);
}
.cds-app a:hover { color: var(--cds-primary-hover); }

::selection { background: var(--cds-primary-ring); color: var(--cds-text); }

.cds-muted { color: var(--cds-text-secondary); }

/* ============================================================
 * PLACEHOLDER (legacy M1)
 * ============================================================ */
.cds-placeholder {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    background: var(--cds-surface-3);
}
.cds-placeholder-card {
    background: var(--cds-surface);
    border: 1px solid var(--cds-border);
    border-radius: var(--cds-radius-lg);
    padding: 48px 56px;
    text-align: center;
    box-shadow: var(--cds-shadow);
    max-width: 520px;
    width: 100%;
}
.cds-placeholder-card h2 {
    color: var(--cds-primary);
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 14px;
    letter-spacing: -0.028em;
}
.cds-placeholder-card p {
    color: var(--cds-text-secondary);
    font-size: 15px;
    line-height: 1.6;
    margin: 8px 0;
}
.cds-placeholder-card code {
    background: var(--cds-surface-3);
    padding: 4px 10px;
    border-radius: var(--cds-radius-xs);
    font-size: 12px;
    color: var(--cds-text);
    border: 1px solid var(--cds-border);
    font-family: ui-monospace, 'SF Mono', Menlo, monospace;
}

/* ============================================================
 * BUTTONS — iOS-style pill filled / tinted / plain
 * ============================================================ */
.cds-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    min-height: 44px;           /* iOS minimum tap target */
    border-radius: var(--cds-radius-pill);
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform var(--cds-dur-fast) var(--cds-ease),
                background-color var(--cds-dur-fast) var(--cds-ease),
                box-shadow var(--cds-dur) var(--cds-ease),
                color var(--cds-dur-fast) var(--cds-ease);
    line-height: 1;
    letter-spacing: -0.01em;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    will-change: transform;
}
.cds-btn:focus-visible {
    outline: none;
    box-shadow: var(--cds-shadow-focus);
}
.cds-btn:active {
    transform: scale(0.97);
}
.cds-btn:disabled,
.cds-btn[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none !important;
}

/* Filled primary */
.cds-btn-primary {
    background: var(--cds-primary);
    color: #fff;
    box-shadow: 0 1px 2px rgba(37,99,235,0.25), 0 4px 12px rgba(37,99,235,0.18);
}
/* Specificity override: ".cds-app a" in the base rules has higher specificity
 * than ".cds-btn-primary" and would paint anchor buttons in the primary color,
 * making blue-on-blue. Pin anchor + button variants to white for all states. */
a.cds-btn-primary,
a.cds-btn-primary:link,
a.cds-btn-primary:visited,
a.cds-btn-primary:hover,
a.cds-btn-primary:focus,
a.cds-btn-primary:active,
button.cds-btn-primary,
.cds-app a.cds-btn-primary {
    color: #fff;
}
a.cds-btn-accent,
a.cds-btn-accent:link,
a.cds-btn-accent:visited,
a.cds-btn-accent:hover,
a.cds-btn-accent:focus,
a.cds-btn-accent:active,
.cds-app a.cds-btn-accent {
    color: #fff;
}
.cds-btn-primary:hover {
    background: var(--cds-primary-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(37,99,235,0.28), 0 8px 20px rgba(37,99,235,0.22);
}
.cds-btn-primary:active {
    background: var(--cds-primary-pressed);
    transform: scale(0.97);
}

/* Filled accent */
.cds-btn-accent {
    background: var(--cds-accent);
    color: #fff;
    box-shadow: 0 1px 2px rgba(245,158,11,0.25), 0 4px 12px rgba(245,158,11,0.18);
}
.cds-btn-accent:hover {
    background: #D97706;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(245,158,11,0.28), 0 8px 20px rgba(245,158,11,0.22);
}

/* Tinted (soft fill — iOS "Tinted Button") */
.cds-btn-ghost {
    background: var(--cds-primary-soft);
    color: var(--cds-primary);
    border-color: transparent;
    box-shadow: none;
}
.cds-btn-ghost:hover {
    background: rgba(37, 99, 235, 0.14);
    color: var(--cds-primary-hover);
    transform: translateY(-1px);
}

/* Plain (text-only) */
.cds-btn-plain {
    background: transparent;
    color: var(--cds-primary);
    border-color: transparent;
    box-shadow: none;
    padding: 10px 14px;
    min-height: 36px;
}
.cds-btn-plain:hover {
    background: var(--cds-primary-soft);
    color: var(--cds-primary-hover);
}

/* Size variants */
.cds-btn-sm {
    padding: 8px 16px;
    min-height: 36px;
    font-size: 13px;
    border-radius: var(--cds-radius-pill);
}
.cds-btn-lg {
    padding: 16px 28px;
    min-height: 52px;
    font-size: 16px;
}

/* ============================================================
 * INPUTS — tall, rounded, iOS-style
 * ============================================================ */
.cds-input,
.cds-app input[type="text"],
.cds-app input[type="email"],
.cds-app input[type="password"],
.cds-app input[type="tel"],
.cds-app input[type="number"],
.cds-app input[type="date"],
.cds-app input[type="search"],
.cds-app input[type="url"],
.cds-app select,
.cds-app textarea {
    width: 100%;
    padding: 13px 16px;
    min-height: 46px;
    border: 1px solid var(--cds-border);
    border-radius: var(--cds-radius);
    font-family: inherit;
    font-size: 15px;
    color: var(--cds-text);
    background: var(--cds-surface);
    transition: border-color var(--cds-dur-fast) var(--cds-ease),
                box-shadow    var(--cds-dur-fast) var(--cds-ease),
                background-color var(--cds-dur-fast) var(--cds-ease);
    line-height: 1.3;
    letter-spacing: -0.005em;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}
.cds-input:hover,
.cds-app input:hover,
.cds-app select:hover,
.cds-app textarea:hover {
    border-color: var(--cds-border-strong);
}
.cds-input:focus,
.cds-app input:focus,
.cds-app select:focus,
.cds-app textarea:focus {
    outline: none;
    border-color: var(--cds-primary);
    box-shadow: var(--cds-shadow-focus);
}
.cds-input:disabled,
.cds-app input:disabled,
.cds-app select:disabled,
.cds-app textarea:disabled {
    background: var(--cds-surface-3);
    color: var(--cds-text-tertiary);
    cursor: not-allowed;
    border-color: var(--cds-border);
}
.cds-app textarea { resize: vertical; min-height: 84px; }

/* Select chevron (iOS style) */
.cds-app select {
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236E6E73' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 16px;
    padding-right: 42px;
}

.cds-input-sm {
    padding: 9px 12px;
    min-height: 36px;
    font-size: 13px;
    border-radius: var(--cds-radius-sm);
}

.cds-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--cds-text);
    margin-bottom: 6px;
    letter-spacing: -0.005em;
}

.cds-error-text {
    color: var(--cds-error);
    font-size: 13px;
    margin-top: 6px;
}
.cds-success-text {
    color: var(--cds-success);
    font-size: 13px;
    margin-top: 6px;
}

/* ============================================================
 * CARDS — iOS grouped style
 * ============================================================ */
.cds-card {
    background: var(--cds-surface);
    border: 1px solid var(--cds-border);
    border-radius: var(--cds-radius-lg);
    padding: 28px;
    box-shadow: var(--cds-shadow-sm);
    transition: box-shadow var(--cds-dur) var(--cds-ease),
                transform  var(--cds-dur) var(--cds-ease),
                border-color var(--cds-dur) var(--cds-ease);
}
.cds-card:hover {
    box-shadow: var(--cds-shadow);
}

/* ============================================================
 * CHIPS
 * ============================================================ */
.cds-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--cds-primary);
    background: var(--cds-primary-soft);
    border-radius: var(--cds-radius-pill);
    letter-spacing: -0.005em;
}

/* ============================================================
 * LOADING SPINNER
 * ============================================================ */
.cds-spinner-large {
    width: 40px;
    height: 40px;
    border: 3px solid var(--cds-border);
    border-top-color: var(--cds-primary);
    border-radius: 50%;
    animation: cds-spin 0.8s linear infinite;
}
@keyframes cds-spin { to { transform: rotate(360deg); } }

/* ============================================================
 * RESPONSIVE
 * ============================================================ */
@media (max-width: 640px) {
    .cds-app h1 { font-size: 26px; }
    .cds-app h2 { font-size: 19px; }
    .cds-card { padding: 20px; border-radius: var(--cds-radius); }
    .cds-placeholder-card { padding: 32px 24px; }
    .cds-placeholder-card h2 { font-size: 22px; }
}

/* ============================================================
 * MOTION / REDUCED MOTION
 * ============================================================ */
@media (prefers-reduced-motion: reduce) {
    .cds-app *,
    .cds-app *::before,
    .cds-app *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

/* ============================================================
 * 1.19.0 — PWA Install Card
 * ============================================================
 *
 * Compact card injected into the participant + manager dashboards
 * to prompt users to install the PWA. Three internal variants:
 *   - .cds-pwa-variant-prompt    (Android Chrome native prompt)
 *   - .cds-pwa-variant-ios       (iOS Safari instructions)
 *   - .cds-pwa-variant-fallback  (other browsers)
 *
 * Visibility is JS-controlled — the card renders display:none and
 * cds-pwa.js shows it once it confirms the user is on a platform
 * where install is possible AND not already installed AND not
 * recently dismissed.
 *
 * Visual style: subtle blue gradient card with a dismiss X in the
 * top-right corner. Designed to feel like a soft suggestion, not
 * a blocking modal. Sits naturally between the hero and "My Tests"
 * sections without dominating the page.
 */
.cds-pwa-install-card {
    position: relative;
    margin: 16px 0 24px;
    padding: 20px 24px;
    background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
    border: 1px solid #BFDBFE;
    border-radius: 14px;
    box-shadow: 0 1px 3px rgba(30, 58, 138, 0.06);
}

.cds-pwa-card-inner {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.cds-pwa-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid #BFDBFE;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(30, 58, 138, 0.08);
}
.cds-pwa-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.cds-pwa-content {
    flex: 1;
    min-width: 0;
}

.cds-pwa-title {
    margin: 0 0 4px;
    font-size: 17px;
    font-weight: 700;
    color: #1E3A8A;
    line-height: 1.3;
}

.cds-pwa-subtitle {
    margin: 0 0 12px;
    font-size: 14px;
    color: #1E40AF;
    line-height: 1.5;
}
.cds-pwa-subtitle strong {
    font-weight: 600;
}

/* Dismiss button (X in top-right) */
.cds-pwa-dismiss {
    position: absolute;
    top: 8px;
    right: 10px;
    width: 28px;
    height: 28px;
    background: transparent;
    border: 0;
    color: #1E40AF;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    border-radius: 6px;
    opacity: 0.6;
    transition: opacity 0.15s, background 0.15s;
}
.cds-pwa-dismiss:hover,
.cds-pwa-dismiss:focus {
    opacity: 1;
    background: rgba(30, 64, 175, 0.08);
    outline: none;
}

/* Variant A — Android Chrome native install prompt button */
.cds-pwa-variant-prompt .cds-btn {
    margin: 0;
}

/* Variant B — iOS Safari add-to-home-screen instructions */
.cds-pwa-ios-steps {
    margin: 8px 0 0;
    padding: 0 0 0 18px;
    list-style: decimal;
    color: #1E40AF;
    font-size: 14px;
    line-height: 1.7;
}
.cds-pwa-ios-steps li {
    margin-bottom: 2px;
}
.cds-pwa-ios-steps strong {
    font-weight: 600;
}
.cds-pwa-icon-inline {
    display: inline-block;
    font-size: 16px;
    margin: 0 2px;
    color: #2563EB;
    transform: translateY(1px);
}

/* Variant C — generic browser-menu fallback */
.cds-pwa-fallback-hint {
    margin: 4px 0 0;
    font-size: 14px;
    color: #1E40AF;
    line-height: 1.5;
    font-style: italic;
}

/* Mobile responsive — stack icon above content on narrow screens */
@media (max-width: 480px) {
    .cds-pwa-install-card {
        padding: 16px 18px;
    }
    .cds-pwa-card-inner {
        flex-direction: column;
        gap: 12px;
    }
    .cds-pwa-icon {
        width: 48px;
        height: 48px;
    }
    .cds-pwa-title {
        font-size: 16px;
    }
}