:root {
    --color-bg: #eef1f6;
    --color-surface: #ffffff;
    --color-text: #1a1f36;
    --color-text-muted: #5c6370;
    --color-border: #d8dee9;
    --color-primary: #3b5bdb;
    --color-primary-hover: #2f4bc7;
    --color-primary-soft: #e8edff;
    --color-success: #1e7e34;
    --color-success-bg: #d4edda;
    --color-danger: #c92a2a;
    --color-danger-bg: #fde8e8;
    --color-warning: #856404;
    --color-warning-bg: #fff3cd;
    --color-info-bg: #d1ecf1;
    --color-admin: #16213e;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.08);
    --shadow-md: 0 8px 24px rgba(16, 24, 40, 0.1);
    --space-xs: 0.35rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    --touch-min: 44px;
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.55;
    min-height: 100vh;
}

body.apply-page {
    background: linear-gradient(160deg, #e8edff 0%, var(--color-bg) 45%, #f5f7fb 100%);
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-md);
    padding-bottom: calc(var(--space-xl) + env(safe-area-inset-bottom, 0px));
}

.container.admin-container {
    max-width: 1100px;
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.card-narrow {
    max-width: 420px;
    margin: 3rem auto;
}

.page-header {
    margin-bottom: var(--space-lg);
}

.page-header h1 {
    margin-bottom: var(--space-sm);
}

.page-header .subtitle {
    margin-bottom: 0;
}

h1 {
    font-size: clamp(1.4rem, 4vw, 1.85rem);
    margin-bottom: var(--space-md);
    color: var(--color-text);
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.subtitle {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    font-size: 1rem;
}

.note,
.hint {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    margin-bottom: var(--space-md);
}

.note a,
.hint a {
    color: var(--color-primary);
}

/* Forms */
.form-section {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    background: #fafbfc;
}

.form-section legend {
    font-weight: 600;
    padding: 0 var(--space-sm);
    color: var(--color-text);
    font-size: 1rem;
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    font-size: 0.92rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="search"],
.form-group select,
.form-group textarea,
.table-input {
    width: 100%;
    min-height: var(--touch-min);
    padding: 0.7rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 16px;
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
    -webkit-appearance: none;
    appearance: none;
}

.form-group select {
    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='%235c6370' d='M1.4.4 6 5l4.6-4.6L12 2.8 6 8.8 0 2.8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.85rem center;
    padding-right: 2.25rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.table-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 91, 219, 0.18);
}

.form-group textarea {
    min-height: 5rem;
    resize: vertical;
}

.inline-form {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: var(--space-sm);
}

.form-group.inline {
    margin-bottom: 0;
    flex: 1 1 auto;
    min-width: 140px;
}

.form-group.inline label {
    display: block;
    margin-right: 0;
    margin-bottom: var(--space-xs);
}

.form-group.inline input[type="number"],
.form-group.inline input[type="text"] {
    width: 100%;
    max-width: 100%;
}

/* Apply form — preference rows */
.pref-progress {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-primary-soft);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    font-size: 0.92rem;
}

.pref-progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(59, 91, 219, 0.2);
    border-radius: 999px;
    overflow: hidden;
}

.pref-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 999px;
    transition: width 0.25s ease;
    width: 0%;
}

.pref-row {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-md);
    align-items: center;
    padding: var(--space-md);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.pref-row:last-child {
    margin-bottom: 0;
}

.pref-row.required-missing select:invalid,
.pref-row.has-error select {
    border-color: var(--color-danger);
}

.pref-rank {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--color-primary-soft);
    color: var(--color-primary);
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.pref-row.optional .pref-rank {
    background: #f1f3f5;
    color: var(--color-text-muted);
}

.pref-row-locked {
    opacity: 0.6;
}

.pref-row-locked .pref-rank {
    background: #e9ecef;
    color: #adb5bd;
}

.pref-row-locked select {
    cursor: not-allowed;
    background: #f1f3f5;
    color: var(--color-text-muted);
}

.pref-label-text {
    display: block;
    font-weight: 600;
    font-size: 0.88rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text-muted);
}

.form-error-banner {
    display: none;
    padding: var(--space-md);
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    font-size: 0.92rem;
}

.form-error-banner.visible {
    display: block;
}

.form-actions {
    margin-top: var(--space-lg);
}

.form-actions .btn {
    width: 100%;
}

.success-banner {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
}

.success-banner .success-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    min-height: var(--touch-min);
    padding: 0.65rem 1.25rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, transform 0.1s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-secondary {
    background: #e9ecef;
    color: var(--color-text);
}

.btn-secondary:hover {
    background: #dee2e6;
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.btn-danger:hover {
    background: #a61e1e;
}

.btn-sm {
    min-height: 36px;
    padding: 0.4rem 0.75rem;
    font-size: 0.88rem;
}

.btn-lg {
    min-height: 52px;
    padding: 0.85rem 1.75rem;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
}

/* Flash messages */
.flash-messages {
    margin-bottom: var(--space-md);
}

.flash {
    padding: 0.85rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-sm);
}

.flash-dismiss {
    background: none;
    border: none;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.6;
    padding: 0 0.25rem;
    min-height: auto;
}

.flash-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid #b8dfc4;
}

.flash-error {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid #f5c2c2;
}

.flash-info {
    background: var(--color-info-bg);
    color: #0c5460;
    border: 1px solid #abdde5;
}

.flash-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid #ffc107;
}

.alert {
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
}

.alert-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid #ffc107;
}

/* Admin nav */
.admin-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-admin);
    color: #fff;
    padding: 0.85rem var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    gap: var(--space-sm);
}

.nav-brand {
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    gap: 0.35rem;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    max-width: 100%;
}

.nav-links::-webkit-scrollbar {
    display: none;
}

.nav-links a {
    color: #b8c0d4;
    text-decoration: none;
    font-size: 0.88rem;
    padding: 0.45rem 0.65rem;
    border-radius: 6px;
    white-space: nowrap;
    flex-shrink: 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: #f8f9fb;
    border-radius: var(--radius-sm);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    border: 1px solid var(--color-border);
}

.stat-value {
    font-size: clamp(1.4rem, 4vw, 1.75rem);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.action-section {
    background: #f8f9fb;
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border: 1px solid var(--color-border);
}

.action-section p {
    margin-bottom: var(--space-md);
    color: var(--color-text-muted);
}

.quick-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.share-link-box {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: stretch;
    margin-top: var(--space-sm);
}

.share-link-box input {
    flex: 1 1 200px;
    min-width: 0;
    min-height: var(--touch-min);
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    background: #fff;
}

.settings-section {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.status-badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
}

.status-open {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.status-closed {
    background: var(--color-danger-bg);
    color: var(--color-danger);
}

/* Tables */
.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 calc(-1 * var(--space-sm));
    padding: 0 var(--space-sm);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

thead th {
    background: #f8f9fb;
    text-align: left;
    padding: 0.7rem 0.75rem;
    font-weight: 600;
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

tbody td {
    padding: 0.7rem 0.75rem;
    border-bottom: 1px solid #eef1f5;
    vertical-align: middle;
}

.table-input {
    min-height: 36px;
    padding: 0.4rem 0.55rem;
    font-size: 0.9rem;
}

.table-input-sm {
    width: 70px;
}

.actions {
    white-space: nowrap;
}

.actions form,
.actions .inline-form {
    display: inline-flex;
    vertical-align: middle;
}

.row-warning {
    background: var(--color-warning-bg);
}

.row-danger {
    background: var(--color-danger-bg);
}

.row-hidden {
    display: none !important;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.results-header h1 {
    margin-bottom: 0;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.55rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
}

.badge-manual {
    background: var(--color-info-bg);
    color: #0c5460;
}

.import-report {
    border-radius: var(--radius-sm);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-lg);
}

.import-report-success {
    background: var(--color-success-bg);
    border: 1px solid #b8dfc4;
}

.import-report-warning {
    background: var(--color-warning-bg);
    border: 1px solid #ffc107;
}

.import-report-error {
    background: var(--color-danger-bg);
    border: 1px solid #f5c2c2;
}

.import-report h2 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
}

.import-errors ul,
.import-warnings ul {
    margin: var(--space-sm) 0 0 1.25rem;
    font-size: 0.9rem;
}

.import-errors li,
.import-warnings li {
    margin-bottom: var(--space-xs);
}

.text-success {
    color: var(--color-success);
}

.text-danger {
    color: var(--color-danger);
}

.pref-list {
    font-size: 0.85rem;
    max-width: 280px;
    line-height: 1.45;
}

.import-export-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: var(--space-md);
}

.import-form {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: var(--space-sm);
    flex: 1 1 240px;
}

.import-form input[type="file"] {
    font-size: 0.9rem;
    min-height: var(--touch-min);
    flex: 1 1 160px;
}

.search-box {
    margin-bottom: var(--space-md);
}

.search-box input {
    width: 100%;
    max-width: 400px;
}

.mission-row-form {
    display: contents;
}

.mission-row-form td {
    vertical-align: middle;
}

.manual-assign-cell .inline-form {
    flex-direction: column;
    align-items: stretch;
}

.manual-assign-cell select {
    min-width: 140px;
}

/* Responsive — mobile cards for participant tables */
@media (max-width: 768px) {
    .container {
        padding: var(--space-sm);
    }

    .card {
        padding: var(--space-lg) var(--space-md);
        border-radius: var(--radius-md);
    }

    .admin-nav {
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-md);
    }

    .nav-links {
        padding-bottom: 2px;
    }

    .pref-row {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .pref-rank {
        width: 2rem;
        height: 2rem;
        font-size: 0.8rem;
    }

    .quick-links .btn {
        flex: 1 1 calc(50% - var(--space-sm));
        min-width: 140px;
    }

    .results-header .btn {
        width: 100%;
    }

    .responsive-table thead {
        display: none;
    }

    .responsive-table tbody tr {
        display: block;
        margin-bottom: var(--space-md);
        padding: var(--space-md);
        background: #fafbfc;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
    }

    .responsive-table tbody td {
        display: block;
        padding: 0.35rem 0;
        border: none;
        text-align: left;
    }

    .responsive-table tbody td::before {
        content: attr(data-label);
        display: block;
        font-weight: 600;
        font-size: 0.78rem;
        text-transform: uppercase;
        letter-spacing: 0.03em;
        color: var(--color-text-muted);
        margin-bottom: 0.15rem;
    }

    .responsive-table tbody td.actions::before,
    .responsive-table tbody td.manual-assign-cell::before {
        margin-top: var(--space-sm);
    }

    .responsive-table .inline-form {
        width: 100%;
    }

    .responsive-table .inline-form select {
        width: 100%;
    }

    .share-link-box {
        flex-direction: column;
    }

    .share-link-box .btn {
        width: 100%;
    }
}

@media (min-width: 600px) {
    .form-actions .btn {
        width: auto;
        min-width: 220px;
    }
}