/* ─── Design tokens (Open Design system) ─────────────────────────────────── */
:root {
    --bg: #fafaf7;
    --surface: #ffffff;
    --fg: #1a1916;
    --muted: #6b6964;
    --border: #e8e5df;
    --ecap-brown: rgb(110, 70, 50);
    --ecap-brown-hover: rgb(90, 55, 40);
    --ecap-brown-light: rgb(220, 170, 140);
    --accent: var(--ecap-brown);
    --accent-soft: color-mix(in oklch, var(--accent) 14%, transparent);
    --fg-soft: color-mix(in oklch, var(--fg) 6%, transparent);

    --fs-h1: clamp(32px, 4vw, 48px);
    --fs-h2: clamp(24px, 3vw, 36px);
    --fs-h3: 20px;
}

/* ─── Reset & base ─────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* ─── Typography ───────────────────────────────────────────────────────── */
h1, h2, h3, h4 {
    font-family: 'Iowan Old Style', 'Charter', Georgia, 'Times New Roman', serif;
    line-height: 1.15;
    letter-spacing: -0.015em;
    text-wrap: balance;
}

.h1, h1 { font-size: var(--fs-h1); margin: 0; }
.h2, h2 { font-size: var(--fs-h2); margin: 0; }
.h3, h3 { font-size: var(--fs-h3); margin: 0; }
.h4, h4 { font-size: 17px; margin: 0; }

.meta {
    font-family: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.04em;
}

.num {
    font-family: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    font-variant-numeric: tabular-nums;
}

/* ─── Layout ───────────────────────────────────────────────────────────── */
.container {
    max-width: 1400px;
    margin-inline: auto;
    padding-inline: 32px;
}

body > .container { padding: 0; }

/* ─── Topnav (header estilo web ECAP) ─────────────────────────────────── */
.topnav {
    background: var(--ecap-brown);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.topnav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 12px;
}

.topnav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.topnav-logo {
    height: 42px;
    width: auto;
}

.topnav-title {
    color: rgba(255, 255, 255, 0.9);
    font-family: 'Iowan Old Style', 'Charter', Georgia, serif;
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.topnav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.topnav-user {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

.topnav .btn-logout {
    background: transparent;
    color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.topnav .btn-logout:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

/* ─── Buttons ──────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 20px;
    border-radius: 10px;
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: -0.005em;
    transition: transform 0.05s ease, background 0.15s ease, border-color 0.15s ease;
    cursor: pointer;
    text-decoration: none;
}

.btn:active { transform: translateY(1px); }

.btn-sm {
    padding: 7px 14px;
    font-size: 13px;
}

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

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

.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
    background: transparent;
    color: var(--fg);
    border-color: var(--border);
}

.btn-secondary:hover { border-color: var(--fg); }

.btn-ghost {
    background: transparent;
    color: var(--fg);
    border-color: transparent;
    padding-inline: 8px;
}

.btn-ghost:hover { color: var(--accent); }

.btn-outline-primary {
    background: transparent;
    color: var(--ecap-brown);
    border-color: var(--ecap-brown);
}
.btn-outline-primary:hover { background: var(--accent-soft); }

.btn-outline-danger {
    background: transparent;
    color: #dc3545;
    border-color: #dc3545;
}
.btn-outline-danger:hover { background: color-mix(in oklch, #dc3545 12%, transparent); }

.btn-outline-warning {
    background: transparent;
    color: #e6a819;
    border-color: #e6a819;
}
.btn-outline-warning:hover { background: color-mix(in oklch, #e6a819 12%, transparent); }

.btn-success {
    background: #198754;
    color: #fff;
    border-color: #198754;
}
.btn-success:hover { background: color-mix(in oklch, #198754 85%, black); }

.btn-danger {
    background: #dc3545;
    color: #fff;
    border-color: #dc3545;
}
.btn-danger:hover { background: color-mix(in oklch, #dc3545 85%, black); }

/* ─── Card ─────────────────────────────────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px;
}

.card-flat {
    background: transparent;
    border: 0;
    padding: 0;
}

/* ─── Form fields ──────────────────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 6px; }
.field-label { font-size: 12px; color: var(--muted); font-weight: 500; }

.input, .textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--fg);
    font-size: 15px;
    font-family: inherit;
    line-height: 1.55;
}

.input:focus, .textarea:focus {
    outline: 2px solid var(--accent-soft);
    border-color: var(--accent);
}

select.input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b6964' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

select.input[multiple] {
    appearance: auto;
    background-image: none;
    padding-right: 14px;
}

/* ─── Table ────────────────────────────────────────────────────────────── */
.table-responsive {
    overflow-x: auto;
}

.ds-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.ds-table th, .ds-table td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.ds-table th {
    color: var(--muted);
    font-weight: 500;
    font-family: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    font-size: 12px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.ds-table tbody tr:hover { background: var(--fg-soft); }

.ds-table .num-col {
    font-family: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    font-variant-numeric: tabular-nums;
    text-align: right;
}

/* ─── Tabs ─────────────────────────────────────────────────────────────── */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--ecap-brown);
    margin-bottom: 28px;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--muted);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.15s ease, background 0.15s ease;
}

.tab-btn:hover {
    color: var(--fg);
    background: var(--fg-soft);
}

.tab-btn.active {
    color: var(--ecap-brown);
    background: var(--surface);
    border: 1px solid var(--ecap-brown);
    border-bottom-color: transparent;
    border-radius: 8px 8px 0 0;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ─── Accordion ────────────────────────────────────────────────────────── */
.accordion {
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    overflow: hidden;
}

.accordion-header {
    margin: 0;
}

.accordion-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 20px;
    border: none;
    background: var(--surface);
    color: var(--fg);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.15s ease;
}

.accordion-toggle:hover { background: var(--fg-soft); }

.accordion-toggle::after {
    content: '';
    margin-left: auto;
    width: 12px;
    height: 12px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b6964' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    transition: transform 0.2s ease;
}

.accordion-toggle[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

.accordion-body {
    display: none;
    padding: 24px 20px;
    border-top: 1px solid var(--border);
}

.accordion-body.open {
    display: block;
}

/* ─── Modal ────────────────────────────────────────────────────────────── */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 100;
    justify-content: center;
    align-items: center;
    padding: 32px;
}

.modal-overlay.open {
    display: flex;
}

.modal-content {
    width: 100%;
    max-width: 720px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 28px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border: none;
    background: transparent;
    color: var(--muted);
    font-size: 20px;
    cursor: pointer;
    border-radius: 8px;
    transition: color 0.15s ease, background 0.15s ease;
}

.modal-close:hover {
    color: var(--fg);
    background: var(--fg-soft);
}

.modal-body {
    padding: 28px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 28px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

/* ─── Courses checkbox grid ────────────────────────────────────────────── */
#edit-courses-checkboxes {
    max-height: 400px;
    overflow-y: auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
}

#edit-courses-checkboxes .edit-course-item {
    padding: 4px 0;
}

#edit-courses-checkboxes input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

#edit-courses-checkboxes .course-label {
    word-break: break-word;
    white-space: normal;
    font-size: 14px;
    cursor: pointer;
}

#edit-student-nombre,
#edit-student-apellidos,
#edit-student-dni,
#edit-student-email,
#edit-student-moodle-user {
    word-break: break-word;
}

/* ─── Container for tab content ────────────────────────────────────────── */
.tab-content-area {
    padding-inline: 32px;
    padding-block: 36px;
}

/* ─── Alert / message ─────────────────────────────────────────────────── */
.alert {
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--fg);
    padding: 12px 16px;
}

.alert-success {
    border-color: #198754;
    background: color-mix(in oklch, #198754 8%, var(--surface));
    color: #198754;
}

.alert-danger {
    border-color: #dc3545;
    background: color-mix(in oklch, #dc3545 8%, var(--surface));
    color: #dc3545;
}

.alert-warning {
    border-color: #e6a819;
    background: color-mix(in oklch, #e6a819 10%, var(--surface));
    color: #8a6d0b;
}

/* ─── Auth container ──────────────────────────────────────────────────── */
#auth-container {
    max-width: 520px;
    margin: 80px auto;
    padding-inline: 32px;
}

#login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ─── Bulk action bar ─────────────────────────────────────────────────── */
.bulk-bar {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

/* ─── Pagination ───────────────────────────────────────────────────────── */
#student-pagination {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
}

#student-pagination .page-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 400;
    cursor: pointer;
    background: var(--surface);
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

#student-pagination .page-button:hover:not(.disabled) {
    background: var(--fg-soft);
    border-color: var(--fg);
}

#student-pagination .page-button.active {
    background: var(--ecap-brown);
    border-color: var(--ecap-brown);
    color: #fff;
    font-weight: 500;
}

#student-pagination .page-button.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

#student-pagination .pagination-info {
    font-size: 13px;
    color: var(--muted);
    margin-left: 12px;
}

/* ─── Spinner ──────────────────────────────────────────────────────────── */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--ecap-brown);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner-border {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.125em;
    border: 0.15em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ─── Table loading overlay ────────────────────────────────────────────── */
.table-loading-overlay {
    position: absolute;
    inset: 0;
    background: color-mix(in oklch, var(--bg) 85%, transparent);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    z-index: 10;
    border-radius: 16px;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.table-loading-overlay.visible {
    opacity: 1;
}

.table-loading-overlay .spinner {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

.table-loading-overlay .spinner-text {
    font-size: 13px;
    color: var(--muted);
}

/* ─── Badge ────────────────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}

.badge-light {
    background: var(--fg-soft);
    color: var(--fg);
    border: 1px solid var(--border);
}

.bg-primary {
    background: var(--ecap-brown);
    color: #fff;
}

.bg-secondary {
    background: var(--fg-soft);
    color: var(--fg);
    border: 1px solid var(--border);
}

.bg-info {
    background: color-mix(in oklch, #0dcaf0 16%, var(--fg-soft));
    color: var(--fg);
    border: 1px solid color-mix(in oklch, #0dcaf0 30%, var(--border));
}

.bg-light {
    background: var(--fg-soft);
    color: var(--fg);
    border: 1px solid var(--border);
}

/* ─── Action buttons (table cells) ─────────────────────────────────────── */
.student-actions {
    display: flex;
    gap: 6px;
    justify-content: center;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.action-btn:hover {
    border-color: var(--fg);
    color: var(--fg);
    background: var(--fg-soft);
}

.action-btn--delete:hover {
    border-color: #dc3545;
    color: #dc3545;
    background: color-mix(in oklch, #dc3545 10%, var(--surface));
}

.action-btn--contract:hover {
    border-color: var(--ecap-brown);
    color: var(--ecap-brown);
}

.action-btn--edit:hover {
    border-color: #e6a819;
    color: #e6a819;
    background: color-mix(in oklch, #e6a819 10%, var(--surface));
}

.action-btn--approve:hover {
    border-color: #198754;
    color: #198754;
    background: color-mix(in oklch, #198754 10%, var(--surface));
}

.action-btn--reject:hover {
    border-color: #dc3545;
    color: #dc3545;
    background: color-mix(in oklch, #dc3545 10%, var(--surface));
}

.candidate-actions {
    display: flex;
    gap: 6px;
    justify-content: center;
}

/* ─── Helpers ──────────────────────────────────────────────────────────── */
.mb-1 { margin-bottom: 4px !important; }
.mb-2 { margin-bottom: 8px !important; }
.mb-3 { margin-bottom: 12px !important; }
.mb-4 { margin-bottom: 20px !important; }
.mt-2 { margin-top: 8px !important; }
.mt-3 { margin-top: 12px !important; }
.mt-4 { margin-top: 20px !important; }
.me-1 { margin-right: 4px !important; }
.me-2 { margin-right: 8px !important; }
.w-100 { width: 100% !important; }
.text-center { text-align: center !important; }
.text-end { text-align: right !important; }
.fw-bold { font-weight: 700 !important; }
.d-none { display: none !important; }
.d-flex { display: flex !important; }
.p-0 { padding: 0 !important; }
.small { font-size: 13px !important; }
.py-4 { padding-top: 20px !important; padding-bottom: 20px !important; }
.center { text-align:center; justify-content:center;}

/* ─── Checkbox custom ─────────────────────────────────────────────────── */
.row-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.stack {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.card-header-custom {
    padding: 20px 28px 16px;
    border-bottom: 1px solid var(--border);
}

.card-footer-custom {
    padding: 16px 28px;
    border-top: 1px solid var(--border);
}

/* ─── Student list: sticky pagination ──────────────────────────────────── */
.students-card-wrapper {
    position: relative;
    max-height: calc(100vh - 200px);
    display: flex;
    flex-direction: column;
}

.students-card-wrapper .table-responsive {
    flex: 1;
    overflow-y: auto;
    position: relative;
}

.students-card-wrapper .card-footer-custom {
    flex-shrink: 0;
    position: sticky;
    bottom: 0;
    background: var(--surface);
    z-index: 5;
    border-top: 1px solid var(--border);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.04);
    padding: 12px 28px;
}

.max-w-480 { max-width: 480px; }
.max-w-60 { max-width: 60%; }

.signature-img {
    max-width: 100px;
    cursor: pointer;
}

/* ─── Checkbox custom ─────────────────────────────────────────────────── */
input[type="checkbox"] {
    accent-color: var(--accent);
    cursor: pointer;
}

.form-check-input {
    accent-color: var(--accent);
    cursor: pointer;
}

/* ─── HR ───────────────────────────────────────────────────────────────── */
hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 0;
}

/* ─── Text / color helpers ─────────────────────────────────────────────── */
.text-muted { color: var(--muted); }
.text-dark { color: var(--fg); }
.border { border: 1px solid var(--border) !important; }
.shadow-sm { box-shadow: 0 1px 3px rgba(0,0,0,0.08); }

/* ─── List group ───────────────────────────────────────────────────────── */
.list-group {
    list-style: none;
    padding: 0;
    margin: 0;
}

.list-group-item {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 4px;
    font-size: 14px;
    background: var(--fg-soft);
}

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

/* ─── Course radio group ───────────────────────────────────────────────── */
.course-radio-group {
    display: flex;
    gap: 12px;
}

.form-check-inline {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.code {
    font-family: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    font-size: 12px;
    background: var(--fg-soft);
    padding: 2px 6px;
    border-radius: 4px;
}

/* ─── Individual course pills in student table ─────────────────────────── */
.course-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
}

.course-pill {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 500;
    background: var(--fg-soft);
    color: var(--fg);
    border: 1px solid var(--border);
    white-space: nowrap;
}

/* ─── Edit courses button in courses column ────────────────────────────── */
.course-pills-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
}

.edit-courses-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
    flex-shrink: 0;
}

.edit-courses-btn:hover {
    border-color: #e6a819;
    color: #e6a819;
    background: color-mix(in oklch, #e6a819 10%, var(--surface));
}

/* ─── Responsive ───────────────────────────────────────────────────────── */
@media (max-width: 920px) {
    .topnav-inner { padding-inline: 16px; }
    .container { padding-inline: 16px; }
    .tab-content-area { padding-inline: 16px; }
    #auth-container { margin: 40px auto; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    .modal-overlay { padding: 16px; }

    .topnav-actions .topnav-user { display: none; }
    .topnav-title { display: none; }
    .topnav-logo { height: 32px; }
}

@media (max-width: 640px) {
    .bulk-bar { flex-direction: column; align-items: stretch; text-align: center; }
    .bulk-bar > div:last-child { justify-content: center; }
}

/* ─── Signup-specific styles ────────────────────────────────────────────── */

/* Signup container */
.signup-container {
    max-width: 640px;
    margin: 0 auto;
    padding: 32px 20px 60px;
}

/* Course grid */
.course-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.course-category-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.course-category-section:last-child {
    margin-bottom: 0;
}

.course-category-header {
    font-family: 'Iowan Old Style', 'Charter', Georgia, 'Times New Roman', serif;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.015em;
    color: var(--muted);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 4px;
}

.course-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
    user-select: none;
}

.course-card:hover {
    border-color: var(--fg);
    background: var(--fg-soft);
}

.course-card.selected {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.course-card input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
}

.course-card-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    flex: 1;
}

.course-card-name {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.3;
    word-break: break-word;
}

.course-card-desc {
    font-size: 12px;
    color: var(--muted);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card-status {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 500;
}

.course-card-status.is-open {
    color: var(--success, #198754);
}

.course-card-status.is-closed {
    color: var(--warning, #fd7e14);
}

/* Selection label (below course grid) */
.selection-label {
    font-family: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 6px;
}

/* Selected courses summary (top of step-1) */
.selected-courses-summary {
    display: block;
    margin-bottom: 12px;
    font-size: 13px;
    line-height: 1.6;
}

/* Date part inputs */
.date-parts {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

.date-parts .input {
    text-align: center;
}

/* Form group */
.signup-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.signup-field .field-label {
    font-size: 12px;
    color: var(--muted);
    font-weight: 500;
    letter-spacing: -0.005em;
}

.signup-field .input,
.signup-field .select {
    width: 100%;
}

.signup-field .field-error {
    font-size: 13px;
    color: var(--danger, #dc3545);
    display: none;
}

.signup-field.has-error .input,
.signup-field.has-error .select {
    border-color: var(--danger, #dc3545);
    outline: 2px solid color-mix(in oklch, var(--danger, #dc3545) 14%, transparent);
}

.signup-field.has-error .field-error {
    display: block;
}

.date-parts.has-error .input {
    border-color: var(--danger, #dc3545);
    outline: 2px solid color-mix(in oklch, var(--danger, #dc3545) 14%, transparent);
}

/* Select wrapper for custom arrow */
.select-wrapper {
    position: relative;
}

.select-wrapper .select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b6964' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* Signature pad */
.signature-wrapper {
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    position: relative;
    width: 100%;
    height: 200px;
}

.signature-wrapper canvas {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}

/* Contract preview container */
.contract-preview {
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    padding: 20px;
    height: 420px;
    overflow-y: auto;
    font-size: 14px;
    line-height: 1.55;
}

/* Step nav buttons */
.step-nav {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.step-nav .btn {
    flex: 1;
}

/* Back link */
.back-link {
    display: block;
    text-align: center;
    margin-top: 12px;
    font-size: 13px;
    color: var(--muted);
    cursor: pointer;
    transition: color 0.15s ease;
}

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

/* Auth container (signup) */
.signup-auth {
    max-width: 520px;
    margin: 80px auto;
    padding-inline: 32px;
}

/* Error banner */
.signup-error {
    border-color: var(--danger, #dc3545);
    background: color-mix(in oklch, var(--danger, #dc3545) 8%, var(--surface));
    color: var(--danger, #dc3545);
    border-radius: 10px;
    padding: 12px 16px;
    font-size: 14px;
    margin-bottom: 16px;
}

.signup-error:empty {
    display: none;
}

/* Loading spinner */
.signup-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 40px 0;
    color: var(--muted);
    font-size: 14px;
}

/* Step indicator */
.step-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 24px;
    padding: 0 16px;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    position: relative;
}

.step-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    border: 2px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    transition: all 0.2s ease;
}

.step-item.active .step-dot {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
}

.step-item.completed .step-dot {
    border-color: var(--success, #198754);
    background: var(--success, #198754);
    color: #fff;
}

.step-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--muted);
    white-space: nowrap;
    transition: color 0.2s ease;
}

.step-item.active .step-label {
    color: var(--accent);
    font-weight: 600;
}

.step-item.completed .step-label {
    color: var(--success, #198754);
}

.step-line {
    flex: 1;
    height: 2px;
    background: var(--border);
    min-width: 40px;
    max-width: 80px;
    margin: 0 4px;
    margin-bottom: 18px;
    transition: background 0.2s ease;
}

.step-line.completed {
    background: var(--success, #198754);
}

/* Responsive adjustments */
@media (max-width: 640px) {
    .date-parts {
        grid-template-columns: 1fr 1fr 1fr;
    }

    .step-nav {
        flex-direction: column;
    }

    .step-indicator {
        padding: 0;
    }

    .step-label {
        font-size: 11px;
    }

    .step-dot {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .step-line {
        min-width: 24px;
    }
}