:root {
    --bg: #f8f9fc;
    --card-bg: #ffffff;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --text: #1e1e2e;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border: #e5e7eb;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --draft-bg: #fef3c7;
    --draft-text: #92400e;
    --submitted-bg: #d1fae5;
    --submitted-text: #065f46;
    --pending-bg: #e0e7ff;
    --pending-text: #3730a3;
    --expired-bg: #fee2e2;
    --expired-text: #991b1b;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.portal-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 16px;
}

.portal-header {
    text-align: center;
    padding: 40px 0 24px;
}
.portal-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}
.portal-header p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow: hidden;
}
.card + .card { margin-top: 16px; }

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.card-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
}
.card-body { padding: 20px; }

/* Login Page */
.login-card {
    max-width: 420px;
    margin: 60px auto;
}
.login-card .card-body { padding: 32px; }
.login-title {
    font-size: 1.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}
.login-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 28px;
}

.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.92rem;
    color: var(--text);
    background: var(--card-bg);
    transition: border-color 0.15s;
    outline: none;
}
.form-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.12); }
.form-input::placeholder { color: var(--text-muted); }

.otp-input {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 8px;
    font-family: 'Courier New', monospace;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    width: 100%;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
    background: var(--bg);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: #eee; }

.btn-sm { padding: 6px 14px; font-size: 0.82rem; }
.btn-full { width: 100%; }

/* Status Badges */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.badge-pending { background: var(--pending-bg); color: var(--pending-text); }
.badge-draft { background: var(--draft-bg); color: var(--draft-text); }
.badge-submitted { background: var(--submitted-bg); color: var(--submitted-text); }
.badge-expired { background: var(--expired-bg); color: var(--expired-text); }

/* Dashboard Assignments */
.source-group { margin-bottom: 20px; }
.source-group-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text);
    padding: 8px 0;
    border-bottom: 2px solid var(--primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.source-count {
    background: var(--bg);
    color: var(--text-muted);
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: 12px;
}

.assignment-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    transition: background 0.1s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}
.assignment-item:hover { background: #f9fafb; }
.assignment-item:last-child { border-bottom: none; }

.assignment-info {
    flex: 1;
}
.assignment-reviewee {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
}
.assignment-form-name {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}
.assignment-right {
    display: flex;
    align-items: center;
    gap: 8px;
}
.assignment-arrow {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Form Page Hero Header */
.form-page-hero {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border-radius: var(--radius);
    padding: 28px 28px 24px;
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 18px;
    box-shadow: 0 4px 16px rgba(30,41,59,0.18);
}
.form-hero-icon {
    background: rgba(255,255,255,0.12);
    border-radius: 10px;
    padding: 12px;
    color: #94a3b8;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.form-hero-content { flex: 1; min-width: 0; }
.form-hero-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #f1f5f9;
    margin-bottom: 12px;
    line-height: 1.3;
}
.form-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.form-hero-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 20px;
    padding: 5px 14px;
    font-size: 0.82rem;
    color: #cbd5e1;
}
.form-hero-chip strong { color: #f1f5f9; font-weight: 600; }
.form-hero-chip svg { opacity: 0.7; flex-shrink: 0; }

.form-field-group {
    margin-bottom: 20px;
}
.form-field-label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.form-field-label .required { color: var(--danger); }

.form-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text);
    background: var(--card-bg);
    resize: vertical;
    min-height: 80px;
    outline: none;
    font-family: inherit;
}
.form-textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.12); }

.form-select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text);
    background: var(--card-bg);
    outline: none;
}
.form-select:focus { border-color: var(--primary); }

.rating-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.rating-option {
    padding: 8px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 500;
    transition: all 0.15s;
    text-align: center;
    min-width: 44px;
}
.rating-option:hover { border-color: var(--primary); }
.rating-option.selected {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

.checkbox-group, .radio-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.check-option, .radio-option {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    cursor: pointer;
}
.check-option input, .radio-option input { accent-color: var(--primary); }

/* Form Actions */
.form-actions-bar {
    display: flex;
    gap: 12px;
    padding: 20px 0;
    border-top: 1px solid var(--border);
    margin-top: 20px;
}
.form-actions-bar .btn { flex: 1; }

.autosave-indicator {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    padding: 8px 0;
}
.autosave-indicator.saving { color: var(--warning); }
.autosave-indicator.saved { color: var(--success); }
.autosave-indicator.error { color: var(--danger); }

/* Session Timer */
.session-timer {
    position: fixed;
    top: 12px;
    right: 12px;
    background: var(--card-bg);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    color: var(--text-muted);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 6px;
}
.session-timer.warning { color: var(--warning); border-color: var(--warning); }
.session-timer.danger { color: var(--danger); border-color: var(--danger); }

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    margin-bottom: 16px;
}
.back-link:hover { text-decoration: underline; }

/* Toast */
.portal-toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 500;
    color: #fff;
    z-index: 1000;
    animation: toastIn 0.3s ease;
    box-shadow: var(--shadow-lg);
}
.portal-toast.success { background: var(--success); }
.portal-toast.error { background: var(--danger); }
.portal-toast.warning { background: var(--warning); color: var(--text); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Confirm Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 500;
}
.modal-overlay.active { display: flex; }
.modal-box {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 90%;
    padding: 28px;
    text-align: center;
}
.modal-box h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.modal-box p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    margin-bottom: 24px;
}
.modal-actions {
    display: flex;
    gap: 10px;
}
.modal-actions .btn { flex: 1; }

/* Read-only overlay */
.form-readonly .form-input,
.form-readonly .form-textarea,
.form-readonly .form-select {
    background: #f3f4f6;
    pointer-events: none;
    opacity: 0.8;
}
.form-readonly .rating-option,
.form-readonly .check-option input,
.form-readonly .radio-option input {
    pointer-events: none;
}

.read-only-banner {
    background: var(--submitted-bg);
    color: var(--submitted-text);
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    display: none;
    align-items: center;
    justify-content: center;
}

.logout-btn {
    position: fixed;
    top: 12px;
    left: 12px;
    background: var(--card-bg);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    color: var(--text-muted);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    z-index: 100;
    cursor: pointer;
    text-decoration: none;
}
.logout-btn:hover { color: var(--danger); border-color: var(--danger); }

/* Section header */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.spinner-dark {
    border-color: rgba(0,0,0,0.1);
    border-top-color: var(--primary);
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .portal-container { padding: 12px 8px; }
    .login-card { margin: 24px auto; }
    .form-actions-bar { flex-direction: column; }
    .session-timer { font-size: 0.7rem; padding: 4px 10px; }
    .form-page-hero { flex-direction: column; gap: 12px; padding: 20px; }
    .form-hero-meta { flex-direction: column; gap: 6px; }
    .form-hero-title { font-size: 1.1rem; }
}