:root {
    --bg-primary: #0f1419;
    --bg-secondary: #1a2332;
    --bg-card: #232d3d;
    --bg-input: #2a3548;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-muted: rgba(59, 130, 246, 0.15);
    --success: #22c55e;
    --success-muted: rgba(34, 197, 94, 0.15);
    --warning: #f59e0b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --font-sans: 'IBM Plex Sans', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    color-scheme: dark;
}

.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--accent);
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.org-name {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.nav {
    display: flex;
    gap: 0.25rem;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.nav-btn:hover {
    color: var(--text-primary);
    background: var(--bg-input);
}

.nav-btn.active {
    color: var(--accent);
    background: var(--accent-muted);
}

.header-auth {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-auth .user-name {
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.header-auth .user-name:hover {
    color: var(--accent);
}

.btn-header {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    border-radius: var(--radius);
    font-family: inherit;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-secondary);
}

.btn-header:hover {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.btn-logout {
    white-space: nowrap;
}

.btn-logout-cabinet {
    margin-top: 1rem;
    width: 100%;
    max-width: 200px;
}

/* Main */
.main {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

.section {
    display: none;
    animation: fadeIn 0.3s ease;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.moderator-notice {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.4);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.tab-btn.active {
    background: var(--accent-muted);
    color: var(--accent);
    border-color: var(--accent);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Form */
.diploma-form {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* Выпадающий список — тёмная тема, без белого мигания при клике */
.form-group select,
.select-role {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem 2.25rem 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.5L6 8L9.5 4.5' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    transition: border-color 0.2s;
}
.form-group select:hover,
.select-role:hover {
    border-color: var(--text-muted);
}
.form-group select:focus,
.select-role:focus {
    outline: none;
    border-color: var(--accent);
    background-color: var(--bg-input);
    color: var(--text-primary);
}
.form-group select:active,
.select-role:active {
    background-color: var(--bg-input);
    color: var(--text-primary);
}
.form-group select option,
.select-role option {
    background: var(--bg-card);
    color: var(--text-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.privacy-notice {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--accent-muted);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.notice-icon {
    font-size: 1.25rem;
}

.form-actions {
    margin-top: 1.5rem;
}

.form-result {
    margin-top: 1.5rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
}

.form-result.success {
    background: var(--success-muted);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-result.error {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Buttons */
.btn {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

.btn-hint {
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.9;
}

/* File upload */
.file-upload-zone {
    background: var(--bg-card);
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.file-upload-zone:hover,
.file-upload-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-muted);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.upload-icon {
    font-size: 3rem;
    opacity: 0.7;
}

.upload-content p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.upload-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.upload-result {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--success-muted);
    border-radius: var(--radius);
    color: var(--success);
}

/* Verification */
.verification-flow {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.verification-step {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border);
}

.verification-step h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.step-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.input-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.input-group input {
    flex: 1;
    min-width: 200px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.95rem;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.diploma-card {
    background: var(--bg-input);
    border-radius: var(--radius);
    padding: 1.25rem;
    font-size: 0.9rem;
}

.diploma-card .row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.diploma-card .row:last-child {
    border-bottom: none;
}

.diploma-card .label {
    color: var(--text-muted);
}

.diploma-card .value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.verification-answer {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--radius);
    font-weight: 500;
}

.verification-answer.success {
    background: var(--success-muted);
    color: var(--success);
}

.verification-answer.error {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

/* Cabinet */
.cabinet-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.cabinet-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border);
}

.cabinet-card.full-width {
    grid-column: 1 / -1;
}

.cabinet-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.profile-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.profile-row:last-child {
    border-bottom: none;
}

.profile-row .label {
    color: var(--text-muted);
}

.stats {
    display: flex;
    gap: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.activity-log {
    max-height: 200px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-item .time {
    color: var(--text-muted);
    font-size: 0.8rem;
    min-width: 60px;
}

.activity-item .action {
    color: var(--text-secondary);
}

.activity-empty {
    color: var(--text-muted);
    padding: 2rem;
    text-align: center;
}

.cabinet-auth-block {
    max-width: 400px;
}

.auth-hint {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.auth-switcher {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.25rem;
}

.auth-switcher-btn {
    flex: 1;
    padding: 0.65rem 1.25rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    transition: background 0.2s, color 0.2s;
}

.auth-switcher-btn:hover {
    color: var(--text-primary);
}

.auth-switcher-btn.active {
    background: var(--accent);
    color: white;
}

.cabinet-auth-block .auth-panel {
    display: none !important;
}

.cabinet-auth-block .auth-panel.active {
    display: block !important;
}

.auth-card {
    padding: 1.5rem 1.75rem;
    border: 1px solid var(--border);
}

.auth-switch {
    margin-top: 1.25rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.auth-switch-btn {
    display: inline-block;
    background: var(--bg-input);
    border: 1px solid var(--accent);
    color: var(--accent);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius);
    margin-left: 0.25rem;
    transition: background 0.2s, color 0.2s;
}

.auth-switch-btn:hover {
    background: var(--accent-muted);
    color: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* Скрытый нативный select (значение подставляется из кастомного списка) */
.role-select-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

/* Кастомный выпадающий список роли — без белого мигания */
.custom-select {
    position: relative;
    width: 100%;
}

.custom-select-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    cursor: pointer;
    text-align: left;
}

.custom-select-trigger:hover {
    border-color: var(--text-muted);
}

.custom-select-trigger:focus,
.custom-select-trigger:active {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-input);
    color: var(--text-primary);
}

.custom-select-arrow {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.custom-select-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 0.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    z-index: 100;
    overflow: hidden;
}

.custom-select-dropdown.open {
    display: block;
}

.custom-select-option {
    padding: 0.65rem 1rem;
    color: var(--text-primary);
    cursor: pointer;
    background: var(--bg-card);
}

.custom-select-option:hover {
    background: var(--bg-input);
}

.auth-form .form-group {
    margin-bottom: 1rem;
}

.auth-form .btn {
    margin-top: 0.5rem;
}

/* Таблица пользователей (админ) */
.users-toolbar {
    margin-bottom: 1rem;
}
.users-table-wrap {
    overflow-x: auto;
}
.users-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.users-table th,
.users-table td {
    padding: 0.6rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.users-table th {
    color: var(--text-muted);
    font-weight: 500;
}
.users-table tbody tr:hover {
    background: var(--bg-input);
}
.users-empty {
    color: var(--text-muted);
    font-style: italic;
}
.users-actions {
    white-space: nowrap;
}
.users-actions .btn-small {
    margin-right: 0.5rem;
}
.users-self {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Чёрный список на странице модерации */
.blacklist-block {
    margin-bottom: 1.5rem;
}
.blacklist-form {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.75rem;
}
.blacklist-input {
    flex: 1;
    max-width: 280px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem 0.75rem;
    color: var(--text-primary);
    font-size: 0.95rem;
}
.blacklist-words {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.blacklist-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.25rem 0.5rem;
    font-size: 0.9rem;
}
.blacklist-tag-word {
    color: var(--text-primary);
}
.blacklist-tag-remove {
    padding: 0 0.25rem;
    min-width: 1.5em;
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
}
.blacklist-tag-remove:hover {
    color: #ef4444;
}
.moderation-table-title {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}
.rejected-reason {
    max-width: 280px;
    word-wrap: break-word;
    color: var(--text-secondary);
}

.diploma-number {
    font-family: var(--font-mono);
    font-size: 0.85em;
}
.btn-small {
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
}

/* Модальное окно редактирования пользователя */
.modal {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}
.modal.open {
    opacity: 1;
    visibility: visible;
}
.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    cursor: pointer;
}
.modal-content {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    max-width: 420px;
    width: 100%;
    box-shadow: var(--shadow);
}
.modal-content h3 {
    margin-bottom: 1rem;
}
.modal-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* Footer */
.footer {
    padding: 1rem 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
}

/* Hash display */
.hash-preview {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    word-break: break-all;
    margin-top: 0.5rem;
}

/* Toast уведомления */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 500;
    box-shadow: var(--shadow);
    z-index: 1000;
    max-width: 400px;
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity 0.3s, transform 0.3s;
    pointer-events: none;
}

.toast.visible {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background: var(--success);
    color: white;
}

.toast.error {
    background: #ef4444;
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }

    .nav {
        order: 3;
        width: 100%;
    }

    .cabinet-grid {
        grid-template-columns: 1fr;
    }

    .input-group {
        flex-direction: column;
    }

    .input-group input {
        min-width: 100%;
    }
}