/* CRYPTOBRO Mini App - Clean Mobile Design */

:root {
    --bg-color: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #e5e5e5;
    --card-bg: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --accent-red: #2080f2;
    --impact-high: #ff3b30;
    --impact-medium: #ff9500;
    --impact-low: #8e8e93;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background-color: #f5f5f5;
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 80px; /* Space for bottom tabs */
}

/* Remove old header - we'll use bottom tabs */
.header {
    display: none;
}

/* Bottom Navigation */
.tabs {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    background: white;
    border-top: 1px solid var(--border-color);
    padding: 8px 0;
    z-index: 1000;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
}

.tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 4px;
    background: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-icon {
    font-size: 24px;
    line-height: 1;
}

.tab-text {
    font-size: 11px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.tab.active .tab-text {
    color: var(--accent-red);
}

/* Hide search container by default */
.search-container {
    display: none;
    padding: 16px;
    background: white;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    gap: 8px;
    flex-direction: row;
}

.search-container.show {
    display: flex;
}

.search-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    background: #f5f5f5;
}

.search-input:focus {
    outline: none;
    background: white;
    border-color: var(--accent-red);
}

.search-btn {
    padding: 12px 20px;
    background: var(--accent-red);
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.search-btn:active {
    transform: scale(0.95);
    background: #d02820;
}

/* Content containers */
.tab-content {
    display: none;
    padding: 16px;
    min-height: calc(100vh - 80px);
}

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

/* View containers */
.view {
    max-width: 100%;
}

.view.hidden {
    display: none;
}

/* Loading & Empty states */
.loading, .empty-state, .error {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    font-size: 15px;
}

.error {
    color: #ff3b30;
}

/* ==================== GLOSSARY STYLES ==================== */

.glossary-header {
    background: white;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.glossary-header-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.glossary-header-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.alphabet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
    gap: 10px;
    margin-bottom: 24px;
    padding: 4px;
}

.letter-btn {
    padding: 14px 8px;
    background: linear-gradient(135deg, #ffffff 0%, #f8f8f8 100%);
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
    transition: all 0.2s;
}

.letter-btn:active {
    background: linear-gradient(135deg, #2080f2 0%, #ff5a50 100%);
    color: white;
    border-color: #2080f2;
    transform: scale(0.95);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.letter-btn.disabled {
    color: var(--text-tertiary);
    opacity: 0.3;
    cursor: default;
    background: #fafafa;
    border-color: #f0f0f0;
}

.letter-btn.disabled:active {
    transform: none;
    background: #fafafa;
    color: var(--text-tertiary);
    border-color: #f0f0f0;
}

/* Letter Card (AIBRO style with counters) */
.letter-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f8f8 100%);
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 8px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60px;
}

.letter-card:active {
    background: linear-gradient(135deg, #2080f2 0%, #ff5a50 100%);
    border-color: #2080f2;
    transform: scale(0.95);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.letter-card:active .letter {
    color: white;
}

.letter-card:active .letter-count {
    color: rgba(255, 255, 255, 0.9);
}

.letter-card.disabled {
    opacity: 0.3;
    cursor: default;
    background: #fafafa;
    border-color: #f0f0f0;
}

.letter-card.disabled:active {
    transform: none;
    background: #fafafa;
    border-color: #f0f0f0;
}

.letter-card.disabled:active .letter {
    color: var(--text-tertiary);
}

.letter-card.disabled:active .letter-count {
    color: var(--text-tertiary);
}

.letter {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 4px;
}

.letter-card.disabled .letter {
    color: var(--text-tertiary);
}

.letter-count {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1;
}

.letter-card.disabled .letter-count {
    color: var(--text-tertiary);
}

.term-card {
    background: white;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

.term-card:nth-child(odd) {
    background: #fafafa;
}

.term-card:active {
    box-shadow: var(--shadow-md);
}

.term-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.term-name-en {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.term-definition {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    color: var(--text-primary);
    cursor: pointer;
    margin-bottom: 16px;
}

.back-btn:active {
    background: #f5f5f5;
}

.term-detail {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.term-detail h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.term-detail-en {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.term-detail-definition {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.term-detail-article {
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.7;
}

.term-detail-article p {
    margin-bottom: 16px;
}

.term-link {
    color: #2481cc;
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid #2481cc;
}

/* ==================== LESSONS STYLES ==================== */

/* Lessons Category (AIBRO style) */
.lessons-category {
    margin-bottom: 32px;
}

.lessons-category .category-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-left: 12px;
    border-left: 4px solid var(--accent-red);
}

.lesson-card {
    background: white;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

.lesson-card:nth-child(odd) {
    background: #fafafa;
}

.lesson-card:active {
    box-shadow: var(--shadow-md);
}

/* Пара урок + практика в одном боксе */
.lesson-pair-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid transparent;
    transition: all 0.2s;
}

.lesson-pair-card:active {
    box-shadow: var(--shadow-md);
}

.lesson-pair-card.completed {
    background: #f0fdf4;
    border-left-color: #22c55e;
}

/* Заголовок пары (лекция/практика) */
.lesson-pair-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.lesson-type-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-red);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lesson-type-label.practice {
    color: #2ecc71;
}

/* Основной заголовок урока */
.lesson-title-main {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
}

/* Подзаголовок практики */
.lesson-title-sub {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

/* Разделитель между лекцией и практикой */
.practice-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, #e5e5e5, transparent);
    margin: 16px 0;
}

/* Секция практики внутри пары */
.lesson-practice {
    margin-top: 12px;
    padding-top: 12px;
}

/* Чекбокс урока */
.lesson-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent-red);
    flex-shrink: 0;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: white;
    position: relative;
    margin: 0;
}

.lesson-checkbox:checked {
    background-color: var(--accent-red);
    border-color: var(--accent-red);
}

.lesson-checkbox:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.lesson-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.lesson-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-red);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex: 1;
    margin-bottom: 4px;
}

.lesson-subtitle {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.4;
}

.lesson-difficulty {
    font-size: 14px;
    flex-shrink: 0;
}

.lesson-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.lesson-meta {
    display: flex;
    gap: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.lesson-detail {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.lesson-header {
    margin-bottom: 24px;
}

.lesson-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.3;
}

.lesson-content {
    font-size: 16px;
    color: var(--text-primary);
    line-height: 1.7;
}

.lesson-content h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 24px 0 12px;
}

.lesson-content h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 20px 0 10px;
}

.lesson-content p {
    font-size: 16px;
    margin-bottom: 16px;
}

.lesson-content ul, .lesson-content ol {
    margin: 12px 0 16px 20px;
}

.lesson-content li {
    font-size: 16px;
    margin-bottom: 8px;
}

.lesson-content code {
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
    font-family: 'SF Mono', Monaco, monospace;
}

.lesson-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.lesson-content em {
    font-style: italic;
    color: var(--text-secondary);
}

/* Tables in lessons */
.lesson-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 14px;
    overflow-x: auto;
    display: block;
}

.lesson-content table thead {
    background: var(--bg-secondary);
}

.lesson-content table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    border: 1px solid #ddd;
    color: var(--text-primary);
}

.lesson-content table td {
    padding: 10px 12px;
    border: 1px solid #ddd;
    color: var(--text-primary);
}

.lesson-content table tr:nth-child(even) {
    background: var(--bg-secondary);
}

/* Horizontal lines */
.lesson-content hr {
    border: none;
    border-top: 1px solid #ddd;
    margin: 24px 0;
}

/* Task checkboxes */
.lesson-content .task-item {
    list-style: none;
    margin-left: -20px;
}

.lesson-content .task-checkbox {
    margin-right: 8px;
    cursor: pointer;
    width: 18px;
    height: 18px;
    vertical-align: middle;
}

/* Code blocks */
.lesson-content pre {
    background: #f5f5f5;
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 16px 0;
}

.lesson-content pre code {
    background: none;
    padding: 0;
}

/* External links */
.lesson-content .external-link {
    color: var(--accent-red);
    text-decoration: underline;
    font-weight: 500;
    cursor: pointer;
}

.lesson-content .external-link:hover {
    color: #c41e3a;
}

/* ==================== COURSES STYLES ==================== */

.courses-header {
    text-align: center;
    margin-bottom: 24px;
}

.header-with-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.header-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.courses-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

.courses-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

.courses-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.course-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.course-card:active {
    transform: scale(0.98);
    box-shadow: var(--shadow-md);
}

.course-badge {
    font-size: 48px;
    text-align: center;
    margin-bottom: 12px;
}

.course-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    text-align: center;
}

.course-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    text-align: center;
}

.course-stats {
    display: flex;
    justify-content: space-around;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.course-stats span {
    background: #f5f5f5;
    padding: 6px 12px;
    border-radius: 8px;
}

.course-stats-secondary {
    display: flex;
    justify-content: center;
    margin-bottom: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.course-stats-secondary span {
    background: #e8f5e9;
    color: #2e7d32;
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 500;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #2080f2 0%, #ff5a50 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.course-status {
    text-align: center;
    font-size: 13px;
    color: var(--text-tertiary);
    font-style: italic;
    padding: 8px 0;
}

/* Course Detail Header */
.course-detail-header {
    text-align: center;
    margin-bottom: 32px;
    padding: 20px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.course-badge-large {
    font-size: 64px;
    margin-bottom: 12px;
}

.course-detail-header h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.course-detail-header p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Lesson Completion Mark */
.completion-mark {
    font-size: 16px;
    margin-left: 8px;
}

.lesson-card.completed {
    background: #f0fdf4;
    border-left: 4px solid #22c55e;
}

/* Lesson Tasks Section */
.lesson-tasks {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 2px solid var(--border-color);
}

.lesson-tasks h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.task-item {
    background: #f8f8f8;
    border-radius: 12px;
    padding: 14px 16px;
    transition: all 0.2s;
}

.task-item:has(input:checked) {
    background: #f0fdf4;
    border-left: 4px solid #22c55e;
}

.task-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    user-select: none;
}

.task-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    cursor: pointer;
    accent-color: var(--accent-red);
    flex-shrink: 0;
}

.task-text {
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.6;
}

.task-checkbox input[type="checkbox"]:checked + .task-text {
    color: var(--text-secondary);
    text-decoration: line-through;
}

/* Lesson Detail Header */
.lesson-detail-header {
    margin-bottom: 24px;
}

.lesson-type-header {
    font-size: 15px; /* Увеличено с 14px */
    font-weight: 700; /* Увеличен вес */
    color: var(--accent-red);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px; /* Увеличен отступ */
    padding-bottom: 10px; /* Увеличен отступ */
    border-bottom: 2px solid var(--accent-red);
}

.lesson-detail-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    margin-top: 16px;
}

.lesson-short-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.lesson-category {
    background: var(--accent-red);
    color: white;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

/* Responsive */
/* Адаптивность для мобильных (Telegram на телефоне) */
@media (max-width: 480px) {
    .tab-content {
        padding: 12px;
    }

    .calendar-event {
        padding: 12px;
    }

    .term-card, .lesson-card {
        padding: 14px;
    }

    .course-card {
        padding: 16px;
    }

    .course-badge {
        font-size: 40px;
    }

    .course-badge-large {
        font-size: 56px;
    }
}