/**
 * AntiSchool WebApp - Main Styles
 * Mobile-first дизайн для Telegram WebApp
 * 
 * Основний колір: #1B5BF7
 * Шрифт: Montserrat
 */

/* ============================================================
   ІМПОРТИ ТА ЗМІННІ
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&display=swap');

:root {
    /* Кольори */
    --primary-color: #1B5BF7;
    --primary-dark: #1449D6;
    --primary-light: #4A7BF8;
    --secondary-color: #6C757D;
    --success-color: #28A745;
    --danger-color: #DC3545;
    --warning-color: #FFC107;
    --info-color: #17A2B8;
    
    /* Нейтральні кольори */
    --white: #FFFFFF;
    --black: #000000;
    --gray-100: #F8F9FA;
    --gray-200: #E9ECEF;
    --gray-300: #DEE2E6;
    --gray-400: #CED4DA;
    --gray-500: #ADB5BD;
    --gray-600: #6C757D;
    --gray-700: #495057;
    --gray-800: #343A40;
    --gray-900: #212529;
    
    /* Шрифти */
    --font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Розміри */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    
    /* Тіні */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    
    /* Переходи */
    --transition: all 0.3s ease;
}

/* ============================================================
   БАЗОВІ СТИЛІ
   ============================================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--gray-900);
    background-color: var(--gray-100);
    overflow-x: hidden;
}

/* ============================================================
   ТИПОГРАФІЯ
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

.brand {
    color: var(--primary-color);
    font-weight: 700;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: var(--gray-600); }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }

/* ============================================================
   КНОПКИ
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

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

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

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

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

.btn-ghost {
    background-color: transparent;
    color: var(--gray-700);
}

.btn-ghost:hover {
    background-color: var(--gray-200);
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

/* ============================================================
   ФОРМИ
   ============================================================ */

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.form-control,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="date"],
input[type="time"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--gray-900);
    background-color: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.form-control:focus,
input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(27, 91, 247, 0.1);
}

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

small {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

/* ============================================================
   ХЕДЕР
   ============================================================ */

.dashboard-header {
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

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

.dashboard-header h1 {
    font-size: 1.25rem;
    margin: 0;
}

/* ============================================================
   НАВІГАЦІЯ ПО ТАБАМ
   ============================================================ */

.tab-navigation {
    display: flex;
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 1rem 0.5rem;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    background-color: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    min-width: 80px;
}

.tab-btn i {
    font-size: 1.25rem;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-btn:hover {
    background-color: var(--gray-100);
}

/* ============================================================
   КОНТЕНТ ТАБІВ
   ============================================================ */

.dashboard-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.tab-content {
    display: none;
}

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

/* ============================================================
   КАРТКИ
   ============================================================ */

.card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.card-body {
    margin-bottom: 1rem;
}

.card-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

/* ============================================================
   ПОДІЇ
   ============================================================ */

.event-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
}

.event-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.event-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.event-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.event-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 20px;
    text-transform: uppercase;
}

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

.badge-level {
    background-color: var(--primary-color);
    color: var(--white);
}

.event-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.event-description {
    color: var(--gray-700);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.event-description.collapsed {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.event-teacher {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.teacher-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
}

.teacher-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.teacher-info {
    flex: 1;
}

.teacher-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.teacher-specialization {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* ============================================================
   ФІЛЬТРИ
   ============================================================ */

.filters-container {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

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

/* ============================================================
   КАЛЕНДАР
   ============================================================ */

.calendar-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    background-color: var(--white);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.calendar-day:hover {
    background-color: var(--gray-100);
}

.calendar-day.active {
    background-color: var(--primary-color);
    color: var(--white);
}

.calendar-day.has-events {
    border: 2px solid var(--primary-color);
}

/* ============================================================
   УТИЛІТИ
   ============================================================ */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 2rem;
    color: var(--gray-600);
}

.link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.link:hover {
    text-decoration: underline;
}

/* ============================================================
   АДАПТИВНІСТЬ
   ============================================================ */

@media (min-width: 768px) {
    html {
        font-size: 18px;
    }
    
    .dashboard-header h1 {
        font-size: 1.5rem;
    }
    
    .tab-btn {
        flex-direction: row;
        gap: 0.5rem;
        padding: 1rem;
    }
}

@media (min-width: 1024px) {
    .dashboard-content {
        padding: 2rem;
    }
}