/**
 * Telegram Mini App - Estilos principais
 * Design mobile-first inspirado em apps financeiros
 */

:root {
    --primary: #6C5CE7;
    --primary-dark: #5A4BD1;
    --secondary: #00CEC9;
    --success: #00B894;
    --warning: #FDCB6E;
    --danger: #E17055;
    --bg: var(--tg-theme-bg-color, #F8F9FE);
    --text: var(--tg-theme-text-color, #2D3436);
    --hint: var(--tg-theme-hint-color, #636E72);
    --card-bg: var(--tg-theme-secondary-bg-color, #FFFFFF);
    --button: var(--tg-theme-button-color, #6C5CE7);
    --button-text: var(--tg-theme-button-text-color, #FFFFFF);
    --border-radius: 16px;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(108, 92, 231, 0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* App Container */
.app-container {
    max-width: 480px;
    margin: 0 auto;
    padding: 16px;
    padding-bottom: 80px;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0 20px;
}

.user-greeting {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.user-avatar-placeholder {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
}

.greeting-text h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.greeting-text p {
    font-size: 0.85rem;
    color: var(--hint);
}

/* Balance Card */
.balance-card {
    background: linear-gradient(135deg, var(--primary) 0%, #A29BFE 100%);
    border-radius: var(--border-radius);
    padding: 24px;
    color: white;
    margin-bottom: 20px;
    box-shadow: 0 8px 30px rgba(108, 92, 231, 0.3);
    position: relative;
    overflow: hidden;
    animation: slideUp 0.6s ease;
}

.balance-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 200px;
    height: 200px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.balance-label {
    font-size: 0.85rem;
    opacity: 0.9;
    margin-bottom: 4px;
}

.balance-value {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.balance-sub {
    font-size: 0.8rem;
    opacity: 0.8;
    margin-top: 8px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 16px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    animation: slideUp 0.6s ease backwards;
}

.stat-card:nth-child(2) { animation-delay: 0.1s; }

.stat-card:active {
    transform: scale(0.97);
}

.stat-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--hint);
    margin-top: 4px;
}

/* Section Title */
.section-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Task List */
.task-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.task-item {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 14px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    animation: slideUp 0.5s ease backwards;
}

.task-item:nth-child(2) { animation-delay: 0.1s; }
.task-item:nth-child(3) { animation-delay: 0.2s; }
.task-item:nth-child(4) { animation-delay: 0.3s; }

.task-item:active {
    transform: scale(0.98);
}

.task-item.completed {
    opacity: 0.6;
}

.task-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.task-icon.star { background: #FFF3E0; }
.task-icon.survey { background: #E8F5E9; }
.task-icon.article { background: #E3F2FD; }
.task-icon.video { background: #FCE4EC; }

.task-info {
    flex: 1;
    min-width: 0;
}

.task-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.task-desc {
    font-size: 0.8rem;
    color: var(--hint);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.task-reward {
    font-weight: 700;
    color: var(--success);
    font-size: 0.9rem;
    white-space: nowrap;
}

.task-check {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid #DFE6E9;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
}

.task-item.completed .task-check {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

/* Action Buttons */
.action-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 8px;
    background: var(--card-bg);
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text);
    text-decoration: none;
    font-size: 0.75rem;
}

.action-btn:active {
    transform: scale(0.95);
    background: #F1F2F6;
}

.action-btn .icon {
    font-size: 1.4rem;
}

/* Bottom Nav */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-top: 1px solid rgba(0,0,0,0.06);
    display: flex;
    justify-content: space-around;
    padding: 8px 0;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    z-index: 100;
    max-width: 480px;
    margin: 0 auto;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 16px;
    color: var(--hint);
    text-decoration: none;
    font-size: 0.7rem;
    transition: var(--transition);
    border: none;
    background: none;
    cursor: pointer;
}

.nav-item.active {
    color: var(--primary);
}

.nav-item .icon {
    font-size: 1.3rem;
}

/* Profile Page */
.profile-header {
    text-align: center;
    padding: 30px 0;
}

.profile-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary);
    margin-bottom: 12px;
}

.profile-name {
    font-size: 1.3rem;
    font-weight: 700;
}

.profile-username {
    color: var(--hint);
    font-size: 0.9rem;
}

.info-list {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

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

.info-label {
    color: var(--hint);
    font-size: 0.9rem;
}

.info-value {
    font-weight: 600;
    font-size: 0.9rem;
}

.premium-badge {
    background: linear-gradient(135deg, #FDCB6E, #E17055);
    color: white;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Toast Notification */
.toast-container {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    width: 90%;
    max-width: 400px;
}

.toast {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 14px 18px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: toastIn 0.4s ease;
    margin-bottom: 8px;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }

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

/* Error Page */
.error-page {
    text-align: center;
    padding: 60px 20px;
}

.error-page .icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.error-page h2 {
    margin-bottom: 8px;
}

.error-page p {
    color: var(--hint);
    margin-bottom: 20px;
}

/* Responsive */
@media (min-width: 481px) {
    .app-container {
        padding: 24px;
    }
}