/* ============================================
   Main Styles - Mobile-First Design
   ============================================ */

:root {
    /* Colors - Purple/Pink Theme */
    --primary-gradient-start: #8B5CF6;
    --primary-gradient-end: #EC4899;
    --primary-color: #8B5CF6;
    --secondary-color: #EC4899;
    --background: #F9FAFB;
    --surface: #FFFFFF;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--background);
    overflow-x: hidden;
    /* Prevent pull-to-refresh on mobile */
    overscroll-behavior-y: contain;
    /* Safe area for notched devices */
    padding-bottom: env(safe-area-inset-bottom);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-2xl);
}

h2 {
    font-size: var(--font-size-xl);
}

h3 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-gradient-end);
}

/* App Container */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100vw;
}

/* Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: linear-gradient(135deg, var(--primary-gradient-start) 0%, var(--primary-gradient-end) 100%);
    color: white;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.header-content {
    max-width: 100%;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.time {
    font-size: var(--font-size-sm);
    font-weight: 500;
    opacity: 0.9;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.icon-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: var(--radius-full);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: background var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.icon-btn:active {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0.95);
}

.points-badge {
    background: rgba(255, 255, 255, 0.25);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.header-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
}

/* Search Container */
.search-container {
    padding: var(--spacing-md);
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
}

.search-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--background);
    border-radius: var(--radius-xl);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
}

.search-icon {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    outline: none;
}

.search-input::placeholder {
    color: var(--text-light);
}

.search-close {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    -webkit-tap-highlight-color: transparent;
}

/* Main Content */
.app-main {
    flex: 1;
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-md) + 80px); /* Space for bottom nav */
    max-width: 100%;
    overflow-x: hidden;
}

.page {
    animation: fadeIn 0.3s ease;
}

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

/* Welcome Banner */
.welcome-banner {
    background: linear-gradient(135deg, var(--primary-gradient-start) 0%, var(--primary-gradient-end) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    color: white;
    box-shadow: var(--shadow-lg);
}

.banner-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.banner-icon {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.banner-text {
    flex: 1;
}

.banner-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.banner-subtitle {
    font-size: var(--font-size-base);
    font-weight: 500;
}

.banner-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-xs);
}

.banner-time {
    font-size: var(--font-size-xs);
    opacity: 0.8;
}

.banner-points {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.progress-fill {
    height: 100%;
    background: white;
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.activity-icons {
    display: flex;
    gap: var(--spacing-lg);
}

.activity-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.activity-number {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.activity-label {
    font-size: var(--font-size-xs);
    opacity: 0.8;
    text-transform: lowercase;
}

/* Summary Grid */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.summary-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.summary-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.summary-amount {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.summary-period {
    font-size: var(--font-size-xs);
    color: var(--text-light);
}

/* Section Styles */
.section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.see-more {
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    font-weight: 500;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom));
    z-index: var(--z-fixed);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    flex: 1;
    font-size: var(--font-size-xs);
}

.nav-item svg {
    transition: transform var(--transition-fast);
}

.nav-item:active svg {
    transform: scale(0.9);
}

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

.nav-item span {
    font-weight: 500;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    backdrop-filter: blur(4px);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Responsive - Tablet & Desktop */
@media (min-width: 768px) {
    body {
        max-width: 480px;
        margin: 0 auto;
        box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    }
    
    .app-header {
        border-radius: 0;
    }
    
    .bottom-nav {
        border-radius: 0;
    }
}

@media (min-width: 1024px) {
    :root {
        --spacing-md: 1.25rem;
        --spacing-lg: 2rem;
        --spacing-xl: 2.5rem;
    }
    
    .summary-grid {
        gap: var(--spacing-md);
    }
}

/* Touch Feedback */
@media (hover: none) and (pointer: coarse) {
    .icon-btn:active,
    .nav-item:active {
        transform: scale(0.95);
    }
}

/* Print Styles */
@media print {
    .app-header,
    .bottom-nav,
    .loading-overlay {
        display: none;
    }
    
    .app-main {
        padding-bottom: var(--spacing-md);
    }
}