/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Child-friendly color palette */
    --primary-color: #FF6B6B;      /* Warm red */
    --secondary-color: #4ECDC4;    /* Turquoise */
    --accent-color: #45B7D1;       /* Sky blue */
    --success-color: #96CEB4;      /* Mint green */
    --warning-color: #FFEAA7;      /* Soft yellow */
    --danger-color: #DDA0DD;       /* Light purple */
    
    /* Background colors */
    --bg-primary: #F8F9FA;
    --bg-secondary: #FFFFFF;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Text colors */
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    --text-light: #FFFFFF;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== LAYOUT ===== */
.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-sm);
    gap: var(--spacing-md);
}

/* ===== HEADER ===== */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.header-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 44px;
    min-height: 44px;
}

.header-btn:hover {
    background: var(--primary-color);
    transform: scale(1.05);
}

/* ===== ADDRESS SECTION ===== */
.address-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.address-section.collapsed {
    transform: translateY(-100%);
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

.input-group {
    margin-bottom: var(--spacing-md);
}

.input-label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-size: 1rem;
}

.address-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid #E0E0E0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    min-height: 44px;
}

.address-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(69, 183, 209, 0.1);
}

.button-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
    min-width: 120px;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: #E55A5A;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: #3DB8B0;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-danger:hover {
    background: #C890C8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== PROGRESS SECTION ===== */
.progress-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.progress-section.compact {
    padding: var(--spacing-sm);
}

.progress-layout {
    display: flex;
    gap: var(--spacing-md);
    height: 100%;
}

.progress-column {
    flex: 2;
    display: contents;
    flex-direction: column;
    gap: var(--spacing-md);
}

.first-stats-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ===== PROGRESS BARS ===== */
.progress-container {
    background: #F8F9FA;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: 0.9rem;
}

.progress-label {
    color: var(--text-secondary);
}

.progress-bar {
    position: relative;
    height: 60px;
    background: #E0E0E0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.progress-track {
    position: relative;
    height: 100%;
    width: 100%;
}

.progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    border-radius: var(--radius-md);
    transition: width 0.5s ease;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--spacing-sm);
    min-width: 60px;
}

.progress-car {
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* ===== STATISTICS ===== */
.stat-item {
    background: #F8F9FA;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.stat-item.horizontal {
    flex: 1;
}

.stat-header {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-family: 'Courier New', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* ===== SECOND STATS ROW ===== */
.second-stats-row {
    display: inline-flex;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

/* ===== CONTROL SECTION ===== */
.control-section {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast-container {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 300px;
}

.toast {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-color);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-height: 44px;
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.info {
    border-left-color: var(--accent-color);
}

.toast-content {
    flex: 1;
    font-weight: 500;
}

.toast-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    min-width: 24px;
    min-height: 24px;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ===== UTILITY CLASSES ===== */
.hidden {
    display: none !important;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .app {
        padding: var(--spacing-xs);
        gap: var(--spacing-sm);
    }
    
    .title {
        font-size: 1.3rem;
    }
    
    .progress-layout {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .progress-column {
        order: 2;
    }
    
    .first-stats-column {
        order: 1;
        flex-direction: row;
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        flex: 1;
        padding: var(--spacing-sm);
    }
    
    .stat-value {
        font-size: 1.2rem;
    }
    
    .second-stats-row {
        gap: var(--spacing-sm);
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 400px) {
    .header {
        padding: var(--spacing-sm);
    }
    
    .title {
        font-size: 1.1rem;
    }
    
    .progress-bar {
        height: 50px;
    }
    
    .progress-car {
        font-size: 1.2rem;
    }
    
    .stat-value {
        font-size: 1rem;
    }
    
    .toast-container {
        left: var(--spacing-sm);
        right: var(--spacing-sm);
        max-width: none;
    }
}

@media (max-width: 400px) {
    .app {
        padding: 4px;
        gap: 6px;
        min-height: 100vh;
        max-height: 100vh;
        overflow: hidden;
    }
    
    .header {
        padding: var(--spacing-xs);
        margin-bottom: 4px;
    }
    
    .title {
        font-size: 0.9rem;
    }
    
    .address-section, .progress-section, .second-stats-row {
        border-radius: var(--radius-sm);
        padding: var(--spacing-xs);
        margin-bottom: 4px;
    }
    
    .input-group {
        margin-bottom: var(--spacing-xs);
    }
    
    .input-label {
        font-size: 0.8rem;
        margin-bottom: 2px;
    }
    
    .address-input {
        padding: var(--spacing-xs);
        font-size: 0.9rem;
        min-height: 36px;
    }
    
    .btn {
        padding: var(--spacing-xs);
        font-size: 0.8rem;
        min-height: 36px;
        min-width: 80px;
    }
    
    .progress-layout {
        gap: var(--spacing-xs);
    }
    
    .progress-container {
        padding: var(--spacing-xs);
    }
    
    .progress-bar {
        height: 40px;
    }
    
    .progress-car {
        font-size: 1rem;
    }
    
    .stat-item {
        padding: var(--spacing-xs);
    }
    
    .stat-header {
        font-size: 0.7rem;
    }
    
    .stat-value {
        font-size: 1rem;
    }
    
    .progress-labels {
        font-size: 0.7rem;
        margin-bottom: var(--spacing-xs);
    }
}

@media (max-width: 350px) {
    .app {
        padding: 2px;
        gap: 4px;
    }
    
    .header {
        padding: 6px;
    }
    
    .title {
        font-size: 0.8rem;
    }
    
    .address-section, .progress-section, .second-stats-row {
        padding: 6px;
    }
    
    .btn {
        padding: 6px 8px;
        font-size: 0.7rem;
        min-width: 60px;
    }
    
    .stat-value {
        font-size: 0.9rem;
    }
}

@media (orientation: landscape) and (max-height: 500px) {
    .app {
        gap: var(--spacing-xs);
    }
    
    .header {
        padding: var(--spacing-xs) var(--spacing-sm);
        margin-bottom: var(--spacing-xs);
    }
    
    .title {
        font-size: 1.1rem;
    }
    
    .progress-section {
        padding: var(--spacing-sm);
    }
    
    .progress-layout {
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .stat-value {
        font-size: 1.1rem;
    }
}

/* ===== SAFARI VIEWPORT FIX ===== */
@supports (-webkit-touch-callout: none) {
    .app {
        min-height: -webkit-fill-available;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .progress-car {
        animation: none;
    }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.address-input:focus,
.header-btn:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --text-primary: #000000;
        --bg-secondary: #FFFFFF;
    }
    
    .progress-fill {
        background: var(--primary-color);
    }
}