/* Mobile-First CSS for EDA Tracker - iPhone 17 Pro optimized */
/* Fitness theme: Green and Orange palette */

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

:root {
    /* Fitness color palette */
    --primary-green: #4CAF50;
    --primary-green-dark: #388E3C;
    --accent-orange: #FFA726;
    --accent-orange-dark: #F57C00;
    --bg-light: #FAFAFA;
    --bg-white: #FFFFFF;
    --text-dark: #333333;
    --text-muted: #757575;
    --border-color: #E0E0E0;
    --error-color: #E53935;
    --success-color: #43A047;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* iPhone 17 Pro safe areas */
    --safe-area-top: env(safe-area-inset-top, 0);
    --safe-area-bottom: env(safe-area-inset-bottom, 0);
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-dark);
    background-color: var(--bg-light);
    padding-top: var(--safe-area-top);
    padding-bottom: calc(60px + var(--safe-area-bottom));
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 100%;
    padding: var(--spacing-md);
    padding-bottom: var(--spacing-xl);
}

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

h1 {
    font-size: 24px;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-green);
}

h2 {
    font-size: 20px;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

.text-muted {
    color: var(--text-muted);
    font-size: 14px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    min-height: 48px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}

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

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

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

.btn-secondary:hover,
.btn-secondary:active {
    background-color: var(--accent-orange-dark);
}

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

.btn-full {
    width: 100%;
}

.btn-small {
    padding: 8px 16px;
    min-height: 36px;
    font-size: 14px;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-dark);
}

input[type="text"],
input[type="password"],
input[type="number"],
select {
    width: 100%;
    padding: 12px;
    min-height: 48px;
    font-size: 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-white);
    color: var(--text-dark);
    -webkit-appearance: none;
    appearance: none;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-green);
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* Cards */
.card {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Product card */
.product-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.product-info {
    flex: 1;
}

.product-name {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: var(--spacing-xs);
}

.product-stats {
    font-size: 13px;
    color: var(--text-muted);
}

.product-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Log entry card */
.log-entry {
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
}

.log-entry:last-child {
    border-bottom: none;
}

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

.log-product-name {
    font-weight: 600;
    font-size: 16px;
    color: var(--text-dark);
}

.log-weight {
    font-size: 14px;
    color: var(--text-muted);
}

.log-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    font-size: 13px;
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
}

.stat-value {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
}

/* Totals card */
.totals-card {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
    color: var(--bg-white);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.totals-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.totals-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.total-item {
    text-align: center;
}

.total-label {
    display: block;
    font-size: 13px;
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.total-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    background-color: var(--bg-white);
    border-top: 1px solid var(--border-color);
    padding-bottom: var(--safe-area-bottom);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    min-height: 60px;
    text-decoration: none;
    color: var(--text-muted);
    transition: color 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}

.nav-item:active {
    background-color: var(--bg-light);
}

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

.nav-icon {
    font-size: 24px;
    margin-bottom: 2px;
}

.nav-label {
    font-size: 11px;
    font-weight: 500;
}

/* Login page */
.login-container {
    max-width: 360px;
    margin: 60px auto;
    padding: var(--spacing-md);
}

.login-card {
    background-color: var(--bg-white);
    border-radius: 16px;
    padding: var(--spacing-xl);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.login-title {
    text-align: center;
    font-size: 28px;
    color: var(--primary-green);
    margin-bottom: var(--spacing-xl);
}

.error-message {
    background-color: #FFEBEE;
    color: var(--error-color);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    font-size: 14px;
}

.success-message {
    background-color: #E8F5E9;
    color: var(--success-color);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    font-size: 14px;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

/* Action buttons row */
.btn-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.btn-group .btn {
    flex: 1;
}

/* Table */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
}

.table tbody tr:hover {
    background-color: var(--bg-light);
}

/* Desktop responsiveness */
@media (min-width: 768px) {
    .container {
        max-width: 768px;
        margin: 0 auto;
    }
    
    .login-container {
        max-width: 480px;
    }
    
    .totals-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 960px;
    }
    
    body {
        padding-bottom: 0;
    }
    
    .bottom-nav {
        position: relative;
        box-shadow: none;
        border-top: none;
        border-bottom: 1px solid var(--border-color);
        margin-bottom: var(--spacing-lg);
    }
}

/* Utility classes */
.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

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

.hidden {
    display: none;
}