/* NoBS Macro - Modern iOS-Style Nutrition Tracker */

:root {
    /* Gradient Colors */
    --gradient-start: #ff930f;
    --gradient-end: #ef709b;
    --primary-color: #ff930f;
    --primary-dark: #e6820d;
    
    /* Neutral Colors */
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --text-tertiary: #a1a1a6;
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-tertiary: #fafafa;
    --border-color: #e5e5ea;
    --border-light: #f2f2f7;
    
    /* Status Colors */
    --success-color: #34c759;
    --danger-color: #ff3b30;
    --warning-color: #ff9500;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Border Radius */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Safe Area */
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    height: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 17px;
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -0.022em;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    padding-top: var(--safe-area-top);
    padding-bottom: var(--safe-area-bottom);
}

/* Gradient Utility */
.gradient {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* View Management */
.view {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
}

.hidden {
    display: none !important;
}

.view.hidden {
    display: none;
}

.app-view {
    display: none;
    flex: 1;
    padding-bottom: calc(80px + var(--safe-area-bottom));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.app-view.active {
    display: block;
}

/* Login View */
.login-view {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
}

.login-container {
    max-width: 400px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
}

.login-logo {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.app-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.login-container h1 {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.login-container .form-group {
    margin-bottom: var(--spacing-lg);
}

.login-container .form-group label {
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
    margin-bottom: var(--spacing-sm);
}

.login-container .form-group input {
    background-color: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    font-size: 17px;
    box-shadow: var(--shadow);
}

.login-container .form-group input:focus {
    background-color: white;
    box-shadow: var(--shadow-md);
}

.login-container .btn-primary {
    background-color: white;
    color: var(--gradient-start);
    font-weight: 600;
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-md);
}

.login-container .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.login-container .error-message {
    background-color: rgba(255, 255, 255, 0.95);
    color: var(--danger-color);
    border-radius: var(--radius-sm);
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
}

.auth-tab {
    flex: 1;
    padding: var(--spacing-md);
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
    font-family: inherit;
}

.auth-tab.active {
    color: white;
    border-bottom-color: white;
}

.auth-tab:hover {
    color: rgba(255, 255, 255, 0.9);
}

/* Auth tabs in modal (light background) */
.modal .auth-tabs {
    border-bottom-color: var(--border-color);
}

.modal .auth-tab {
    color: var(--text-secondary);
}

.modal .auth-tab.active {
    color: var(--text-primary);
    border-bottom-color: var(--gradient-start);
}

.modal .auth-tab:hover {
    color: var(--text-primary);
}

.auth-form {
    width: 100%;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: 15px;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 17px;
    font-family: inherit;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    letter-spacing: -0.01em;
    -webkit-tap-highlight-color: transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover,
.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow);
}

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

.btn-danger:hover {
    background-color: #e6342a;
    box-shadow: var(--shadow-md);
}

.btn-large {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: 18px;
    margin: var(--spacing-md) 0;
    border-radius: var(--radius);
}

.btn-text {
    background: none;
    border: none;
    color: var(--gradient-start);
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    padding: var(--spacing-xs);
}

.btn-text:hover {
    opacity: 0.8;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.user-menu-btn:hover {
    background-color: var(--bg-secondary);
}

/* Error Messages */
.error-message {
    color: var(--danger-color);
    font-size: 15px;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: rgba(255, 59, 48, 0.1);
    border-radius: var(--radius-sm);
}

.error-message.hidden {
    display: none;
}

.message {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-md);
    font-size: 15px;
}

.message.success {
    background-color: rgba(52, 199, 89, 0.1);
    color: var(--success-color);
}

.message.error {
    background-color: rgba(255, 59, 48, 0.1);
    color: var(--danger-color);
}

.message.hidden {
    display: none;
}

/* View Header */
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background-color: rgba(255, 255, 255, 0.8);
}

.view-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-top: 0.5px solid var(--border-light);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0 calc(var(--spacing-sm) + var(--safe-area-bottom));
    z-index: 100;
    box-shadow: 0 -1px 10px rgba(0, 0, 0, 0.05);
}

.nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-xs);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
    font-size: 11px;
    font-weight: 500;
    -webkit-tap-highlight-color: transparent;
}

.nav-btn.active {
    color: var(--gradient-start);
}

.nav-icon {
    font-size: 22px;
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-icon-img {
    width: 22px;
    height: 22px;
    object-fit: contain;
    transition: filter 0.2s, opacity 0.2s;
}

/* Brand icon (Dashboard) - always shows original colors, larger size */
.nav-icon-brand {
    width: 40px;
    height: 40px;
    filter: none !important;
    opacity: 1 !important;
}

.nav-btn:not(.active) .nav-icon-img {
    filter: brightness(0) saturate(0%) invert(54%) sepia(0%) saturate(0%) hue-rotate(0deg) brightness(0.53) contrast(0.53);
    opacity: 0.6;
}

.nav-btn.active .nav-icon-img {
    filter: brightness(0) saturate(100%) invert(64%) sepia(95%) saturate(1352%) hue-rotate(1deg) brightness(102%) contrast(101%);
    opacity: 1;
}

/* Brand button - no label, centered icon */
.nav-btn-brand {
    flex: 1;
}

.nav-btn-brand .nav-label {
    display: none;
}

.nav-label {
    font-size: 10px;
    letter-spacing: 0.01em;
}

/* Date Selector */
.date-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
    margin: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.date-input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 17px;
    font-family: inherit;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 500;
}

.date-nav-btn {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-sm);
    background-color: var(--bg-secondary);
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.date-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.date-nav-btn:active:not(:disabled) {
    background-color: var(--border-color);
    transform: scale(0.95);
}

/* Calories Summary Card */
.calories-summary {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    color: white;
}

.calories-label {
    display: block;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.calories-value {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: white;
}

/* Macro Bars */
.macro-bars {
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

.macro-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.macro-progress-text {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 14px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-full);
}

.progress-fill.over {
    background: linear-gradient(90deg, var(--warning-color) 0%, #ff6b35 100%);
}

/* Food Log Section */
.food-log-section,
.weight-section {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.food-log-section h3,
.weight-section h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.food-log-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.food-log-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.food-log-item:active {
    background-color: var(--border-color);
    transform: scale(0.98);
}

.food-log-item-info {
    flex: 1;
}

.food-log-item-name {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.food-log-item-details {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.food-log-item-delete {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 20px;
    padding: var(--spacing-sm);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.food-log-item-delete:active {
    background-color: rgba(255, 59, 48, 0.1);
    transform: scale(0.9);
}

/* Weight Section */
.weight-display {
    padding: var(--spacing-lg);
    text-align: center;
}

.weight-value {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.weight-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.weight-input {
    flex: 1;
    min-width: 0; /* Prevents overflow */
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 17px;
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
}

.weight-form .btn {
    flex: 1;
    min-width: 0; /* Prevents overflow */
    white-space: nowrap;
}

/* Search */
.search-container {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-primary);
    border-bottom: 0.5px solid var(--border-light);
}

.search-input {
    width: 100%;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 17px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.search-input:focus {
    box-shadow: var(--shadow);
    background-color: white;
}

/* Foods List */
.top-foods-section,
.all-foods-section,
.onetime-foods-section {
    padding: var(--spacing-lg);
}

.top-foods-section h3,
.all-foods-section h3,
.onetime-foods-section h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.foods-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.food-item {
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: 0.5px solid var(--border-light);
    -webkit-tap-highlight-color: transparent;
}

.food-item:active {
    transform: scale(0.98);
    box-shadow: var(--shadow);
}

.food-item-name {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.food-item-brand {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.food-item-macros {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    font-weight: 500;
    margin-top: var(--spacing-xs);
}

/* My Data Form */
.my-data-form {
    padding: var(--spacing-lg);
}

.targets-section {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.targets-section h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.targets-display {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.target-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.target-item span:last-child {
    font-weight: 600;
    color: var(--gradient-start);
}

/* Progress View */
.chart-container {
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
    margin: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

#weight-chart {
    width: 100%;
    height: 300px;
}

.weights-list {
    padding: var(--spacing-lg);
}

.weights-list h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.weights-list-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.weight-list-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    font-weight: 500;
}

.weight-list-item span:last-child {
    font-weight: 700;
    color: var(--gradient-start);
}

/* Food Database */
.food-database-list {
    padding: var(--spacing-lg);
}

.food-database-list h3 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.food-db-item {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 0.5px solid var(--border-light);
}

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

.food-db-item-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.food-db-item-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.food-db-item-edit,
.food-db-item-delete {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-xs);
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.food-db-item-edit {
    color: var(--gradient-start);
}

.food-db-item-edit:active {
    background-color: rgba(255, 147, 15, 0.1);
}

.food-db-item-delete {
    color: var(--danger-color);
}

.food-db-item-delete:active {
    background-color: rgba(255, 59, 48, 0.1);
}

.food-db-item-macros {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: var(--spacing-sm);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 1000;
    padding: 0;
    overflow-y: auto;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.15);
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: auto;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 0.5px solid var(--border-light);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.modal-close:active {
    background-color: var(--bg-secondary);
    transform: scale(0.9);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* Tabs */
.add-food-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    border-bottom: 0.5px solid var(--border-light);
    padding: 0 var(--spacing-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-sm);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 15px;
    transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

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

.tab-btn:active {
    opacity: 0.7;
}

.tab-content {
    display: none;
}

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

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

.macro-inputs input {
    width: 100%;
}

.log-preview {
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin: var(--spacing-md) 0;
    font-size: 15px;
    font-weight: 500;
}

.loading {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    font-weight: 500;
}

.loading.hidden {
    display: none;
}

.ai-result {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.ai-result h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.loading-overlay.hidden {
    display: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-secondary);
    border-top-color: var(--gradient-start);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, 
        var(--bg-secondary) 0%, 
        var(--bg-tertiary) 50%, 
        var(--bg-secondary) 100%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-xs);
    color: transparent !important;
    pointer-events: none;
}

.skeleton-text {
    min-height: 1em;
    width: 100%;
}

/* Skeleton for calories summary box */
.calories-summary.skeleton {
    background: linear-gradient(90deg, 
        rgba(255, 147, 15, 0.1) 0%, 
        rgba(239, 112, 155, 0.15) 50%, 
        rgba(255, 147, 15, 0.1) 100%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    pointer-events: none;
    border-radius: var(--radius-xl); /* Match the calories-summary border-radius */
}

.calories-summary.skeleton .calories-value {
    color: transparent !important;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Responsive adjustments */
@media (min-width: 768px) {
    .app-view {
        max-width: 600px;
        margin: 0 auto;
    }

    .bottom-nav {
        max-width: 600px;
        left: 50%;
        transform: translateX(-50%);
    }

    .modal-content {
        border-radius: var(--radius-xl);
        margin: auto;
        max-height: 85vh;
    }

    .modal {
        align-items: center;
    }

    .macro-inputs {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* iOS-specific optimizations */
@supports (-webkit-touch-callout: none) {
    body {
        -webkit-touch-callout: none;
    }
    
    .btn,
    .nav-btn,
    .food-item {
        -webkit-touch-callout: none;
    }
}