/* ==========================================
   NOFTE - RESPONSIVE DESKTOP DESIGN
   Modern, Clean, User-Friendly
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* =========================
   CSS VARIABLES - DARK THEME (NoFTe Brand)
   ========================= */
:root {
    --primary: #52D9B0;
    --primary-hover: #6BE0C0;
    --primary-dark: #1D9E75;
    --primary-light: rgba(82, 217, 176, 0.15);
    --primary-glow: rgba(82, 217, 176, 0.3);

    --bg-primary: #0A1628;
    --bg-secondary: #0F2137;
    --bg-tertiary: #162D4A;
    --bg-card: #0F2137;
    --bg-card-hover: #162D4A;

    --border: #1E3A5F;
    --border-light: #2A4A6F;

    --text-primary: #FFFFFF;
    --text-secondary: #A8C0D8;
    --text-muted: #6B8AAD;

    --success: #52D9B0;
    --success-bg: rgba(82, 217, 176, 0.15);
    --success-border: rgba(82, 217, 176, 0.3);

    --warning: #F59E0B;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --warning-border: rgba(245, 158, 11, 0.3);

    --danger: #EF4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --danger-border: rgba(239, 68, 68, 0.3);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --sidebar-width: 260px;
    --header-height: 70px;

    --transition: all 0.2s ease;
}

/* =========================
   CSS VARIABLES - LIGHT THEME (NoFTe Brand)
   ========================= */
:root[data-theme="light"] {
    --primary: #1B4F72;
    --primary-hover: #226085;
    --primary-dark: #153d5c;
    --primary-light: rgba(82, 217, 176, 0.15);
    --primary-glow: rgba(82, 217, 176, 0.3);

    --bg-primary: #FFFFFF;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F1F5F9;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F8FAFC;

    --border: #E2E8F0;
    --border-light: #CBD5E1;

    --text-primary: #1B4F72;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;

    --success: #1D9E75;
    --success-bg: rgba(29, 158, 117, 0.1);
    --success-border: rgba(29, 158, 117, 0.3);

    --warning: #F59E0B;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --warning-border: rgba(245, 158, 11, 0.3);

    --danger: #DC2626;
    --danger-bg: rgba(220, 38, 38, 0.1);
    --danger-border: rgba(220, 38, 38, 0.3);

    --shadow-sm: 0 2px 8px rgba(27, 79, 114, 0.08);
    --shadow-md: 0 4px 16px rgba(27, 79, 114, 0.1);
    --shadow-lg: 0 8px 32px rgba(27, 79, 114, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

/* =========================
   LAYOUT - MAIN APP
   ========================= */
.app {
    display: flex;
    min-height: 100vh;
}

/* =========================
   SIDEBAR - DESKTOP
   ========================= */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

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

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.logo-text {
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), #1D9E75);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

.nav-item:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

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

.nav-item .nav-icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

.nav-item .nav-label {
    flex: 1;
}

.nav-badge {
    background: var(--danger);
    color: white;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
}

.user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.user-card:hover {
    background: var(--bg-card);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #1D9E75);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    color: white;
}

.user-info h4 {
    font-size: 14px;
    font-weight: 600;
}

.user-info p {
    font-size: 12px;
    color: var(--text-muted);
}

/* =========================
   MAIN CONTENT
   ========================= */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

/* =========================
   HEADER - TOP BAR
   ========================= */
.header {
    height: var(--header-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left h1 {
    font-size: 24px;
    font-weight: 700;
}

.header-left p {
    font-size: 14px;
    color: var(--text-secondary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
}

.icon-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
}

/* =========================
   PAGE CONTENT
   ========================= */
.page-content {
    padding: 32px;
}

.page-header {
    margin-bottom: 32px;
}

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* =========================
   CARDS
   ========================= */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-light);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h2 {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* =========================
   BADGES
   ========================= */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-primary {
    background: var(--primary-light);
    color: var(--primary);
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success-border);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid var(--warning-border);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid var(--danger-border);
}

/* =========================
   STATS GRID
   ========================= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), #1D9E75);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.stat-card .stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 16px;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.stat-card .stat-value {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card .stat-change {
    font-size: 12px;
    color: var(--success);
    margin-top: 4px;
}

/* =========================
   GRID LAYOUTS
   ========================= */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* =========================
   FRESHNESS CIRCLE
   ========================= */
.freshness-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px;
}

.freshness-circle {
    width: 180px;
    height: 180px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.freshness-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 6px solid var(--border);
    border-top-color: var(--success);
    animation: spin 3s linear infinite;
}

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

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

.freshness-value {
    font-size: 48px;
    font-weight: 800;
    color: var(--success);
}

.freshness-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* =========================
   ANALYTICS
   ========================= */
.analytics-hero {
    text-align: center;
    padding: 32px;
    background: linear-gradient(135deg, var(--success-bg), transparent);
    border-radius: var(--radius-lg);
    border: 1px solid var(--success-border);
    margin-bottom: 24px;
}

.analytics-percentage {
    font-size: 56px;
    font-weight: 800;
    color: var(--success);
}

.analytics-label {
    font-size: 16px;
    color: var(--text-secondary);
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.analytics-stat {
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.analytics-stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--success);
}

.analytics-stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 4px;
}

/* =========================
   RECOMMENDATIONS
   ========================= */
.rec-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    border-left: 4px solid transparent;
    transition: var(--transition);
}

.rec-item:hover {
    background: var(--bg-card-hover);
}

.rec-item.urgent {
    border-left-color: var(--danger);
    background: linear-gradient(90deg, var(--danger-bg), var(--bg-tertiary));
}

.rec-item.warning {
    border-left-color: var(--warning);
    background: linear-gradient(90deg, var(--warning-bg), var(--bg-tertiary));
}

.rec-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.rec-content h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}

.rec-content p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.rec-suggestion {
    font-size: 12px;
    color: var(--primary);
    font-weight: 500;
}

/* =========================
   MENU CARDS
   ========================= */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.menu-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.menu-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.menu-time {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.menu-card h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
}

.menu-card p {
    font-size: 12px;
    color: var(--text-secondary);
}

.menu-card .calories {
    display: block;
    margin-top: 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--success);
}

/* =========================
   LIST ITEMS
   ========================= */
.list-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

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

.list-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.list-info {
    flex: 1;
}

.list-info h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
}

.list-info span {
    font-size: 13px;
    color: var(--text-secondary);
}

/* =========================
   INVENTORY GRID
   ========================= */
.inventory-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.inventory-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.inventory-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.inventory-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.inventory-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.inventory-card span {
    font-size: 13px;
    color: var(--text-secondary);
}

/* =========================
   EXPIRY LIST
   ========================= */
.expiry-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.expiry-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border-left: 4px solid transparent;
    transition: var(--transition);
}

.expiry-item:hover {
    background: var(--bg-card-hover);
}

.expiry-item.danger {
    border-left-color: var(--danger);
}

.expiry-item.warning {
    border-left-color: var(--warning);
}

.expiry-item.safe {
    border-left-color: var(--success);
}

.expiry-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.expiry-info {
    flex: 1;
}

.expiry-info h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.expiry-info p {
    font-size: 12px;
    color: var(--text-muted);
}

.expiry-days {
    text-align: center;
    padding: 12px 16px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    min-width: 80px;
}

.expiry-days-value {
    font-size: 20px;
    font-weight: 700;
}

.expiry-days-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* =========================
   SCAN PAGE
   ========================= */
.scan-container {
    border: 2px dashed var(--border);
    border-radius: var(--radius-xl);
    height: 350px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    transition: var(--transition);
}

.scan-container:hover {
    border-color: var(--primary);
}

.scan-icon {
    font-size: 72px;
    margin-bottom: 20px;
    opacity: 0.8;
}

.scan-placeholder p {
    color: var(--text-secondary);
    font-size: 16px;
}

.scan-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 24px;
}

#previewImage {
    max-width: 100%;
    max-height: 330px;
    border-radius: var(--radius-lg);
}

/* =========================
   AI STEPS
   ========================= */
.ai-steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.ai-step-card {
    padding: 24px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
}

.ai-step-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.step-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #1D9E75);
    color: white;
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.ai-step-card h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

.ai-step-card p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* =========================
   RESULT DETAILS
   ========================= */
.result-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin: 20px 0;
}

.result-detail {
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border);
}

.result-detail-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--success);
}

.result-detail-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 4px;
}

/* =========================
   CHAT
   ========================= */
.chat-container {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
}

.chat-box {
    height: 450px;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    max-width: 70%;
    padding: 14px 18px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.6;
}

.message.ai {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.message.user {
    background: linear-gradient(135deg, var(--primary), #1D9E75);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.chat-input {
    display: flex;
    gap: 12px;
    padding: 20px;
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border);
}

.chat-input input {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
}

.chat-input input:focus {
    outline: none;
    border-color: var(--primary);
}

/* =========================
   FORMS
   ========================= */
.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

input, select {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

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

input::placeholder {
    color: var(--text-muted);
}

label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

/* =========================
   SEARCH
   ========================= */
.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    padding: 0;
}

.search-box input:focus {
    border: none;
}

/* =========================
   SETTINGS
   ========================= */
.settings-profile {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    margin-bottom: 24px;
    cursor: pointer;
    transition: var(--transition);
}

.settings-profile:hover {
    background: var(--bg-card-hover);
}

.settings-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    margin-bottom: 16px;
    overflow: hidden;
}

.settings-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
}

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

.settings-item:hover {
    background: var(--bg-card-hover);
}

.settings-item-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.settings-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.settings-label {
    font-size: 14px;
    font-weight: 500;
}

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

/* Toggle Switch */
.toggle {
    position: relative;
    width: 48px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--border);
    border-radius: 28px;
    transition: 0.3s;
}

.toggle-slider::before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

/* =========================
   BUTTONS
   ========================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #1D9E75);
    color: white;
    box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--primary-glow);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
}

.btn-icon {
    padding: 12px;
}

/* =========================
   UTILITY CLASSES
   ========================= */
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--text-muted); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }

/* =========================
   RESPONSIVE - TABLET
   ========================= */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .menu-grid,
    .inventory-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .ai-steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* =========================
   RESPONSIVE - MOBILE SIDEBAR
   ========================= */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .mobile-header {
        display: flex !important;
    }
}

/* =========================
   RESPONSIVE - MOBILE
   ========================= */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
        --header-height: 60px;
    }

    .header {
        padding: 0 16px;
    }

    .header-left h1 {
        font-size: 18px;
    }

    .header-left p {
        font-size: 12px;
    }

    .page-content {
        padding: 16px;
    }

    .page-header h1 {
        font-size: 22px;
    }

    /* Stats - Single column on mobile */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .stat-card {
        padding: 16px;
        display: flex;
        align-items: center;
        gap: 16px;
    }

    .stat-card::before {
        display: none;
    }

    .stat-card .stat-icon {
        margin-bottom: 0;
        width: 48px;
        height: 48px;
    }

    .stat-card .stat-content {
        flex: 1;
    }

    .stat-card .stat-value {
        font-size: 24px;
    }

    /* Grids */
    .grid-2,
    .grid-3,
    .menu-grid,
    .inventory-grid,
    .ai-steps-grid {
        grid-template-columns: 1fr;
    }

    .analytics-grid {
        grid-template-columns: 1fr;
    }

    /* Cards */
    .card {
        padding: 16px;
        margin-bottom: 16px;
    }

    .card-header {
        margin-bottom: 16px;
    }

    /* Form */
    .form-row {
        grid-template-columns: 1fr;
    }

    /* List items */
    .list-item {
        padding: 12px 0;
    }

    .list-icon {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

    /* Expiry */
    .expiry-item {
        padding: 12px;
        flex-wrap: wrap;
    }

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

    .expiry-days {
        width: 100%;
        margin-top: 8px;
        display: flex;
        justify-content: center;
        gap: 8px;
    }

    /* Scan */
    .scan-container {
        height: 250px;
    }

    .scan-icon {
        font-size: 56px;
    }

    .scan-actions {
        flex-direction: column;
    }

    .scan-actions .btn {
        width: 100%;
    }

    /* Chat */
    .chat-box {
        height: 350px;
        padding: 16px;
    }

    .message {
        max-width: 85%;
    }

    /* Freshness */
    .freshness-circle {
        width: 140px;
        height: 140px;
    }

    .freshness-value {
        font-size: 36px;
    }

    /* Buttons */
    .btn {
        padding: 12px 20px;
        font-size: 13px;
    }
}

/* =========================
   MOBILE HEADER (Hidden by default)
   ========================= */
.mobile-header {
    display: none;
    align-items: center;
    gap: 12px;
}

.menu-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
}

/* =========================
   OVERLAY (For mobile sidebar)
   ========================= */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.sidebar-overlay.active {
    display: block;
}

/* =========================
   NOTIFICATION SYSTEM
   ========================= */
.notification-btn {
    position: relative;
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    background: var(--danger);
    color: white;
    font-size: 10px;
    font-weight: 700;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.notification-dropdown {
    position: fixed;
    top: 70px;
    right: 32px;
    width: 360px;
    max-height: 480px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 200;
    overflow: hidden;
    display: none;
    flex-direction: column;
}

.notification-dropdown.show {
    display: flex;
}

.notification-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.notification-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.notification-count {
    background: var(--danger);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 12px;
}

.notification-list {
    flex: 1;
    overflow-y: auto;
    max-height: 400px;
}

.notification-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.notification-item:hover {
    background: var(--bg-card-hover);
}

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

.notification-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--danger-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-content h4 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 2px;
}

.notification-content p {
    font-size: 12px;
    color: var(--text-secondary);
}

.notification-days {
    font-size: 12px;
    font-weight: 600;
    color: var(--danger);
    white-space: nowrap;
}

.notification-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.notification-empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.5;
}

.notification-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.notification-footer a {
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
}

.notification-footer a:hover {
    text-decoration: underline;
}

/* Mobile notification */
@media (max-width: 768px) {
    .notification-dropdown {
        top: 60px;
        right: 8px;
        left: 8px;
        width: auto;
    }
}