/* ========================================
   Mobile Inventur - Styles
   ======================================== */

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

:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --success: #27ae60;
    --success-dark: #219a52;
    --danger: #e74c3c;
    --danger-dark: #c0392b;
    --warning: #f39c12;
    --warning-dark: #d68910;
    --secondary: #95a5a6;
    --secondary-dark: #7f8c8d;
    --dark: #2c3e50;
    --light: #ecf0f1;
    --white: #ffffff;
    --heading: var(--dark);
    --text: #333333;
    --text-light: #666666;
    --border: #ddd;
    --shadow: rgba(0,0,0,0.1);
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text);
    background: var(--light);
    overflow-x: hidden;
}

body,
.app-header,
.menu,
.scan-status,
#scanner-container,
.quantity-input,
.records-summary,
.record-item,
.upload-section,
.info-card,
.settings-group,
.manual-input input,
.quantity-controls input,
.setting-item select,
.setting-item input[type="email"],
.setting-item input[type="text"] {
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

/* ========================================
   Header
   ======================================== */

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--dark);
    color: var(--white);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}

.icon-btn:hover,
.icon-btn:active {
    background: rgba(255,255,255,0.1);
}

/* ========================================
   Navigation Menu
   ======================================== */

.menu {
    display: flex;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.menu.hidden {
    display: none;
}

.menu-item {
    flex: 1;
    min-width: 80px;
    padding: 12px 8px;
    border: none;
    background: none;
    font-size: 0.85rem;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.menu-item.active {
    color: var(--primary);
    border-bottom: 3px solid var(--primary);
    font-weight: 600;
}

.menu-item:hover {
    background: var(--light);
}

/* ========================================
   Pages
   ======================================== */

main {
    flex: 1;
    padding: 16px;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page.hidden {
    display: none;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    touch-action: manipulation;
}

.btn:active {
    transform: scale(0.98);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.25rem;
    min-width: 60px;
}

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

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

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

.btn-success:hover,
.btn-success:active {
    background: var(--success-dark);
}

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

.btn-danger:hover,
.btn-danger:active {
    background: var(--danger-dark);
}

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

.btn-warning:hover,
.btn-warning:active {
    background: var(--warning-dark);
}

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

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

/* ========================================
   Scan Page
   ======================================== */

.scan-status {
    background: var(--white);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px var(--shadow);
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.status-item:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

.status-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.status-value {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--heading);
}

.status-value.valid {
    color: var(--success);
}

.status-value.invalid {
    color: var(--danger);
}

#scanner-container {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px var(--shadow);
}

#reader {
    width: 100%;
    min-height: 280px;
}

#reader video {
    width: 100% !important;
    border-radius: 12px;
}

.manual-input {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.manual-input input {
    flex: 1;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--white);
    color: var(--text);
}

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

/* ========================================
   Quantity Input
   ======================================== */

.quantity-input {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px var(--shadow);
    text-align: center;
}

.quantity-input h3 {
    margin-bottom: 16px;
    color: var(--heading);
}

.quantity-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
}

.quantity-controls input {
    width: 100px;
    padding: 16px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: var(--white);
    color: var(--text);
}

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

.quantity-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

/* ========================================
   Feedback
   ======================================== */

.feedback {
    padding: 16px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    animation: fadeIn 0.3s ease;
}

.feedback.hidden {
    display: none;
}

.feedback.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.feedback.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.feedback.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.feedback.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

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

/* ========================================
   Records Page
   ======================================== */

.page-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.page-actions .btn {
    flex: 1;
    min-width: 120px;
}

.records-summary {
    background: var(--white);
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    text-align: center;
    font-weight: 500;
    color: var(--text-light);
}

.records-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.record-item {
    background: var(--white);
    border-radius: 8px;
    padding: 12px 16px;
    box-shadow: 0 1px 4px var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.record-info {
    flex: 1;
}

.record-location {
    font-size: 0.85rem;
    color: var(--text-light);
}

.record-item-code {
    font-weight: 600;
    color: var(--heading);
}

.record-quantity {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    min-width: 60px;
    text-align: right;
}

.record-delete {
    background: none;
    border: none;
    color: var(--danger);
    font-size: 1.25rem;
    padding: 8px;
    cursor: pointer;
    margin-left: 8px;
}

/* ========================================
   Master Data Page
   ======================================== */

.upload-section {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px var(--shadow);
}

.upload-section h3 {
    margin-bottom: 8px;
}

.upload-section p {
    color: var(--text-light);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.upload-section input[type="file"] {
    display: block;
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border: 2px dashed var(--border);
    border-radius: 8px;
    background: var(--light);
}

.master-info {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.info-card {
    flex: 1;
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 8px var(--shadow);
}

.info-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.info-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.master-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ========================================
   Settings Page
   ======================================== */

.settings-group {
    background: var(--white);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px var(--shadow);
}

.settings-group h3 {
    margin-bottom: 12px;
    color: var(--heading);
    font-size: 1rem;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

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

.setting-item span {
    color: var(--text);
}

.setting-item select,
.setting-item input[type="email"],
.setting-item input[type="text"] {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    min-width: 150px;
    background: var(--white);
    color: var(--text);
}

.setting-item input[type="checkbox"] {
    width: 22px;
    height: 22px;
    cursor: pointer;
}

.settings-group .btn {
    width: 100%;
    margin-top: 8px;
}

.app-info {
    text-align: center;
    padding: 20px;
    color: var(--text-light);
    font-size: 0.85rem;
}

/* ========================================
   Toast Notifications
   ======================================== */

.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--dark);
    color: var(--white);
    padding: 14px 24px;
    border-radius: 8px;
    font-weight: 500;
    z-index: 1000;
    animation: slideUp 0.3s ease;
    max-width: 90%;
    text-align: center;
}

.toast.hidden {
    display: none;
}

.toast.success {
    background: var(--success);
}

.toast.error {
    background: var(--danger);
}

@keyframes slideUp {
    from { 
        opacity: 0; 
        transform: translateX(-50%) translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateX(-50%) translateY(0); 
    }
}

/* ========================================
   Utilities
   ======================================== */

.hidden {
    display: none !important;
}

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

.mt-16 {
    margin-top: 16px;
}

.mb-16 {
    margin-bottom: 16px;
}

/* ========================================
   Responsive
   ======================================== */

@media (min-width: 768px) {
    main {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .page-actions .btn {
        flex: none;
    }
}

/* ========================================
   Dark Mode
   Applied via [data-theme="dark"] on <html>,
   set by js/app.js (with a system-preference
   fallback for first paint, see index.html)
   ======================================== */

:root[data-theme="dark"] {
    --light: #1a1a2e;
    --white: #16213e;
    --heading: #eaeaea;
    --text: #eaeaea;
    --text-light: #a0a0a0;
    --border: #2a2a4a;
    --shadow: rgba(0,0,0,0.3);
}

:root[data-theme="dark"] .app-header {
    background: #0f0f1a;
}