/* ============================================================
   INVENTEX — Design System
   Mobile-first, dark/light mode, accessible, professional.
   ============================================================ */

/* ---- 1. CSS CUSTOM PROPERTIES (LIGHT MODE DEFAULT) ---- */
:root {
    /* Brand Colors */
    --color-primary: #0D7C66;
    --color-primary-light: #11A386;
    --color-primary-dark: #095C4B;
    --color-primary-bg: #E6F5F1;

    /* Accent */
    --color-accent: #F59E0B;
    --color-accent-light: #FEF3C7;

    /* Semantic */
    --color-success: #16A34A;
    --color-success-bg: #DCFCE7;
    --color-warning: #D97706;
    --color-warning-bg: #FEF3C7;
    --color-danger: #DC2626;
    --color-danger-bg: #FEE2E2;
    --color-info: #2563EB;
    --color-info-bg: #DBEAFE;

    /* Neutrals */
    --color-bg: #F8FAFC;
    --color-surface: #FFFFFF;
    --color-surface-hover: #F1F5F9;
    --color-border: #E2E8F0;
    --color-border-strong: #CBD5E1;
    --color-text: #0F172A;
    --color-text-secondary: #475569;
    --color-text-muted: #94A3B8;
    --color-text-inverse: #FFFFFF;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.06);

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;

    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;

    --weight-normal: 400;
    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Borders */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --header-height: 60px;
    --bottom-nav-height: 64px;
    --max-width: 480px;
    --max-width-wide: 768px;
}

/* ---- 2. DARK MODE ---- */
[data-theme="dark"] {
    --color-primary: #2DD4A8;
    --color-primary-light: #5EEAD4;
    --color-primary-dark: #14B8A6;
    --color-primary-bg: #0D332A;

    --color-accent: #FBBF24;
    --color-accent-light: #422006;

    --color-success: #4ADE80;
    --color-success-bg: #052E16;
    --color-warning: #FBBF24;
    --color-warning-bg: #422006;
    --color-danger: #F87171;
    --color-danger-bg: #450A0A;
    --color-info: #60A5FA;
    --color-info-bg: #172554;

    --color-bg: #0F172A;
    --color-surface: #1E293B;
    --color-surface-hover: #334155;
    --color-border: #334155;
    --color-border-strong: #475569;
    --color-text: #F1F5F9;
    --color-text-secondary: #CBD5E1;
    --color-text-muted: #64748B;
    --color-text-inverse: #0F172A;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

/* ---- 3. RESET & BASE ---- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ---- 4. TYPOGRAPHY ---- */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--weight-bold);
    line-height: var(--leading-tight);
    color: var(--color-text);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-base); }
h6 { font-size: var(--text-sm); }

p {
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-bold { font-weight: var(--weight-bold); }
.text-semibold { font-weight: var(--weight-semibold); }
.text-medium { font-weight: var(--weight-medium); }

.currency {
    font-family: var(--font-mono);
    font-weight: var(--weight-semibold);
}

/* ---- 5. LAYOUT ---- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.container-wide {
    max-width: var(--max-width-wide);
}

.page {
    min-height: 100vh;
    min-height: 100dvh;
    padding-bottom: calc(var(--bottom-nav-height) + var(--space-4));
}

.page-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 var(--space-4);
    gap: var(--space-3);
}

.page-header h1,
.page-header h2 {
    font-size: var(--text-lg);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.page-content {
    padding: var(--space-4);
}

.section {
    margin-bottom: var(--space-6);
}

.section-title {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.flex-1 { flex: 1; }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }

.w-full { width: 100%; }
.h-full { height: 100%; }
.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ---- 6. BUTTONS ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 48px;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
    -webkit-user-select: none;
    text-decoration: none;
    line-height: 1;
}

.btn:active {
    transform: scale(0.97);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
}

[data-theme="dark"] .btn-primary {
    color: #0F172A;
}

.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border-strong);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-surface-hover);
}

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

.btn-danger:hover:not(:disabled) {
    opacity: 0.9;
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-surface-hover);
    color: var(--color-text);
}

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

.btn-sm {
    min-height: 36px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    border-radius: var(--radius-sm);
}

.btn-lg {
    min-height: 56px;
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-lg);
    border-radius: var(--radius-lg);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    min-height: 48px;
    min-width: 48px;
    padding: 0;
    border-radius: var(--radius-full);
}

.btn-icon.btn-sm {
    min-height: 36px;
    min-width: 36px;
}

/* ---- 7. CARDS ---- */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
}

.card-flat {
    box-shadow: none;
}

.card-clickable {
    cursor: pointer;
    transition: all var(--transition-fast);
}

.card-clickable:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.card-clickable:active {
    transform: scale(0.98);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
}

.card-title {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.card-value {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--color-text);
    font-family: var(--font-mono);
}

.card-value-sm {
    font-size: var(--text-lg);
}

.card-subtitle {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

/* Stat cards for dashboard */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
}

.stat-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
}

.stat-card .stat-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    font-weight: var(--weight-medium);
    margin-bottom: var(--space-1);
}

.stat-card .stat-value {
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    color: var(--color-text);
    font-family: var(--font-mono);
}

.stat-card .stat-change {
    font-size: var(--text-xs);
    margin-top: var(--space-1);
}

.stat-card .stat-change.positive { color: var(--color-success); }
.stat-card .stat-change.negative { color: var(--color-danger); }

/* ---- 8. FORMS ---- */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    min-height: 48px;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    color: var(--color-text);
    background-color: var(--color-surface);
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px var(--color-danger-bg);
}

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

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    padding-right: var(--space-10);
}

.form-hint {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

.form-error {
    font-size: var(--text-xs);
    color: var(--color-danger);
    margin-top: var(--space-1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

/* Search input */
.search-input {
    position: relative;
}

.search-input .form-input {
    padding-left: var(--space-10);
}

.search-input .search-icon {
    position: absolute;
    left: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

/* ---- 9. BADGES & STATUS ---- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    border-radius: var(--radius-full);
    line-height: 1;
    white-space: nowrap;
}

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

.badge-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.badge-warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.badge-info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.badge-neutral {
    background-color: var(--color-surface-hover);
    color: var(--color-text-secondary);
}

/* Status dot */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    display: inline-block;
}

.status-dot.success { background-color: var(--color-success); }
.status-dot.warning { background-color: var(--color-warning); }
.status-dot.danger { background-color: var(--color-danger); }
.status-dot.info { background-color: var(--color-info); }
.status-dot.muted { background-color: var(--color-text-muted); }

/* ---- 10. ALERTS ---- */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
}

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

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

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

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

.alert-icon {
    font-size: var(--text-lg);
    flex-shrink: 0;
    line-height: 1;
}

/* ---- 11. BOTTOM NAVIGATION (Mobile) ---- */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-around;
    height: var(--bottom-nav-height);
    padding-bottom: env(safe-area-inset-bottom, 0);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    flex: 1;
    height: 100%;
    color: var(--color-text-muted);
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    text-decoration: none;
    transition: color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-1) 0;
}

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

.bottom-nav-item .nav-icon {
    font-size: 22px;
    line-height: 1;
}

.bottom-nav-item .nav-label {
    font-size: 10px;
    letter-spacing: 0.02em;
}

/* Sell button (center, prominent) */
.bottom-nav-item.sell-btn {
    position: relative;
    top: -8px;
}

.bottom-nav-item.sell-btn .nav-icon {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: var(--shadow-md);
}

[data-theme="dark"] .bottom-nav-item.sell-btn .nav-icon {
    color: #0F172A;
}

/* ---- 12. LISTS ---- */
.list {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.list-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--transition-fast);
    text-decoration: none;
    color: var(--color-text);
    min-height: 56px;
}

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

.list-item:hover {
    background-color: var(--color-surface-hover);
    text-decoration: none;
}

.list-item:active {
    background-color: var(--color-border);
}

.list-item-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background-color: var(--color-primary-bg);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    flex-shrink: 0;
}

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

.list-item-title {
    font-size: var(--text-base);
    font-weight: var(--weight-medium);
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.list-item-subtitle {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: 2px;
}

.list-item-trailing {
    text-align: right;
    flex-shrink: 0;
}

.list-item-value {
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    color: var(--color-text);
    font-family: var(--font-mono);
}

.list-item-meta {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* ---- 13. MODAL / OVERLAY ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 500;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--color-surface);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    width: 100%;
    max-width: var(--max-width);
    max-height: 85vh;
    overflow-y: auto;
    padding: var(--space-6) var(--space-4);
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-handle {
    width: 40px;
    height: 4px;
    background-color: var(--color-border-strong);
    border-radius: var(--radius-full);
    margin: 0 auto var(--space-4);
}

.modal-title {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-4);
}

/* Center modal for desktop */
@media (min-width: 768px) {
    .modal-overlay {
        align-items: center;
    }
    .modal {
        border-radius: var(--radius-xl);
        max-height: 80vh;
        transform: translateY(20px);
        opacity: 0;
    }
    .modal-overlay.active .modal {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ---- 14. LOADING ---- */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 0.6s linear infinite;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

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

.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    gap: var(--space-4);
    color: var(--color-text-muted);
}

.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-surface-hover) 25%,
        var(--color-border) 50%,
        var(--color-surface-hover) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

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

.skeleton-text {
    height: 16px;
    margin-bottom: var(--space-2);
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: var(--space-3);
}

.skeleton-card {
    height: 100px;
    border-radius: var(--radius-md);
}

/* ---- 15. EMPTY STATES ---- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-12) var(--space-4);
    gap: var(--space-4);
}

.empty-state-icon {
    font-size: 48px;
    opacity: 0.4;
}

.empty-state-title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--color-text);
}

.empty-state-text {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    max-width: 280px;
}

/* ---- 16. TOAST / NOTIFICATION ---- */
.toast-container {
    position: fixed;
    top: var(--space-4);
    left: var(--space-4);
    right: var(--space-4);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    pointer-events: none;
}

.toast {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    pointer-events: auto;
    animation: slideDown 0.3s ease;
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.toast.success { border-left: 4px solid var(--color-success); }
.toast.error { border-left: 4px solid var(--color-danger); }
.toast.warning { border-left: 4px solid var(--color-warning); }
.toast.info { border-left: 4px solid var(--color-info); }

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- 17. THEME TOGGLE ---- */
.theme-toggle {
    position: relative;
    width: 52px;
    height: 28px;
    background-color: var(--color-border-strong);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    border: none;
    padding: 0;
    flex-shrink: 0;
}

.theme-toggle::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background-color: var(--color-surface);
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .theme-toggle {
    background-color: var(--color-primary);
}

[data-theme="dark"] .theme-toggle::after {
    transform: translateX(24px);
}

.theme-toggle-icons {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 6px;
    font-size: 12px;
    pointer-events: none;
}

/* ---- 18. SYNC STATUS INDICATOR ---- */
.sync-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    background-color: var(--color-surface-hover);
}

.sync-indicator.synced { color: var(--color-success); }
.sync-indicator.pending { color: var(--color-warning); }
.sync-indicator.error { color: var(--color-danger); }

/* ---- 19. TABLES (for reports) ---- */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.table th {
    background-color: var(--color-surface-hover);
    font-weight: var(--weight-semibold);
    color: var(--color-text-secondary);
    text-align: left;
    padding: var(--space-3) var(--space-4);
    white-space: nowrap;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.table td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background-color: var(--color-surface-hover);
}

/* ---- 20. TABS ---- */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-text-muted);
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: all var(--transition-fast);
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    cursor: pointer;
}

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab:hover:not(.active) {
    color: var(--color-text);
}

/* ---- 21. DIVIDER ---- */
.divider {
    height: 1px;
    background-color: var(--color-border);
    margin: var(--space-4) 0;
}

/* ---- 22. IMAGE SLOTS ---- */
.image-slot {
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--color-surface-hover);
    position: relative;
}

.image-slot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-slot-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 160px;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
}

/* ---- 23. SCANNER OVERLAY ---- */
.scanner-overlay {
    position: fixed;
    inset: 0;
    z-index: 300;
    background-color: #000;
}

.scanner-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 310;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    padding-top: calc(var(--space-4) + env(safe-area-inset-top, 0));
    color: #FFFFFF;
}

.scanner-frame {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 260px;
    height: 260px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
}

/* ---- 24. RESPONSIVE ---- */
@media (min-width: 768px) {
    :root {
        --max-width: 600px;
    }

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

    .bottom-nav {
        max-width: var(--max-width-wide);
        left: 50%;
        transform: translateX(-50%);
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        border-left: 1px solid var(--color-border);
        border-right: 1px solid var(--color-border);
    }
}

@media (min-width: 1024px) {
    :root {
        --max-width: 720px;
    }

    .stat-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ---- 25. PRINT STYLES ---- */
@media print {
    .bottom-nav,
    .page-header,
    .theme-toggle,
    .btn,
    .toast-container {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .card {
        border: 1px solid #ccc;
        box-shadow: none;
        break-inside: avoid;
    }
}

/* ---- 26. UTILITY: Safe Area (notched phones) ---- */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .bottom-nav {
        padding-bottom: env(safe-area-inset-bottom);
        height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
    }

    .page {
        padding-bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom) + var(--space-4));
    }
}