/* =============================================================================
   CASHLEX — Design System Tokens
   All CSS custom properties. NEVER hardcode colors anywhere else.
   ============================================================================= */

/* =============================================================================
   DARK MODE (default)
   ============================================================================= */
:root,
[data-theme="dark"] {
    /* Backgrounds */
    --bg-primary:     #0D0E1A;
    --bg-card:        #13152A;
    --bg-input:       #1A1D35;
    --bg-sidebar:     #0A0B16;
    --bg-overlay:     rgba(0, 0, 0, 0.7);

    /* Text */
    --text-primary:   #E8EAFF;
    --text-secondary: #A0A8CC;
    --text-muted:     #6B7280;

    /* Borders */
    --border-subtle:  rgba(124, 58, 237, 0.2);
    --border-card:    rgba(124, 58, 237, 0.15);
    --border-input:   rgba(124, 58, 237, 0.25);

    /* Glass morphism */
    --glass-bg:       rgba(255, 255, 255, 0.03);
    --glass-hover:    rgba(255, 255, 255, 0.05);

    /* Skeleton loading */
    --skeleton-base:  #1A1D35;
    --skeleton-shine: #232645;

    /* Scrollbar */
    --scrollbar-track: #0D0E1A;
    --scrollbar-thumb: rgba(124, 58, 237, 0.3);
}

/* =============================================================================
   LIGHT MODE
   ============================================================================= */
[data-theme="light"] {
    --bg-primary:     #F0F2FF;
    --bg-card:        #FFFFFF;
    --bg-input:       #F8F9FF;
    --bg-sidebar:     #FAFAFF;
    --bg-overlay:     rgba(0, 0, 0, 0.5);

    --text-primary:   #0D0E1A;
    --text-secondary: #374151;
    --text-muted:     #6B7280;

    --border-subtle:  rgba(124, 58, 237, 0.15);
    --border-card:    rgba(124, 58, 237, 0.1);
    --border-input:   rgba(124, 58, 237, 0.2);

    --glass-bg:       rgba(255, 255, 255, 0.8);
    --glass-hover:    rgba(255, 255, 255, 0.95);

    --skeleton-base:  #E8EAFF;
    --skeleton-shine: #D4D8FF;

    --scrollbar-track: #F0F2FF;
    --scrollbar-thumb: rgba(124, 58, 237, 0.2);
}

/* =============================================================================
   SHARED TOKENS (theme-independent)
   ============================================================================= */
:root {
    /* Brand */
    --accent-primary:    #7C3AED;
    --accent-secondary:  #06B6D4;
    --gradient-main:     linear-gradient(135deg, #7C3AED 0%, #06B6D4 100%);
    --gradient-hover:    linear-gradient(135deg, #6D28D9 0%, #0891B2 100%);
    --gradient-subtle:   linear-gradient(135deg, rgba(124,58,237,0.1) 0%, rgba(6,182,212,0.1) 100%);

    /* Semantic */
    --success:      #10B981;
    --success-bg:   rgba(16, 185, 129, 0.1);
    --warning:      #F59E0B;
    --warning-bg:   rgba(245, 158, 11, 0.1);
    --danger:       #EF4444;
    --danger-bg:    rgba(239, 68, 68, 0.1);
    --info:         #3B82F6;
    --info-bg:      rgba(59, 130, 246, 0.1);

    /* Radius */
    --radius-sm:     6px;
    --radius-card:   12px;
    --radius-input:  8px;
    --radius-btn:    8px;
    --radius-lg:     16px;
    --radius-xl:     20px;
    --radius-full:   9999px;

    /* Spacing (8px base grid) */
    --space-1:  4px;
    --space-2:  8px;
    --space-3:  12px;
    --space-4:  16px;
    --space-5:  20px;
    --space-6:  24px;
    --space-8:  32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* Sidebar */
    --sidebar-width:          260px;
    --sidebar-width-collapsed: 0px;
    --topbar-height:          60px;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;

    /* Transitions */
    --transition:       200ms ease;
    --transition-slow:  400ms ease;
    --transition-fast:  100ms ease;

    /* Shadows */
    --shadow-sm:   0 1px 3px rgba(0,0,0,0.3);
    --shadow-md:   0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg:   0 8px 32px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 24px rgba(124,58,237,0.2);

    /* Z-index stack */
    --z-base:    1;
    --z-card:    10;
    --z-sticky:  100;
    /* Stacking: overlay dims the PAGE; the sidebar rides ABOVE the overlay.
       (overlay < sidebar is essential — reversed, taps on the menu hit the
       overlay's close handler and the menu appears broken) */
    --z-overlay: 300;
    --z-sidebar: 400;
    --z-modal:   400;
    --z-toast:   500;
}

/* =============================================================================
   RESET + BASE
   ============================================================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition), color var(--transition);
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--accent-primary); }

a { color: var(--accent-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-secondary); }

img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; font-family: var(--font-sans); }
input, textarea, select { font-family: var(--font-sans); }

/* Numeric displays */
.num { font-variant-numeric: tabular-nums; font-weight: 600; }

/* =============================================================================
   TYPOGRAPHY SCALE
   ============================================================================= */
.text-display { font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 800; letter-spacing: -0.02em; }
.text-h1      { font-size: clamp(1.5rem,  3vw, 2rem);   font-weight: 700; letter-spacing: -0.02em; }
.text-h2      { font-size: clamp(1.25rem, 2.5vw, 1.5rem); font-weight: 700; }
.text-h3      { font-size: 1.125rem; font-weight: 600; }
.text-body    { font-size: 0.9375rem; }
.text-sm      { font-size: 0.8125rem; }
.text-xs      { font-size: 0.75rem; }

/* =============================================================================
   GLASS CARD PATTERN
   ============================================================================= */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-card);
    position: relative;
}
/* The gradient top-accent uses a clipped ::before; we inset it slightly and
   round its corners instead of relying on overflow:hidden on the card, which
   (with backdrop-filter) truncated tall cards on mobile browsers. */

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10px;
    right: 10px;
    height: 2px;
    background: var(--gradient-main);
    opacity: 0.8;
    border-radius: 0 0 2px 2px;
}

.card-body { padding: var(--space-5); }
.card-sm   { padding: var(--space-4); }

.card-hover {
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card-hover:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    border-color: rgba(124, 58, 237, 0.4);
}

/* =============================================================================
   BUTTON PATTERNS
   ============================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-btn);
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    user-select: none;
    text-decoration: none;
}

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

/* Primary */
.btn-primary {
    background: var(--gradient-main);
    color: #ffffff;
    border-color: transparent;
}
.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.35);
    color: #ffffff;
}
.btn-primary:active { transform: translateY(0); }

/* Secondary */
.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}
.btn-secondary:hover {
    background: rgba(124, 58, 237, 0.08);
    transform: translateY(-1px);
    color: var(--accent-primary);
}

/* Danger */
.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger);
}
.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
    transform: translateY(-1px);
}

/* Ghost */
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border-subtle);
}
.btn-ghost:hover {
    background: var(--glass-hover);
    color: var(--text-primary);
    border-color: var(--border-input);
}

/* Sizes */
.btn-sm  { padding: 0.4rem 0.875rem; font-size: 0.8125rem; }
.btn-lg  { padding: 0.875rem 1.75rem; font-size: 1rem; }
.btn-full { width: 100%; }

/* Loading state */
.btn-loading { position: relative; color: transparent !important; }
.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* =============================================================================
   INPUT PATTERN
   ============================================================================= */
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }

.form-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.form-input,
.form-select,
.form-textarea {
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: var(--radius-input);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    width: 100%;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none;
}

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

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.form-input.error { border-color: var(--danger); }
.form-input.error:focus { box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15); }

.form-error {
    font-size: 0.8125rem;
    color: var(--danger);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.form-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Input with icon */
.input-wrap { position: relative; }
.input-wrap .form-input { padding-left: 2.75rem; }
.input-icon {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 18px;
    height: 18px;
    pointer-events: none;
}

/* =============================================================================
   BADGES + STATUS
   ============================================================================= */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0.2rem 0.625rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger); }
.badge-info    { background: var(--info-bg);    color: var(--info); }
.badge-accent  { background: rgba(124,58,237,0.12); color: var(--accent-primary); }

/* =============================================================================
   SKELETON LOADERS
   ============================================================================= */
.skeleton {
    background: var(--skeleton-base);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.skeleton::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--skeleton-shine) 50%,
        transparent 100%);
    animation: shimmer 1.4s infinite;
}

.skeleton-text  { height: 14px; border-radius: 4px; }
.skeleton-title { height: 22px; border-radius: 4px; }
.skeleton-card  { height: 120px; border-radius: var(--radius-card); }

/* =============================================================================
   TABLE
   ============================================================================= */
.table-wrap { overflow-x: auto; }

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th {
    background: var(--bg-input);
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.75rem 1rem;
    text-align: left;
    white-space: nowrap;
    border-bottom: 1px solid var(--border-subtle);
}

.table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-primary);
    vertical-align: middle;
}

.table tbody tr {
    transition: background var(--transition);
}

.table tbody tr:hover {
    background: var(--glass-hover);
}

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

/* =============================================================================
   MODAL
   ============================================================================= */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    z-index: var(--z-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(20px);
    transition: transform var(--transition);
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-5) 0;
}

.modal-title { font-size: 1.125rem; font-weight: 700; }

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    width: 32px; height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.modal-close:hover {
    background: var(--danger-bg);
    color: var(--danger);
}

.modal-body { padding: var(--space-5); }
.modal-footer {
    padding: 0 var(--space-5) var(--space-5);
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
}

/* =============================================================================
   TOAST NOTIFICATIONS
   ============================================================================= */
.toast-container {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-width: 360px;
    width: calc(100vw - 2rem);
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-lg);
    animation: slideInRight 200ms ease forwards;
    position: relative;
    overflow: hidden;
}

.toast::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
}

.toast-success::before { background: var(--success); }
.toast-error::before   { background: var(--danger); }
.toast-warning::before { background: var(--warning); }
.toast-info::before    { background: var(--info); }

.toast-icon { flex-shrink: 0; width: 20px; height: 20px; margin-top: 1px; }
.toast-success .toast-icon { color: var(--success); }
.toast-error   .toast-icon { color: var(--danger); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info    .toast-icon { color: var(--info); }

.toast-msg { font-size: 0.875rem; color: var(--text-primary); line-height: 1.5; }
.toast-dismiss {
    margin-left: auto;
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--text-muted);
    width: 20px; height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}
.toast-dismiss:hover { color: var(--text-primary); }

/* =============================================================================
   EMPTY STATE
   ============================================================================= */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-16) var(--space-4);
    text-align: center;
}

.empty-icon {
    color: var(--text-muted);
    opacity: 0.4;
    width: 56px;
    height: 56px;
}

.empty-title { font-size: 1rem; font-weight: 600; color: var(--text-secondary); }
.empty-desc  { font-size: 0.875rem; color: var(--text-muted); max-width: 280px; }

/* =============================================================================
   UTILITY CLASSES
   ============================================================================= */
.flex        { display: flex; }
.flex-col    { flex-direction: column; }
.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-5  { gap: var(--space-5); }
.gap-6  { gap: var(--space-6); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }

.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-muted   { color: var(--text-muted); }
.text-accent  { color: var(--accent-primary); }

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

/* Gradient text */
.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =============================================================================
   ANIMATIONS
   ============================================================================= */
@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes shimmer {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to   { transform: translateX(0);    opacity: 1; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
    0%   { transform: scale(0.9); opacity: 0; }
    100% { transform: scale(1);   opacity: 1; }
}

.animate-fade-in { animation: fadeIn 300ms ease forwards; }
.animate-pop-in  { animation: popIn 200ms ease forwards; }

/* =============================================================================
   RESPONSIVE BREAKPOINTS
   ============================================================================= */
@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .hide-mobile { display: none !important; }
}

@media (min-width: 641px) and (max-width: 1024px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .hide-tablet { display: none !important; }
}

@media (min-width: 1025px) {
    .hide-desktop { display: none !important; }
}

/* =============================================================================
   SHARED CONTROLS — used by BOTH user and admin shells.
   (Previously only in layout.css, which admin pages don't load — this left
    the admin theme toggle and hamburger unstyled/misaligned.)
   ============================================================================= */
.topbar-hamburger {
    background: none;
    border: none;
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition);
    flex-shrink: 0;
}
.topbar-hamburger:hover { background: var(--glass-hover); }
@media (min-width: 1025px) { .topbar-hamburger { display: none; } }

.theme-toggle {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    width: 44px;
    height: 24px;
    position: relative;
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
    padding: 0;
    display: inline-block;
    vertical-align: middle;
}
.theme-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-primary);
    transition: transform var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(20px);
    background: var(--warning);
}
.theme-toggle-icon { width: 10px; height: 10px; color: white; display: block; }