/* =====================================================
   DESIGN TOKENS
   ===================================================== */
:root {
    --color-primary: #4b2bee;
    --color-primary-hover: #3d24be;
    --color-primary-light: #5d3aff;
    --color-primary-alpha: rgba(75, 43, 238, 0.1);

    --surface-body: #131022;
    --surface-sidebar: #1e1933;
    --surface-card: #2a2440;
    --surface-elevated: #251f3d;
    --surface-hover: #342d50;

    --border-default: #2d2640;
    --border-card: #3d3654;

    --text-primary: #ffffff;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 20px;

    --sidebar-width: 350px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

body {
    font-family: 'Space Grotesk', sans-serif;
    background: var(--surface-body);
    color: var(--text-secondary);
    overflow-x: hidden;
}

/* =====================================================
   SKIP NAVIGATION (a11y)
   ===================================================== */
.skip-nav {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 10001;
    background: var(--color-primary);
    color: white;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-decoration: none;
    transition: top var(--transition-fast);
}

.skip-nav:focus {
    top: 16px;
}

/* =====================================================
   FOCUS STYLES (a11y)
   ===================================================== */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* =====================================================
   SCREEN READER ONLY (a11y)
   ===================================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =====================================================
   LAYOUT
   ===================================================== */
.main-container {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    height: 100vh;
    gap: 0;
}

.sidebar {
    background: var(--surface-sidebar);
    border-right: 1px solid var(--border-default);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--surface-sidebar);
}

.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track {
    background: var(--surface-sidebar);
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--space-xs);
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-light);
}

.main-content {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: var(--space-xl);
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--surface-body);
}

.main-content::-webkit-scrollbar {
    width: 8px;
}

.main-content::-webkit-scrollbar-track {
    background: var(--surface-body);
}

.main-content::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--space-xs);
}

.main-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-light);
}

/* =====================================================
   HEADER & SECTIONS
   ===================================================== */
.header {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-default);
}

.config-section {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-default);
}

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

.action-panel {
    padding: var(--space-xl);
    background: var(--surface-sidebar);
    border-top: 1px solid var(--border-default);
}

/* =====================================================
   ICON CARDS
   ===================================================== */
.icon-card {
    background: var(--surface-sidebar);
    border: 2px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: border-color var(--transition-fast),
                background-color var(--transition-fast),
                transform var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    position: relative;
}

.icon-card:hover {
    border-color: var(--color-primary);
    background: var(--surface-elevated);
}

.icon-card:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.icon-card.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-alpha);
    transform: scale(1.02);
}

.icon-card img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.quantity-input {
    display: none;
    margin-top: var(--space-sm);
    animation: fadeSlideIn 0.2s ease;
}

.icon-card.selected .quantity-input {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.individual-settings {
    display: none;
    margin-top: var(--space-sm);
    animation: fadeSlideIn 0.2s ease;
}

.icon-card.selected .individual-settings {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.icon-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-card);
    border-radius: var(--radius-sm);
    font-weight: 600;
    color: var(--text-muted);
}

.hidden {
    display: none !important;
}

.sheet-indicator {
    position: absolute;
    bottom: var(--space-sm);
    right: var(--space-sm);
    background: var(--surface-card);
    color: var(--text-secondary);
    font-size: 10px;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    opacity: 0.9;
}

/* =====================================================
   CATEGORY HEADER
   ===================================================== */
.category-header {
    background: var(--surface-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-size: 14px;
}

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

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-secondary:hover {
    background: var(--surface-hover);
}

/* =====================================================
   PREVIEW & MAGNIFIER
   ===================================================== */
.preview-box {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    aspect-ratio: 210 / 297;
    display: flex;
    align-items: center;
    justify-content: center;
    max-height: 400px;
    position: relative;
    overflow: hidden;
    transition: aspect-ratio var(--transition-normal);
}

.preview-box.zooming {
    cursor: none;
}

.magnifier-loupe {
    display: none;
    position: absolute;
    width: 150px;
    height: 150px;
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    pointer-events: none;
    background-repeat: no-repeat;
    box-shadow: 0 0 20px rgba(75, 43, 238, 0.5);
    z-index: 10;
}

/* =====================================================
   LOADING OVERLAY
   ===================================================== */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-default);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* =====================================================
   FORM CONTROLS
   ===================================================== */
.select-wrapper {
    position: relative;
    width: 100%;
}

.select-wrapper::after {
    content: '';
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid var(--text-muted);
    pointer-events: none;
    transition: border-top-color var(--transition-fast);
}

.select-wrapper:hover::after {
    border-top-color: var(--text-primary);
}

select {
    background: var(--surface-sidebar);
    border: 1px solid var(--border-card);
    color: var(--text-primary);
    padding: 10px 32px 10px 16px;
    border-radius: var(--radius-sm);
    width: 100%;
    font-size: 14px;
    font-weight: 400;
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-text-fill-color: var(--text-primary);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    box-shadow: none;
}

select:hover {
    border-color: var(--color-primary);
}

select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary);
}

/* option elements require !important for cross-browser styling */
select option {
    background-color: #ffffff !important;
    color: #000000 !important;
    padding: 10px;
    font-weight: 500;
}

@-moz-document url-prefix() {
    select option {
        background: white !important;
        color: black !important;
    }
}

input[type="number"] {
    background: var(--surface-card);
    border: 1px solid var(--border-card);
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    width: 100%;
    font-size: 14px;
    -webkit-text-fill-color: var(--text-primary);
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(75, 43, 238, 0.2);
}

.search-input {
    background: var(--surface-sidebar);
    border: 1px solid var(--border-card);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    width: 100%;
    font-size: 14px;
    font-weight: 400;
    transition: all var(--transition-fast);
    -webkit-text-fill-color: var(--text-primary);
}

.search-input:hover {
    border-color: var(--color-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary);
}

.search-input::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

.individual-settings select {
    padding: 6px 28px 6px 10px;
    font-size: 11px;
    background: var(--surface-card);
    border: 1px solid var(--border-card);
}

.individual-settings label {
    margin-top: var(--space-xs);
    font-size: 10px;
}

/* =====================================================
   TOAST NOTIFICATIONS
   ===================================================== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    pointer-events: none;
}

.toast {
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    background: var(--surface-card);
    border: 1px solid var(--border-card);
    color: var(--text-primary);
    font-size: 14px;
    max-width: 400px;
    transform: translateX(120%);
    opacity: 0;
    transition: all var(--transition-normal);
    pointer-events: auto;
    white-space: pre-line;
    line-height: 1.5;
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-success {
    border-left: 4px solid #22c55e;
}

.toast-error {
    border-left: 4px solid #ef4444;
}

.toast-info {
    border-left: 4px solid var(--color-primary);
}

/* =====================================================
   SIDEBAR TOGGLE (MOBILE)
   ===================================================== */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: var(--space-lg);
    left: var(--space-lg);
    z-index: 1001;
    background: var(--surface-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--transition-fast);
    align-items: center;
    justify-content: center;
}

.sidebar-toggle:hover {
    background: var(--surface-hover);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.sidebar-overlay.active {
    opacity: 1;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: calc(-1 * var(--sidebar-width));
        height: 100vh;
        width: var(--sidebar-width);
        z-index: 1000;
        transition: left var(--transition-normal);
    }

    .sidebar.open {
        left: 0;
    }

    .sidebar-toggle {
        display: flex;
    }

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

    .main-content {
        padding: var(--space-lg);
        padding-top: 60px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: min(var(--sidebar-width), 85vw);
        left: calc(-1 * min(var(--sidebar-width), 85vw));
    }

    .main-content {
        padding: var(--space-md);
        padding-top: 60px;
    }

    .toast-container {
        right: var(--space-md);
        left: var(--space-md);
        bottom: var(--space-md);
    }

    .toast {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .stat-card {
        padding: var(--space-sm);
    }

    .config-section {
        padding: var(--space-lg);
    }
}