/* ==========================================================================
   Smart Keyboard Converter AI — Professional Design System
   Crafted with restraint, accessibility, and purpose.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
    /* ---- Color Palette ---- */
    /* Primary accent — refined violet, used sparingly for CTAs & active states */
    --accent: hsl(245, 58%, 62%);
    --accent-hover: hsl(245, 58%, 56%);
    --accent-active: hsl(245, 58%, 50%);
    --accent-subtle: hsla(245, 58%, 62%, 0.10);
    --accent-glow: hsla(245, 58%, 62%, 0.18);

    /* Semantic status colors */
    --success: hsl(152, 56%, 42%);
    --success-subtle: hsla(152, 56%, 42%, 0.10);
    --success-text: hsl(152, 56%, 52%);

    --warning: hsl(38, 92%, 50%);
    --warning-subtle: hsla(38, 92%, 50%, 0.10);
    --warning-text: hsl(38, 92%, 60%);

    --error: hsl(0, 72%, 56%);
    --error-subtle: hsla(0, 72%, 56%, 0.10);
    --error-text: hsl(0, 72%, 66%);

    --info: hsl(210, 76%, 55%);
    --info-subtle: hsla(210, 76%, 55%, 0.10);
    --info-text: hsl(210, 76%, 65%);

    /* ---- Dark Theme (Default) ---- */
    --bg-app: hsl(220, 16%, 7%);
    --bg-app-secondary: hsl(220, 14%, 9%);
    --bg-sidebar: hsl(220, 14%, 9%);
    --bg-card: hsl(220, 14%, 11%);
    --bg-card-hover: hsl(220, 14%, 13%);
    --bg-elevated: hsl(220, 14%, 14%);
    --bg-input: hsl(220, 16%, 9%);
    --bg-input-hover: hsl(220, 14%, 11%);

    --border-primary: hsla(220, 14%, 22%, 0.50);
    --border-secondary: hsla(220, 14%, 18%, 0.40);
    --border-hover: hsla(220, 14%, 30%, 0.65);
    --border-focus: var(--accent);

    --text-primary: hsl(220, 14%, 93%);
    --text-secondary: hsl(220, 10%, 62%);
    --text-tertiary: hsl(220, 8%, 45%);
    --text-inverse: hsl(220, 16%, 7%);

    /* Skeleton loader */
    --skeleton-base: hsl(220, 14%, 14%);
    --skeleton-shine: hsl(220, 14%, 18%);

    /* ---- Elevation System ---- */
    --elevation-0: none;
    --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
    --elevation-2: 0 4px 14px rgba(0, 0, 0, 0.16), 0 1px 3px rgba(0, 0, 0, 0.08);
    --elevation-3: 0 12px 36px rgba(0, 0, 0, 0.24), 0 2px 6px rgba(0, 0, 0, 0.10);
    --elevation-4: 0 24px 64px rgba(0, 0, 0, 0.32);

    /* ---- Spacing Scale (8px base) ---- */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 32px;
    --space-8: 40px;
    --space-9: 48px;
    --space-10: 64px;

    /* ---- Border Radius ---- */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* ---- Typography ---- */
    --font-heading: 'Outfit', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;

    --text-xs: 0.6875rem;   /* 11px */
    --text-sm: 0.8125rem;   /* 13px */
    --text-base: 0.9375rem; /* 15px */
    --text-lg: 1.0625rem;   /* 17px */
    --text-xl: 1.25rem;     /* 20px */
    --text-2xl: 1.5rem;     /* 24px */
    --text-3xl: 1.875rem;   /* 30px */
    --text-display: 2.75rem; /* 44px */

    --leading-tight: 1.2;
    --leading-normal: 1.5;
    --leading-relaxed: 1.65;

    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.04em;

    /* ---- Layout Dimensions ---- */
    --sidebar-width: 260px;
    --header-height: 64px;

    /* ---- Motion ---- */
    --duration-fast: 0.15s;
    --duration-normal: 0.25s;
    --duration-slow: 0.4s;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);

    /* ---- Focus Ring ---- */
    --focus-ring: 0 0 0 2px var(--bg-app), 0 0 0 4px var(--accent);
}

/* --------------------------------------------------------------------------
   2. LIGHT THEME OVERRIDES
   -------------------------------------------------------------------------- */
.light-theme {
    --bg-app: hsl(220, 20%, 97%);
    --bg-app-secondary: hsl(220, 18%, 95%);
    --bg-sidebar: hsl(0, 0%, 100%);
    --bg-card: hsl(0, 0%, 100%);
    --bg-card-hover: hsl(220, 20%, 98%);
    --bg-elevated: hsl(0, 0%, 100%);
    --bg-input: hsl(220, 18%, 96%);
    --bg-input-hover: hsl(220, 18%, 93%);

    --border-primary: hsl(220, 14%, 88%);
    --border-secondary: hsl(220, 14%, 91%);
    --border-hover: hsl(220, 14%, 78%);

    --text-primary: hsl(220, 18%, 13%);
    --text-secondary: hsl(220, 10%, 44%);
    --text-tertiary: hsl(220, 8%, 62%);
    --text-inverse: hsl(0, 0%, 100%);

    --accent: hsl(245, 55%, 55%);
    --accent-hover: hsl(245, 55%, 48%);
    --accent-active: hsl(245, 55%, 42%);
    --accent-subtle: hsla(245, 55%, 55%, 0.08);
    --accent-glow: hsla(245, 55%, 55%, 0.12);

    --success-text: hsl(152, 56%, 36%);
    --warning-text: hsl(38, 80%, 38%);
    --error-text: hsl(0, 72%, 48%);
    --info-text: hsl(210, 76%, 45%);

    --skeleton-base: hsl(220, 14%, 92%);
    --skeleton-shine: hsl(220, 14%, 96%);

    --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
    --elevation-2: 0 4px 14px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.03);
    --elevation-3: 0 12px 36px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.03);
    --elevation-4: 0 24px 64px rgba(0, 0, 0, 0.12);

    --focus-ring: 0 0 0 2px var(--bg-card), 0 0 0 4px var(--accent);
}

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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-app);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    transition: background-color var(--duration-normal) var(--ease-out),
                color var(--duration-normal) var(--ease-out);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    line-height: var(--leading-tight);
    color: var(--text-primary);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--duration-fast);
}

a:hover {
    color: var(--accent-hover);
}

/* --------------------------------------------------------------------------
   4. SCROLLBARS
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-primary) transparent;
}

/* --------------------------------------------------------------------------
   5. SKIP-TO-CONTENT (Accessibility)
   -------------------------------------------------------------------------- */
.skip-link {
    position: absolute;
    left: -9999px;
    top: var(--space-2);
    z-index: 999;
    background: var(--accent);
    color: #fff;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--text-sm);
}

.skip-link:focus {
    left: var(--space-4);
}

/* --------------------------------------------------------------------------
   6. APP LAYOUT
   -------------------------------------------------------------------------- */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   7. SIDEBAR
   -------------------------------------------------------------------------- */
.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-secondary);
    display: flex;
    flex-direction: column;
    padding: var(--space-6) var(--space-5);
    flex-shrink: 0;
    z-index: 40;
    transition: background-color var(--duration-normal) var(--ease-out),
                border-color var(--duration-normal) var(--ease-out);
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
    padding: 0 var(--space-2);
}

.logo-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

/* Sidebar section labels */
.nav-section-label {
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    padding: var(--space-5) var(--space-3) var(--space-2);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3);
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: var(--text-sm);
    border: 1px solid transparent;
    transition: all var(--duration-fast) var(--ease-out);
    cursor: pointer;
}

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

.nav-item.active {
    color: var(--text-primary);
    background-color: var(--accent-subtle);
    border-color: var(--accent-glow);
    font-weight: 600;
}

.nav-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
    opacity: 0.75;
}

.nav-item.active .nav-icon {
    opacity: 1;
}

.nav-label {
    white-space: nowrap;
}

/* Sidebar Footer */
.sidebar-footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    padding-top: var(--space-5);
}

/* Theme Switcher */
.theme-switch-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    background-color: var(--bg-input);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-secondary);
}

.theme-icon {
    font-size: 14px;
    color: var(--text-tertiary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 22px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--border-primary);
    transition: background-color var(--duration-fast) var(--ease-out);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: #fff;
    transition: transform var(--duration-fast) var(--ease-out);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

input:checked + .slider {
    background-color: var(--accent);
}

input:checked + .slider:before {
    transform: translateX(18px);
}

input:focus-visible + .slider {
    box-shadow: var(--focus-ring);
}

.slider.round { border-radius: var(--radius-full); }
.slider.round:before { border-radius: 50%; }

/* User profile block in sidebar */
.user-profile-summary {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    border-top: 1px solid var(--border-secondary);
    padding-top: var(--space-5);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background-color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 1px;
    overflow: hidden;
    flex-grow: 1;
    min-width: 0;
}

.user-name {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.user-email {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-logout-sidebar {
    background: none;
    border: none;
    color: var(--error-text);
    cursor: pointer;
    font-size: var(--text-xs);
    font-weight: 600;
    text-align: left;
    padding: 2px 0;
    transition: color var(--duration-fast);
}

.btn-logout-sidebar:hover {
    color: var(--error);
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   8. MAIN WORKSPACE
   -------------------------------------------------------------------------- */
.app-main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* Top Header */
.app-header {
    height: var(--header-height);
    min-height: var(--header-height);
    border-bottom: 1px solid var(--border-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-7);
    background-color: var(--bg-sidebar);
    gap: var(--space-4);
    transition: background-color var(--duration-normal) var(--ease-out),
                border-color var(--duration-normal) var(--ease-out);
}

.header-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.mobile-menu-toggle {
    display: none;
    font-size: 22px;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: background-color var(--duration-fast);
}

.mobile-menu-toggle:hover {
    background-color: var(--accent-subtle);
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

/* --------------------------------------------------------------------------
   9. VIEW CONTENT
   -------------------------------------------------------------------------- */
.view-content {
    flex-grow: 1;
    padding: var(--space-7);
    overflow-y: auto;
}

.app-view {
    width: 100%;
    max-width: 1200px;
    animation: viewEnter var(--duration-normal) var(--ease-out);
}

@keyframes viewEnter {
    from { opacity: 0; }
    to { opacity: 1; }
}

.hidden {
    display: none !important;
}

/* --------------------------------------------------------------------------
   10. CARDS
   -------------------------------------------------------------------------- */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--elevation-1);
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out),
                background-color var(--duration-normal) var(--ease-out);
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--elevation-2);
}

/* --------------------------------------------------------------------------
   11. BUTTONS
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--text-sm);
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--duration-fast) var(--ease-out);
    gap: var(--space-2);
    line-height: 1;
    white-space: nowrap;
    text-decoration: none;
    font-family: var(--font-body);
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.btn:disabled,
.btn.btn-disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

/* Primary — solid accent */
.btn-primary {
    background-color: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-primary:active {
    background-color: var(--accent-active);
    border-color: var(--accent-active);
}

/* Secondary — outlined / low emphasis */
.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-primary);
}

.btn-secondary:hover {
    background-color: var(--accent-subtle);
    border-color: var(--border-hover);
}

.btn-secondary:active {
    background-color: var(--accent-glow);
}

/* Destructive */
.btn-danger {
    background-color: var(--error-subtle);
    color: var(--error-text);
    border-color: transparent;
}

.btn-danger:hover {
    background-color: var(--error);
    color: #fff;
}

.btn-danger:active {
    background-color: hsl(0, 72%, 48%);
    color: #fff;
}

/* Ghost — minimal footprint */
.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    padding: var(--space-2) var(--space-3);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background-color: var(--accent-subtle);
}

/* Button sizes */
.btn-large {
    padding: var(--space-4) var(--space-7);
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
}

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

.btn-full {
    width: 100%;
}

/* Button loading state */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.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: btnSpin 0.6s linear infinite;
}

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

/* OAuth button */
.btn-oauth {
    background-color: #fff;
    color: hsl(220, 18%, 13%);
    border: 1px solid hsl(220, 14%, 88%);
}

.btn-oauth:hover {
    background-color: hsl(220, 18%, 96%);
    border-color: hsl(220, 14%, 78%);
}

.oauth-icon {
    font-size: 18px;
}

/* --------------------------------------------------------------------------
   12. FORM CONTROLS
   -------------------------------------------------------------------------- */
.form-input,
.form-select,
.board-textarea {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-family: var(--font-body);
    outline: none;
    transition: border-color var(--duration-fast),
                box-shadow var(--duration-fast),
                background-color var(--duration-fast);
}

.form-select option {
    background-color: var(--bg-sidebar);
    color: var(--text-primary);
}

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

.form-input:hover,
.form-select:hover,
.board-textarea:hover {
    border-color: var(--border-hover);
    background-color: var(--bg-input-hover);
}

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

/* Validation states */
.form-input.error {
    border-color: var(--error);
    box-shadow: 0 0 0 3px var(--error-subtle);
}

.form-input.success {
    border-color: var(--success);
    box-shadow: 0 0 0 3px var(--success-subtle);
}

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

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

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

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.control-group label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.control-group-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-5);
}

/* Range slider */
.form-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--border-primary);
    border-radius: var(--radius-full);
    outline: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-card);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: transform var(--duration-fast);
}

.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-card);
}

/* Checkbox */
.checkbox-container {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-container input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   13. UTILITY CLASSES
   -------------------------------------------------------------------------- */
.margin-top-sm { margin-top: var(--space-4); }
.margin-top-md { margin-top: var(--space-6); }
.margin-top-lg { margin-top: var(--space-7); }
.margin-top-xl { margin-top: var(--space-9); }

.gradient-text {
    background: linear-gradient(135deg, var(--accent), hsl(280, 70%, 58%));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --------------------------------------------------------------------------
   14. LANDING / HERO
   -------------------------------------------------------------------------- */
.hero-section {
    text-align: center;
    max-width: 720px;
    margin: var(--space-10) auto var(--space-10) auto;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: var(--text-display);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.04em;
    margin-bottom: var(--space-6);
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-8);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-ctas {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}

.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-7) var(--space-6);
    text-align: center;
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
}

.feature-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--elevation-2);
}

.feature-icon {
    font-size: 36px;
    margin-bottom: var(--space-4);
    display: inline-block;
}

.feature-card h3 {
    font-size: var(--text-base);
    margin-bottom: var(--space-2);
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

/* --------------------------------------------------------------------------
   15. CONVERTER VIEW
   -------------------------------------------------------------------------- */
.converter-layout {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.converter-controls-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

.mode-toggles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-3);
}

.mode-btn {
    background-color: var(--bg-input);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.mode-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background-color: var(--bg-input-hover);
}

.mode-btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.mode-btn.active {
    background-color: var(--accent-subtle);
    border-color: var(--accent);
    color: var(--text-primary);
}

.mode-btn.active .mode-label {
    color: var(--text-primary);
}

.mode-btn.active .mode-num {
    color: var(--accent);
}

.mode-btn.disabled,
.mode-btn[disabled] {
    opacity: 0.4;
    cursor: not-allowed;
}

.mode-num {
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
}

.mode-label {
    font-size: var(--text-sm);
    font-weight: 600;
}

/* AI warning */
.ai-disabled-warning {
    background: var(--warning-subtle);
    border: 1px solid hsla(38, 92%, 50%, 0.2);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    color: var(--warning-text);
    font-size: var(--text-sm);
    margin-top: var(--space-4);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* AI settings panel */
.ai-settings-panel {
    background-color: var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px dashed var(--border-primary);
    animation: fadeIn var(--duration-normal) var(--ease-out);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.subpanel-title {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 700;
    margin-bottom: var(--space-5);
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

/* Typing boards */
.typing-boards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-6);
}

.board-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    min-height: 280px;
}

.board-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-secondary);
}

.board-header h3 {
    font-size: var(--text-base);
    font-weight: 700;
}

.char-counter,
.direction-badge {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-tertiary);
}

.direction-badge {
    background-color: var(--bg-input);
    padding: 2px var(--space-2);
    border-radius: var(--radius-sm);
    font-weight: 700;
    border: 1px solid var(--border-secondary);
    letter-spacing: 0.04em;
    font-size: 10px;
}

.board-textarea {
    flex-grow: 1;
    resize: none;
    min-height: 140px;
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
}

.board-output-display {
    flex-grow: 1;
    background-color: var(--bg-input);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    min-height: 140px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-word;
    transition: border-color var(--duration-fast);
}

.board-output-display.active-glow {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.placeholder-text {
    color: var(--text-tertiary);
    font-style: normal;
}

.board-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
}

.ai-status-loader {
    font-size: var(--text-xs);
    color: var(--accent);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.ai-status-loader::before {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 2px solid var(--accent-glow);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: btnSpin 0.6s linear infinite;
}

/* --------------------------------------------------------------------------
   16. MODALS
   -------------------------------------------------------------------------- */
.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: modalFadeIn var(--duration-fast) var(--ease-out);
    padding: var(--space-4);
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-card {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 440px;
    box-shadow: var(--elevation-4);
    display: flex;
    flex-direction: column;
    animation: modalSlideIn var(--duration-normal) var(--ease-out);
    overflow: hidden;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: scale(0.97); }
    to { opacity: 1; transform: scale(1); }
}

.modal-card-large {
    max-width: 660px;
    max-height: 85vh;
}

.modal-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--border-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: var(--text-xl);
    font-weight: 700;
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: color var(--duration-fast), background-color var(--duration-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.modal-close-btn:hover {
    color: var(--text-primary);
    background-color: var(--accent-subtle);
}

.modal-close-btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.modal-body {
    padding: var(--space-6);
}

.scrollable-modal-body {
    overflow-y: auto;
    max-height: 55vh;
    padding-right: var(--space-4);
}

/* Auth divider */
.auth-divider {
    text-align: center;
    margin: var(--space-6) 0;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    color: var(--text-tertiary);
    position: relative;
}

.auth-divider:before,
.auth-divider:after {
    content: "";
    height: 1px;
    background-color: var(--border-secondary);
    position: absolute;
    top: 50%;
    width: 28%;
}

.auth-divider:before { left: 0; }
.auth-divider:after { right: 0; }

.modal-footer-text {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    text-align: center;
}

.auth-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.auth-link:hover {
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   17. TOAST NOTIFICATIONS
   -------------------------------------------------------------------------- */
.toast-container {
    position: fixed;
    bottom: var(--space-7);
    right: var(--space-7);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    z-index: 200;
    max-width: 380px;
}

.toast {
    background-color: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-5);
    color: var(--text-primary);
    box-shadow: var(--elevation-3);
    font-size: var(--text-sm);
    font-weight: 500;
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    animation: toastSlideIn var(--duration-normal) var(--ease-out);
    border-left: 3px solid transparent;
    line-height: var(--leading-normal);
}

@keyframes toastSlideIn {
    from { opacity: 0; transform: translateX(24px); }
    to { opacity: 1; transform: translateX(0); }
}

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

/* --------------------------------------------------------------------------
   18. LAYOUT EDITOR
   -------------------------------------------------------------------------- */
.editor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    gap: var(--space-4);
}

.editor-card {
    max-width: 900px;
    margin: 0 auto;
}

.mapping-editor-section {
    margin-top: var(--space-2);
}

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

.mapping-table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
}

.mapping-editor-table {
    width: 100%;
    border-collapse: collapse;
}

.mapping-editor-table th,
.mapping-editor-table td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border-secondary);
    text-align: left;
}

.mapping-editor-table th {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    color: var(--text-secondary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    background-color: var(--bg-elevated);
    position: sticky;
    top: 0;
}

.mapping-editor-table tr:nth-child(even) td {
    background-color: hsla(220, 14%, 11%, 0.3);
}

.light-theme .mapping-editor-table tr:nth-child(even) td {
    background-color: hsla(220, 14%, 95%, 0.5);
}

.mapping-editor-table tr:hover td {
    background-color: var(--accent-subtle);
}

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

.editor-form-buttons {
    display: flex;
    gap: var(--space-3);
}

.section-tip {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

/* --------------------------------------------------------------------------
   19. HISTORY VIEW
   -------------------------------------------------------------------------- */
.history-actions-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    gap: var(--space-4);
}

.history-table-card {
    padding: 0;
    overflow: hidden;
}

.table-wrapper {
    overflow-x: auto;
    width: 100%;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
}

.history-table th,
.history-table td {
    padding: var(--space-4) var(--space-6);
    text-align: left;
    border-bottom: 1px solid var(--border-secondary);
    font-size: var(--text-sm);
}

.history-table th {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    background-color: var(--bg-elevated);
    position: sticky;
    top: 0;
    z-index: 1;
}

.history-table tr:hover td {
    background-color: var(--accent-subtle);
}

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

/* --------------------------------------------------------------------------
   20. LAYOUT CARDS (My Layouts + Marketplace)
   -------------------------------------------------------------------------- */
.layouts-manager-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    gap: var(--space-4);
}

.layouts-actions {
    display: flex;
    gap: var(--space-3);
}

.layouts-grid,
.marketplace-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-5);
    margin-top: var(--space-5);
}

.layout-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
    position: relative;
}

.layout-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--elevation-2);
}

.layout-card h3 {
    font-size: var(--text-base);
    font-weight: 700;
}

.card-meta-line {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* Badges */
.badge {
    background-color: var(--bg-input);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-sm);
    padding: 2px var(--space-2);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.badge.success {
    background-color: var(--success-subtle);
    border-color: hsla(152, 56%, 42%, 0.2);
    color: var(--success-text);
}

.badge.danger {
    background-color: var(--error-subtle);
    border-color: hsla(0, 72%, 56%, 0.2);
    color: var(--error-text);
}

/* Semantic colored badges for marketplace */
.badge-lang {
    background-color: var(--accent-subtle) !important;
    border-color: var(--accent-glow) !important;
    color: var(--accent) !important;
}

.badge-dl {
    background-color: hsla(280, 70%, 58%, 0.08) !important;
    border-color: hsla(280, 70%, 58%, 0.15) !important;
    color: hsl(280, 70%, 62%) !important;
}

.badge-likes {
    background-color: var(--error-subtle) !important;
    border-color: hsla(0, 72%, 56%, 0.15) !important;
    color: var(--error-text) !important;
}

.badge-rating {
    background-color: var(--warning-subtle) !important;
    border-color: hsla(38, 92%, 50%, 0.18) !important;
    color: var(--warning-text) !important;
}

.badge-creator {
    background-color: hsla(172, 60%, 45%, 0.08) !important;
    border-color: hsla(172, 60%, 45%, 0.18) !important;
    color: hsl(172, 60%, 50%) !important;
}

.light-theme .badge-dl { color: hsl(280, 60%, 42%) !important; }
.light-theme .badge-likes { color: hsl(0, 60%, 42%) !important; }
.light-theme .badge-rating { color: hsl(38, 72%, 36%) !important; }
.light-theme .badge-creator { color: hsl(172, 50%, 34%) !important; }

.layout-card p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-normal);
    flex-grow: 1;
}

.card-footer-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: auto;
    border-top: 1px solid var(--border-secondary);
    padding-top: var(--space-4);
    width: 100%;
}

.card-footer-actions .btn {
    flex: 1 1 calc(50% - var(--space-2));
    min-width: 70px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    justify-content: center;
}

.card-creator-line {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* --------------------------------------------------------------------------
   21. MARKETPLACE SEARCH BAR
   -------------------------------------------------------------------------- */
.marketplace-search-bar {
    display: flex;
    gap: var(--space-4);
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    flex-wrap: wrap;
    box-shadow: var(--elevation-1);
}

.marketplace-search-bar .search-input-wrapper {
    flex: 1 1 300px;
    position: relative;
    display: flex;
    align-items: center;
}

.marketplace-search-bar .search-icon {
    position: absolute;
    left: var(--space-4);
    font-size: 14px;
    opacity: 0.5;
    pointer-events: none;
}

.marketplace-search-bar .form-input {
    width: 100%;
    padding-left: var(--space-9);
    height: 42px;
    font-size: var(--text-sm);
}

.marketplace-search-bar .filters-wrapper {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.marketplace-search-bar .form-select {
    height: 42px;
    min-width: 150px;
    padding: 0 var(--space-4);
    font-size: var(--text-sm);
}

/* --------------------------------------------------------------------------
   22. STAR RATING
   -------------------------------------------------------------------------- */
.stars-container {
    display: flex;
    gap: var(--space-2);
}

.star-item {
    font-size: 28px;
    cursor: pointer;
    color: var(--border-primary);
    transition: color var(--duration-fast), transform var(--duration-fast);
    user-select: none;
}

.star-item:hover {
    transform: scale(1.15);
}

.star-item.active,
.star-item.hovered {
    color: var(--warning);
}

.stars-container:hover .star-item {
    color: var(--border-primary);
}

.stars-container:hover .star-item:hover,
.stars-container:hover .star-item.hovered {
    color: var(--warning);
}

/* --------------------------------------------------------------------------
   23. COMMENTS
   -------------------------------------------------------------------------- */
.comments-section h4,
.ratings-submission-section h4 {
    font-size: var(--text-base);
    font-weight: 700;
}

.comment-input-block {
    display: flex;
    gap: var(--space-3);
}

.comment-input-block .form-input {
    flex-grow: 1;
}

.comments-feed-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.comment-item {
    background-color: var(--bg-input);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    transition: background-color var(--duration-fast);
}

.comment-item:hover {
    background-color: var(--bg-input-hover);
}

.comment-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    margin-bottom: var(--space-2);
}

.comment-author {
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: var(--text-sm);
}

.comment-content {
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    word-break: break-word;
    overflow-wrap: break-word;
    white-space: pre-wrap;
}

/* --------------------------------------------------------------------------
   24. MARKETPLACE DETAIL MODAL
   -------------------------------------------------------------------------- */
.layout-detail-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    background: var(--bg-input);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-bottom: var(--space-5);
}

.layout-description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--text-primary);
}

.detail-stats-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.detail-stats-badges .badge {
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    border-radius: var(--radius-sm);
}

.detail-action-buttons {
    display: flex;
    gap: var(--space-3);
}

.ratings-submission-section {
    background: var(--bg-input);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

/* --------------------------------------------------------------------------
   25. PROFILE VIEW
   -------------------------------------------------------------------------- */
.profile-layout-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: var(--space-7);
}

.profile-card {
    margin-bottom: 0;
}

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

.stat-box {
    background-color: var(--bg-input);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-5) var(--space-4);
    text-align: center;
    transition: border-color var(--duration-fast);
}

.stat-box:hover {
    border-color: var(--accent-glow);
}

.stat-num {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--accent);
}

.stat-label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: var(--space-1);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.form-divider {
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-tertiary);
    border-bottom: 1px dashed var(--border-secondary);
    padding-bottom: var(--space-2);
    margin: var(--space-7) 0 var(--space-5) 0;
    letter-spacing: var(--tracking-wide);
}

.favorites-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

/* --------------------------------------------------------------------------
   26. FILE UPLOAD
   -------------------------------------------------------------------------- */
.file-upload-wrapper {
    position: relative;
    width: 100%;
    border: 2px dashed var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-6) var(--space-5);
    text-align: center;
    background: var(--bg-input);
    transition: border-color var(--duration-fast),
                background-color var(--duration-fast);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-1);
}

.file-upload-wrapper:hover {
    border-color: var(--accent);
    background-color: var(--accent-subtle);
}

.file-upload-wrapper input[type="file"] {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-upload-icon {
    font-size: 28px;
    opacity: 0.7;
}

.file-upload-text {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    pointer-events: none;
}

.file-upload-name {
    color: var(--accent) !important;
    font-weight: 600;
}

.import-textarea {
    width: 100%;
    min-height: 100px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-family: 'Fira Code', 'Courier New', Courier, monospace;
    outline: none;
    resize: vertical;
    transition: border-color var(--duration-fast),
                box-shadow var(--duration-fast);
}

.import-textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* --------------------------------------------------------------------------
   27. SKELETON LOADERS
   -------------------------------------------------------------------------- */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--skeleton-base) 25%,
        var(--skeleton-shine) 50%,
        var(--skeleton-base) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite ease-in-out;
    border-radius: var(--radius-sm);
}

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

.skeleton-text {
    height: 14px;
    margin-bottom: var(--space-2);
}

.skeleton-text-lg {
    height: 20px;
    width: 60%;
    margin-bottom: var(--space-3);
}

.skeleton-card {
    height: 200px;
    border-radius: var(--radius-lg);
}

.skeleton-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------------
   28. EMPTY STATES
   -------------------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: var(--space-10) var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.empty-state-icon {
    font-size: 48px;
    opacity: 0.3;
    margin-bottom: var(--space-4);
}

.empty-state-title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.empty-state-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    max-width: 320px;
    line-height: var(--leading-relaxed);
}

/* --------------------------------------------------------------------------
   29. RESPONSIVE DESIGN
   -------------------------------------------------------------------------- */

/* Sidebar backdrop for mobile */
.sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 39;
    animation: modalFadeIn var(--duration-fast) var(--ease-out);
}

.sidebar-backdrop.visible {
    display: block;
}

@media (max-width: 1024px) {
    .profile-layout-grid {
        grid-template-columns: 1fr;
    }

    .view-content {
        padding: var(--space-6);
    }
}

@media (max-width: 768px) {
    .app-sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        width: var(--sidebar-width);
        height: 100vh;
        z-index: 50;
        transition: left var(--duration-normal) var(--ease-out);
        border-right: 1px solid var(--border-secondary);
        box-shadow: var(--elevation-3);
    }

    .app-sidebar.open {
        left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .view-content {
        padding: var(--space-5);
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-subtitle {
        font-size: var(--text-base);
    }

    .hero-ctas {
        flex-direction: column;
    }

    .typing-boards-container {
        grid-template-columns: 1fr;
    }

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

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

    .layouts-grid,
    .marketplace-grid {
        grid-template-columns: 1fr;
    }

    .app-header {
        padding: 0 var(--space-5);
    }

    .header-title {
        font-size: var(--text-lg);
    }

    .toast-container {
        left: var(--space-4);
        right: var(--space-4);
        bottom: var(--space-5);
        max-width: none;
    }

    .layouts-manager-header {
        flex-direction: column;
        align-items: stretch;
    }

    .layouts-actions {
        justify-content: stretch;
    }

    .layouts-actions .btn {
        flex: 1;
    }

    .marketplace-search-bar {
        flex-direction: column;
    }

    .marketplace-search-bar .filters-wrapper {
        width: 100%;
    }

    .marketplace-search-bar .form-select {
        flex: 1;
    }

    .editor-header {
        flex-direction: column;
        align-items: stretch;
    }

    .detail-action-buttons {
        flex-direction: column;
    }

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

@media (max-width: 480px) {
    .card-footer-actions .btn {
        flex: 1 1 100%;
    }

    .header-actions .btn {
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }
}

/* --------------------------------------------------------------------------
   30. REDUCED MOTION
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* --------------------------------------------------------------------------
   31. PRINT STYLES (optional)
   -------------------------------------------------------------------------- */
@media print {
    .app-sidebar,
    .app-header,
    .toast-container,
    .modal-overlay {
        display: none !important;
    }

    .app-main {
        overflow: visible;
    }

    .view-content {
        padding: 0;
    }
}