/**
 * Web App Shell - Design System
 *
 * CSS Custom Properties (Design Tokens)
 * Based on 4px grid system
 *
 * @package WebAppTheme
 */

/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
    /* -------------------------------------------------------------------------
       Color Palette - Light Theme (Default)
       ------------------------------------------------------------------------- */

    /* Primary Brand */
    --primary: #6366F1;
    --primary-hover: #4F46E5;
    --primary-active: #4338CA;
    --primary-soft: #EEF2FF;
    --primary-soft-hover: #E0E7FF;

    /* Neutral Colors */
    --white: #FFFFFF;
    --black: #000000;

    /* Gray Scale */
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;

    /* Semantic Colors */
    --app-bg: var(--gray-50);
    --surface: var(--white);
    --surface-hover: var(--gray-50);
    --surface-active: var(--gray-100);

    /* Border Colors */
    --border: var(--gray-200);
    --border-subtle: var(--gray-100);
    --border-strong: var(--gray-300);

    /* Text Colors */
    --text: var(--gray-800);
    --text-secondary: var(--gray-600);
    --text-muted: var(--gray-500);
    --text-disabled: var(--gray-400);
    --text-inverse: var(--white);

    /* Status Colors */
    --success: #22C55E;
    --success-soft: #DCFCE7;
    --success-text: #166534;

    --warning: #F59E0B;
    --warning-soft: #FEF3C7;
    --warning-text: #92400E;

    --error: #EF4444;
    --error-soft: #FEE2E2;
    --error-text: #991B1B;

    --info: #3B82F6;
    --info-soft: #DBEAFE;
    --info-text: #1E40AF;

    /* Chart Colors (for data visualization) */
    --chart-1: #6366F1; /* Indigo - Primary */
    --chart-2: #F59E0B; /* Orange/Amber */
    --chart-3: #06B6D4; /* Cyan */
    --chart-4: #8B5CF6; /* Purple */
    --chart-5: #EC4899; /* Pink */

    /* -------------------------------------------------------------------------
       Layout Dimensions
       ------------------------------------------------------------------------- */

    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --sidebar-bg: var(--surface);
    --sidebar-border: var(--border);

    /* Topbar */
    --topbar-height: 64px;
    --topbar-bg: var(--surface);
    --topbar-border: var(--border);

    /* Content Area */
    --content-padding: 24px;
    --content-max-width: none;

    /* -------------------------------------------------------------------------
       Typography
       ------------------------------------------------------------------------- */

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

    /* Font Sizes - Based on 4px grid */
    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.8125rem;  /* 13px */
    --text-base: 0.875rem; /* 14px */
    --text-md: 1rem;       /* 16px */
    --text-lg: 1.125rem;   /* 18px */
    --text-xl: 1.25rem;    /* 20px */
    --text-2xl: 1.5rem;    /* 24px */
    --text-3xl: 1.875rem;  /* 30px */
    --text-4xl: 2.25rem;   /* 36px */

    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;

    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Letter Spacing */
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;

    /* -------------------------------------------------------------------------
       Spacing Scale (4px Grid)
       ------------------------------------------------------------------------- */

    --space-0: 0;
    --space-px: 1px;
    --space-0-5: 0.125rem;  /* 2px */
    --space-1: 0.25rem;     /* 4px */
    --space-1-5: 0.375rem;  /* 6px */
    --space-2: 0.5rem;      /* 8px */
    --space-2-5: 0.625rem;  /* 10px */
    --space-3: 0.75rem;     /* 12px */
    --space-3-5: 0.875rem;  /* 14px */
    --space-4: 1rem;        /* 16px */
    --space-5: 1.25rem;     /* 20px */
    --space-6: 1.5rem;      /* 24px */
    --space-7: 1.75rem;     /* 28px */
    --space-8: 2rem;        /* 32px */
    --space-9: 2.25rem;     /* 36px */
    --space-10: 2.5rem;     /* 40px */
    --space-11: 2.75rem;    /* 44px */
    --space-12: 3rem;       /* 48px */
    --space-14: 3.5rem;     /* 56px */
    --space-16: 4rem;       /* 64px */
    --space-20: 5rem;       /* 80px */
    --space-24: 6rem;       /* 96px */

    /* -------------------------------------------------------------------------
       Border Radius
       ------------------------------------------------------------------------- */

    --radius-none: 0;
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.375rem;  /* 6px */
    --radius-default: 0.5rem; /* 8px */
    --radius-lg: 0.75rem;   /* 12px */
    --radius-xl: 1rem;      /* 16px */
    --radius-2xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;

    /* -------------------------------------------------------------------------
       Shadows
       ------------------------------------------------------------------------- */

    --shadow-none: none;
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

    /* Card Shadow - Very subtle */
    --shadow-card: 0 1px 3px 0 rgb(0 0 0 / 0.04), 0 1px 2px -1px rgb(0 0 0 / 0.02);

    /* Focus Ring */
    --ring-offset: 2px;
    --ring-color: var(--primary);
    --ring-opacity: 0.5;

    /* -------------------------------------------------------------------------
       Transitions
       ------------------------------------------------------------------------- */

    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-slower: 500ms ease;

    /* Easing Functions */
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

    /* -------------------------------------------------------------------------
       Z-Index Scale
       ------------------------------------------------------------------------- */

    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-sidebar: 400;
    --z-topbar: 500;
    --z-modal-backdrop: 600;
    --z-modal: 700;
    --z-popover: 800;
    --z-tooltip: 900;
    --z-toast: 1000;
}

/* ==========================================================================
   Dark Theme
   ========================================================================== */

[data-theme="dark"],
.webapp-dark {
    /* Color Palette - Dark Theme */
    --app-bg: #0F172A;
    --surface: #1E293B;
    --surface-hover: #334155;
    --surface-active: #475569;

    /* Border Colors */
    --border: #334155;
    --border-subtle: #1E293B;
    --border-strong: #475569;

    /* Text Colors */
    --text: #F1F5F9;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    --text-disabled: #64748B;
    --text-inverse: #0F172A;

    /* Sidebar */
    --sidebar-bg: #1E293B;
    --sidebar-border: #334155;

    /* Topbar */
    --topbar-bg: #1E293B;
    --topbar-border: #334155;

    /* Shadows are more subtle in dark mode */
    --shadow-card: 0 1px 3px 0 rgb(0 0 0 / 0.2), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.3), 0 1px 2px -1px rgb(0 0 0 / 0.2);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.2);

    /* Status colors - softer in dark mode */
    --success-soft: rgba(34, 197, 94, 0.15);
    --warning-soft: rgba(245, 158, 11, 0.15);
    --error-soft: rgba(239, 68, 68, 0.15);
    --info-soft: rgba(59, 130, 246, 0.15);

    /* Primary soft for dark mode */
    --primary-soft: rgba(99, 102, 241, 0.15);
    --primary-soft-hover: rgba(99, 102, 241, 0.25);
}

/* Dark Mode Scrollbar */
[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--gray-600);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

[data-theme="dark"] * {
    scrollbar-color: var(--gray-600) transparent;
}

/* Dark Mode Selection */
[data-theme="dark"] ::selection {
    background: rgba(99, 102, 241, 0.3);
    color: var(--text);
}

/* System preference dark mode */
@media (prefers-color-scheme: dark) {
    [data-theme="system"] {
        --app-bg: #0F172A;
        --surface: #1E293B;
        --surface-hover: #334155;
        --surface-active: #475569;
        --border: #334155;
        --border-subtle: #1E293B;
        --border-strong: #475569;
        --text: #F1F5F9;
        --text-secondary: #CBD5E1;
        --text-muted: #94A3B8;
        --text-disabled: #64748B;
        --text-inverse: #0F172A;
        --sidebar-bg: #1E293B;
        --sidebar-border: #334155;
        --topbar-bg: #1E293B;
        --topbar-border: #334155;
        --shadow-card: 0 1px 3px 0 rgb(0 0 0 / 0.2), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    }
}

/* ==========================================================================
   Theme Transition Control
   ========================================================================== */

/*
 * Prevent theme transition animations during initial page load.
 * The 'webapp-theme-transitions' class is added after page load.
 */
html:not(.webapp-theme-transitions) *,
html:not(.webapp-theme-transitions) *::before,
html:not(.webapp-theme-transitions) *::after {
    transition-duration: 0s !important;
    transition-delay: 0s !important;
}

/* Enable smooth transitions for theme switching after page load */
.webapp-theme-transitions {
    /* Transition-enabled state */
}

.webapp-theme-transitions *,
.webapp-theme-transitions *::before,
.webapp-theme-transitions *::after {
    transition-property: color, background-color, border-color, box-shadow, fill, stroke;
    transition-duration: 0.2s;
    transition-timing-function: ease;
}

/* Exclude elements that shouldn't transition */
.webapp-theme-transitions .no-theme-transition,
.webapp-theme-transitions .no-theme-transition *,
.webapp-theme-transitions video,
.webapp-theme-transitions iframe {
    transition: none !important;
}

/* ==========================================================================
   Theme Toggle Button
   ========================================================================== */

.webapp-theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
}

.webapp-theme-toggle:hover {
    background-color: var(--surface-hover);
    color: var(--text);
}

.webapp-theme-toggle:active {
    transform: scale(0.92);
}

.webapp-theme-toggle:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Toggle icon container */
.webapp-theme-toggle-icon {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.25s ease, transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.webapp-theme-toggle-icon svg {
    width: 20px;
    height: 20px;
}

/* Sun icon - visible in dark mode (clicking will switch to light) */
.webapp-theme-toggle-sun {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

/* Moon icon - visible in light mode (clicking will switch to dark) */
.webapp-theme-toggle-moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Dark mode: show sun, hide moon */
[data-theme="dark"] .webapp-theme-toggle-sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="dark"] .webapp-theme-toggle-moon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

/* System preference dark mode toggle states */
@media (prefers-color-scheme: dark) {
    [data-theme="system"] .webapp-theme-toggle-sun {
        opacity: 1;
        transform: rotate(0deg) scale(1);
    }

    [data-theme="system"] .webapp-theme-toggle-moon {
        opacity: 0;
        transform: rotate(90deg) scale(0.5);
    }
}

/* Topbar integration - match other action buttons */
.webapp-topbar-actions .webapp-theme-toggle {
    margin-right: var(--space-1);
}

/* ==========================================================================
   Theme Toggle - Elementor Widget Styles
   ========================================================================== */

.webapp-theme-toggle-widget {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-family: inherit;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.webapp-theme-toggle-widget:hover {
    color: var(--text);
}

.webapp-theme-toggle-widget:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Icon visibility based on theme */
.webapp-theme-toggle-widget .webapp-icon-sun {
    display: flex;
}

.webapp-theme-toggle-widget .webapp-icon-moon {
    display: none;
}

[data-theme="dark"] .webapp-theme-toggle-widget .webapp-icon-sun {
    display: none;
}

[data-theme="dark"] .webapp-theme-toggle-widget .webapp-icon-moon {
    display: flex;
}

/* Text visibility based on theme */
.webapp-theme-toggle-widget .webapp-text-light {
    display: inline;
}

.webapp-theme-toggle-widget .webapp-text-dark {
    display: none;
}

[data-theme="dark"] .webapp-theme-toggle-widget .webapp-text-light {
    display: none;
}

[data-theme="dark"] .webapp-theme-toggle-widget .webapp-text-dark {
    display: inline;
}

/* Switch style toggle */
.webapp-theme-toggle-widget .webapp-switch-track {
    position: relative;
    width: 52px;
    height: 28px;
    background-color: var(--gray-200);
    border-radius: 14px;
    transition: background-color var(--transition-fast);
}

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

.webapp-theme-toggle-widget .webapp-switch-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.webapp-theme-toggle-widget .webapp-switch-thumb svg {
    width: 14px;
    height: 14px;
}

.webapp-theme-toggle-widget .webapp-switch-thumb .webapp-icon-sun {
    color: var(--warning);
}

.webapp-theme-toggle-widget .webapp-switch-thumb .webapp-icon-moon {
    color: var(--primary);
}

/* System preference dark mode support */
@media (prefers-color-scheme: dark) {
    [data-theme="system"] .webapp-theme-toggle-widget .webapp-icon-sun {
        display: none;
    }

    [data-theme="system"] .webapp-theme-toggle-widget .webapp-icon-moon {
        display: flex;
    }

    [data-theme="system"] .webapp-theme-toggle-widget .webapp-text-light {
        display: none;
    }

    [data-theme="system"] .webapp-theme-toggle-widget .webapp-text-dark {
        display: inline;
    }

    [data-theme="system"] .webapp-theme-toggle-widget .webapp-switch-track {
        background-color: var(--primary);
    }

    [data-theme="system"] .webapp-theme-toggle-widget .webapp-switch-thumb {
        transform: translateX(24px);
    }
}

/* ==========================================================================
   Dark Mode - Logo & Image Handling
   ========================================================================== */

/*
 * Logo dark mode handling
 * 1. Logo Swap: .webapp-logo-light and .webapp-logo-dark for different logos
 * 2. Logo Invert: .webapp-logo-invert applies CSS filter
 * 3. No Change: .webapp-logo-no-invert prevents any modifications
 */

/* Logo Swap - Show/hide logos based on theme */
.webapp-logo-light {
    display: inline-block;
}

.webapp-logo-dark {
    display: none;
}

[data-theme="dark"] .webapp-logo-light {
    display: none;
}

[data-theme="dark"] .webapp-logo-dark {
    display: inline-block;
}

/* System preference dark mode - logo swap */
@media (prefers-color-scheme: dark) {
    [data-theme="system"] .webapp-logo-light {
        display: none;
    }

    [data-theme="system"] .webapp-logo-dark {
        display: inline-block;
    }
}

/* Logo Invert - Apply filter for simple logo color inversion */
[data-theme="dark"] .webapp-logo-invert {
    filter: brightness(0) invert(1);
}

@media (prefers-color-scheme: dark) {
    [data-theme="system"] .webapp-logo-invert {
        filter: brightness(0) invert(1);
    }
}

/* Alternative: Slight brightness boost for dark logos */
[data-theme="dark"] .webapp-logo-brighten {
    filter: brightness(1.2);
}

/* Image handling - reduce brightness slightly for less eye strain */
[data-theme="dark"] .webapp-content img:not(.webapp-img-no-filter) {
    opacity: 0.92;
}

[data-theme="dark"] .webapp-content img:hover {
    opacity: 1;
}

/* Prevent filter on specific elements */
.webapp-img-no-filter,
.webapp-logo-no-invert {
    filter: none !important;
}

/* Dark mode image placeholder background */
[data-theme="dark"] .webapp-img-placeholder,
[data-theme="dark"] .elementor-widget-image .elementor-image-placeholder {
    background-color: var(--surface-hover);
}

/* ==========================================================================
   Base Reset & Defaults
   ========================================================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--text);
    background-color: var(--app-bg);
}

/* Remove default list styles */
ul, ol {
    list-style: none;
}

/* Links */
a {
    color: inherit;
    text-decoration: none;
}

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

/* Form elements */
button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    background: none;
    border: none;
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: var(--ring-offset);
}

/* Selection */
::selection {
    background-color: var(--primary-soft);
    color: var(--text);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--gray-300) transparent;
}

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

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-md { font-size: var(--text-md); }
.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); }

.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }

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

.p-0 { padding: var(--space-0); }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.m-0 { margin: var(--space-0); }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }

.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); }

.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); }

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

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

.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }
.flex-none { flex: none; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

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

.rounded-none { border-radius: var(--radius-none); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded { border-radius: var(--radius-default); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-none { box-shadow: var(--shadow-none); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-card); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.border { border: 1px solid var(--border); }
.border-subtle { border: 1px solid var(--border-subtle); }
.border-none { border: none; }

.bg-surface { background-color: var(--surface); }
.bg-app { background-color: var(--app-bg); }
.bg-primary { background-color: var(--primary); }
.bg-primary-soft { background-color: var(--primary-soft); }

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

.transition {
    transition-property: color, background-color, border-color, box-shadow, transform, opacity;
    transition-timing-function: var(--ease-in-out);
    transition-duration: 200ms;
}

.transition-fast { transition-duration: 150ms; }
.transition-slow { transition-duration: 300ms; }

/* ==========================================================================
   Screen Reader Only
   ========================================================================== */

.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;
}