/**
 * Jump Rope Fitness - Design System
 * Based on provided design kit
 */

:root {
    /* ===== COLORS ===== */

    /* Primary Colors */
    --color-cyan: #00BCD4;           /* Main brand color - buttons, highlights */
    --color-cyan-light: #4DD0E1;     /* Lighter cyan for hover states */
    --color-cyan-dark: #0097A7;      /* Darker cyan for active states */

    /* Secondary Colors */
    --color-orange: #FF9800;         /* Orange accent - warnings, highlights */
    --color-orange-light: #FFB74D;
    --color-orange-dark: #F57C00;

    /* Neutrals */
    --color-trottles: #263238;       /* Dark gray/black for text */
    --color-gray-light: #ECEFF1;     /* Light gray backgrounds */
    --color-gray-medium: #B0BEC5;    /* Medium gray for borders */
    --color-gray-dark: #546E7A;      /* Dark gray for secondary text */

    /* Background */
    --color-bg-primary: #FFFFFF;     /* White cards/surfaces */
    --color-bg-secondary: #F5F7FA;   /* Light gray page background */
    --color-bg-cyan-light: #E0F7FA;  /* Very light cyan for sections */

    /* State Colors */
    --color-success: #4CAF50;        /* Green for success states */
    --color-warning: #FF9800;        /* Orange for warnings */
    --color-error: #F44336;          /* Red for errors */
    --color-info: #2196F3;           /* Blue for info */

    /* Text Colors */
    --color-text-primary: #263238;   /* Main text color */
    --color-text-secondary: #546E7A; /* Secondary text */
    --color-text-disabled: #B0BEC5;  /* Disabled text */
    --color-text-white: #FFFFFF;     /* White text on dark backgrounds */

    /* Border Colors */
    --color-border: #ECEFF1;         /* Default border color */
    --color-border-light: #F5F7FA;   /* Lighter borders */
    --color-border-dark: #B0BEC5;    /* Darker borders */

    /* Dark Mode Variables (light mode defaults) */
    --dm-bg-page: #F5F7FA;
    --dm-bg-card: #FFFFFF;
    --dm-bg-elevated: #FFFFFF;
    --dm-text-primary: #263238;
    --dm-text-secondary: #546E7A;
    --dm-text-muted: #B0BEC5;
    --dm-border: #ECEFF1;
    --dm-border-light: #F5F7FA;
    --dm-shadow: rgba(0, 0, 0, 0.1);
    --dm-input-bg: #FFFFFF;
    --dm-hover-bg: #F5F7FA;

    /* ===== TYPOGRAPHY ===== */

    /* Font Families */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-monospace: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;

    /* Font Sizes */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 48px;
    --font-size-5xl: 64px;
    --font-size-jumbo: 120px;        /* For jump counter */

    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 900;

    /* Line Heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* ===== SPACING ===== */

    /* Base unit: 8px */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --space-12: 96px;

    /* Semantic Spacing */
    --spacing-xs: var(--space-1);    /* 8px */
    --spacing-sm: var(--space-2);    /* 16px */
    --spacing-md: var(--space-3);    /* 24px */
    --spacing-lg: var(--space-4);    /* 32px */
    --spacing-xl: var(--space-5);    /* 40px */
    --spacing-2xl: var(--space-6);   /* 48px */
    --spacing-3xl: var(--space-8);   /* 64px */

    /* ===== BORDER RADIUS ===== */

    --radius-sm: 8px;                /* Small cards, inputs */
    --radius-md: 12px;               /* Medium cards */
    --radius-lg: 16px;               /* Large cards */
    --radius-xl: 24px;               /* Extra large cards */
    --radius-pill: 9999px;           /* Pills/tags/buttons */
    --radius-circle: 50%;            /* Circular elements */

    /* ===== SHADOWS ===== */

    /* Trim (subtle) */
    --shadow-trim: 0 1px 3px rgba(0, 0, 0, 0.08);

    /* Log (medium) */
    --shadow-log: 0 4px 12px rgba(0, 0, 0, 0.12);

    /* Log (strong) */
    --shadow-log-strong: 0 8px 24px rgba(0, 0, 0, 0.15);

    /* Card hover effect */
    --shadow-hover: 0 12px 32px rgba(0, 188, 212, 0.2);

    /* ===== TRANSITIONS ===== */

    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* ===== Z-INDEX ===== */

    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ===== DARK MODE - WCAG AA Compliant ===== */
[data-theme="dark"] {
    /* Background colors */
    --color-bg-primary: #1f2937;
    --color-bg-secondary: #111827;
    --color-bg-cyan-light: #1e3a4c;
    --color-gray-light: #374151;
    --color-gray-medium: #6b7280;
    --color-gray-dark: #d1d5db;

    /* Text colors - WCAG AA compliant (4.5:1+ contrast) */
    --color-text-primary: #f9fafb;      /* 15.8:1 on #1f2937 */
    --color-text-secondary: #d1d5db;    /* 10.9:1 on #1f2937 */
    --color-text-disabled: #9ca3af;     /* 5.7:1 on #1f2937 */

    /* Border colors - visible in dark mode */
    --color-border: #4b5563;
    --color-border-light: #374151;
    --color-border-dark: #6b7280;

    /* Dark Mode semantic variables */
    --dm-bg-page: #111827;
    --dm-bg-card: #1f2937;
    --dm-bg-elevated: #374151;
    --dm-text-primary: #f9fafb;
    --dm-text-secondary: #d1d5db;
    --dm-text-muted: #9ca3af;
    --dm-border: #4b5563;
    --dm-border-light: #374151;
    --dm-shadow: rgba(0, 0, 0, 0.5);
    --dm-input-bg: #374151;
    --dm-hover-bg: #4b5563;
}

/* Apply dark mode to body and cards */
[data-theme="dark"] body {
    background-color: var(--dm-bg-page);
    color: var(--dm-text-primary);
}

[data-theme="dark"] .card,
[data-theme="dark"] .modal-content {
    background-color: var(--dm-bg-card);
    border-color: var(--dm-border);
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
    background-color: var(--dm-input-bg);
    color: var(--dm-text-primary);
    border-color: var(--dm-border);
}

[data-theme="dark"] input::placeholder {
    color: var(--dm-text-muted);
}

/* Dark mode focus states - high visibility */
[data-theme="dark"] input:focus,
[data-theme="dark"] select:focus,
[data-theme="dark"] textarea:focus {
    border-color: var(--color-cyan);
    box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.3);
    outline: none;
}

/* Dark mode buttons */
[data-theme="dark"] .btn-secondary {
    color: var(--color-cyan-light);
    border-color: var(--color-cyan-light);
}

[data-theme="dark"] .btn-secondary:hover:not(:disabled) {
    background-color: var(--color-cyan);
    color: #ffffff;
}

/* Dark mode chips/tags */
[data-theme="dark"] .chip {
    background-color: var(--dm-bg-elevated);
    color: var(--dm-text-primary);
}

/* Dark mode cards */
[data-theme="dark"] .card {
    box-shadow: 0 4px 12px var(--dm-shadow);
}

[data-theme="dark"] .card:hover {
    box-shadow: 0 8px 24px var(--dm-shadow);
}

[data-theme="dark"] .card-stat-value {
    color: var(--dm-text-primary);
}

[data-theme="dark"] .card-stat-label {
    color: var(--dm-text-secondary);
}

/* Dark mode progress bars */
[data-theme="dark"] .progress {
    background-color: var(--dm-bg-elevated);
}

/* Dark mode navigation */
[data-theme="dark"] .nav-tab {
    color: var(--dm-text-secondary);
}

[data-theme="dark"] .nav-tab:hover {
    color: var(--color-cyan-light);
}

[data-theme="dark"] .nav-tab.active {
    color: var(--color-cyan-light);
    border-bottom-color: var(--color-cyan-light);
}

/* Dark mode counter */
[data-theme="dark"] .counter {
    color: var(--dm-text-primary);
}

[data-theme="dark"] .counter-label {
    color: var(--dm-text-secondary);
}

/* Dark mode links - ensure visibility */
[data-theme="dark"] a {
    color: var(--color-cyan-light);
}

[data-theme="dark"] a:hover {
    color: var(--color-cyan);
}

/* Dark mode button links - preserve button text color */
[data-theme="dark"] .btn-primary,
[data-theme="dark"] a.btn-primary {
    color: #ffffff !important;
}

[data-theme="dark"] .btn-primary:hover {
    color: #ffffff !important;
}

/* Dark mode tables */
[data-theme="dark"] table {
    border-color: var(--dm-border);
}

[data-theme="dark"] th {
    background-color: var(--dm-bg-elevated);
    color: var(--dm-text-primary);
    border-color: var(--dm-border);
}

[data-theme="dark"] td {
    border-color: var(--dm-border);
    color: var(--dm-text-primary);
}

[data-theme="dark"] tr:hover {
    background-color: var(--dm-hover-bg);
}

/* Dark mode alerts/notifications */
[data-theme="dark"] .alert {
    background-color: var(--dm-bg-elevated);
    border-color: var(--dm-border);
    color: var(--dm-text-primary);
}

/* Dark mode modals */
[data-theme="dark"] .modal-backdrop {
    background-color: rgba(0, 0, 0, 0.8);
}

/* Dark mode tooltips */
[data-theme="dark"] .tooltip {
    background-color: var(--dm-bg-elevated);
    color: var(--dm-text-primary);
    border: 1px solid var(--dm-border);
}

/* Dark mode dropdowns */
[data-theme="dark"] .dropdown-menu {
    background-color: var(--dm-bg-card);
    border-color: var(--dm-border);
    box-shadow: 0 4px 12px var(--dm-shadow);
}

[data-theme="dark"] .dropdown-item {
    color: var(--dm-text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: var(--dm-hover-bg);
}

/* Dark mode text utilities */
[data-theme="dark"] .text-primary {
    color: var(--dm-text-primary) !important;
}

[data-theme="dark"] .text-secondary {
    color: var(--dm-text-secondary) !important;
}

/* Dark mode scrollbars */
[data-theme="dark"] ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--dm-bg-page);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--dm-border);
    border-radius: 4px;
}

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

/* ===== DARK MODE TOGGLE ===== */
.dark-mode-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 18px;
    color: var(--color-text-secondary);
}

.dark-mode-toggle:hover {
    background: var(--color-bg-secondary);
    transform: scale(1.05);
}

/* Light mode: show moon (to switch to dark) */
.dark-mode-toggle .icon-moon {
    display: inline;
}

.dark-mode-toggle .icon-sun {
    display: none;
}

/* Dark mode: show sun (to switch to light) */
[data-theme="dark"] .dark-mode-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .dark-mode-toggle .icon-sun {
    display: inline;
}

/* ===== GLOBAL RESETS ===== */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ===== BUTTONS ===== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    user-select: none;
}

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

/* Primary Button (Cyan) */
.btn-primary {
    background-color: var(--color-cyan);
    color: var(--color-text-white);
    box-shadow: var(--shadow-trim);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-cyan-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-primary:active:not(:disabled) {
    background-color: var(--color-cyan-dark);
    transform: translateY(0);
}

/* Secondary Button (Outlined) */
.btn-secondary {
    background-color: transparent;
    color: var(--color-cyan);
    border: 2px solid var(--color-cyan);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-cyan);
    color: var(--color-text-white);
    transform: translateY(-2px);
}

/* Destructive Button (Orange) */
.btn-destructive {
    background-color: var(--color-orange);
    color: var(--color-text-white);
}

.btn-destructive:hover:not(:disabled) {
    background-color: var(--color-orange-light);
    transform: translateY(-2px);
}

/* Dark Button (Trottles) */
.btn-dark {
    background-color: var(--color-trottles);
    color: var(--color-text-white);
}

.btn-dark:hover:not(:disabled) {
    background-color: #37474F;
    transform: translateY(-2px);
}

/* Button Sizes */
.btn-sm {
    padding: 8px 16px;
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

.btn-xl {
    padding: 20px 48px;
    font-size: var(--font-size-xl);
}

/* ===== INPUTS ===== */

.input {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--font-size-base);
    font-family: var(--font-primary);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    border: 2px solid var(--color-gray-medium);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.input:focus {
    outline: none;
    border-color: var(--color-cyan);
    box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.1);
}

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

.input:disabled {
    background-color: var(--color-gray-light);
    cursor: not-allowed;
}

/* Input with label */
.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

/* ===== CARDS ===== */

.card {
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-log);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

/* Card with cyan gradient background */
.card-cyan {
    background: linear-gradient(135deg, #00BCD4 0%, #0097A7 100%);
    color: var(--color-text-white);
}

/* Stat card (small) */
.card-stat {
    padding: var(--spacing-md);
    text-align: center;
    border-radius: var(--radius-md);
}

.card-stat-value {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-black);
    color: var(--color-text-primary);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.card-stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== CHIPS / TAGS ===== */

.chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 6px 12px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-pill);
    background-color: var(--color-gray-light);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
    white-space: nowrap;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chip-cyan {
    background-color: var(--color-cyan);
    color: var(--color-text-white);
}

.chip-orange {
    background-color: var(--color-orange);
    color: var(--color-text-white);
}

.chip-dark {
    background-color: var(--color-trottles);
    color: var(--color-text-white);
}

.chip-active,
.chip.active {
    background-color: var(--color-cyan-dark);
    color: var(--color-text-white) !important;
}

.chip-sm {
    padding: 4px 10px;
    font-size: var(--font-size-xs);
}

/* Chip as button */
button.chip {
    border: none;
    cursor: pointer;
}

button.chip:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

/* ===== TOGGLES / SWITCHES ===== */

.toggle {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-gray-medium);
    transition: var(--transition-base);
    border-radius: var(--radius-pill);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-base);
    border-radius: 50%;
}

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

.toggle input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

/* ===== NAVIGATION ===== */

.nav-tab {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-bottom: 3px solid transparent;
    transition: all var(--transition-base);
    cursor: pointer;
}

.nav-tab:hover {
    color: var(--color-cyan);
}

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

/* ===== ICONOGRAPHY ===== */

.icon {
    width: 24px;
    height: 24px;
    display: inline-block;
}

.icon-sm {
    width: 16px;
    height: 16px;
}

.icon-lg {
    width: 32px;
    height: 32px;
}

.icon-xl {
    width: 48px;
    height: 48px;
}

/* ===== MASCOT ===== */

.mascot {
    width: 120px;
    height: auto;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.mascot-sm {
    width: 60px;
}

.mascot-lg {
    width: 200px;
}

/* ===== PROGRESS BARS ===== */

.progress {
    width: 100%;
    height: 8px;
    background-color: var(--color-gray-light);
    border-radius: var(--radius-pill);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-cyan) 0%, var(--color-cyan-light) 100%);
    border-radius: var(--radius-pill);
    transition: width var(--transition-base);
}

.progress-bar-orange {
    background: linear-gradient(90deg, var(--color-orange) 0%, var(--color-orange-light) 100%);
}

/* ===== ACHIEVEMENT BADGES ===== */

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: var(--color-orange);
    color: var(--color-text-white);
    border-radius: var(--radius-circle);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
}

.badge-lg {
    width: 48px;
    height: 48px;
    font-size: var(--font-size-lg);
}

/* ===== COUNTER (Jump Counter) ===== */

.counter {
    font-size: var(--font-size-jumbo);
    font-weight: var(--font-weight-black);
    color: var(--color-text-primary);
    line-height: 1;
    text-align: center;
    font-family: var(--font-monospace);
    letter-spacing: -0.02em;
}

.counter-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: var(--spacing-xs);
}

/* ===== UTILITIES ===== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-cyan { color: var(--color-cyan); }
.text-orange { color: var(--color-orange); }
.text-white { color: var(--color-text-white); }

.bg-cyan { background-color: var(--color-cyan); }
.bg-cyan-light { background-color: var(--color-bg-cyan-light); }
.bg-white { background-color: var(--color-bg-primary); }
.bg-gray { background-color: var(--color-bg-secondary); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-pill { border-radius: var(--radius-pill); }
.rounded-circle { border-radius: var(--radius-circle); }

.shadow-trim { box-shadow: var(--shadow-trim); }
.shadow-log { box-shadow: var(--shadow-log); }
.shadow-hover { box-shadow: var(--shadow-hover); }

/* Spacing utilities */
.p-0 { padding: 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); }

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

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* ===== ICON SYSTEM ===== */

.icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
    flex-shrink: 0;
    fill: currentColor;
    stroke: currentColor;
}

.icon-xs { width: 12px; height: 12px; }
.icon-sm { width: 16px; height: 16px; }
.icon-md { width: 20px; height: 20px; }
.icon-lg { width: 24px; height: 24px; }
.icon-xl { width: 32px; height: 32px; }
.icon-2xl { width: 48px; height: 48px; }

/* Icon colors */
.icon-primary { color: var(--color-primary); }
.icon-secondary { color: var(--color-text-secondary); }
.icon-success { color: var(--color-success); }
.icon-warning { color: var(--color-warning); }
.icon-error { color: var(--color-error); }
.icon-muted { color: var(--color-text-tertiary); }

/* Icon with text spacing */
.icon + span, span + .icon,
.icon + .text, .text + .icon {
    margin-left: 0.35em;
}

/* Icon button wrapper */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.icon-btn:hover {
    background: var(--color-bg-tertiary, rgba(0,0,0,0.05));
}

/* Missing icon fallback */
.icon-missing {
    display: inline-block;
    width: 1em;
    height: 1em;
    background: var(--color-bg-tertiary, #f0f0f0);
    border-radius: 2px;
}