:root {
    /* Color tokens */
    --color-primary: #0969da;
    --color-primary-hover: #0550ae;
    --color-primary-light: #ddf4ff;
    --color-text: #1f2328;
    --color-text-secondary: #656d76;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-success: #1a7f37;
    --color-warning: #bf8700;
    --color-error: #cf222e;
    
    /* Background tokens */
    --bg-page: linear-gradient(135deg, #e8f0fe 0%, #dce6f5 30%, #c8d8ed 60%, #d4e0ef 100%);
    --bg-card: rgba(255, 255, 255, 0.75);
    --bg-card-hover: rgba(255, 255, 255, 0.88);
    --bg-input: rgba(255, 255, 255, 0.85);
    --bg-header: rgba(255, 255, 255, 0.95);
    
    /* Shadow tokens */
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-dropdown: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Size tokens */
    --size-container: 1400px;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 80px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Consolas, monospace;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 20px;
    --font-size-2xl: 28px;
    --font-size-3xl: 36px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    
    /* Layout */
    --header-height: 60px;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: var(--font-size-base); -webkit-font-smoothing: antialiased; }

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--bg-page);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-header);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
}

.header-content {
    max-width: var(--size-container);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex: 1;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 700;
    font-size: var(--font-size-lg);
    white-space: nowrap;
}

.header-logo img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
}

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

.header-nav a {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.header-nav a:hover,
.header-nav a.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
    font-weight: 600;
}

/* Nav toggle (hamburger) */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-text);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    line-height: 1;
    margin-left: auto;
    z-index: 120;
}

.nav-toggle:hover {
    background: var(--color-primary-light);
}

/* Nav close button (inside overlay) */
.nav-close {
    display: none;
}

/* Nav overlay backdrop */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.3);
    z-index: 110;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.nav-overlay.show {
    opacity: 1;
}

.header-nav a:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

/* Container */
.container {
    max-width: var(--size-container);
    width: 100%;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-xl);
    flex: 1;
}

/* Tool Dashboard Grid */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-md);
}

/* Tool Card */
.tool-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-xs);
}

.tool-card:hover {
    background: var(--bg-card-hover);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-3px);
    border-color: var(--color-primary-light);
}

.tool-card-title {
    font-weight: 600;
    font-size: var(--font-size-base);
    color: var(--color-text);
    flex: 1;
    min-width: 0;
}

.tool-card-desc {
    width: 100%;
}

.tool-card-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.tool-card-category {
    display: inline-block;
    font-size: 11px;
    font-weight: 500;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 2px 8px;
    border-radius: 10px;
    align-self: flex-start;
    margin-top: var(--space-xs);
}

/* Partner section */
.partner-section {
    margin-top: var(--space-2xl);
}

.partner-header {
    margin-bottom: var(--space-md);
}

.partner-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.partner-header p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    max-width: 680px;
}

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

.partner-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    color: var(--color-text);
    text-decoration: none;
    background: var(--bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all var(--transition-base);
}

.partner-card:hover {
    color: var(--color-text);
    text-decoration: none;
    background: var(--bg-card-hover);
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-3px);
}

.partner-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.partner-logo img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    display: block;
}

.partner-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--color-primary);
    background: var(--color-primary-light);
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.partner-body {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.partner-name {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}

.partner-desc,
.partner-domain {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.45;
}

.partner-domain {
    color: var(--color-primary);
    margin-top: var(--space-xs);
}

/* Page Header */
.page-header {
    text-align: center;
    padding: var(--space-xl) 0 var(--space-lg);
}

.page-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, var(--color-text), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Tool Page Layout */
.tool-page {
    max-width: 800px;
    margin: 0 auto;
}

.tool-header {
    margin-bottom: var(--space-xl);
}

.tool-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.tool-header p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

/* Tool Panel */
.tool-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    margin-bottom: var(--space-md);
}

.tool-panel-title {
    font-weight: 600;
    font-size: var(--font-size-base);
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-weight: 500;
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-xs);
    color: var(--color-text-secondary);
}

textarea, input[type="text"], input[type="number"], input[type="password"], select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    outline: none;
}

textarea:focus, input[type="text"]:focus, input[type="number"]:focus, select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.15);
}

textarea {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

textarea.code-area {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    min-height: 200px;
    tab-size: 2;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 8px 18px;
    font-size: var(--font-size-base);
    font-weight: 500;
    font-family: var(--font-family);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

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

.btn-secondary {
    background: rgba(255,255,255,0.8);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: #fff;
    border-color: rgba(0,0,0,0.15);
}

.btn-success {
    background: var(--color-success);
    color: #fff;
    border-color: var(--color-success);
}

.btn-sm {
    padding: 4px 12px;
    font-size: var(--font-size-sm);
}

.btn-group {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin: var(--space-md) 0;
}

/* Output Area */
.output-area {
    background: rgba(0,0,0,0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    word-break: break-all;
    min-height: 40px;
    position: relative;
}

.output-area .copy-btn {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    padding: 2px 8px;
    font-size: 11px;
    background: rgba(255,255,255,0.9);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.output-area:hover .copy-btn {
    opacity: 1;
}

/* Options row */
.options-row {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: var(--space-md);
}

.options-row .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 120px;
}

.checkbox-group {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 400;
    font-size: var(--font-size-sm);
    cursor: pointer;
}

/* Stats row */
.stats-row {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
    padding: var(--space-md);
    background: rgba(0,0,0,0.02);
    border-radius: var(--radius-sm);
    margin-top: var(--space-md);
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Split layout */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.lang-menu {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-dropdown);
    padding: var(--space-sm);
    display: none;
    z-index: 200;
    max-height: 400px;
}

.lang-menu::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -6px;
    border: 6px solid transparent;
    border-top-color: #fff;
}

.lang-menu::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -7px;
    border: 7px solid transparent;
    border-top-color: var(--color-border);
}

.lang-menu.show {
    display: block;
}

.lang-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
    min-width: 300px;
}

.lang-grid a {
    display: block;
    padding: 8px 12px;
    color: var(--color-text);
    text-decoration: none;
    font-size: 13px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}

.lang-grid a:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    text-decoration: none;
}

.lang-grid a.active {
    color: var(--color-primary);
    font-weight: 600;
    background: var(--color-primary-light);
}

@media (max-width: 1200px) {
    .tool-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .partner-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .split-layout {
        grid-template-columns: 1fr;
    }
    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .partner-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .page-header h1 {
        font-size: var(--font-size-2xl);
    }
    body {
        overflow-x: hidden;
    }
    html {
        overflow-x: hidden;
    }
    .header-content {
        padding: 0 var(--space-md);
    }
    .container {
        padding: var(--space-lg) var(--space-md);
    }
    /* Mobile lang menu: 3 columns */
    .lang-grid {
        grid-template-columns: repeat(3, 1fr);
        min-width: 0;
    }
    .lang-menu {
        max-height: 340px;
        position: fixed;
        left: 16px;
        right: 16px;
        top: auto;
        bottom: auto;
        transform: none;
        width: auto;
    }
    .lang-menu::after,
    .lang-menu::before {
        display: none;
    }
    /* Mobile nav: full-screen overlay from right (index page only) */
    .nav-toggle {
        display: block;
    }
    #mainNav {
        position: fixed;
        top: 0;
        right: -200px;
        width: 175px;
        height: 100vh;
        min-height: 100vh;
        background: var(--bg-header);
        backdrop-filter: blur(20px) saturate(180%);
        -webkit-backdrop-filter: blur(20px) saturate(180%);
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-2xl) var(--space-md) var(--space-md);
        gap: var(--space-xs);
        z-index: 130;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right var(--transition-base);
        overflow-y: auto;
        visibility: hidden;
        pointer-events: none;
    }
    #mainNav.open {
        right: 0;
        visibility: visible;
        pointer-events: auto;
    }
    /* Tool pages: simple back-link nav stays visible at right */
    .header-nav:not(#mainNav) {
        margin-left: auto;
    }
    .nav-links {
        display: flex;
        flex-direction: column;
        gap: var(--space-xs);
        padding-top: var(--space-md);
    }
    .nav-links a {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-base);
        border-radius: var(--radius-sm);
        white-space: normal;
    }
    .nav-close {
        display: block;
        position: absolute;
        top: var(--space-md);
        right: var(--space-md);
        background: none;
        border: none;
        font-size: 20px;
        cursor: pointer;
        color: var(--color-text-secondary);
        padding: 4px 8px;
        border-radius: var(--radius-sm);
    }
    .nav-close:hover {
        background: var(--color-primary-light);
        color: var(--color-primary);
    }
    .nav-overlay {
        display: block;
        pointer-events: none;
    }
    .nav-overlay.show {
        pointer-events: auto;
    }
    body.nav-open {
        overflow: hidden;
        position: relative;
    }
    html.nav-open {
        overflow: hidden;
    }
}

@media (max-width: 480px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }
    .partner-grid {
        grid-template-columns: 1fr;
    }
}

/* Tabs */
.tab-bar {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-md);
}

.tab-btn {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.tab-btn:hover {
    color: var(--color-text);
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Back link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-md);
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--color-primary);
}

/* Range slider */
input[type="range"] {
    width: 100%;
    accent-color: var(--color-primary);
}

.range-value {
    font-weight: 600;
    color: var(--color-primary);
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
    background: var(--bg-header);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    cursor: pointer;
}

.footer-links a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
    margin-top: var(--space-sm);
}

.footer-bottom a {
    color: var(--color-primary);
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* Language selector */
.lang-wrap {
    text-align: center;
    position: relative;
    display: inline-block;
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* KBD keyboard shortcut styling */
kbd {
    display: inline-block;
    padding: 2px 6px;
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--color-text);
    background: rgba(0,0,0,0.06);
    border: 1px solid var(--color-border);
    border-radius: 3px;
    line-height: 1.4;
    vertical-align: baseline;
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-text);
    color: #fff;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    z-index: 1000;
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
}

/* ===== Content Page Styles (About, Terms, Privacy) ===== */
.content-page {
    max-width: 780px;
    margin: 0 auto;
}

.content-page h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-top: var(--space-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.content-page h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.content-page p {
    margin-bottom: var(--space-md);
    line-height: 1.7;
    color: var(--color-text);
}

.content-page ul, .content-page ol {
    margin: var(--space-sm) 0 var(--space-md);
    padding-left: var(--space-xl);
}

.content-page li {
    margin-bottom: var(--space-xs);
    line-height: 1.6;
    color: var(--color-text);
}

.content-page strong {
    font-weight: 600;
}

.content-page a {
    color: var(--color-primary);
    text-decoration: none;
}

.content-page a:hover {
    text-decoration: underline;
}

/* Color swatch */
.color-swatch {
    display: inline-block;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--color-border);
    vertical-align: middle;
    cursor: pointer;
}

.color-preview {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-sm);
}

/* Tag / pill */
.tag {
    display: inline-block;
    padding: 2px 10px;
    font-size: 11px;
    font-weight: 500;
    border-radius: 10px;
    background: var(--color-primary-light);
    color: var(--color-primary);
}

/* Alert */
.alert {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-md);
}

.alert-error {
    background: #ffebe9;
    color: var(--color-error);
    border: 1px solid rgba(207,34,46,0.2);
}

.alert-success {
    background: #dafbe1;
    color: var(--color-success);
    border: 1px solid rgba(26,127,55,0.2);
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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