/* tools/parts/tools-common.css */
/* ============================================================
   DAs Gaming - Tool Common Styles
   Card-Based Modern UI / Dark Sci-Fi / Glassmorphism
   ============================================================ */

/* ================================================
   1. CSS Variables - Dark Mode (Default)
   ================================================ */
:root {
    /* Base Colors */
    --color-bg: #0a0a0f;
    --color-text: #f0f0f5;
    --color-text-muted: #888899;

    /* Accent Colors */
    --color-accent-primary: #ff5500;
    --color-accent-primary-rgb: 255, 85, 0;
    --color-accent-secondary: #00bcd4;
    --color-accent-secondary-rgb: 0, 188, 212;
    --color-accent-tertiary: #1a237e;
    --color-accent-tertiary-rgb: 26, 35, 126;

    /* Base RGB for RGBA usage */
    --color-black-rgb: 0, 0, 0;
    --color-white-rgb: 255, 255, 255;

    /* Status Colors */
    --color-success: #22c55e;
    --color-success-rgb: 34, 197, 94;
    --color-error: #ef4444;
    --color-error-rgb: 239, 68, 68;
    --color-warning: #f59e0b;
    --color-warning-rgb: 245, 158, 11;
    --color-info: #3b82f6;
    --color-info-rgb: 59, 130, 246;

    /* Card/Surface */
    --card-bg: rgba(20, 20, 30, 0.85);
    --card-border: rgba(255, 255, 255, 0.1);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

    /* Input/Form */
    --input-bg: rgba(0, 0, 0, 0.4);
    --input-border: rgba(255, 255, 255, 0.15);
    --input-focus-border: var(--color-accent-primary);
    --input-focus-shadow: 0 0 0 3px rgba(255, 85, 0, 0.2);

    /* Common Colors */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-text-dark: #1e293b;
    --color-text-light: #f0f0f5;

    /* Social Media Brand Colors */
    --color-twitter: #1DA1F2;
    --color-facebook: #1877F2;
    --color-line: #06c755;

    /* Preview Card Colors (light bg for previews) */
    --preview-bg: #ffffff;
    --preview-border: #cfd9de;
    --preview-placeholder: #e1e8ed;
    --preview-text: #0f1419;
    --preview-text-muted: #536471;

    /* Markdown Preview Colors */
    --md-bg: #0d1117;
    --md-text: #c9d1d9;
    --md-border: #21262d;
    --md-link: #58a6ff;
    --md-code-bg: #161b22;
    --md-blockquote: #8b949e;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

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

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: 'Roboto', 'Noto Sans JP', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    min-height: 100vh;
    padding: var(--spacing-lg);
}

/* Iframe mode */
body.in-iframe {
    padding: var(--spacing-md);
}

/* Dark theme iframe gets transparent background */
body.in-iframe:not(.theme-light) {
    background: transparent !important;
}

/* Light theme iframe gets white background to cover dark modal overlay */
body.in-iframe.theme-light {
    background: var(--color-white) !important;
}

/* ================================================
   2.5 Background Effect (Grid Pattern)
   ================================================ */
.bg-effect {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    background-image:
        linear-gradient(rgba(var(--color-accent-secondary-rgb), 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(var(--color-accent-secondary-rgb), 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(circle at center, var(--color-black) 40%, transparent 90%);
    pointer-events: none;
}

/* Light Mode: reduce grid visibility */
body.theme-light .bg-effect {
    opacity: 0.3;
}

/* ================================================
   3. Typography
   ================================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-text);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1.1rem;
}

p {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

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

/* ================================================
   4. Header & Breadcrumb
   ================================================ */
.tool-header {
    background: linear-gradient(180deg, rgba(10, 10, 15, 0.95) 0%, transparent 100%);
    border-bottom: 1px solid var(--card-border);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: calc(var(--spacing-lg) * -1) calc(var(--spacing-lg) * -1) var(--spacing-lg) calc(var(--spacing-lg) * -1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.brand-link {
    text-decoration: none;
}

.brand-text {
    font-family: 'Teko', sans-serif;
    font-size: 1.8rem;
    font-weight: 300;
    letter-spacing: 0.3em;
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
    background-image: linear-gradient(90deg, var(--color-accent-primary), #ff7700, var(--color-accent-primary));
    filter: drop-shadow(0 0 8px rgba(255, 85, 0, 0.5));
    transition: all var(--transition-normal);
}

.brand-link:hover .brand-text {
    filter: drop-shadow(0 0 15px rgba(255, 85, 0, 0.8));
    letter-spacing: 0.35em;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--color-text-muted);
}

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

.breadcrumb .separator {
    color: var(--card-border);
}

.breadcrumb .current {
    color: var(--color-text);
    font-weight: 500;
}

/* ================================================
   5. Card System
   ================================================ */
.card,
.cyber-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin-bottom: var(--spacing-lg);
}

.card-header {
    border-bottom: 1px solid var(--card-border);
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.card-header h3 {
    margin-bottom: 0;
    color: var(--color-accent-primary);
}

.card-body {
    /* No specific styles - inherits card padding */
    display: block;
}

.card-footer {
    border-top: 1px solid var(--card-border);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* Card with accent border */
.card-accent {
    border-left: 3px solid var(--color-accent-primary);
}

/* Card hover effect */
.card-interactive {
    cursor: pointer;
    transition: all var(--transition-normal);
}

.card-interactive:hover {
    border-color: var(--color-accent-primary);
    box-shadow: var(--card-shadow), 0 0 20px rgba(255, 85, 0, 0.1);
    transform: translateY(-2px);
}

/* ================================================
   6. Layout Containers
   ================================================ */
.tool-container {
    max-width: 800px;
    margin: 0 auto;
}

.tool-container-wide {
    max-width: 1200px;
    margin: 0 auto;
}

.container-col {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.container-row {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.container-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

@media (max-width: 768px) {
    .container-split {
        grid-template-columns: 1fr;
    }
}

/* ================================================
   7. Form Elements
   ================================================ */
input[type="text"],
input[type="number"],
input[type="url"],
input[type="email"],
input[type="password"],
textarea,
select {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: 'Consolas', 'Monaco', 'Roboto Mono', monospace;
    transition: all var(--transition-fast);
    min-height: 44px;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: var(--input-focus-shadow);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-muted);
    opacity: 0.7;
}

textarea {
    resize: vertical;
    min-height: 120px;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23888' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat !important;
    background-position: calc(100% - 1rem) center !important;
    background-size: 12px 12px;
    padding-right: 2.5rem;
}

select option {
    background: var(--color-bg);
    color: var(--color-text);
}

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

.form-row {
    display: flex;
    gap: var(--spacing-md);
}

.form-row>* {
    flex: 1;
}

/* Checkbox & Radio */
input[type="checkbox"],
input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-accent-primary);
    cursor: pointer;
}

.checkbox-label,
.radio-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    text-transform: none;
    font-size: 0.95rem;
    color: var(--color-text);
}

/* Range slider */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--input-border);
    border-radius: var(--radius-full);
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-accent-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--color-accent-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* ================================================
   8. Button System
   ================================================ */
button,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    min-height: 44px;
    white-space: nowrap;
}

button:hover,
.btn:hover {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    color: #000;
    box-shadow: 0 0 20px rgba(255, 85, 0, 0.4);
}

button:active,
.btn:active {
    transform: scale(0.98);
}

button:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* Primary Action Button */
.btn-action {
    background: linear-gradient(135deg, var(--color-accent-primary), #ff7700);
    border: none;
    color: #000;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(255, 85, 0, 0.3);
}

.btn-action:hover {
    background: linear-gradient(135deg, #ff7700, #ff9500);
    box-shadow: 0 6px 25px rgba(255, 85, 0, 0.5);
    transform: translateY(-2px);
    color: #000;
}

/* Copy Button */
.btn-copy {
    background: rgba(0, 188, 212, 0.15);
    border: 1px solid var(--color-accent-secondary);
    color: var(--color-accent-secondary);
}

.btn-copy:hover {
    background: var(--color-accent-secondary);
    color: #000;
    box-shadow: 0 0 15px rgba(0, 188, 212, 0.4);
}

/* Reset/Clear Button */
.btn-reset {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

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

/* Secondary Button */
.btn-secondary {
    background: var(--color-accent-tertiary);
    border-color: var(--color-accent-tertiary);
    color: #fff;
}

.btn-secondary:hover {
    background: #303f9f;
    color: #fff;
}

/* Decode Button (differentiated from Encode) */
.btn-decode {
    background: rgba(26, 35, 126, 0.15);
    border: 1px solid var(--color-accent-tertiary);
    color: var(--color-accent-tertiary);
}

.btn-decode:hover {
    background: var(--color-accent-tertiary);
    color: #fff;
    box-shadow: 0 0 15px rgba(26, 35, 126, 0.4);
}

/* Button Sizes */
.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    min-height: 36px;
}

.btn-block {
    width: 100%;
}

/* Button Group */
.btn-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ================================================
   9. Control Panel
   ================================================ */
.controls {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.control-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.control-group label {
    margin-bottom: 0;
}

/* ================================================
   10. Result Display
   ================================================ */
.result-box {
    background: var(--card-bg);
    border: 2px solid var(--color-accent-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: 0 0 30px rgba(255, 85, 0, 0.1) inset;
}

.result-value {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 1.5rem;
    color: var(--color-accent-primary);
    word-break: break-all;
    text-shadow: 0 0 15px rgba(255, 85, 0, 0.3);
}

.result-value.large {
    font-size: 3rem;
    font-weight: bold;
}

/* ================================================
   11. Display Box (Input + Button)
   ================================================ */
.display-box {
    display: flex;
    gap: var(--spacing-sm);
    align-items: stretch;
}

.display-box input {
    flex: 1;
}

.input-with-btn {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.input-with-btn input {
    flex: 1;
}

/* ================================================
   12. Options Grid
   ================================================ */
.options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.options-grid label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.95rem;
    color: var(--color-text);
    text-transform: none;
    cursor: pointer;
    margin-bottom: 0;
}

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

/* ================================================
   13. Table Styles
   ================================================ */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-md);
}

th,
td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}

th {
    color: var(--color-accent-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

td {
    color: var(--color-text);
}

tr:hover td {
    background: rgba(255, 255, 255, 0.03);
}

/* ================================================
   14. Code Output
   ================================================ */
pre,
code {
    font-family: 'Consolas', 'Monaco', 'Roboto Mono', monospace;
    font-size: 0.9rem;
}

.code-output {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-x: auto;
    position: relative;
}

.code-output pre {
    margin: 0;
    color: var(--color-text);
    white-space: pre-wrap;
    word-break: break-all;
}

.code-output .btn-copy {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
}

/* ================================================
   15. Status & Badges
   ================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-success {
    background: rgba(34, 197, 94, 0.2);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.badge-error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

.badge-info {
    background: rgba(59, 130, 246, 0.2);
    color: var(--color-info);
    border: 1px solid var(--color-info);
}

/* ================================================
   16. Loading & Spinner
   ================================================ */
.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--card-border);
    border-top-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
}

/* ================================================
   17. Toast Notifications
   ================================================ */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
    animation: toastSlideIn 0.3s ease forwards;
    pointer-events: auto;
}

.toast-success {
    border-color: var(--color-success);
    color: var(--color-success);
}

.toast-error {
    border-color: var(--color-error);
    color: var(--color-error);
}

.toast-info {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

.toast.hide {
    animation: toastSlideOut 0.3s ease forwards;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastSlideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }

    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ================================================
   18. Footer
   ================================================ */
.tool-footer {
    border-top: 1px solid var(--card-border);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    text-align: center;
    background: linear-gradient(0deg, rgba(10, 10, 15, 0.9) 0%, transparent 100%);
}

.footer-links {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.footer-links a {
    color: var(--color-text-muted);
}

.footer-links a:hover {
    color: var(--color-accent-primary);
}

.footer-links .separator {
    margin: 0 var(--spacing-sm);
    color: var(--card-border);
}

body.in-iframe .tool-footer {
    display: none;
}

/* ================================================
   19. Animations
   ================================================ */
.fade-in {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.flash {
    animation: flashAnim 0.5s ease;
}

@keyframes flashAnim {
    0% {
        color: #fff;
        text-shadow: 0 0 20px #fff;
    }

    100% {
        color: var(--color-accent-primary);
        text-shadow: 0 0 10px rgba(255, 85, 0, 0.3);
    }
}

/* ================================================
   20. Utility Classes
   ================================================ */
.hidden {
    display: none !important;
}

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

.text-muted {
    color: var(--color-text-muted);
}

.text-accent {
    color: var(--color-accent-primary);
}

.text-success {
    color: var(--color-success);
}

.text-error {
    color: var(--color-error);
}

.hint-text {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    text-align: center;
    margin-top: var(--spacing-sm);
}

.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mt-4 {
    margin-top: var(--spacing-xl);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

.mb-4 {
    margin-bottom: var(--spacing-xl);
}

/* ================================================
   21. Responsive
   ================================================ */
@media (max-width: 600px) {
    body {
        padding: var(--spacing-md);
    }

    .tool-header {
        padding: var(--spacing-sm) var(--spacing-md);
        margin: calc(var(--spacing-md) * -1) calc(var(--spacing-md) * -1) var(--spacing-md) calc(var(--spacing-md) * -1);
    }

    .header-container {
        flex-direction: column;
        align-items: flex-start;
    }

    .brand-text {
        font-size: 1.4rem;
    }

    .card {
        padding: var(--spacing-md);
    }

    .form-row {
        flex-direction: column;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn-group button {
        width: 100%;
    }

    .result-value.large {
        font-size: 2rem;
    }
}

/* ================================================
   17. Spinner / Loading
   ================================================ */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--card-border);
    border-top-color: var(--color-accent-secondary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

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

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--color-black-rgb), 0.5);
    z-index: 100;
    border-radius: inherit;
}

body.theme-light .loading-overlay {
    background: rgba(var(--color-white-rgb), 0.7);
}

/* ================================================
   18. Icon Utility
   ================================================ */
.icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25em;
    height: 1.25em;
    vertical-align: -0.125em;
}

button .icon,
.btn .icon {
    margin-right: var(--spacing-xs);
}

/* SVG Icons inherit color */
.icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    fill: none;
}

/* ================================================
   Accessibility Utilities
   ================================================ */

/* Screen Reader Only - visually hidden but accessible to screen readers and search engines */
.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;
}