/* Ramin Tools - Main Stylesheet v5.7.2 */

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

:root {
    /* Modern Color Palette */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    --primary-300: #7dd3fc;
    --primary-400: #38bdf8;
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;
    --primary-800: #075985;
    --primary-900: #0c4a6e;

    /* Gradient Colors */
    --gradient-start: #667eea;
    --gradient-end: #764ba2;
    --gradient-accent: #f093fb;
    --gradient-secondary: #f5576c;

    /* Light Theme */
    --background: #ffffff;
    --background-secondary: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.2);
    --backdrop-blur: blur(12px);

    /* Sizing */
    --navbar-height: 72px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', sans-serif;
    --font-family-secondary: 'Poppins', sans-serif;
}

[data-theme='dark'] {
    --background: #0f172a;
    --background-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border: #334155;
    --border-light: #1e293b;
    --glass-bg: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(100, 116, 139, 0.2);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family-primary);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(118, 75, 162, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(240, 147, 251, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
    animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.navbar-brand .logo {
    font-family: var(--font-family-secondary);
    font-size: 1.75rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    transition: transform var(--transition-fast);
    display: inline-block;
}

.navbar-brand .logo:hover {
    transform: scale(1.05);
}

.logo-accent {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-center {
    flex: 1;
    max-width: 600px;
}

.search-wrapper {
    position: relative;
    width: 100%;
}

#search-bar {
    width: 100%;
    height: 44px;
    padding: 0 20px 0 48px;
    border: 2px solid var(--border);
    border-radius: var(--border-radius-xl);
    background: var(--background);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all var(--transition-fast);
    outline: none;
}

#search-bar:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
}

.search-suggestions {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-xl);
    max-height: 320px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.search-suggestions.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.nav-buttons {
    display: flex;
    gap: 0.5rem;
}

.nav-button {
    padding: 8px 18px;
    border-radius: var(--border-radius-md);
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

.nav-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Theme Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--background);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    border-color: var(--primary-500);
    transform: rotate(180deg);
}

.sun-icon, .moon-icon {
    position: absolute;
    font-size: 1.1rem;
    transition: all var(--transition-normal);
}

.sun-icon {
    color: #f59e0b;
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.moon-icon {
    color: #6366f1;
    opacity: 0;
    transform: rotate(180deg) scale(0.8);
}

[data-theme='dark'] .sun-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0.8);
}

[data-theme='dark'] .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Main Content */
.main-content {
    margin-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height));
}

/* Hero Section */
.hero-section {
    padding: 5rem 2rem 3rem;
    text-align: center;
    position: relative;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-family: var(--font-family-secondary);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.stat-number {
    font-family: var(--font-family-secondary);
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Tools Section */
.tools-section {
    padding: 2rem 2rem 5rem;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-family: var(--font-family-secondary);
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2rem;
    letter-spacing: -0.01em;
}

/* Filter Tabs */
.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.625rem 1.25rem;
    border: 2px solid var(--border);
    border-radius: var(--border-radius-xl);
    background: var(--background);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
}

.filter-tab:hover {
    border-color: var(--primary-500);
    color: var(--primary-500);
    transform: translateY(-2px);
}

.filter-tab.active {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-md);
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
    animation: fadeInUp 0.6s ease-out;
}

/* Tool Card */
.tool-card {
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: 1.75rem;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 200px;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.tool-card:hover::before {
    left: 100%;
}

.tool-card:hover {
    border-color: var(--primary-500);
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.tool-card.featured {
    border-color: var(--gradient-start);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.03), rgba(118, 75, 162, 0.03));
}

.tool-card.admin-only {
    border-color: var(--gradient-secondary);
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.03), rgba(240, 147, 251, 0.03));
}

.tool-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

/* Tool Icons */
.tool-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-normal);
}

.tool-icon.admin { background: linear-gradient(135deg, #f5576c, #f093fb); color: white; }
.tool-icon.health { background: linear-gradient(135deg, #ff6b6b, #feca57); color: white; }
.tool-icon.timer { background: linear-gradient(135deg, #667eea, #764ba2); color: white; }
.tool-icon.mobile { background: linear-gradient(135deg, #4ecdc4, #44a08d); color: white; }
.tool-icon.react { background: linear-gradient(135deg, #61dafb, #21759b); color: white; }
.tool-icon.weather { background: linear-gradient(135deg, #74b9ff, #0984e3); color: white; }
.tool-icon.test { background: linear-gradient(135deg, #a29bfe, #6c5ce7); color: white; }
.tool-icon.markdown { background: linear-gradient(135deg, #2d3436, #636e72); color: white; }
.tool-icon.report { background: linear-gradient(135deg, #00b894, #00cec9); color: white; }
.tool-icon.viewer { background: linear-gradient(135deg, #fdcb6e, #e17055); color: white; }

.tool-card:hover .tool-icon {
    transform: scale(1.1) rotate(5deg);
}

/* Tool Badges */
.tool-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-xl);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tool-badge.new {
    background: linear-gradient(135deg, #00b894, #00cec9);
    color: white;
    animation: pulse 2s infinite;
}

.tool-badge.updated {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.tool-badge.beta {
    background: linear-gradient(135deg, #a29bfe, #6c5ce7);
    color: white;
}

.tool-badge:not(.new):not(.updated):not(.beta) {
    background: linear-gradient(135deg, #f5576c, #f093fb);
    color: white;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.05); }
}

.tool-content {
    flex: 1;
}

.tool-content h4 {
    font-family: var(--font-family-secondary);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.tool-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.tool-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
}

.tool-tag {
    padding: 0.375rem 0.875rem;
    background: var(--background-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-xl);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
}

.tool-arrow {
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.tool-card:hover .tool-arrow {
    color: var(--primary-500);
    transform: translateX(4px);
}

.tool-card.hidden {
    display: none;
}

/* Favorite Button */
.favorite-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--background);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

.favorite-btn:hover {
    border-color: #fbbf24;
    color: #fbbf24;
    transform: scale(1.1);
}

.favorite-btn.active {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    border-color: transparent;
    color: white;
}

.favorite-btn.active:hover {
    transform: scale(1.15) rotate(15deg);
}

.favorite-btn i {
    font-size: 0.9rem;
    transition: transform var(--transition-fast);
}

.favorite-btn.active i {
    animation: starPop 0.3s ease-out;
}

@keyframes starPop {
    0% { transform: scale(0.8); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* Footer */
.footer {
    background: var(--background-secondary);
    border-top: 1px solid var(--border);
    padding: 2.5rem 2rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-left, .footer-center, .footer-right {
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.footer-version, .footer-copyright, .footer-creator {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0.25rem 0;
}

.footer-version {
    font-weight: 600;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.footer-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-500);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */

/* Tablet & Below */
@media (max-width: 1024px) {
    .navbar-container {
        padding: 0 1.5rem;
    }

    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 1.25rem;
    }
}

/* Mobile Large */
@media (max-width: 768px) {
    :root {
        --navbar-height: 120px;
    }

    .navbar-container {
        padding: 0 1rem;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .navbar-brand {
        flex: 1;
    }

    .navbar-brand .logo {
        font-size: 1.5rem;
    }

    .navbar-center {
        order: 3;
        flex-basis: 100%;
        margin-top: 0;
    }

    #search-bar {
        height: 40px;
        font-size: 0.875rem;
    }

    .hero-section {
        padding: 3rem 1.5rem 2rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .filter-tabs {
        gap: 0.5rem;
    }

    .filter-tab {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .tool-card {
        min-height: 180px;
        padding: 1.5rem;
    }

    .tool-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }

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

/* Mobile Small */
@media (max-width: 480px) {
    .hero-section {
        padding: 2rem 1rem 1.5rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-stats {
        gap: 1rem;
        flex-direction: column;
    }

    .stat-item {
        width: 100%;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .filter-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
    }

    .filter-tab {
        flex-shrink: 0;
    }

    .tool-content h4 {
        font-size: 1.125rem;
    }

    .tool-content p {
        font-size: 0.85rem;
    }
}

/* Landscape Mobile */
@media (max-height: 600px) and (orientation: landscape) {
    :root {
        --navbar-height: 80px;
    }

    .hero-section {
        padding: 2rem 1.5rem 1rem;
    }

    .hero-stats {
        flex-direction: row;
        gap: 2rem;
    }
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--background-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 5px;
}

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

/* Skip to Content Link */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    padding: 0.75rem 1.5rem;
    background: var(--primary-600);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: top var(--transition-fast);
}

.skip-to-content:focus {
    top: 1rem;
}

/* Filter Count Badge */
.filter-count {
    display: inline-block;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    margin-left: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 20px;
    text-align: center;
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-fast);
}

.filter-tab .filter-count:not(:empty) {
    opacity: 1;
    transform: scale(1);
}

.filter-tab.active .filter-count {
    background: rgba(255, 255, 255, 0.3);
}

/* Enhanced Card Animations */
@keyframes cardSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.tool-card {
    animation: cardSlideIn 0.5s ease-out backwards;
}

/* Stagger animation for cards */
.tool-card:nth-child(1) { animation-delay: 0.05s; }
.tool-card:nth-child(2) { animation-delay: 0.1s; }
.tool-card:nth-child(3) { animation-delay: 0.15s; }
.tool-card:nth-child(4) { animation-delay: 0.2s; }
.tool-card:nth-child(5) { animation-delay: 0.25s; }
.tool-card:nth-child(6) { animation-delay: 0.3s; }
.tool-card:nth-child(7) { animation-delay: 0.35s; }
.tool-card:nth-child(8) { animation-delay: 0.4s; }
.tool-card:nth-child(9) { animation-delay: 0.45s; }
.tool-card:nth-child(10) { animation-delay: 0.5s; }

/* Loading Skeleton */
.tool-card.loading {
    background: linear-gradient(
        90deg,
        var(--background) 0%,
        var(--background-secondary) 50%,
        var(--background) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

/* Focus Visible Styles */
.tool-card:focus-visible,
.filter-tab:focus-visible,
.nav-button:focus-visible,
.theme-toggle:focus-visible,
#search-bar:focus-visible {
    outline: 3px solid var(--primary-500);
    outline-offset: 2px;
}

/* Smooth Theme Transition */
body,
.navbar,
.tool-card,
.filter-tab,
.footer {
    transition:
        background-color var(--transition-normal),
        color var(--transition-normal),
        border-color var(--transition-normal);
}

[data-theme='dark'] body::before {
    opacity: 0.5;
}

/* Enhanced Dark Mode Gradients */
[data-theme='dark'] .gradient-text,
[data-theme='dark'] .logo-accent,
[data-theme='dark'] .stat-number {
    background: linear-gradient(135deg, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}