/* ============================================
   Text Utility Tools – Daily Use Toolkit
   Premium Style Sheet by 100X Solutions
   ============================================ */

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

:root {
    /* Colors - Premium Dark SaaS Theme */
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --bg-card: #1E293B;
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --accent-primary: #22D3EE;
    --accent-secondary: #38BDF8;
    --accent-gradient: linear-gradient(135deg, #22D3EE 0%, #38BDF8 100%);
    --accent-hover: #67E8F9;
    --success: #22C55E;
    --success-hover: #16A34A;
    --error: #EF4444;
    --warning: #F59E0B;
    --border-color: #334155;
    --border-hover: #475569;
    --border-light: rgba(148, 163, 184, 0.1);
    
    /* Shadows - Premium */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(34, 211, 238, 0.3);
    --shadow-glow-sm: 0 0 15px rgba(34, 211, 238, 0.2);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-card-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-xs: 12px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;
    --font-size-4xl: 56px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions - Smooth */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-toast: 400;
    --z-loader: 500;
}

/* Base Styles */
html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
    color: var(--text-secondary);
}

/* Links */
a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ============================================
   Header
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(15, 23, 42, 0.98);
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.logo:hover {
    color: var(--text-primary);
    transform: scale(1.02);
}

.logo-icon {
    font-size: 28px;
    filter: drop-shadow(0 0 10px rgba(34, 211, 238, 0.5));
    animation: iconPulse 3s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.nav {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
    background: rgba(34, 211, 238, 0.1);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 60%;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md);
    z-index: var(--z-dropdown);
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
}

.mobile-nav.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.mobile-nav-links .nav-link {
    padding: var(--spacing-md);
    font-size: var(--font-size-lg);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    text-align: center;
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.1) 0%, transparent 50%);
    animation: heroGlow 15s linear infinite;
    pointer-events: none;
}

@keyframes heroGlow {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hero h1 {
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #22D3EE 0%, #38BDF8 50%, #67E8F9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    letter-spacing: -1px;
    animation: titleGradient 8s ease infinite;
    background-size: 200% 200%;
    position: relative;
    z-index: 1;
}

@keyframes titleGradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    animation-delay: 0.2s;
}

.hero-note {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    animation-delay: 0.4s;
}

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

/* Floating badges animation */
.hero-note span {
    animation: float 3s ease-in-out infinite;
}

.hero-note span:nth-child(2) { animation-delay: 0.5s; }
.hero-note span:nth-child(3) { animation-delay: 1s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* ============================================
   Tool Tabs
   ============================================ */
.tool-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.tool-tab {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.tool-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.1), transparent);
    transition: left var(--transition-slow);
}

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

.tool-tab:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-sm);
}

.tool-tab.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: var(--bg-primary);
    font-weight: 600;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    animation: activeTabPulse 2s ease-in-out infinite;
}

@keyframes activeTabPulse {
    0%, 100% { box-shadow: 0 0 20px rgba(34, 211, 238, 0.3); }
    50% { box-shadow: 0 0 30px rgba(34, 211, 238, 0.5); }
}

/* ============================================
   Tools Container
   ============================================ */
.tools-container {
    position: relative;
}

.tool-panel {
    display: none;
    animation: fadeInScale 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tool-panel.active {
    display: block;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.tool-header {
    margin-bottom: var(--spacing-lg);
}

.tool-header h2 {
    margin-bottom: var(--spacing-xs);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tool-description {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* ============================================
   Tool Actions
   ============================================ */
.tool-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.action-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    border-color: var(--accent-primary);
    background: rgba(34, 211, 238, 0.1);
    color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.action-btn.primary {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

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

.action-btn.success {
    background: var(--success);
    border-color: var(--success);
    color: var(--bg-primary);
}

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

.custom-input {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    outline: none;
    transition: all var(--transition-fast);
}

.custom-input:focus {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

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

/* ============================================
   IO Section
   ============================================ */
.io-section {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.io-box {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.io-box.full-width {
    width: 100%;
}

.io-box label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.io-box textarea,
.io-box input[type="text"] {
    width: 100%;
    min-height: 200px;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    resize: vertical;
    outline: none;
    transition: all var(--transition-fast);
}

.io-box textarea:focus,
.io-box input[type="text"]:focus {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.io-box textarea::placeholder {
    color: var(--text-muted);
}

.io-box textarea[readonly] {
    background: var(--bg-tertiary);
    cursor: text;
}

.io-arrows {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    font-size: 24px;
    color: var(--accent-primary);
    flex-shrink: 0;
}

/* JSON Status */
.json-status {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    display: none;
}

.json-status.valid {
    display: block;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.json-status.invalid {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

/* Counter Stats */
.counter-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.stat-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

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

/* Find & Replace Controls */
.find-replace-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.control-group {
    flex: 1;
    min-width: 200px;
}

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

.control-group input[type="text"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    outline: none;
    transition: all var(--transition-fast);
}

.control-group input[type="text"]:focus {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.control-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    width: 100%;
    padding-top: var(--spacing-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--accent-primary);
    width: 16px;
    height: 16px;
}

.match-info {
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    background: var(--bg-secondary);
}

/* ============================================
   Tool Footer
   ============================================ */
.tool-footer {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.copy-btn,
.clear-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.copy-btn {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.copy-btn:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-glow);
}

.clear-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.clear-btn:hover {
    border-color: var(--error);
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

/* ============================================
   AdSense Placeholders
   ============================================ */
.ad-placeholder {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.ad-placeholder span {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-column h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-column a {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    padding: var(--spacing-xs) 0;
    transition: all var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent-primary);
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.footer-disclaimer {
    margin-top: var(--spacing-sm);
    font-size: 12px;
}

/* ============================================
   Toast Notification
   ============================================ */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success);
    color: var(--bg-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: var(--z-toast);
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

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

/* ============================================
   Help Modal & FAQ Styles
   ============================================ */
.help-section {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.help-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--accent-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.help-toggle-btn:hover {
    border-color: var(--accent-primary);
    background: rgba(34, 211, 238, 0.1);
    box-shadow: var(--shadow-glow-sm);
}

.help-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: var(--z-modal);
    overflow-y: auto;
    padding: var(--spacing-lg);
    animation: fadeIn 0.3s ease;
}

.help-modal.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.help-modal-content {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.help-close-btn {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 32px;
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

.help-close-btn:hover {
    color: var(--text-primary);
}

.help-section-content {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.help-section-content:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.help-section-content h2 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

/* Steps List */
.steps-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.step-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    color: var(--bg-primary);
    font-weight: 700;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.step-content h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Keyboard Shortcuts */
.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.shortcut-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    text-align: center;
}

.shortcut-item kbd {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--accent-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin: 2px;
    box-shadow: 0 2px 0 var(--border-color);
}

.shortcut-item span {
    margin-top: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* FAQ Accordion */
.faq-section {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.faq-item {
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-tertiary);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    background: rgba(34, 211, 238, 0.1);
}

.faq-icon {
    font-size: var(--font-size-lg);
    color: var(--accent-primary);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
    margin-left: var(--spacing-md);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p,
.faq-answer ul {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

.faq-answer ul {
    padding-left: var(--spacing-lg);
}

.faq-answer li {
    margin-bottom: var(--spacing-xs);
}

.faq-answer a {
    color: var(--accent-primary);
}

/* Tips Section */
.tips-section {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.tip-card {
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-fast);
}

.tip-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.tip-icon {
    font-size: 32px;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.tip-card h4 {
    color: var(--text-primary);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

.tip-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    margin: 0;
}

.tip-card kbd {
    display: inline-block;
    padding: 2px 6px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--accent-primary);
    font-size: 11px;
    font-weight: 500;
}

/* ============================================
   Page-Specific Styles
   ============================================ */
.page-content {
    padding: var(--spacing-2xl) 0;
}

.page-content h1 {
    margin-bottom: var(--spacing-md);
}

.page-content h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.page-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.page-content ul,
.page-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

.page-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.page-content .highlight-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.page-content .highlight-box h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.contact-form {
    max-width: 600px;
    margin-top: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    outline: none;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--accent-primary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--bg-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.submit-btn:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    /* Header */
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-nav {
        display: block;
    }
    
    /* Typography */
    h1 { font-size: var(--font-size-2xl); }
    h2 { font-size: var(--font-size-xl); }
    
    /* Hero */
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    /* Tool Tabs */
    .tool-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--spacing-md);
        -webkit-overflow-scrolling: touch;
    }
    
    .tool-tab {
        flex-shrink: 0;
    }
    
    /* IO Section */
    .io-section {
        flex-direction: column;
    }
    
    .io-arrows {
        transform: rotate(90deg);
        padding: var(--spacing-sm);
    }
    
    .io-box textarea {
        min-height: 150px;
    }
    
    /* Tool Actions */
    .tool-actions {
        flex-direction: column;
    }
    
    .action-btn {
        width: 100%;
        text-align: center;
    }
    
    /* Counter Stats */
    .counter-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-column:last-child {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-value {
        font-size: var(--font-size-xl);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-column:last-child {
        grid-column: auto;
    }
    
    .tool-footer {
        flex-direction: column;
    }
    
    .copy-btn,
    .clear-btn {
        width: 100%;
        text-align: center;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.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;
}

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

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

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

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

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

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

/* ============================================
   Selection
   ============================================ */
::selection {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

/* ============================================
   Focus Visible
   ============================================ */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .header,
    .footer,
    .tool-tabs,
    .tool-actions,
    .tool-footer,
    .ad-placeholder {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .io-box textarea {
        border: 1px solid #ccc;
        background: white;
        color: black;
    }
}

/* ============================================
   NEW ANIMATIONS & ENHANCEMENTS
   ============================================ */

/* Button Ripple Effect */
@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

.ripple-effect {
    position: relative;
    overflow: hidden;
}

.ripple-effect::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    animation: ripple 0.6s ease-out;
    pointer-events: none;
}

/* Success Pulse Animation */
@keyframes successPulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
    }
    70% {
        transform: scale(1.05);
        box-shadow: 0 0 0 15px rgba(34, 197, 94, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(34, 197, 94, 0);
    }
}

.success-pulse {
    animation: successPulse 0.6s ease-out;
}

/* Error Shake Animation */
@keyframes errorShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.error-shake {
    animation: errorShake 0.5s ease-in-out;
    border-color: var(--error) !important;
}

/* Counter Count-Up Animation */
@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.count-up {
    animation: countUp 0.3s ease-out;
}

/* Loading Dots Animation */
@keyframes loadingDots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

.loading-dots::after {
    content: '';
    animation: loadingDots 1.5s infinite;
}

/* Button Press Animation */
@keyframes buttonPress {
    0% { transform: scale(1); }
    50% { transform: scale(0.95); }
    100% { transform: scale(1); }
}

.btn-pressed {
    animation: buttonPress 0.15s ease-in-out;
}

/* Glow Pulse Animation */
@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 0 5px var(--accent-primary), 0 0 10px var(--accent-primary);
    }
    50% {
        box-shadow: 0 0 20px var(--accent-primary), 0 0 30px var(--accent-primary);
    }
}

.glow-pulse {
    animation: glowPulse 2s ease-in-out infinite;
}

/* Slide In Up Animation */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-up {
    animation: slideInUp 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Slide In Left Animation */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Slide In Right Animation */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Fade In Scale Animation */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fade-in-scale {
    animation: fadeInScale 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Bounce In Animation */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.bounce-in {
    animation: bounceIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Shimmer Effect for Loading */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.shimmer {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 0%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* Hover Lift Effect */
.hover-lift {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(34, 211, 238, 0.2);
}

/* Icon Rotation */
@keyframes iconRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.icon-rotate {
    animation: iconRotate 0.5s ease-out;
}

.icon-rotate:hover {
    animation: iconRotate 0.5s ease-in-out;
}

/* Magnetic Button Effect */
.magnetic {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.magnetic:hover {
    transform: scale(1.05);
}

/* Spotlight Effect */
.spotlight {
    position: relative;
}

.spotlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(34, 211, 238, 0.1) 0%,
        transparent 50%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.spotlight:hover::before,
.spotlight.active::before {
    opacity: 1;
}

/* Text Gradient Animation */
@keyframes textGradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.text-gradient-animate {
    background: linear-gradient(135deg, #22D3EE 0%, #38BDF8 50%, #67E8F9 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textGradientShift 3s ease infinite;
}

/* Floating Animation */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.float {
    animation: float 3s ease-in-out infinite;
}

/* Wave Animation for Footer Links */
.footer-column a {
    position: relative;
    overflow: hidden;
}

.footer-column a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.footer-column a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Tool Tab Underline Animation */
.tool-tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
    border-radius: 2px;
}

.tool-tab:hover::after,
.tool-tab.active::after {
    width: 80%;
}

/* Textarea Focus Glow Enhancement */
.io-box textarea:focus {
    box-shadow: 
        0 0 0 1px var(--border-color),
        0 0 20px rgba(34, 211, 238, 0.2),
        inset 0 0 0 1px rgba(34, 211, 238, 0.1);
}

/* Copy Button Enhanced */
.copy-btn.success {
    background: var(--success);
    color: var(--bg-primary);
    animation: successPulse 0.6s ease-out;
}

/* Notification Badge */
.notification-badge {
    position: relative;
}

.notification-badge::after {
    content: '';
    position: absolute;
    top: -5px;
    right: -5px;
    width: 10px;
    height: 10px;
    background: var(--error);
    border-radius: 50%;
    border: 2px solid var(--bg-primary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.2); }
}

/* Enhanced Toast Animation */
.toast {
    transform: translateX(-50%) translateY(100px) scale(0.9);
}

.toast.show {
    transform: translateX(-50%) translateY(0) scale(1);
}

.toast.hide {
    transform: translateX(-50%) translateY(-50px) scale(0.9);
    opacity: 0;
}

/* Stagger Animation Classes */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* Parallax Background */
.parallax-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(
        ellipse at 50% 0%,
        rgba(34, 211, 238, 0.08) 0%,
        transparent 50%
    );
    pointer-events: none;
}

/* Card Inner Glow */
.card-glow {
    position: relative;
}

.card-glow::before {
    content: '';
    position: absolute;
    inset: 0;
    padding: 1px;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.3), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card-glow:hover::before {
    opacity: 1;
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent-primary);
    animation: spin 0.8s linear infinite;
}

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

/* Blinking Cursor for Empty State */
@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.blinking-cursor::after {
    content: '|';
    animation: blink 1s step-end infinite;
}

/* Reveal on Scroll */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 25%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

/* Tool Panel Loading State */
.tool-panel.loading {
    pointer-events: none;
    opacity: 0.6;
}

.tool-panel.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Responsive Animation Adjustments */
@media (max-width: 768px) {
    .hover-lift:hover {
        transform: none;
        box-shadow: none;
    }
    
    .magnetic:hover {
        transform: none;
    }
    
    /* Reduce motion for users who prefer it */
    @media (prefers-reduced-motion: reduce) {
        * {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
    }
}

/* Print - Hide animated elements */
@media print {
    .hero::before,
    .toast,
    .ripple-effect::after {
        display: none !important;
    }
}