/* ===================================
   OptiPDF - Global Styles
   =================================== */

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

:root {
    /* Brand Colors */
    --primary-accent: #00E1FF;
    --background: #020617;
    --card-bg: #0B1220;
    --primary-text: #F8FAFC;
    --secondary-text: #94A3B8;
    --border-color: #1E293B;
    
    /* Additional Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --hover-bg: #1E293B;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Shadows */
    --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);
    --shadow-glow: 0 0 20px rgba(0, 225, 255, 0.3);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Animation Timings */
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   Animations & Keyframes
   =================================== */

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

/* ===================================
   Global Styles with Animations
   =================================== */

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

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Page load animation */
body {
    animation: fadeIn 0.6s var(--ease-smooth);
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 3rem;
    font-weight: 800;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.875rem;
}

h4 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-text);
}

a {
    color: var(--primary-accent);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: #00B8D4;
}

/* ===================================
   Layout Components
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-2xl) 0;
}

/* ===================================
   Header & Navigation
   =================================== */

.header {
    background: rgba(11, 18, 32, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: transform var(--transition-normal) var(--ease-smooth);
}

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

.logo {
    height: 48px;
    width: auto;
    transition: transform var(--transition-normal) var(--ease-smooth);
}

.logo-container:hover .logo {
    transform: rotate(-5deg);
}

.brand-name {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-accent) 0%, #00B8D4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-normal) var(--ease-smooth);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--secondary-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-accent);
    background: var(--hover-bg);
}

/* Special active state for Tools link when on homepage */
.nav-link.active-tools {
    color: var(--primary-accent);
    background: transparent;
    border: 2px solid var(--primary-accent);
    border-radius: var(--radius-md);
}

.nav-link.active-tools:hover {
    background: var(--hover-bg);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--primary-text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ===================================
   Breadcrumb Navigation
   =================================== */

.breadcrumb {
    background: rgba(11, 18, 32, 0.5);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    list-style: none;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--secondary-text);
    font-size: 0.875rem;
}

.breadcrumb-item a {
    color: var(--secondary-text);
    transition: all 0.3s ease;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

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

.breadcrumb-item.active {
    color: var(--primary-accent);
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--border-color);
    margin: 0 0.25rem;
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeIn 0.8s var(--ease-smooth);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-text) 0%, var(--primary-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s var(--ease-smooth) 0.2s backwards;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--secondary-text);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1s var(--ease-smooth) 0.4s backwards;
}

.hero .btn {
    animation: fadeInUp 1s var(--ease-smooth) 0.6s backwards;
}

.floating-icons {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-icon {
    position: absolute;
    color: var(--primary-accent);
    opacity: 0.1;
    animation: float 20s infinite ease-in-out;
}

.floating-icon:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
.floating-icon:nth-child(2) { top: 20%; right: 15%; animation-delay: 2s; }
.floating-icon:nth-child(3) { bottom: 15%; left: 20%; animation-delay: 4s; }
.floating-icon:nth-child(4) { bottom: 20%; right: 10%; animation-delay: 6s; }
.floating-icon:nth-child(5) { top: 50%; left: 5%; animation-delay: 8s; }
.floating-icon:nth-child(6) { top: 60%; right: 8%; animation-delay: 10s; }
.floating-icon:nth-child(7) { top: 30%; left: 15%; animation-delay: 12s; }
.floating-icon:nth-child(8) { bottom: 25%; right: 18%; animation-delay: 14s; }
.floating-icon:nth-child(9) { top: 70%; left: 12%; animation-delay: 16s; }
.floating-icon:nth-child(10) { top: 40%; right: 12%; animation-delay: 18s; }
.floating-icon:nth-child(11) { bottom: 35%; left: 8%; animation-delay: 20s; }
.floating-icon:nth-child(12) { top: 80%; right: 20%; animation-delay: 22s; }

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(5deg); }
    50% { transform: translateY(-40px) rotate(-5deg); }
    75% { transform: translateY(-20px) rotate(3deg); }
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal) var(--ease-smooth);
    border: none;
    font-size: 1rem;
    font-family: var(--font-family);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-accent) 0%, #00B8D4 100%);
    color: var(--background);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0, 225, 255, 0.4), 0 0 40px rgba(0, 225, 255, 0.2);
}

.btn-primary:active {
    transform: translateY(-1px) scale(0.98);
}

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

.btn-secondary:hover {
    background: var(--hover-bg);
    border-color: var(--primary-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

/* ===================================
   Cards
   =================================== */

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal) var(--ease-smooth);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 225, 255, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-normal) var(--ease-smooth);
    pointer-events: none;
}

.card:hover {
    border-color: var(--primary-accent);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 225, 255, 0.15), 0 0 30px rgba(0, 225, 255, 0.1);
}

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

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-accent) 0%, #00B8D4 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--background);
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal) var(--ease-smooth);
}

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

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-text);
}

.card-description {
    color: var(--secondary-text);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===================================
   Tools Grid
   =================================== */

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.tool-card {
    position: relative;
    animation: fadeInUp 0.6s var(--ease-smooth) backwards;
}

/* Staggered animation for tool cards */
.tool-card:nth-child(1) { animation-delay: 0.1s; }
.tool-card:nth-child(2) { animation-delay: 0.2s; }
.tool-card:nth-child(3) { animation-delay: 0.3s; }
.tool-card:nth-child(4) { animation-delay: 0.4s; }
.tool-card:nth-child(5) { animation-delay: 0.5s; }
.tool-card:nth-child(6) { animation-delay: 0.6s; }

.free-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--success);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    animation: pulse 2s infinite;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

/* ===================================
   Benefits Section
   =================================== */

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.benefits-grid .card {
    animation: fadeInUp 0.6s var(--ease-smooth) backwards;
}

.benefits-grid .card:nth-child(1) { animation-delay: 0.2s; }
.benefits-grid .card:nth-child(2) { animation-delay: 0.3s; }
.benefits-grid .card:nth-child(3) { animation-delay: 0.4s; }
.benefits-grid .card:nth-child(4) { animation-delay: 0.5s; }

.benefit-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, rgba(0, 225, 255, 0.1) 0%, rgba(0, 184, 212, 0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-accent);
}

/* ===================================
   How It Works
   =================================== */

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    position: relative;
}

.step-item {
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-accent) 0%, #00B8D4 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--background);
}

/* ===================================
   Tool Page Styles
   =================================== */

.tool-page {
    padding: var(--spacing-xl) 0;
}

.tool-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.tool-header h1 {
    margin-bottom: var(--spacing-sm);
}

.tool-header .free-badge {
    margin: var(--spacing-sm) auto var(--spacing-md) auto;
}

.tool-header p {
    margin: 0 auto;
    line-height: 1.7;
}

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

.tool-interface {
    background: var(--card-bg);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: all 0.3s ease;
}

.tool-interface.dragover {
    border-color: var(--primary-accent);
    background: rgba(0, 225, 255, 0.05);
}

.upload-icon {
    font-size: 4rem;
    color: var(--primary-accent);
    margin-bottom: var(--spacing-md);
}

.file-input {
    display: none;
}

.file-list {
    width: 100%;
    margin-top: var(--spacing-md);
}

.file-item {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-name {
    color: var(--primary-text);
    font-size: 0.9rem;
}

.file-remove {
    background: none;
    border: none;
    color: var(--error);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.25rem;
}

.tool-info {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.tool-info h3 {
    margin-bottom: var(--spacing-md);
}

.tool-info p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.tool-info ul {
    list-style: none;
    padding-left: 0;
    margin: var(--spacing-sm) 0 var(--spacing-lg) 0;
}

.tool-info ul li {
    padding: var(--spacing-xs) 0;
    color: var(--secondary-text);
}

.privacy-notice {
    background: rgba(0, 225, 255, 0.1);
    border-left: 4px solid var(--primary-accent);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin: var(--spacing-lg) 0;
}

.privacy-notice i {
    color: var(--primary-accent);
    margin-right: var(--spacing-xs);
}

/* ===================================
   SEO Content Section
   =================================== */

.seo-content {
    max-width: 900px;
    margin: var(--spacing-2xl) auto;
    padding: var(--spacing-xl);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
}

.seo-content h2 {
    color: var(--primary-text);
    margin-top: var(--spacing-xl);
}

.seo-content h2:first-child {
    margin-top: 0;
}

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

.seo-content ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

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

.tool-info h4 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.internal-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    margin-bottom: 0;
}

.internal-link {
    background: var(--background);
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.internal-link:hover {
    border-color: var(--primary-accent);
    background: var(--hover-bg);
}

/* ===================================
   Form Styles
   =================================== */

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

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

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--primary-text);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(0, 225, 255, 0.1);
}

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

/* ===================================
   Footer
   =================================== */

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-text);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--secondary-text);
    transition: all 0.3s ease;
}

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

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-text);
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-accent);
    border-color: var(--primary-accent);
    color: var(--background);
}

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

/* ===================================
   Loading Spinner
   =================================== */

.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-accent);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-lg) auto;
}

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

/* ===================================
   Progress Bar
   =================================== */

.progress-container {
    width: 100%;
    background: var(--background);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin: var(--spacing-md) 0;
}

.progress-bar {
    height: 8px;
    background: linear-gradient(90deg, var(--primary-accent) 0%, #00B8D4 100%);
    border-radius: var(--radius-sm);
    transition: width 0.3s ease;
}

/* ===================================
   Alert Messages
   =================================== */

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin: var(--spacing-md) 0;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success);
    color: var(--success);
}

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

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--warning);
    color: var(--warning);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .hero h1 { font-size: 2.5rem; }
    
    .logo {
        height: 40px;
    }
    
    .brand-name {
        font-size: 1.5rem;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .breadcrumb-item {
        font-size: 0.8rem;
    }
    
    .breadcrumb-item a {
        padding: 0.2rem 0.4rem;
    }
    
    .tool-content {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    h1 { font-size: 1.75rem; }
    .hero h1 { font-size: 2rem; }
    
    .btn-large {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 1rem;
    }
}

/* ===================================
   Utility Classes
   =================================== */

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

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }

/* ===================================
   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);
    max-width: 400px;
}

.toast {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
    min-width: 300px;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast i {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.toast span {
    flex: 1;
    color: var(--primary-text);
    font-size: 0.95rem;
}

.toast-success {
    border-left: 4px solid var(--success);
}

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

.toast-error {
    border-left: 4px solid var(--error);
}

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

.toast-warning {
    border-left: 4px solid var(--warning);
}

.toast-warning i {
    color: var(--warning);
}

.toast-info {
    border-left: 4px solid var(--primary-accent);
}

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

.toast-download {
    border-left: 4px solid var(--primary-accent);
}

.toast-download i {
    color: var(--primary-accent);
}

.toast-processing {
    border-left: 4px solid var(--primary-accent);
}

.toast-processing i {
    color: var(--primary-accent);
}

@media (max-width: 768px) {
    .toast-container {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
    }
    
    .toast {
        min-width: auto;
    }
}