/* ULTRA PREMIUM PDF WEBSITE DESIGN */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #8b5cf6;
    --secondary: #f59e0b;
    --accent: #10b981;
    --danger: #ef4444;
    --dark: #1e293b;
    --darker: #0f172a;
    --light: #f8fafc;
    --gray: #64748b;
    --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-secondary: linear-gradient(135deg, #f59e0b, #f97316);
    --gradient-accent: linear-gradient(135deg, #10b981, #34d399);
    --gradient-dark: linear-gradient(135deg, #1e293b, #334155);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.7;
    color: var(--dark);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* GLASS MORPHISM HEADER */
.header {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(45deg, #fff, #e2e8f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.logo i {
    font-size: 2.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 3rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    position: relative;
    overflow: hidden;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-links a.active {
    background: var(--gradient-primary);
    box-shadow: var(--shadow-md);
}

/* SPECTACULAR HERO SECTION */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    padding: 0 5%;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
    animation: float 6s ease-in-out infinite;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.hero h1 {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: 2rem;
    line-height: 1.1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    background: linear-gradient(45deg, #fff, #f0f4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 3rem;
    opacity: 0.9;
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 18px 40px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.2rem;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

/* ANIMATED TOOLS GRID */
.tools-section {
    padding: 8rem 5%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 5rem;
    font-size: 3.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: var(--gradient-primary);
    border-radius: 3px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

.tool-card {
    background: white;
    border-radius: 25px;
    padding: 3rem 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-decoration: none;
    color: inherit;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.tool-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: var(--shadow-xl);
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-icon {
    font-size: 4rem;
    margin-bottom: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    transition: all 0.3s ease;
}

.tool-card:hover .tool-icon {
    transform: scale(1.2) rotate(10deg);
}

.tool-card h3 {
    margin-bottom: 1.5rem;
    color: var(--dark);
    font-size: 1.6rem;
    font-weight: 700;
}

.tool-card p {
    color: var(--gray);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.tool-cta {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.tool-card:hover .tool-cta {
    transform: translateX(10px);
    color: var(--primary-dark);
}

/* FEATURES SECTION */
.features {
    padding: 8rem 5%;
    background: var(--gradient-dark);
    color: white;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature {
    padding: 3rem 2rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
}

.feature i {
    font-size: 3.5rem;
    margin-bottom: 2rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.feature p {
    opacity: 0.9;
    line-height: 1.6;
    font-size: 1.1rem;
}

/* TOOL PAGES */
.tool-hero {
    background: var(--gradient-primary);
    color: white;
    padding: 160px 5% 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.tool-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><circle fill="rgba(255,255,255,0.1)" cx="200" cy="200" r="100"/><circle fill="rgba(255,255,255,0.05)" cx="800" cy="300" r="150"/></svg>');
}

.tool-hero-content {
    position: relative;
    z-index: 2;
}

.tool-hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.tool-hero p {
    font-size: 1.4rem;
    opacity: 0.9;
    font-weight: 300;
}

.tool-container {
    max-width: 1000px;
    margin: 4rem auto;
    padding: 0 5%;
}

.upload-area {
    border: 3px dashed rgba(99, 102, 241, 0.3);
    border-radius: 30px;
    padding: 5rem 4rem;
    text-align: center;
    background: white;
    margin-bottom: 3rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upload-area:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.upload-area i {
    font-size: 5rem;
    margin-bottom: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 2;
}

.upload-area h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--dark);
    position: relative;
    z-index: 2;
}

.upload-area p {
    color: var(--gray);
    font-size: 1.1rem;
    position: relative;
    z-index: 2;
}

.file-list {
    margin: 3rem 0;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: white;
    border-radius: 20px;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-md);
    border-left: 5px solid var(--primary);
    transition: transform 0.2s ease;
}

.file-item:hover {
    transform: translateX(10px);
}

/* ANIMATIONS */
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

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

.floating {
    animation: float 6s ease-in-out infinite;
}

.success-result {
    animation: successPulse 2s ease-in-out;
}

/* FOOTER */
.footer {
    background: var(--darker);
    color: white;
    padding: 4rem 5% 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer h3 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer p {
    margin-bottom: 1rem;
    opacity: 0.8;
    font-size: 1.1rem;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 2rem;
        padding: 1rem 5%;
    }
    
    .nav-links {
        gap: 1.5rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .tool-hero h1 {
        font-size: 2.8rem;
    }
    
    .upload-area {
        padding: 3rem 2rem;
    }
}

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

.fa-spinner {
    animation: spin 1s linear infinite;
}