/*
Theme Name: FreePDF Pro
Description: Professional PDF converter site
Version: 3.0.0
Author: FreePDF Team
*/

:root {
    --primary: #4F46E5;
    --secondary: #7C3AED;
    --dark: #1F2937;
    --light: #F9FAFB;
    --success: #10B981;
    --error: #EF4444;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: linear-gradient(135deg, #F9FAFB 0%, #EFF6FF 100%);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo { 
    font-size: 1.5rem; 
    font-weight: 700; 
    color: var(--primary);
    text-decoration: none;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.main-nav a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

.main-nav a:hover { color: var(--primary); }

/* Hero */
.hero {
    text-align: center;
    padding: 4rem 2rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    color: var(--dark);
}

.hero p {
    font-size: 1.25rem;
    color: #6B7280;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform 0.3s;
}

.btn:hover { transform: translateY(-2px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Converter */
.converter {
    max-width: 800px;
    margin: 2rem auto;
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.upload-zone {
    border: 3px dashed #D1D5DB;
    border-radius: 15px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--light);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(79, 70, 229, 0.05);
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.file-list {
    margin-top: 2rem;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--light);
    border-radius: 10px;
    margin-bottom: 0.5rem;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-icon {
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.75rem;
}

.btn-remove {
    padding: 0.5rem 1rem;
    background: #EF4444;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.btn-convert {
    width: 100%;
    margin-top: 2rem;
    padding: 1.25rem;
    font-size: 1.1rem;
}

/* Loading */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-overlay.active { display: flex; }

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Footer */
.site-footer {
    background: var(--dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 { margin-bottom: 1rem; }

.footer-section a {
    color: #D1D5DB;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
}

.footer-section a:hover { color: white; }

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #9CA3AF;
}

/* Page Content */
.page-content {
    max-width: 900px;
    margin: 2rem auto;
    padding: 3rem;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.page-content h1 {
    margin-bottom: 2rem;
    color: var(--primary);
}

.page-content h2 {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.page-content p {
    margin-bottom: 1rem;
}

.page-content ul {
    margin: 1rem 0 1rem 2rem;
}

/* Mobile */
@media (max-width: 768px) {
    .main-nav { display: none; }
    .hero { padding: 2rem 1rem; }
    .converter { margin: 1rem; padding: 1.5rem; }
}