/* ========================================
   PDF NINJA — Core Stylesheet
   ======================================== */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

/* ---------- CSS Variables (Light) ---------- */
:root {
  --primary: #008080;
  --primary-light: #00B3B3;
  --primary-lighter: #00D1C1;
  --primary-dark: #006666;
  --primary-gradient: linear-gradient(135deg, #008080 0%, #00B3B3 50%, #00D1C1 100%);
  --primary-gradient-r: linear-gradient(135deg, #00D1C1 0%, #00B3B3 50%, #008080 100%);
  --bg: #ffffff;
  --bg-secondary: #f4f7f9;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #555770;
  --text-muted: #8a8ea8;
  --border: #e2e6ee;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --nav-bg: rgba(255,255,255,0.85);
  --modal-overlay: rgba(0,0,0,0.55);
  --toast-bg: #1a1a2e;
  --toast-text: #fff;
  --footer-bg: #0a1628;
  --footer-text: #c0c8d8;
  --glow: 0 0 20px rgba(0,179,179,0.35);
  --transition: 0.3s cubic-bezier(.4,0,.2,1);
}

/* ---------- Dark Mode ---------- */
[data-theme="dark"] {
  --bg: #0f1724;
  --bg-secondary: #151f30;
  --bg-card: #1a2538;
  --text: #e8ecf4;
  --text-secondary: #a0a8be;
  --text-muted: #6b7490;
  --border: #2a3550;
  --shadow: 0 4px 24px rgba(0,0,0,0.25);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.35);
  --nav-bg: rgba(15,23,36,0.9);
  --footer-bg: #080e18;
  --footer-text: #8090a8;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:'Inter',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden;transition:background var(--transition),color var(--transition)}
a{text-decoration:none;color:inherit;transition:color var(--transition)}
ul,ol{list-style:none}
img{max-width:100%;height:auto;display:block}
button,input,textarea,select{font-family:inherit;font-size:inherit;border:none;outline:none;background:none}
button{cursor:pointer}

/* ---------- Utility ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:100px 0}
.section-alt{background:var(--bg-secondary)}
.text-center{text-align:center}
.text-gradient{background:var(--primary-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* ---------- Typography ---------- */
h1,h2,h3,h4,h5,h6{font-family:'Poppins',sans-serif;font-weight:700;line-height:1.25}
h1{font-size:clamp(2rem,5vw,3.5rem)}
h2{font-size:clamp(1.6rem,3.5vw,2.5rem)}
h3{font-size:clamp(1.2rem,2.5vw,1.5rem)}
p{margin-bottom:1rem}

/* ---------- Scroll Progress Bar ---------- */
#scroll-progress{position:fixed;top:0;left:0;height:3px;background:var(--primary-gradient);z-index:10000;transition:width 0.1s linear;width:0}

/* ---------- Navbar ---------- */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:9999;background:var(--nav-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);transition:background var(--transition),box-shadow var(--transition)}
.navbar.scrolled{box-shadow:var(--shadow)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.nav-logo{display:flex;align-items:center;gap:10px;font-family:'Poppins',sans-serif;font-weight:800;font-size:1.5rem}
.nav-logo .logo-icon{width:38px;height:38px;border-radius:10px;background:var(--primary-gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem;font-weight:900}
.nav-logo span{background:var(--primary-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-weight:500;font-size:.95rem;position:relative;padding:4px 0;color:var(--text-secondary)}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--primary-gradient);transition:width var(--transition)}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}

/* Theme toggle */
.theme-toggle{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);border:1px solid var(--border);cursor:pointer;transition:all var(--transition);font-size:1.2rem}
.theme-toggle:hover{background:var(--primary);color:#fff;transform:rotate(30deg)}

/* Mobile nav */
.nav-hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;z-index:100}
.nav-hamburger span{width:26px;height:2.5px;background:var(--text);border-radius:2px;transition:all var(--transition)}
.nav-hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-hamburger.active span:nth-child(2){opacity:0}
.nav-hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:50px;font-weight:600;font-size:.95rem;transition:all var(--transition);position:relative;overflow:hidden}
.btn-primary{background:var(--primary-gradient);color:#fff;box-shadow:0 4px 16px rgba(0,128,128,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--glow)}
.btn-outline{border:2px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:10px 22px;font-size:.85rem}
.btn-icon{width:44px;height:44px;padding:0;justify-content:center;border-radius:50%}

/* ---------- Hero Section ---------- */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;padding-top:100px}
.hero-bg{position:absolute;inset:0;background:var(--primary-gradient);opacity:.06;z-index:0}
.hero-shapes{position:absolute;inset:0;z-index:0;overflow:hidden}
.hero-shape{position:absolute;border-radius:50%;background:var(--primary-gradient);opacity:.08;animation:floatShape 8s ease-in-out infinite}
.hero-shape:nth-child(1){width:300px;height:300px;top:-50px;right:-80px;animation-delay:0s}
.hero-shape:nth-child(2){width:200px;height:200px;bottom:10%;left:-60px;animation-delay:2s}
.hero-shape:nth-child(3){width:150px;height:150px;top:40%;right:10%;animation-delay:4s}
@keyframes floatShape{0%,100%{transform:translateY(0) rotate(0deg)}50%{transform:translateY(-30px) rotate(10deg)}}
.hero-content{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-text h1{margin-bottom:20px}
.hero-text p{font-size:1.15rem;color:var(--text-secondary);margin-bottom:32px;max-width:520px}
.hero-buttons{display:flex;gap:16px;flex-wrap:wrap}
.hero-illustration{display:flex;align-items:center;justify-content:center}
.hero-visual{width:100%;max-width:460px;aspect-ratio:1;border-radius:24px;background:var(--primary-gradient);position:relative;display:flex;align-items:center;justify-content:center;box-shadow:0 24px 80px rgba(0,128,128,0.2)}
.hero-visual::before{content:'';position:absolute;inset:3px;border-radius:22px;background:var(--bg);z-index:0}
.hero-visual-inner{position:relative;z-index:1;text-align:center;padding:40px}
.hero-visual-inner .pdf-icon{font-size:5rem;margin-bottom:16px}
.hero-visual-inner p{font-size:1.1rem;font-weight:600;color:var(--text)}

/* ---------- Features ---------- */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:32px;margin-top:48px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:36px;transition:all var(--transition)}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.feature-icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,rgba(0,128,128,.1),rgba(0,209,193,.15));display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:18px;color:var(--primary)}
.feature-card h3{margin-bottom:10px}
.feature-card p{color:var(--text-secondary);font-size:.95rem;margin-bottom:0}

/* ---------- Tool Cards Grid ---------- */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;margin-top:48px}
.tool-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;text-align:center;cursor:pointer;transition:all var(--transition);position:relative;overflow:hidden}
.tool-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--primary-gradient);transform:scaleX(0);transition:transform var(--transition)}
.tool-card:hover::before{transform:scaleX(1)}
.tool-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.tool-card-icon{width:64px;height:64px;margin:0 auto 18px;border-radius:16px;background:linear-gradient(135deg,rgba(0,128,128,.1),rgba(0,209,193,.15));display:flex;align-items:center;justify-content:center;font-size:1.7rem;color:var(--primary);transition:all var(--transition)}
.tool-card:hover .tool-card-icon{background:var(--primary-gradient);color:#fff;transform:scale(1.08)}
.tool-card h3{font-size:1.05rem;margin-bottom:8px}
.tool-card p{font-size:.85rem;color:var(--text-muted);margin-bottom:0}

/* ---------- Stats / Counters ---------- */
.stats-bar{background:var(--primary-gradient);padding:60px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center;color:#fff}
.stat-number{font-family:'Poppins',sans-serif;font-size:2.5rem;font-weight:800;margin-bottom:4px}
.stat-label{font-size:.95rem;opacity:.85}

/* ---------- Testimonials ---------- */
.testimonials-slider{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:28px;margin-top:48px}
.testimonial-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;transition:all var(--transition)}
.testimonial-card:hover{box-shadow:var(--shadow-lg)}
.testimonial-stars{color:#f4b400;margin-bottom:12px;font-size:1.1rem}
.testimonial-text{font-style:italic;color:var(--text-secondary);margin-bottom:18px;font-size:.95rem}
.testimonial-author{display:flex;align-items:center;gap:12px}
.testimonial-avatar{width:44px;height:44px;border-radius:50%;background:var(--primary-gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1rem}
.testimonial-name{font-weight:600;font-size:.95rem}
.testimonial-role{font-size:.8rem;color:var(--text-muted)}

/* ---------- FAQ ---------- */
.faq-list{max-width:800px;margin:48px auto 0;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:all var(--transition)}
.faq-item.active{border-color:var(--primary-light)}
.faq-question{padding:20px 24px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-weight:600;gap:16px}
.faq-question .faq-icon{font-size:1.2rem;transition:transform var(--transition);flex-shrink:0;color:var(--primary)}
.faq-item.active .faq-icon{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease}
.faq-answer-inner{padding:0 24px 20px;color:var(--text-secondary);font-size:.95rem;line-height:1.8}

/* ---------- SEO Content ---------- */
.seo-content{line-height:1.85}
.seo-content h2{margin:40px 0 16px;color:var(--primary)}
.seo-content h3{margin:28px 0 12px}
.seo-content p{color:var(--text-secondary)}
.seo-content ul{padding-left:20px;margin-bottom:16px}
.seo-content ul li{position:relative;padding-left:20px;margin-bottom:8px;color:var(--text-secondary)}
.seo-content ul li::before{content:'✓';position:absolute;left:0;color:var(--primary);font-weight:700}

/* ---------- Modal ---------- */
.modal-overlay{position:fixed;inset:0;background:var(--modal-overlay);z-index:10000;display:none;align-items:center;justify-content:center;padding:24px;opacity:0;transition:opacity .3s ease}
.modal-overlay.active{display:flex;opacity:1}
.modal{background:var(--bg);border-radius:var(--radius);width:100%;max-width:640px;max-height:90vh;overflow-y:auto;position:relative;box-shadow:var(--shadow-lg);animation:modalIn .35s ease}
@keyframes modalIn{from{transform:translateY(30px) scale(.96);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:24px 28px;border-bottom:1px solid var(--border)}
.modal-header h2{font-size:1.3rem;margin:0}
.modal-close{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);cursor:pointer;transition:all var(--transition);font-size:1.2rem}
.modal-close:hover{background:var(--primary);color:#fff}
.modal-body{padding:28px}

/* Drop zone */
.drop-zone{border:2px dashed var(--border);border-radius:var(--radius-sm);padding:48px 24px;text-align:center;transition:all var(--transition);cursor:pointer;background:var(--bg-secondary)}
.drop-zone.dragover{border-color:var(--primary);background:rgba(0,128,128,.05)}
.drop-zone-icon{font-size:2.5rem;margin-bottom:12px;color:var(--primary)}
.drop-zone p{color:var(--text-secondary);margin-bottom:8px}
.drop-zone .drop-zone-hint{font-size:.8rem;color:var(--text-muted)}

/* File list */
.file-list{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.file-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--bg-secondary);border-radius:var(--radius-xs);font-size:.9rem}
.file-item-name{display:flex;align-items:center;gap:8px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:70%}
.file-item-remove{cursor:pointer;color:var(--text-muted);transition:color var(--transition)}
.file-item-remove:hover{color:#e74c3c}

/* Tool options */
.tool-options{margin-top:20px;display:flex;flex-direction:column;gap:14px}
.tool-options label{font-weight:500;font-size:.9rem;display:flex;flex-direction:column;gap:6px}
.tool-options input,.tool-options select,.tool-options textarea{padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius-xs);background:var(--bg);color:var(--text);transition:border-color var(--transition)}
.tool-options input:focus,.tool-options select:focus,.tool-options textarea:focus{border-color:var(--primary)}

/* Progress */
.progress-bar{width:100%;height:8px;background:var(--bg-secondary);border-radius:8px;overflow:hidden;margin-top:16px;display:none}
.progress-bar.active{display:block}
.progress-fill{height:100%;background:var(--primary-gradient);border-radius:8px;width:0;transition:width .3s ease}

/* Process btn */
.tool-process-btn{margin-top:20px;width:100%}

/* ---------- Toast ---------- */
.toast-container{position:fixed;bottom:28px;right:28px;z-index:11000;display:flex;flex-direction:column;gap:10px}
.toast{padding:16px 24px;border-radius:var(--radius-sm);background:var(--toast-bg);color:var(--toast-text);font-size:.9rem;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:10px;animation:toastIn .4s ease;min-width:280px}
.toast.success{border-left:4px solid #2ecc71}
.toast.error{border-left:4px solid #e74c3c}
.toast.info{border-left:4px solid var(--primary)}
@keyframes toastIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* ---------- Footer ---------- */
.footer{background:var(--footer-bg);color:var(--footer-text);padding:80px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px}
.footer-col h4{color:#fff;font-family:'Poppins',sans-serif;margin-bottom:20px;font-size:1.05rem}
.footer-col p{font-size:.9rem;line-height:1.7}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:var(--footer-text);font-size:.9rem;transition:all var(--transition)}
.footer-col ul li a:hover{color:var(--primary-lighter);padding-left:4px}
.footer-social{display:flex;gap:12px;margin-top:8px}
.footer-social a{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.15);display:flex;align-items:center;justify-content:center;color:var(--footer-text);transition:all var(--transition);font-size:1rem}
.footer-social a:hover{background:var(--primary-gradient);border-color:transparent;color:#fff;transform:translateY(-3px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:48px;padding:24px 0;display:flex;align-items:center;justify-content:space-between;font-size:.85rem}

/* Back to top */
.back-to-top{position:fixed;bottom:28px;left:28px;width:48px;height:48px;border-radius:50%;background:var(--primary-gradient);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:var(--shadow);cursor:pointer;z-index:9000;opacity:0;transform:translateY(20px);transition:all var(--transition);pointer-events:none}
.back-to-top.visible{opacity:1;transform:translateY(0);pointer-events:auto}
.back-to-top:hover{transform:translateY(-3px);box-shadow:var(--glow)}

/* ---------- Page header (inner pages) ---------- */
.page-header{padding:140px 0 80px;background:var(--bg-secondary);text-align:center;position:relative;overflow:hidden}
.page-header::before{content:'';position:absolute;inset:0;background:var(--primary-gradient);opacity:.04}
.page-header h1{margin-bottom:12px}
.page-header p{color:var(--text-secondary);max-width:600px;margin:0 auto}

/* ---------- Content Page ---------- */
.content-page{padding:80px 0}
.content-page .content-wrap{max-width:820px;margin:0 auto}
.content-page h2{margin:36px 0 14px;color:var(--primary)}
.content-page h3{margin:24px 0 10px}
.content-page p,.content-page li{color:var(--text-secondary);line-height:1.85;font-size:.95rem}
.content-page ul{padding-left:20px;margin-bottom:16px}
.content-page ul li{margin-bottom:6px;padding-left:16px;position:relative}
.content-page ul li::before{content:'•';position:absolute;left:0;color:var(--primary);font-weight:700}

/* ---------- Contact Form ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;margin-top:48px}
.contact-form{display:flex;flex-direction:column;gap:18px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-weight:600;font-size:.9rem}
.form-group input,.form-group textarea{padding:14px 18px;border:1px solid var(--border);border-radius:var(--radius-xs);background:var(--bg);color:var(--text);transition:all var(--transition)}
.form-group input:focus,.form-group textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,128,128,.1)}
.form-group .error-msg{color:#e74c3c;font-size:.8rem;display:none}
.form-group.error input,.form-group.error textarea{border-color:#e74c3c}
.form-group.error .error-msg{display:block}

/* ---------- Animations ---------- */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* Loading spinner */
.spinner{display:inline-block;width:20px;height:20px;border:2.5px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Page Preview Grid ---------- */
.page-preview-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px;margin-top:16px;max-height:320px;overflow-y:auto;padding:4px}
.page-preview-item{position:relative;border:2px solid var(--border);border-radius:var(--radius-xs);overflow:hidden;cursor:pointer;transition:all var(--transition);aspect-ratio:3/4;background:var(--bg-secondary)}
.page-preview-item:hover{border-color:var(--primary-light);transform:translateY(-2px)}
.page-preview-item.selected{border-color:var(--primary);box-shadow:0 0 0 2px rgba(0,128,128,.25)}
.page-preview-item canvas{width:100%;height:100%;object-fit:contain;display:block}
.page-preview-label{position:absolute;bottom:0;left:0;right:0;background:rgba(0,0,0,.6);color:#fff;font-size:.7rem;text-align:center;padding:3px;font-weight:600}
.page-preview-check{position:absolute;top:4px;right:4px;width:22px;height:22px;border-radius:50%;background:var(--primary-gradient);color:#fff;display:none;align-items:center;justify-content:center;font-size:.7rem}
.page-preview-item.selected .page-preview-check{display:flex}
.preview-heading{font-weight:600;font-size:.9rem;margin-top:16px;margin-bottom:4px;color:var(--text)}

/* Compression options */
.compress-options{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.compress-opt{flex:1;min-width:100px;padding:14px 10px;border:2px solid var(--border);border-radius:var(--radius-xs);text-align:center;cursor:pointer;transition:all var(--transition);background:var(--bg)}
.compress-opt:hover{border-color:var(--primary-light)}
.compress-opt.active{border-color:var(--primary);background:rgba(0,128,128,.08)}
.compress-opt-title{font-weight:700;font-size:.85rem;margin-bottom:2px}
.compress-opt-desc{font-size:.72rem;color:var(--text-muted)}

/* Rotate preview */
.rotate-preview-wrap{display:flex;align-items:center;justify-content:center;margin-top:16px;padding:16px;background:var(--bg-secondary);border-radius:var(--radius-sm);min-height:200px}
.rotate-preview-wrap canvas{max-width:100%;max-height:260px;transition:transform .4s ease;border-radius:4px;box-shadow:var(--shadow)}

/* ---------- Section titles ---------- */
.section-title{text-align:center;margin-bottom:16px}
.section-subtitle{text-align:center;color:var(--text-secondary);max-width:600px;margin:0 auto;font-size:1.05rem}