:root {
  --bg: #080b10;
  --bg-2: #0d1117;
  --bg-3: #141920;
  --surface: #161c26;
  --surface-2: #1e2736;
  --border: rgba(255,255,255,0.07);
  --border-bright: rgba(255,255,255,0.13);
  --accent: #00e87a;
  --accent-dim: rgba(0,232,122,0.15);
  --accent-dark: #00c068;
  --text: #f0f4f8;
  --text-2: #8a96a8;
  --text-3: #5a6478;
  --error: #ef4444;
  --radius: 14px;
  --radius-sm: 8px;
  --header-h: 68px;
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'DM Sans',sans-serif; background:var(--bg); color:var(--text); line-height:1.6; }
.container { max-width:1160px; margin:0 auto; padding:0 24px; }
.site-header { position:fixed; top:0; left:0; right:0; height:var(--header-h); background:rgba(8,11,16,0.85); backdrop-filter:blur(20px); border-bottom:1px solid var(--border); z-index:100; display:flex; align-items:center; justify-content:space-between; }
.ad-banner-visible .site-header { top:45px; } /* Move header down when ad is visible */
.logo { display:flex; align-items:center; gap:8px; text-decoration:none; font-family:'Syne',sans-serif; font-weight:800; font-size:20px; color:var(--text); }
.logo-icon { font-size:22px; filter:drop-shadow(0 0 8px var(--accent)); }
.logo-dot { color:var(--accent); }
.btn-primary { padding:6px 12px; border-radius:var(--radius-sm); border:1px solid var(--accent); background:none; color:var(--accent); font-weight:500; font-size:14px; text-decoration:none; transition:0.2s; display:inline-flex; align-items:center; gap:4px; }
.btn-primary:hover { background:var(--accent); color:var(--bg); }
.btn-ghost { padding:6px 10px; background:none; border:none; color:var(--text-2); font-size:14px; text-decoration:none; transition:0.2s; cursor:pointer; }
.btn-ghost:hover { color:var(--text); text-decoration:underline; }
.btn-auth { width:100%; padding:12px; border-radius:var(--radius-sm); background:var(--accent); color:var(--bg); font-weight:600; border:none; cursor:pointer; transition:0.2s; }
.btn-auth:hover:not(:disabled) { background:var(--accent-dark); transform:translateY(-1px); }
.btn-auth:disabled { opacity:0.7; cursor:not-allowed; transform:none; }
.btn-register { width:100%; padding:12px; border-radius:var(--radius-sm); background:var(--accent); color:var(--bg); font-weight:600; border:none; cursor:pointer; transition:0.2s; }
.btn-register:hover:not(:disabled) { background:var(--accent-dark); transform:translateY(-1px); }
.btn-register:disabled { opacity:0.7; cursor:not-allowed; transform:none; }

/* Form Styles */
.form-group { margin-bottom:16px; }
.form-label { display:block; margin-bottom:6px; font-size:14px; font-weight:500; color:var(--text); }
.form-input { width:100%; padding:12px 16px; border:1px solid var(--border); border-radius:var(--radius-sm); background:var(--surface); color:var(--text); font-size:16px; transition:0.2s; }
.form-input:focus { outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(0,232,122,0.1); }
.form-input:invalid { border-color:#ef4444; }

/* Auth Layout */
.auth-layout { min-height:100vh; display:flex; background:linear-gradient(135deg, var(--bg) 0%, var(--bg-2) 100%); }
.auth-left { flex:1; padding:60px 40px; display:flex; flex-direction:column; justify-content:center; background:var(--surface); border-radius:0 20px 20px 0; }
.auth-left-logo { font-size:28px; font-weight:800; color:var(--text); margin-bottom:20px; }
.auth-headline { font-size:32px; font-weight:800; line-height:1.2; margin-bottom:12px; }
.auth-headline .gradient-text { background:linear-gradient(45deg, var(--accent), #00ff88); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.auth-desc { font-size:16px; color:var(--text-2); margin-bottom:40px; }
.auth-right { flex:1; padding:60px 40px; display:flex; flex-direction:column; justify-content:center; }
.auth-title { font-size:24px; font-weight:700; margin-bottom:8px; }
.auth-subtitle { font-size:14px; color:var(--text-2); margin-bottom:32px; }
.auth-card { max-width:400px; margin:0 auto; }

/* Dashboard Styles */
.dashboard-layout { display:flex; min-height:100vh; background:var(--bg); }
.sidebar { width:280px; background:var(--surface); border-right:1px solid var(--border); padding:24px; position:sticky; top:0; height:100vh; overflow-y:auto; }
.sidebar-logo { display:block; margin-bottom:40px; text-decoration:none; }
.nav-item { display:block; padding:12px 16px; margin-bottom:4px; border-radius:var(--radius-sm); color:var(--text-2); text-decoration:none; transition:0.2s; }
.nav-item:hover { background:var(--surface-2); color:var(--text); }
.nav-item.active { background:var(--accent-dim); color:var(--accent); font-weight:600; }
.sidebar-bottom { position:absolute; bottom:24px; left:24px; right:24px; }
.user-info { display:flex; align-items:flex-start; gap:12px; }
.avatar { width:32px; height:32px; border-radius:50%; background:var(--accent); display:flex; align-items:center; justify-content:center; font-size:14px; }
.user-name { font-weight:600; color:var(--text); }
.user-plan { font-size:12px; color:var(--text-3); }
.dashboard-content { flex:1; padding:24px; }
.topbar { display:flex; justify-content:space-between; align-items:center; margin-bottom:32px; }
.topbar h1 { margin:0; }
.topbar-actions { display:flex; gap:12px; }
.stats-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(200px, 1fr)); gap:16px; margin-bottom:32px; }
.stat-card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:20px; }
.stat-card--accent { border-color:var(--accent); background:var(--accent-dim); }
.stat-card-label { font-size:14px; color:var(--text-2); margin-bottom:8px; }
.stat-card-value { font-size:24px; font-weight:700; color:var(--text); }
.dash-section { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:24px; margin-bottom:24px; }
.section-title { font-size:18px; font-weight:600; margin-bottom:16px; }

/* Table Styles */
.table { display:grid; grid-template-columns:2fr 2fr 1fr 1fr 1fr; gap:16px; margin-bottom:24px; padding:16px; background:var(--surface-2); border-radius:var(--radius-sm); font-weight:600; color:var(--text-2); }
.table-row { display:contents; }
.table-row > * { padding:12px 16px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-sm); }
.table-short a { color:var(--accent); text-decoration:none; }
.table-short a:hover { text-decoration:underline; }

.btn-outline:hover { background:var(--accent); color:var(--bg); }

/* Ad Banner */
.ad-banner-top { position:fixed; top:0; left:0; right:0; background:linear-gradient(135deg, #ff6b6b, #ee5a24); color:white; padding:12px 24px; display:flex; align-items:center; gap:16px; z-index:95; box-shadow:0 2px 10px rgba(0,0,0,0.1); }
.ad-label { background:rgba(255,255,255,0.2); padding:4px 8px; border-radius:12px; font-size:12px; font-weight:600; }
.ad-content { flex:1; font-size:14px; }
.ad-content span { display:inline-block; margin-right:12px; }
.ad-cta { color:white; text-decoration:none; font-weight:600; padding:6px 12px; background:rgba(255,255,255,0.2); border-radius:6px; transition:0.2s; }
.ad-cta:hover { background:rgba(255,255,255,0.3); }
.ad-close { background:none; border:none; color:white; font-size:18px; cursor:pointer; padding:4px; opacity:0.8; transition:0.2s; }
.ad-close:hover { opacity:1; }

/* Navigation */
.main-nav { display:flex; gap:24px; flex:1; justify-content:center; }
.main-nav a { color:var(--text-2); text-decoration:none; font-weight:500; transition:0.2s; }
.main-nav a:hover { color:var(--text); }
.header-actions { display:flex; gap:12px; align-items:center; }
.hamburger { display:none; flex-direction:column; background:none; border:none; cursor:pointer; padding:8px; }
.hamburger span { width:20px; height:2px; background:var(--text); margin:3px 0; transition:0.3s; }
.hamburger.open span:nth-child(1) { transform:rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity:0; }
.hamburger.open span:nth-child(3) { transform:rotate(-45deg) translate(7px, -6px); }

/* Mobile Navigation */
.mobile-nav { position:fixed; top:var(--header-h); left:0; right:0; background:var(--surface); border-top:1px solid var(--border); padding:20px; transform:translateY(-100%); opacity:0; visibility:hidden; transition:0.3s; z-index:999; }
.ad-banner-visible .mobile-nav { top:calc(var(--header-h) + 45px); }
.mobile-nav.open { transform:translateY(0); opacity:1; visibility:visible; }
.mobile-nav a { display:block; padding:12px 0; color:var(--text); text-decoration:none; border-bottom:1px solid var(--border); }
.mobile-nav a:last-child { border-bottom:none; }

/* Main Content Spacing */
main { padding-top: var(--header-h); }
.ad-banner-visible main { padding-top: calc(var(--header-h) + 45px); } /* Extra space for ad banner */

/* Hero Section */
.hero { padding:80px 0; position:relative; overflow:hidden; }
.hero-bg { position:absolute; top:0; left:0; right:0; bottom:0; overflow:hidden; }
.orb { position:absolute; border-radius:50%; background:linear-gradient(45deg, var(--accent), #00ff88); filter:blur(40px); opacity:0.1; }
.orb-1 { width:300px; height:300px; top:-150px; right:-150px; }
.orb-2 { width:200px; height:200px; top:200px; left:-100px; }
.orb-3 { width:150px; height:150px; bottom:-75px; right:200px; }
.grid-lines { position:absolute; top:0; left:0; right:0; bottom:0; background-image:radial-gradient(circle at 1px 1px, rgba(255,255,255,0.05) 1px, transparent 0); background-size:20px 20px; }
.hero-badge { display:inline-flex; align-items:center; gap:8px; background:var(--surface); border:1px solid var(--border); border-radius:20px; padding:8px 16px; font-size:14px; margin-bottom:24px; }
.badge-dot { width:8px; height:8px; background:var(--accent); border-radius:50%; animation:pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.5; } }
.hero-title { font-size:clamp(2.5rem, 5vw, 4rem); font-weight:800; line-height:1.1; margin-bottom:16px; }
.hero-sub { font-size:18px; color:var(--text-2); max-width:600px; margin-bottom:48px; line-height:1.6; }

/* Shortener Card */
.shortener-card { background:var(--surface); border:1px solid var(--border); border-radius:20px; padding:32px; max-width:600px; margin:0 auto; box-shadow:0 20px 40px rgba(0,0,0,0.1); position:relative; z-index:10; }
.input-group { display:flex; gap:0; margin-bottom:20px; border-radius:12px; overflow:visible; background:var(--surface-2); border:1px solid var(--border); }
.url-input { flex:1; padding:16px 20px; border:none; background:transparent; color:var(--text); font-size:16px; outline:none; pointer-events:auto; position:relative; z-index:1; }
.url-input::placeholder { color:var(--text-3); }
.url-input:focus { background:var(--surface); }
.btn-shorten { padding:16px 24px; background:var(--accent); color:var(--bg); border:none; font-weight:600; cursor:pointer; transition:0.2s; position:relative; overflow:visible; z-index:2; }
.btn-shorten:hover:not(:disabled) { background:var(--accent-dark); transform:translateY(-1px); }
.btn-shorten:disabled { opacity:0.7; cursor:not-allowed; transform:none; }
.btn-shorten.loading { pointer-events:none; }
.btn-shorten .btn-text { display:inline; }
.btn-shorten .btn-icon { display:inline; margin-left:8px; transition:0.2s; }
.btn-shorten.loading .btn-icon { transform:rotate(360deg); }
.btn-loading { position:absolute; top:50%; left:50%; transform:translate(-50%, -50%); width:20px; height:20px; border:2px solid rgba(255,255,255,0.3); border-top:2px solid white; border-radius:50%; animation:spin 1s linear infinite; display:none; }
.btn-shorten.loading .btn-loading { display:block; }
.btn-shorten.loading .btn-text,
.btn-shorten.loading .btn-icon { opacity:0; }
@keyframes spin { 0% { transform:translate(-50%, -50%) rotate(0deg); } 100% { transform:translate(-50%, -50%) rotate(360deg); } }

/* Form Options */
.form-options { display:flex; gap:20px; margin-bottom:20px; flex-wrap:wrap; }
.checkbox-label { display:flex; align-items:center; gap:8px; font-size:14px; color:var(--text-2); cursor:pointer; pointer-events:auto; }
.checkbox-label input[type="checkbox"] { width:16px; height:16px; accent-color:var(--accent); pointer-events:auto; cursor:pointer; }
.extra-options { background:var(--surface-2); border:1px solid var(--border); border-radius:12px; padding:20px; margin-top:16px; }
.option-row { display:flex; gap:16px; flex-wrap:wrap; }
.option-field { flex:1; min-width:200px; }
.option-field label { display:block; font-size:14px; font-weight:500; margin-bottom:6px; }
.option-field input { width:100%; padding:10px 12px; border:1px solid var(--border); border-radius:8px; background:var(--surface); color:var(--text); font-size:14px; }
.option-field input:focus { outline:none; border-color:var(--accent); }

/* Result & Error Boxes */
.result-box { background:linear-gradient(135deg, var(--accent-dim), rgba(0,232,122,0.05)); border:1px solid var(--accent); border-radius:12px; padding:20px; margin-top:20px; }
.result-header { display:flex; align-items:center; gap:8px; margin-bottom:12px; }
.result-url-row { display:flex; align-items:center; gap:12px; margin-bottom:8px; flex-wrap:wrap; }
.result-url { flex:1; padding:12px 16px; background:var(--bg); border:1px solid var(--border); border-radius:8px; color:var(--accent); font-weight:500; text-decoration:none; word-break:break-all; }
.result-url:hover { background:var(--surface); }
.btn-copy { padding:12px 16px; background:var(--surface-2); border:1px solid var(--border); border-radius:8px; color:var(--text); cursor:pointer; font-size:14px; transition:0.2s; }
.btn-copy:hover { background:var(--surface); }
.result-meta { font-size:12px; color:var(--text-3); margin-bottom:16px; }
.result-actions { display:flex; gap:12px; flex-wrap:wrap; }
.error-box { background:rgba(239,68,68,0.1); border:1px solid rgba(239,68,68,0.3); border-radius:12px; padding:16px 20px; margin-top:20px; display:flex; align-items:center; gap:12px; }
.error-box svg { flex-shrink:0; }

/* Captcha Notice */
.captcha-notice { font-size:12px; color:var(--text-3); margin-top:16px; padding-top:16px; border-top:1px solid var(--border); }
.captcha-notice a { color:var(--accent); text-decoration:none; }
.captcha-notice a:hover { text-decoration:underline; }

/* Features Section */
.features { padding:80px 0; }
.features-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(300px, 1fr)); gap:40px; margin-top:48px; }
.feature-card { text-align:center; padding:32px 24px; background:var(--surface); border:1px solid var(--border); border-radius:16px; transition:0.3s; }
.feature-card:hover { transform:translateY(-4px); border-color:var(--accent); }
.feature-icon { font-size:48px; margin-bottom:16px; }
.feature-title { font-size:20px; font-weight:700; margin-bottom:12px; }
.feature-desc { color:var(--text-2); line-height:1.6; }

/* Hero Stats */
.hero-stats { display:flex; justify-content:center; align-items:center; gap:48px; margin-top:48px; flex-wrap:wrap; }
.hero-stats .stat-divider { width:1px; height:60px; background:var(--border); display:none; }
@media (min-width:768px) {
  .hero-stats .stat-divider { display:block; }
}

/* Stats Section */
.stats { padding:80px 0; background:var(--bg-2); }
.stats-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(200px, 1fr)); gap:32px; }
.stat-item { text-align:center; }
.stat-num { font-size:36px; font-weight:800; color:var(--accent); margin-bottom:8px; }
.stat-label { font-size:16px; color:var(--text-2); }

/* CTA Section */
.cta { padding:80px 0; text-align:center; }
.cta-title { font-size:32px; font-weight:800; margin-bottom:16px; }
.cta-desc { font-size:18px; color:var(--text-2); max-width:600px; margin:0 auto 32px; }
.cta-buttons { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; }

/* Footer */
.site-footer { padding:40px 0; border-top:1px solid var(--border); margin-top:80px; }
.footer-content { display:grid; grid-template-columns:repeat(auto-fit, minmax(250px, 1fr)); gap:40px; margin-bottom:32px; }
.footer-section h3 { font-size:18px; font-weight:700; margin-bottom:16px; }
.footer-section a { display:block; color:var(--text-2); text-decoration:none; margin-bottom:8px; transition:0.2s; }
.footer-section a:hover { color:var(--text); }
.footer-bottom { padding-top:24px; border-top:1px solid var(--border); display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px; }
.footer-bottom p { color:var(--text-3); font-size:14px; }

/* Responsive Design */
@media (max-width: 768px) {
  .main-nav { display:none; }
  .hamburger { display:flex; }
  .ad-banner-top { flex-direction:column; text-align:center; gap:8px; }
  .hero { padding:100px 0 60px; }
  .hero-title { font-size:2.5rem; }
  .input-group { flex-direction:column; }
  .btn-shorten { width:100%; justify-content:center; }
  .form-options { flex-direction:column; gap:12px; }
  .option-row { flex-direction:column; }
  .result-url-row { flex-direction:column; align-items:stretch; }
  .result-actions { flex-direction:column; }
  .cta-buttons { flex-direction:column; align-items:center; }
  .footer-bottom { flex-direction:column; text-align:center; }
  .auth-layout { flex-direction:column; }
  .auth-left { border-radius:0 0 20px 20px; padding:40px 24px; }
  .auth-right { padding:40px 24px; }
}

/* Section Headers */
.section-header { text-align:center; margin-bottom:48px; }
.section-tag { display:inline-block; background:var(--accent-dim); color:var(--accent); padding:6px 12px; border-radius:20px; font-size:14px; font-weight:600; margin-bottom:16px; }
.section-header h2 { font-size:36px; font-weight:800; margin-bottom:12px; }
.section-header h2 em { color:var(--accent); font-style:normal; }
.section-header p { font-size:18px; color:var(--text-2); max-width:600px; margin:0 auto; }

/* Feature Cards */
.feature-card--highlight { border-color:var(--accent); background:linear-gradient(135deg, var(--accent-dim), rgba(0,232,122,0.05)); }
.feature-card--highlight:hover { border-color:var(--accent); box-shadow:0 10px 30px rgba(0,232,122,0.2); }

/* How it Works */
.how-it-works { padding:80px 0; background:var(--bg-2); }
.steps { display:grid; grid-template-columns:repeat(auto-fit, minmax(250px, 1fr)); gap:40px; margin-top:48px; }
.step { text-align:center; padding:32px 24px; background:var(--surface); border:1px solid var(--border); border-radius:16px; position:relative; }
.step-num { width:60px; height:60px; background:var(--accent); color:var(--bg); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:24px; font-weight:800; margin:0 auto 20px; position:relative; z-index:1; }
.step-num::before { content:''; position:absolute; top:-2px; left:-2px; right:-2px; bottom:-2px; background:linear-gradient(45deg, var(--accent), #00ff88); border-radius:50%; z-index:-1; }
.step-content p { color:var(--text-2); line-height:1.6; }

/* Step Arrows */
.step-arrow { display:none; font-size:24px; color:var(--accent); align-self:center; }

/* Pricing Grid */
.pricing-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(300px, 1fr)); gap:32px; margin-top:48px; max-width:1000px; margin-left:auto; margin-right:auto; }
.pricing-card { background:var(--surface); border:1px solid var(--border); border-radius:20px; padding:40px 32px; text-align:center; position:relative; transition:0.3s; }
.pricing-card:hover { transform:translateY(-4px); border-color:var(--accent); }
.pricing-card--pro { border-color:var(--accent); background:linear-gradient(135deg, var(--accent-dim), rgba(0,232,122,0.05)); }
.pricing-card--pro::before { content:'Phổ biến'; position:absolute; top:-12px; left:50%; transform:translateX(-50%); background:var(--accent); color:var(--bg); padding:6px 16px; border-radius:20px; font-size:12px; font-weight:600; }
.pricing-badge { background:var(--surface-2); color:var(--text-2); padding:4px 12px; border-radius:12px; font-size:12px; font-weight:600; display:inline-block; margin-bottom:16px; }
.pricing-badge--pro { background:var(--accent); color:var(--bg); }
.pricing-price { font-size:36px; font-weight:800; color:var(--accent); margin-bottom:24px; }
.pricing-features { list-style:none; padding:0; margin:0 0 32px; text-align:left; }
.pricing-features li { padding:8px 0; border-bottom:1px solid var(--border); color:var(--text-2); }
.pricing-features li:last-child { border-bottom:none; }
.btn-outline-full:hover { background:var(--accent); color:var(--bg); }

/* FAQ List */
.faq-list { max-width:800px; margin:0 auto; }

/* CTA Section */
.cta-section { padding:80px 0; background:linear-gradient(135deg, var(--bg-2), var(--bg-3)); }
.cta-box { text-align:center; max-width:600px; margin:0 auto; }
.cta-box h2 { font-size:36px; font-weight:800; margin-bottom:16px; }
.cta-box p { font-size:18px; color:var(--text-2); margin-bottom:32px; }
.cta-actions { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; }
.btn-primary-full { display:block; width:100%; padding:12px; background:var(--accent); color:var(--bg); text-decoration:none; border-radius:8px; font-weight:600; text-align:center; transition:0.2s; }
.btn-primary-full:hover { background:var(--accent-dark); }
.btn-large { padding:16px 32px; font-size:16px; }

/* Additional Button Styles */
.btn-ghost:hover { background:var(--surface-2); color:var(--text); }

/* Pricing */
.pricing { padding:80px 0; }
.pricing-cards { display:grid; grid-template-columns:repeat(auto-fit, minmax(300px, 1fr)); gap:32px; margin-top:48px; max-width:1000px; margin-left:auto; margin-right:auto; }
.pricing-card { background:var(--surface); border:1px solid var(--border); border-radius:20px; padding:40px 32px; text-align:center; position:relative; transition:0.3s; }
.pricing-card:hover { transform:translateY(-4px); border-color:var(--accent); }
.pricing-card.popular { border-color:var(--accent); background:linear-gradient(135deg, var(--accent-dim), rgba(0,232,122,0.05)); }
.pricing-card.popular::before { content:'Phổ biến'; position:absolute; top:-12px; left:50%; transform:translateX(-50%); background:var(--accent); color:var(--bg); padding:6px 16px; border-radius:20px; font-size:12px; font-weight:600; }
.pricing-header { margin-bottom:24px; }
.pricing-title { font-size:24px; font-weight:700; margin-bottom:8px; }
.pricing-desc { color:var(--text-2); }
.pricing-price { margin-bottom:32px; }
.pricing-amount { font-size:48px; font-weight:800; color:var(--accent); }
.pricing-period { color:var(--text-2); }
.pricing-features { list-style:none; padding:0; margin-bottom:32px; text-align:left; }
.pricing-features li { padding:8px 0; border-bottom:1px solid var(--border); color:var(--text-2); }
.pricing-features li:last-child { border-bottom:none; }
.pricing-cta { width:100%; }

/* FAQ */
.faq { padding:80px 0; background:var(--bg-2); }
.faq-item { background:var(--surface); border:1px solid var(--border); border-radius:12px; margin-bottom:16px; overflow:hidden; }
.faq-question { width:100%; padding:20px 24px; background:none; border:none; text-align:left; font-size:16px; font-weight:600; color:var(--text); cursor:pointer; display:flex; justify-content:space-between; align-items:center; transition:0.2s; }
.faq-question:hover { background:var(--surface-2); }
.faq-question::after { content:'+'; font-size:20px; color:var(--accent); transition:0.2s; }
.faq-item.active .faq-question::after { content:'−'; }
.faq-answer { padding:0 24px 20px; color:var(--text-2); line-height:1.6; max-height:0; overflow:hidden; transition:0.3s; }
.faq-item.active .faq-answer { max-height:500px; padding-top:12px; }

/* Popup Ad */
.popup-ad { position:fixed; top:0; left:0; right:0; bottom:0; background:rgba(0,0,0,0.8); display:flex; align-items:center; justify-content:center; z-index:1000; backdrop-filter:blur(5px); }
.popup-content { background:var(--surface); border:1px solid var(--border); border-radius:20px; padding:40px; max-width:500px; width:90%; position:relative; text-align:center; }
.popup-close { position:absolute; top:20px; right:20px; background:none; border:none; font-size:24px; color:var(--text-2); cursor:pointer; padding:8px; }
.popup-close:hover { color:var(--text); }
.popup-content h3 { font-size:24px; font-weight:700; margin-bottom:16px; }
.popup-content p { color:var(--text-2); margin-bottom:24px; line-height:1.6; }
.popup-content .btn-primary { margin-top:16px; }

/* Footer */
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr; gap:40px; margin-bottom:32px; }
.footer-brand { }
.footer-brand p { color:var(--text-2); margin:16px 0 20px; line-height:1.6; }
.footer-social { display:flex; gap:12px; }
.footer-social a { width:32px; height:32px; background:var(--surface-2); border:1px solid var(--border); border-radius:50%; display:flex; align-items:center; justify-content:center; color:var(--text-2); text-decoration:none; transition:0.2s; }
.footer-social a:hover { background:var(--accent); color:var(--bg); border-color:var(--accent); }
.footer-col h4 { font-size:16px; font-weight:700; margin-bottom:16px; }
.footer-col ul { list-style:none; padding:0; margin:0; }
.footer-col li { margin-bottom:8px; }
.footer-col a { color:var(--text-2); text-decoration:none; transition:0.2s; }
.footer-col a:hover { color:var(--text); }

/* Popup Overlay */
.popup-overlay { position:fixed; top:0; left:0; right:0; bottom:0; background:rgba(0,0,0,0.8); display:flex; align-items:center; justify-content:center; z-index:1000; backdrop-filter:blur(5px); }
.popup-box { background:var(--surface); border:1px solid var(--border); border-radius:20px; padding:40px; max-width:400px; width:90%; position:relative; text-align:center; box-shadow:0 20px 40px rgba(0,0,0,0.3); }
.popup-box { background:var(--surface); border:1px solid var(--border); border-radius:20px; padding:40px; max-width:400px; width:90%; position:relative; text-align:center; box-shadow:0 20px 40px rgba(0,0,0,0.3); }
.popup-ad-label { position:absolute; top:20px; left:20px; background:var(--accent-dim); color:var(--accent); padding:4px 8px; border-radius:12px; font-size:12px; font-weight:600; }
.popup-icon { font-size:48px; margin-bottom:16px; }
.popup-content h3 { font-size:24px; font-weight:700; margin-bottom:12px; }
.popup-content p { color:var(--text-2); margin-bottom:24px; line-height:1.6; }
.popup-cta { display:block; width:100%; margin-bottom:12px; }
.popup-skip { background:none; border:none; color:var(--text-2); cursor:pointer; font-size:14px; padding:8px; transition:0.2s; }
.popup-skip:hover { color:var(--text); }

/* Ad Banner Bottom */
.ad-banner-bottom { position:fixed; bottom:0; left:0; right:0; background:linear-gradient(135deg, #667eea, #764ba2); color:white; padding:12px 24px; display:flex; align-items:center; gap:16px; z-index:90; box-shadow:0 0 20px rgba(0,0,0,0.2); }
.ad-banner-bottom .ad-content strong { color:#ffd700; }

/* Body padding for fixed elements */
body { padding-bottom: 0; }
.ad-banner-bottom-visible body { padding-bottom: 60px; } /* Space for bottom ad banner */

/* Additional Responsive */
@media (max-width: 768px) {
  .footer-grid { grid-template-columns:1fr; gap:32px; text-align:center; }
  .popup-box { padding:32px 24px; }
  .ad-banner-bottom { flex-direction:column; text-align:center; gap:8px; }
}