/* ═══════════════════════════════════════════════════════
   VidGen Pro — Professional Dark Theme + Video Background
   ═══════════════════════════════════════════════════════ */

:root {
    --bg:          #0a0a0a;
    --surface:     #141414;
    --surface-2:   #1a1a1a;
    --surface-3:   #222222;
    --border:      #2a2a2a;
    --border-2:    #333333;
    --text:        #f5f5f5;
    --text-2:      #a3a3a3;
    --text-3:      #666666;
    --white:       #ffffff;
    --accent:      #ffffff;
    --accent-dim:  rgba(255,255,255,0.08);
    --green:       #22c55e;
    --red:         #ef4444;
    --radius:      12px;
    --radius-lg:   16px;
    --radius-xl:   20px;
    --shadow:      0 2px 8px rgba(0,0,0,0.3);
    --shadow-lg:   0 12px 40px rgba(0,0,0,0.5);
    --glass:       rgba(10,10,10,0.75);
    --glass-2:     rgba(20,20,20,0.85);
    --transition:  0.25s cubic-bezier(0.4,0,0.2,1);
    --font:        'Inter','Noto Sans Thai',-apple-system,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden}
.container{max-width:1100px;margin:0 auto;padding:0 24px}

/* ── VIDEO BACKGROUND ─────────────────────────────────── */
.video-bg{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;overflow:hidden}
.video-bg video{width:100%;height:100%;object-fit:cover}
.video-overlay{
    position:absolute;inset:0;
    background:linear-gradient(180deg,
        rgba(0,0,0,0.6) 0%,
        rgba(0,0,0,0.4) 30%,
        rgba(0,0,0,0.7) 70%,
        rgba(0,0,0,0.95) 100%
    );
}

/* ── HEADER ─────────────────────────────────────────────── */
header{
    position:fixed;top:0;left:0;right:0;z-index:100;
    background:rgba(0,0,0,0.4);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid rgba(255,255,255,0.06);
}
nav{
    max-width:1100px;margin:0 auto;padding:14px 24px;
    display:flex;justify-content:space-between;align-items:center;
}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--white)}
.logo-icon{display:flex}
.nav-actions{display:flex;align-items:center;gap:20px}
.nav-link{color:var(--text-2);text-decoration:none;font-size:14px;font-weight:500;transition:var(--transition)}
.nav-link:hover{color:var(--white)}
.lang-toggle{
    display:flex;align-items:center;gap:6px;
    padding:6px 14px;border:1px solid var(--border-2);border-radius:20px;
    background:transparent;color:var(--text-2);font-size:13px;font-weight:500;
    cursor:pointer;transition:var(--transition);font-family:var(--font);
}
.lang-toggle:hover{border-color:var(--text-2);color:var(--white)}

/* ── HERO ───────────────────────────────────────────────── */
.hero{
    position:relative;z-index:1;
    min-height:100vh;display:flex;flex-direction:column;
    justify-content:center;align-items:center;text-align:center;
    padding:100px 24px 60px;
}
.hero-content{max-width:720px}
.hero-badge{
    display:inline-block;
    padding:6px 16px;border-radius:20px;
    background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);
    font-size:11px;font-weight:600;letter-spacing:1.5px;color:var(--text-2);
    margin-bottom:24px;
}
.hero h1{font-size:clamp(32px,6vw,56px);font-weight:800;line-height:1.15;letter-spacing:-1.5px;margin-bottom:20px;color:var(--white)}
.hero-gradient{
    background:linear-gradient(135deg,#fff 0%,#999 100%);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;
    background-clip:text;
}
.hero-desc{font-size:17px;color:var(--text-2);max-width:520px;margin:0 auto 32px;line-height:1.7}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.btn-primary{
    display:inline-flex;align-items:center;gap:8px;
    padding:14px 28px;border-radius:10px;
    background:var(--white);color:#000;
    font-size:15px;font-weight:600;text-decoration:none;
    transition:var(--transition);font-family:var(--font);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,255,255,0.15)}
.btn-glow{box-shadow:0 0 30px rgba(255,255,255,0.1)}
.btn-ghost{
    display:inline-flex;align-items:center;
    padding:14px 28px;border-radius:10px;
    border:1px solid var(--border-2);color:var(--text-2);
    font-size:15px;font-weight:500;text-decoration:none;
    transition:var(--transition);
}
.btn-ghost:hover{border-color:var(--text-2);color:var(--white)}

/* Stats */
.hero-stats{display:flex;align-items:center;justify-content:center;gap:32px}
.stat{text-align:center}
.stat-num{display:block;font-size:24px;font-weight:700;color:var(--white)}
.stat-label{font-size:12px;color:var(--text-3);text-transform:uppercase;letter-spacing:0.5px}
.stat-divider{width:1px;height:32px;background:var(--border-2)}

/* Scroll indicator */
.scroll-indicator{position:absolute;bottom:32px;left:50%;transform:translateX(-50%)}
.scroll-dot{
    width:6px;height:6px;border-radius:50%;background:var(--text-3);
    animation:scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce{0%,100%{transform:translateY(0);opacity:1}50%{transform:translateY(12px);opacity:0.3}}

/* ── GENERATOR SECTION ──────────────────────────────────── */
.generator-section{position:relative;z-index:2;background:var(--bg);padding:80px 0}
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{font-size:clamp(24px,4vw,36px);font-weight:700;letter-spacing:-0.5px;margin-bottom:8px}
.section-header p{color:var(--text-2);font-size:15px}

.generator-grid{display:grid;grid-template-columns:1.2fr 0.8fr;gap:24px;align-items:start}

/* Panels */
.panel{
    background:var(--surface);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:28px;
}

/* Mode Toggle */
.mode-toggle{display:flex;gap:6px;padding:4px;background:var(--surface-2);border-radius:10px;margin-bottom:24px}
.mode-btn{
    flex:1;display:flex;align-items:center;justify-content:center;gap:8px;
    padding:12px;border:none;border-radius:8px;background:transparent;
    color:var(--text-3);font-size:14px;font-weight:500;cursor:pointer;
    transition:var(--transition);font-family:var(--font);
}
.mode-btn:hover{color:var(--text-2)}
.mode-btn.active{background:var(--white);color:#000;font-weight:600}
.mode-btn svg{width:18px;height:18px}

/* Fields */
.field{margin-bottom:22px}
.field label{display:block;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:0.8px;color:var(--text-3);margin-bottom:8px}
.field-header{display:flex;justify-content:space-between;align-items:center}
.field-value{font-size:14px;font-weight:700;color:var(--white);background:var(--surface-3);padding:2px 12px;border-radius:6px}

textarea{
    width:100%;padding:14px 16px;border:1px solid var(--border);border-radius:10px;
    font-size:14px;font-family:var(--font);background:var(--surface-2);color:var(--text);
    resize:vertical;transition:var(--transition);
}
textarea:focus{outline:none;border-color:var(--text-3);box-shadow:0 0 0 3px rgba(255,255,255,0.03)}
textarea::placeholder{color:var(--text-3)}

/* Dropzone */
.dropzone{
    border:2px dashed var(--border-2);border-radius:12px;padding:36px 20px;
    text-align:center;cursor:pointer;transition:var(--transition);
    color:var(--text-3);
}
.dropzone:hover{border-color:var(--text-3);background:var(--surface-2)}
.dropzone svg{margin-bottom:8px;opacity:0.4}
.dropzone img{max-width:100%;max-height:180px;border-radius:8px}

/* Model Cards */
.model-cards{display:flex;flex-direction:column;gap:8px}
.model-card{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 16px;border:1.5px solid var(--border);border-radius:10px;
    cursor:pointer;transition:var(--transition);
}
.model-card:hover{border-color:var(--text-3);background:var(--surface-2)}
.model-card.selected{border-color:var(--white);background:var(--surface-3)}
.model-left{display:flex;align-items:center;gap:12px}
.model-tier{font-size:13px;font-weight:600;min-width:90px}
.model-name{font-size:13px;color:var(--text-2)}
.model-price{font-size:14px;font-weight:700;color:var(--white)}

/* Range Slider */
input[type="range"]{
    width:100%;height:4px;-webkit-appearance:none;appearance:none;
    background:var(--border);border-radius:2px;outline:none;margin:12px 0 4px;
}
input[type="range"]::-webkit-slider-thumb{
    -webkit-appearance:none;width:20px;height:20px;border-radius:50%;
    background:var(--white);cursor:pointer;border:none;
    box-shadow:0 2px 8px rgba(0,0,0,0.4);
}
.range-ticks{display:flex;justify-content:space-between;font-size:11px;color:var(--text-3)}

/* ── PRICE CARD ─────────────────────────────────────────── */
.price-card{text-align:center;padding:28px 20px;margin-bottom:20px}
.price-tier{font-size:14px;font-weight:600;color:var(--text-2);margin-bottom:8px}
.price-main{display:flex;align-items:baseline;justify-content:center;gap:2px;margin-bottom:4px}
.price-currency{font-size:24px;font-weight:600;color:var(--text-2)}
.price-amount{font-size:64px;font-weight:800;letter-spacing:-3px;color:var(--white);line-height:1}
.price-sub{font-size:13px;color:var(--text-3);margin-bottom:12px}
.price-or{font-size:13px;color:var(--text-3);margin-bottom:20px}
.credit-badge{
    display:inline-block;padding:3px 12px;border-radius:12px;
    background:rgba(34,197,94,0.12);color:var(--green);
    font-weight:600;font-size:12px;margin-left:4px;
}
.price-details{
    border-top:1px solid var(--border);padding-top:16px;text-align:left;
}
.detail-row{
    display:flex;justify-content:space-between;padding:6px 0;
    font-size:13px;color:var(--text-2);
}
.detail-row span:last-child{color:var(--text);font-weight:500}

/* ── BUTTONS ────────────────────────────────────────────── */
.btn-generate{
    width:100%;padding:18px;border:none;border-radius:12px;
    background:var(--white);color:#000;
    font-size:16px;font-weight:700;cursor:pointer;
    transition:var(--transition);font-family:var(--font);
    position:relative;overflow:hidden;
}
.btn-generate:hover{transform:translateY(-1px);box-shadow:0 8px 25px rgba(255,255,255,0.12)}
.btn-generate:active{transform:translateY(0)}
.btn-generate:disabled{opacity:0.4;cursor:not-allowed;transform:none}

.dot-loader{display:flex;gap:6px;justify-content:center;align-items:center}
.dot-loader span{width:8px;height:8px;border-radius:50%;background:#000;animation:dotPulse 1.4s ease-in-out infinite}
.dot-loader span:nth-child(2){animation-delay:0.2s}
.dot-loader span:nth-child(3){animation-delay:0.4s}
@keyframes dotPulse{0%,80%,100%{transform:scale(0.6);opacity:0.4}40%{transform:scale(1);opacity:1}}

/* Guarantee */
.guarantee{
    display:flex;align-items:center;justify-content:center;gap:8px;
    margin-top:16px;font-size:12px;color:var(--text-3);
}
.guarantee svg{color:var(--green);flex-shrink:0}

/* ── PRICING SECTION ────────────────────────────────────── */
.pricing-section{position:relative;z-index:2;background:var(--surface);padding:80px 0;border-top:1px solid var(--border)}

.packs-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.pack-card{
    background:var(--surface-2);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:28px 20px;text-align:center;
    position:relative;transition:var(--transition);
}
.pack-card:hover{border-color:var(--text-3);transform:translateY(-2px)}
.pack-popular,.pack-best{border-color:var(--white)}
.pack-badge{
    position:absolute;top:-10px;left:50%;transform:translateX(-50%);
    padding:4px 14px;border-radius:12px;
    background:var(--white);color:#000;
    font-size:10px;font-weight:700;letter-spacing:0.5px;white-space:nowrap;
}
.pack-badge-dark{background:var(--surface-3);color:var(--white)}
.pack-name{font-size:16px;font-weight:600;margin-bottom:8px;margin-top:8px}
.pack-credits{font-size:36px;font-weight:800;letter-spacing:-1px;margin-bottom:4px}
.pack-credits small{font-size:14px;font-weight:400;color:var(--text-2)}
.pack-price{font-size:22px;font-weight:700;margin-bottom:4px}
.pack-per{font-size:13px;color:var(--text-3);margin-bottom:20px}
.save{color:var(--green);font-weight:600}

.btn-pack{
    width:100%;padding:12px;border:1px solid var(--border-2);border-radius:10px;
    background:transparent;color:var(--text);font-size:14px;font-weight:600;
    cursor:pointer;transition:var(--transition);font-family:var(--font);
}
.btn-pack:hover{border-color:var(--white);background:var(--surface-3)}
.btn-pack-primary{background:var(--white);color:#000;border-color:var(--white)}
.btn-pack-primary:hover{opacity:0.9}

.pricing-note{text-align:center;font-size:13px;color:var(--text-3)}

/* ── MODALS ─────────────────────────────────────────────── */
.modal-overlay{
    display:none;position:fixed;inset:0;z-index:300;
    background:rgba(0,0,0,0.7);backdrop-filter:blur(8px);
    align-items:center;justify-content:center;
}
.modal-overlay.show{display:flex}
.modal-card{
    background:var(--surface);border:1px solid var(--border);
    border-radius:var(--radius-xl);padding:40px;max-width:420px;width:90%;
    text-align:center;position:relative;
    animation:modalUp 0.35s cubic-bezier(0.16,1,0.3,1);
}
@keyframes modalUp{from{opacity:0;transform:translateY(20px) scale(0.97)}to{opacity:1;transform:none}}

.modal-x{
    position:absolute;top:16px;right:16px;width:36px;height:36px;
    border:none;background:var(--surface-2);border-radius:50%;
    color:var(--text-3);cursor:pointer;display:flex;align-items:center;justify-content:center;
    transition:var(--transition);
}
.modal-x:hover{background:var(--surface-3);color:var(--text)}
.modal-icon{margin-bottom:16px;color:var(--text-3)}
.modal-price{font-size:40px;font-weight:800;letter-spacing:-1px;margin-bottom:20px}
.qr-box{
    display:inline-block;padding:16px;background:#fff;border-radius:14px;margin-bottom:16px;
}
.qr-box img{width:200px;height:200px}
.modal-method{font-size:13px;color:var(--text-3);margin-bottom:20px;display:flex;align-items:center;justify-content:center;gap:6px}
.modal-status{display:flex;align-items:center;justify-content:center;gap:12px;color:var(--text-2);font-size:14px}

/* Pulse ring */
.pulse-ring{width:12px;height:12px;border-radius:50%;background:var(--green);position:relative}
.pulse-ring::after{
    content:'';position:absolute;inset:-4px;border-radius:50%;
    border:2px solid var(--green);animation:pulse 1.5s ease-out infinite;
}
@keyframes pulse{0%{transform:scale(1);opacity:0.8}100%{transform:scale(2);opacity:0}}

/* Progress Modal */
.gen-animation{margin-bottom:24px}
.gen-ring{width:100px;height:100px;position:relative;margin:0 auto}
.gen-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.gen-ring circle{transition:stroke-dashoffset 0.5s ease}
.gen-percent{
    position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
    font-size:20px;font-weight:700;color:var(--white);
}
.gen-sub{color:var(--text-3);font-size:14px;margin-bottom:28px}
.gen-steps{display:flex;flex-direction:column;gap:12px;text-align:left;padding:0 20px}
.gen-step{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--text-3)}
.gen-step.done{color:var(--green)}
.gen-step.done .step-check{background:var(--green);color:#fff;font-size:12px}
.gen-step.active{color:var(--white)}
.step-check{
    width:28px;height:28px;border-radius:50%;
    background:var(--surface-3);color:var(--text-3);
    display:flex;align-items:center;justify-content:center;
    font-size:13px;font-weight:600;flex-shrink:0;
}
.mini-spinner{width:14px;height:14px;border:2px solid var(--border);border-top-color:var(--white);border-radius:50%;animation:spin 0.7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.gen-error{
    margin-top:20px;padding:16px;background:rgba(239,68,68,0.08);
    border:1px solid rgba(239,68,68,0.2);border-radius:10px;
    text-align:left;display:flex;flex-direction:column;gap:8px;
}
.gen-error p{font-size:13px;color:var(--red)}
.refund-msg{color:var(--text-2)!important;font-weight:600}

/* Download Modal */
.modal-download video{width:100%;max-height:300px;border-radius:12px;background:#000;margin:16px 0}
.success-burst{margin-bottom:16px;animation:burstIn 0.5s cubic-bezier(0.16,1,0.3,1)}
@keyframes burstIn{from{transform:scale(0.5);opacity:0}to{transform:scale(1);opacity:1}}

.btn-download{
    display:flex;align-items:center;justify-content:center;gap:8px;
    width:100%;padding:16px;border-radius:12px;
    background:var(--white);color:#000;
    font-size:15px;font-weight:700;text-decoration:none;
    transition:var(--transition);margin-bottom:12px;
}
.btn-download:hover{opacity:0.9;transform:translateY(-1px)}
.btn-ghost-dark{
    width:100%;padding:14px;border:1px solid var(--border);border-radius:10px;
    background:transparent;color:var(--text-2);font-size:14px;font-weight:500;
    cursor:pointer;transition:var(--transition);font-family:var(--font);
}
.btn-ghost-dark:hover{border-color:var(--text-3);color:var(--white)}

/* ── FOOTER ─────────────────────────────────────────────── */
footer{
    position:relative;z-index:2;background:var(--bg);
    border-top:1px solid var(--border);padding:32px 0;
}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-logo{font-size:16px;font-weight:700}
.footer-brand span:last-child{font-size:12px;color:var(--text-3)}
.footer-links{font-size:12px;color:var(--text-3)}
.footer-links a{color:var(--text-2);text-decoration:none}
.footer-links a:hover{color:var(--white)}

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media(max-width:900px){
    .generator-grid{grid-template-columns:1fr}
    .packs-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
    .hero h1{font-size:28px}
    .hero-stats{gap:20px}
    .stat-num{font-size:20px}
    .packs-grid{grid-template-columns:1fr}
    .panel{padding:20px}
    .modal-card{padding:28px 20px}
    .qr-box img{width:160px;height:160px}
    .footer-inner{flex-direction:column;text-align:center}
}

input[type="email"] {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    font-family: var(--font);
    background: var(--surface-2);
    color: var(--text);
    transition: var(--transition);
}
input[type="email"]:focus {
    outline: none;
    border-color: var(--text-3);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.03);
}
input[type="email"]::placeholder { color: var(--text-3); }
.field-note {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.5;
}

/* ═══ VIVA VIBE AI PROMO ═══ */
.promo-section {
    position: relative;
    z-index: 2;
    background: linear-gradient(180deg, var(--bg) 0%, #0d0d1a 100%);
    padding: 80px 0;
    border-top: 1px solid var(--border);
}
.promo-card {
    display: grid;
    grid-template-columns: 1.5fr 0.5fr;
    gap: 40px;
    align-items: center;
    background: linear-gradient(135deg, rgba(59,130,246,0.06) 0%, rgba(139,92,246,0.06) 100%);
    border: 1px solid rgba(59,130,246,0.15);
    border-radius: var(--radius-xl);
    padding: 48px;
}
.promo-badge {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    background: rgba(59,130,246,0.12);
    border: 1px solid rgba(59,130,246,0.25);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: #60a5fa;
    margin-bottom: 16px;
}
.promo-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}
.promo-desc {
    font-size: 15px;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 20px;
}
.promo-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
}
.promo-feat {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-2);
}
.promo-feat svg { flex-shrink: 0; }
.btn-promo {
    display: inline-flex !important;
    width: auto !important;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6) !important;
    color: #fff !important;
}
.btn-promo:hover {
    box-shadow: 0 12px 35px rgba(59,130,246,0.3) !important;
}
.promo-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}
.promo-icon {
    padding: 20px;
    background: rgba(255,255,255,0.04);
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.06);
}
.promo-stats {
    display: flex;
    gap: 20px;
}
.promo-stat { text-align: center; }
.ps-num {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
}
.ps-lbl {
    font-size: 11px;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
@media(max-width:768px) {
    .promo-card {
        grid-template-columns: 1fr;
        padding: 32px 24px;
    }
    .promo-visual { display: none; }
}