/* === Video Downloader Pro v2.0 — KTHDIGI Golden Template === */
@font-face{font-family:'Phudu';src:url('https://kth-electric.com/wp-content/fonts/DT-Phudu/DTPhudu-Bold.woff') format('woff');font-weight:700;font-display:swap}
@font-face{font-family:'Ganh';src:url('https://kth-electric.com/wp-content/fonts/Ganh/Ganh%20Type-Regular.otf') format('opentype');font-weight:400;font-display:swap}
:root{--bg:#060a12;--card:rgba(14,22,38,0.75);--card2:rgba(22,34,56,0.6);--border:rgba(255,255,255,0.08);--text:#e2e8f0;--muted:#8896ab;--p:#1877f2;--p2:#00c6ff;--accent:#e4405f;--success:#22c55e;--warn:#f59e0b;--radius:16px;--glow:0 0 20px rgba(24,119,242,0.15)}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Ganh',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;min-height:100vh;display:flex;flex-direction:column}
h1,h2,h3,h4,.logo,.brand-font{font-family:'Phudu',sans-serif}
a{text-decoration:none;color:inherit}
.ic{display:inline-block;width:1em;height:1em;vertical-align:-.125em;fill:currentColor}
.container{max-width:1100px;margin:0 auto;padding:0 20px}

/* ANIMATED BACKGROUND */
body::before{content:'';position:fixed;top:0;left:0;width:100vw;height:100vh;z-index:-1;background:var(--bg);pointer-events:none}
body::after{content:'';position:fixed;top:-20%;left:-10%;width:60vw;height:60vw;max-width:600px;max-height:600px;border-radius:50%;background:radial-gradient(circle,rgba(24,119,242,0.08),transparent 70%);filter:blur(80px);animation:bgFloat 20s ease-in-out infinite alternate;pointer-events:none;z-index:-1}
@keyframes bgFloat{0%{transform:translate(0,0) scale(1)}100%{transform:translate(80px,60px) scale(1.15)}}

/* HEADER */
.kth-header{background:rgba(6,10,18,0.88);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--border);padding:14px 0;position:sticky;top:0;z-index:100;transition:background 0.3s}
.nav-flex{display:flex;justify-content:space-between;align-items:center}
.logo{font-size:1.5rem;color:var(--p2);display:flex;align-items:center;gap:8px;font-weight:700;transition:color 0.3s}
.logo span{color:#fff}
.logo:hover{color:#fff}
.header-links{display:flex;gap:4px;align-items:center}
.header-links a{padding:7px 14px;border-radius:10px;font-weight:600;color:var(--muted);font-size:.85rem;transition:.25s;display:flex;align-items:center;gap:6px}
.header-links a:hover{color:var(--p2);background:rgba(0,198,255,0.06)}
.theme-btn{background:transparent;border:none;color:var(--muted);cursor:pointer;padding:8px;border-radius:10px;display:flex;align-items:center;justify-content:center;transition:all 0.3s;margin-left:10px}
.theme-btn:hover{color:var(--p2);background:rgba(0,198,255,0.1)}

/* HERO */
.hero{padding:70px 0 100px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-30%;left:50%;transform:translateX(-50%);width:800px;height:800px;background:radial-gradient(circle,rgba(24,119,242,0.07) 0%,rgba(228,64,95,0.04) 35%,transparent 60%);border-radius:50%;pointer-events:none;animation:heroPulse 10s ease-in-out infinite}
@keyframes heroPulse{0%,100%{transform:translateX(-50%) scale(1);opacity:.5}50%{transform:translateX(-50%) scale(1.12);opacity:1}}
.hero h1{font-size:clamp(2rem,5.5vw,3.4rem);position:relative;z-index:1;margin-bottom:16px;background:linear-gradient(135deg,var(--p2) 0%,#fff 40%,var(--p) 70%,var(--accent) 100%);background-size:300% auto;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:shimmer 5s linear infinite}
@keyframes shimmer{to{background-position:300% center}}
.hero p{color:var(--muted);font-size:1.08rem;max-width:560px;margin:0 auto;position:relative;z-index:1;line-height:1.7}
.platforms{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:24px;position:relative;z-index:1}
.plat{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:8px 16px;font-size:.82rem;color:var(--muted);display:flex;align-items:center;gap:6px;cursor:pointer;transition:all 0.3s;backdrop-filter:blur(8px)}
.plat:hover{border-color:var(--p);color:var(--p2);transform:translateY(-2px);box-shadow:var(--glow)}
.plat svg{transition:transform 0.3s}
.plat:hover svg{transform:scale(1.15)}

/* DETECTED PLATFORM BADGE */
.detected-platform{display:none;align-items:center;gap:8px;padding:8px 14px;background:rgba(24,119,242,0.06);border:1px solid rgba(24,119,242,0.2);border-radius:10px;margin-bottom:12px;font-size:.88rem;color:var(--muted);animation:fadeIn 0.3s ease}
.detected-platform.active{display:flex}
.plat-icon{display:flex;align-items:center}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* INPUT CARD */
.input-card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:28px;max-width:700px;margin:-50px auto 0;position:relative;z-index:10;box-shadow:0 24px 64px rgba(0,0,0,.45);backdrop-filter:blur(20px)}
.input-row{display:flex;gap:8px;margin-bottom:14px;position:relative}
.url-input{flex:1;padding:16px 90px 16px 18px;background:rgba(0,0,0,0.3);border:2px solid var(--border);border-radius:12px;color:var(--text);font-size:1rem;font-family:inherit;outline:none;transition:all 0.3s}
.url-input::placeholder{color:rgba(255,255,255,0.2)}
.url-input:focus{border-color:var(--p);box-shadow:0 0 0 3px rgba(24,119,242,0.12);background:rgba(0,0,0,0.4)}
.input-actions{position:absolute;right:10px;top:50%;transform:translateY(-50%);display:flex;gap:4px}
.act-btn{background:rgba(255,255,255,0.05);border:1px solid var(--border);color:var(--muted);width:36px;height:36px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all 0.25s;padding:0}
.act-btn:hover{border-color:var(--p);color:var(--p2);background:rgba(24,119,242,0.08)}
#clearBtn{display:none}
.btn-download{width:100%;padding:17px;background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;border:none;border-radius:12px;font-size:1.1rem;font-weight:700;font-family:'Phudu',sans-serif;cursor:pointer;transition:all 0.3s;display:flex;align-items:center;justify-content:center;gap:10px;letter-spacing:.5px;box-shadow:0 4px 20px rgba(24,119,242,0.25)}
.btn-download:hover{transform:translateY(-2px);box-shadow:0 8px 35px rgba(24,119,242,0.35);filter:brightness(1.05)}
.btn-download:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.spinner-sm{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite;display:inline-block}

/* LOADER */
.loader{display:none;text-align:center;padding:30px 0}
.loader.active{display:block}
.spinner{width:38px;height:38px;border:3px solid var(--border);border-top-color:var(--p);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}
.loader p{color:var(--muted);font-size:.88rem}

/* RESULT */
.result{display:none;margin-top:20px;animation:fadeUp .4s cubic-bezier(0.16,1,0.3,1)}
.result.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.preview-card{background:var(--card2);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:grid;grid-template-columns:180px 1fr;backdrop-filter:blur(10px)}
.preview-thumb{width:180px;height:240px;object-fit:cover;background:rgba(0,0,0,0.3)}
.preview-info{padding:20px;display:flex;flex-direction:column;justify-content:space-between;gap:8px}
.preview-info .title{font-size:.95rem;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.preview-info .author{color:var(--p2);font-size:.85rem;font-weight:600;display:flex;align-items:center}
.preview-info .stats{color:var(--muted);font-size:.78rem}
.dl-buttons{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}
.dl-btn{padding:10px 18px;border-radius:10px;font-weight:600;font-size:.84rem;display:inline-flex;align-items:center;gap:6px;cursor:pointer;transition:all 0.25s;border:none;font-family:inherit;text-decoration:none;white-space:nowrap}
.dl-btn.hd{background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;box-shadow:0 2px 10px rgba(24,119,242,0.2)}
.dl-btn.hd:hover{transform:translateY(-1px);box-shadow:0 4px 15px rgba(24,119,242,0.3);filter:brightness(1.08)}
.dl-btn.sd{background:var(--accent);color:#fff}
.dl-btn.sd:hover{background:#d63852;transform:translateY(-1px)}
.dl-btn.audio{background:#9333ea;color:#fff}
.dl-btn.audio:hover{background:#7e22ce;transform:translateY(-1px)}
.dl-btn.copy{background:transparent;border:1px solid var(--border);color:var(--muted);font-size:.82rem}
.dl-btn.copy:hover{border-color:var(--p);color:var(--p2)}

/* HISTORY */
.history{margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}
.history h3{font-size:.9rem;color:var(--muted);margin-bottom:10px;display:flex;align-items:center;gap:6px}
.history-list{display:flex;flex-direction:column;gap:6px;max-height:300px;overflow-y:auto}
.history-item{background:var(--card2);border:1px solid var(--border);border-radius:10px;padding:10px 14px;display:flex;align-items:center;gap:10px;cursor:pointer;transition:all 0.25s}
.history-item:hover{border-color:var(--p);background:rgba(24,119,242,0.04)}
.h-plat{font-size:.68rem;font-weight:700;color:#fff;padding:3px 8px;border-radius:5px;flex-shrink:0;text-transform:uppercase;letter-spacing:0.5px}
.h-body{flex:1;min-width:0}
.h-title{font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.h-time{color:var(--muted);font-size:.72rem}
.btn-clear-history{background:none;border:none;color:var(--accent);cursor:pointer;font-size:.78rem;font-family:inherit;margin-left:auto;padding:2px 8px;transition:color 0.2s}
.btn-clear-history:hover{text-decoration:underline;color:#ff6b81}

/* FEATURES */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:50px auto;max-width:700px}
.feat{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px 16px;text-align:center;transition:all 0.3s;backdrop-filter:blur(8px)}
.feat:hover{border-color:var(--p);transform:translateY(-4px);box-shadow:0 8px 30px rgba(24,119,242,0.08)}
.feat .feat-icon{font-size:1.4rem;margin-bottom:8px;color:var(--p2);width:48px;height:48px;background:rgba(24,119,242,0.08);border-radius:12px;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;transition:all 0.3s}
.feat:hover .feat-icon{background:rgba(24,119,242,0.15);transform:scale(1.05)}
.feat h4{font-size:.88rem;margin-bottom:4px}
.feat p{font-size:.76rem;color:var(--muted);line-height:1.5}

/* SEO CONTENT */
.seo-content{max-width:700px;margin:0 auto 50px;padding:0 20px}
.seo-content h2{color:var(--p2);font-size:1.4rem;margin:30px 0 14px;border-left:3px solid var(--p);padding-left:14px}
.seo-content h3{color:var(--text);font-size:1.05rem;margin:22px 0 10px}
.seo-content p{color:var(--muted);margin-bottom:14px;line-height:1.8}
.seo-content ul,.seo-content ol{padding-left:20px;color:var(--muted);margin-bottom:16px;line-height:1.8}
.seo-content li{margin-bottom:8px}
.seo-content strong{color:var(--text)}
.seo-content a{color:var(--p2);text-decoration:underline;text-underline-offset:2px}
.seo-content a:hover{color:#fff}
.seo-table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.86rem}
.seo-table th,.seo-table td{padding:11px 14px;border-bottom:1px solid var(--border);text-align:left}
.seo-table th{color:var(--p2);font-weight:700;background:rgba(24,119,242,0.06)}
.seo-table tr:hover{background:rgba(24,119,242,0.03)}
.seo-table td strong{color:var(--text)}

/* CALLOUT */
.callout-legal{background:var(--card);border:1px solid var(--border);border-left:4px solid var(--warn);border-radius:12px;padding:18px 22px;margin:24px 0;font-size:.88rem;color:var(--muted);line-height:1.7;backdrop-filter:blur(8px)}
.callout-legal strong{color:var(--warn)}

/* FAQ */
.faq-section{max-width:700px;margin:0 auto 50px}
.faq-section h2{color:var(--p2);font-size:1.4rem;margin-bottom:18px;border-left:3px solid var(--p);padding-left:14px}
.faq-item{border:1px solid var(--border);border-radius:12px;margin-bottom:8px;overflow:hidden;transition:border-color 0.3s}
.faq-item:hover{border-color:rgba(24,119,242,0.3)}
.faq-q{width:100%;padding:16px 20px;background:var(--card);border:none;color:var(--text);font-size:.92rem;font-weight:600;font-family:inherit;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:all 0.25s;gap:10px}
.faq-q:hover{color:var(--p2)}
.faq-q::after{content:'+';font-size:1.1rem;color:var(--p);flex-shrink:0;transition:transform 0.3s}
.faq-item.open .faq-q{background:var(--card2)}
.faq-item.open .faq-q::after{content:'−';color:var(--accent);transform:rotate(180deg)}
.faq-a{display:none;padding:16px 20px;color:var(--muted);font-size:.88rem;line-height:1.8;background:rgba(0,0,0,0.15)}
.faq-item.open .faq-a{display:block;animation:fadeIn 0.3s ease}

/* RELATED TOOLS */
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-top:16px}
.tool-link{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;display:flex;align-items:center;gap:14px;transition:all 0.3s;backdrop-filter:blur(8px)}
.tool-link:hover{border-color:var(--p);transform:translateY(-3px);box-shadow:0 8px 25px rgba(24,119,242,0.08)}
.tool-icon{width:42px;height:42px;background:rgba(24,119,242,0.08);border-radius:11px;display:flex;align-items:center;justify-content:center;color:var(--p2);flex-shrink:0;transition:all 0.3s}
.tool-link:hover .tool-icon{background:rgba(24,119,242,0.15);transform:scale(1.05)}
.tool-link h4{font-size:.88rem;margin:0}
.tool-link p{font-size:.75rem;color:var(--muted);margin:3px 0 0}

/* FOOTER */
.kth-footer{background:rgba(6,10,18,0.9);border-top:1px solid var(--border);padding:40px 0 24px;text-align:center;margin-top:auto;color:var(--muted);font-size:.85rem;backdrop-filter:blur(10px)}
.footer-links{display:flex;justify-content:center;gap:18px;flex-wrap:wrap;margin-bottom:14px}
.footer-links a{color:var(--muted);transition:color 0.25s}
.footer-links a:hover{color:var(--p2)}

/* TOAST */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(80px);background:rgba(14,22,38,0.95);border:1px solid var(--border);color:var(--text);padding:12px 24px;border-radius:12px;font-size:.88rem;z-index:999;opacity:0;transition:all 0.3s cubic-bezier(0.16,1,0.3,1);pointer-events:none;display:flex;align-items:center;gap:8px;max-width:90vw;backdrop-filter:blur(12px)}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}
.toast.success{border-color:var(--success);color:var(--success)}
.toast.warn{border-color:var(--warn);color:var(--warn)}
.toast.error{border-color:var(--accent);color:var(--accent)}

/* RESPONSIVE */
@media(max-width:768px){
  .hero h1{font-size:1.8rem}
  .hero{padding:45px 0 80px}
  .input-card{padding:18px;margin-top:-35px;border-radius:14px}
  .preview-card{grid-template-columns:1fr}
  .preview-thumb{width:100%;height:200px}
  .features{grid-template-columns:repeat(2,1fr);gap:10px}
  .header-links{display:none}
  .dl-buttons{flex-direction:column}
  .dl-btn{justify-content:center}
  .related-grid{grid-template-columns:1fr}
  .platforms{gap:6px}
  .plat{padding:6px 12px;font-size:.78rem}
}
@media(max-width:380px){
  .features{grid-template-columns:1fr}
  .hero h1{font-size:1.5rem}
}

/* === LIGHT THEME === */
[data-theme="light"] {
  --bg: #f4f7fb;
  --card: #ffffff;
  --card2: #ffffff;
  --border: rgba(0, 0, 0, 0.08);
  --text: #1e293b;
  --muted: #64748b;
  --p: #1877f2;
  --p2: #0284c7;
  --glow: 0 4px 15px rgba(24, 119, 242, 0.15);
}

[data-theme="light"] body::before { background: var(--bg); }
[data-theme="light"] body::after { background: radial-gradient(circle, rgba(24,119,242,0.06), transparent 60%); }
[data-theme="light"] .kth-header { background: rgba(255,255,255,0.9); }
[data-theme="light"] .logo { color: var(--p); }
[data-theme="light"] .logo span { color: #0f172a; }
[data-theme="light"] .logo:hover { color: #0f172a; }
[data-theme="light"] .hero h1 { background: linear-gradient(135deg, var(--p) 0%, #0f172a 40%, var(--p2) 70%, var(--accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
[data-theme="light"] .plat { background: var(--card); border-color: rgba(0,0,0,0.1); color: #475569; }
[data-theme="light"] .plat:hover { border-color: var(--p); color: var(--p); background: #f8fafc; }
[data-theme="light"] .input-card { box-shadow: 0 10px 40px rgba(0,0,0,0.08); background: rgba(255,255,255,0.95); }
[data-theme="light"] .url-input { background: #f8fafc; border-color: rgba(0,0,0,0.15); color: var(--text); }
[data-theme="light"] .url-input::placeholder { color: #94a3b8; }
[data-theme="light"] .url-input:focus { background: #fff; border-color: var(--p); box-shadow: 0 0 0 3px rgba(24,119,242,0.1); }
[data-theme="light"] .act-btn { background: #f1f5f9; color: #475569; border-color: transparent; }
[data-theme="light"] .act-btn:hover { background: #e2e8f0; color: var(--p); }
[data-theme="light"] .btn-download { color: #fff; box-shadow: 0 4px 15px rgba(24,119,242,0.3); }
[data-theme="light"] .btn-download:hover { box-shadow: 0 6px 20px rgba(24,119,242,0.4); }
[data-theme="light"] .preview-card { background: #fff; border-color: rgba(0,0,0,0.08); box-shadow: 0 4px 12px rgba(0,0,0,0.03); }
[data-theme="light"] .preview-thumb { background: #e2e8f0; }
[data-theme="light"] .dl-btn.copy { background: #f8fafc; border-color: rgba(0,0,0,0.1); color: #475569; }
[data-theme="light"] .dl-btn.copy:hover { border-color: var(--p); color: var(--p); background: #fff; }
[data-theme="light"] .history-item { background: #fff; border-color: rgba(0,0,0,0.08); }
[data-theme="light"] .history-item:hover { background: #f8fafc; border-color: var(--p); }
[data-theme="light"] .feat { background: #fff; border-color: rgba(0,0,0,0.08); box-shadow: 0 4px 12px rgba(0,0,0,0.03); }
[data-theme="light"] .feat:hover { box-shadow: 0 8px 24px rgba(24,119,242,0.08); }
[data-theme="light"] .seo-table th { background: #f1f5f9; color: #0f172a; }
[data-theme="light"] .seo-table tr:hover { background: #f8fafc; }
[data-theme="light"] .callout-legal { background: #fffaf0; border-color: #fde68a; color: #92400e; }
[data-theme="light"] .faq-q { background: #fff; border-color: rgba(0,0,0,0.08); }
[data-theme="light"] .faq-item.open .faq-q { background: #f8fafc; }
[data-theme="light"] .faq-a { background: #f1f5f9; color: #475569; }
[data-theme="light"] .tool-link { background: #fff; border-color: rgba(0,0,0,0.08); box-shadow: 0 4px 12px rgba(0,0,0,0.03); }
[data-theme="light"] .tool-link:hover { box-shadow: 0 8px 20px rgba(24,119,242,0.08); }
[data-theme="light"] .kth-footer { background: #f8fafc; border-top-color: rgba(0,0,0,0.08); }
[data-theme="light"] .toast { background: #fff; box-shadow: 0 10px 30px rgba(0,0,0,0.1); border-color: rgba(0,0,0,0.08); color: var(--text); }
[data-theme="light"] .theme-btn { color: #64748b; }
[data-theme="light"] .theme-btn:hover { background: rgba(0,0,0,0.05); color: var(--p); }