:root{color-scheme:light;font-family:Segoe UI,Tahoma,Arial,sans-serif;color:#0f172a;--ink: #0f172a;--muted: #64748b;--teal: #0f766e;--teal-dark: #115e59;--coral: #e05642;--gold: #b7791f;--blue: #2563eb;--shadow: 0 20px 50px rgba(15, 23, 42, .08);--glass-bg: rgba(255, 255, 255, .82);--glass-border: rgba(148, 163, 184, .25);--glass-blur: 18px;--sidebar-text: #1e2937;--sidebar-text-muted: #64748b;--sidebar-nav-bg: rgba(15, 23, 42, .04);--sidebar-nav-active-bg: rgba(15, 118, 110, .12);--sidebar-nav-hover-bg: rgba(15, 23, 42, .06)}.dark{color-scheme:dark;--ink: #f1f5f9;--muted: #94a3b8;--teal: #14b8a6;--teal-dark: #0f766e;--coral: #f87171;--gold: #fbbf24;--blue: #60a5fa;--shadow: 0 25px 60px rgba(0, 0, 0, .45);--glass-bg: rgba(15, 23, 42, .65);--glass-border: rgba(148, 163, 184, .18);--glass-blur: 22px;--sidebar-text: #f1f5f9;--sidebar-text-muted: #94a3b8;--sidebar-nav-bg: rgba(255, 255, 255, .04);--sidebar-nav-active-bg: rgba(255, 255, 255, .12);--sidebar-nav-hover-bg: rgba(255, 255, 255, .08)}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(135deg,#f1f5f9,#e0e7ff);color:var(--ink)}html.dark body{background:linear-gradient(145deg,#0b1120,#1e2937)}*{box-sizing:border-box}::selection{background:#0f766e4d;color:inherit}button,input{font:inherit}button{cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1)}input:focus{outline:none;border-color:var(--teal)}.app-shell{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:100vh;background:transparent}.sidebar{display:flex;flex-direction:column;gap:24px;padding:28px 20px;background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border-right:1px solid var(--glass-border);color:var(--sidebar-text);box-shadow:0 0 0 1px #ffffff0d inset}.brand-block,.workflow-title,.format-main,.video-meta,.top-actions,.download-top,.download-meta,.history-item,.privacy-item,.setting-row{display:flex;align-items:center}.brand-block{gap:12px;min-height:52px}.brand-block strong{display:block;font-size:1.18rem;font-weight:700;color:var(--sidebar-text)}.brand-block span{color:var(--sidebar-text-muted);font-size:.78rem;font-weight:500}.brand-mark{display:grid;width:48px;height:48px;place-items:center;border-radius:12px;overflow:hidden;border:1px solid var(--glass-border);box-shadow:0 4px 12px #0000001a}.brand-mark img{width:44px;height:44px;object-fit:cover;display:block}.nav-list{display:grid;gap:7px}.nav-item{display:flex;align-items:center;gap:12px;width:100%;min-height:46px;padding:0 14px;border:1px solid transparent;border-radius:12px;background:var(--sidebar-nav-bg);color:var(--sidebar-text);text-align:right;transition:all .2s cubic-bezier(.4,0,.2,1)}.nav-item.active{background:var(--sidebar-nav-active-bg);color:var(--sidebar-text);border-color:var(--glass-border);box-shadow:0 4px 12px #00000014}.nav-item:hover{background:var(--sidebar-nav-hover-bg);color:var(--sidebar-text);border-color:var(--glass-border)}.main-area{min-width:0;padding:32px 36px;background:transparent}.topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:28px;padding:16px 22px;background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);border-radius:16px;box-shadow:var(--shadow)}.eyebrow,.section-kicker{display:inline-flex;color:var(--teal);font-size:.78rem;font-weight:700;letter-spacing:.5px;text-transform:uppercase}.topbar h1,.panel-copy h2,.result-details h2,.page-heading h2,.empty-state h2{margin:4px 0 0;color:var(--ink);letter-spacing:0}.topbar h1{font-size:clamp(1.45rem,2.2vw,2.1rem);font-weight:700}.top-actions{gap:10px}.icon-button{display:grid;width:44px;height:44px;place-items:center;border:1px solid var(--glass-border);border-radius:12px;color:var(--ink);background:var(--glass-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:all .2s ease}.icon-button:hover{background:#ffffff1f;border-color:var(--glass-border);transform:translateY(-1px)}.content-grid{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}.primary-pane,.stack{min-width:0}.stack{display:grid;gap:18px}.analyzer-panel,.page-panel,.empty-state,.result-layout{background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}.analyzer-panel{display:grid;gap:22px;padding:28px}.panel-copy h2{max-width:760px;font-size:clamp(1.45rem,3vw,2.35rem);line-height:1.25}.url-box{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;min-height:66px;padding:10px 14px 10px 12px;background:#ffffff14;border:1px solid var(--glass-border);border-radius:14px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.url-box input{min-width:0;border:0;outline:0;background:transparent;color:var(--ink)}.url-box button,.format-row button,.subtle-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border:0;border-radius:12px;background:linear-gradient(135deg,var(--teal),var(--teal-dark));color:#fff;font-weight:700;font-size:.95rem;white-space:nowrap;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 14px #0f766e4d}.url-box button:hover,.format-row button:hover,.subtle-button:hover{transform:translateY(-1px);box-shadow:0 6px 20px #0f766e66}.url-box button:active{transform:translateY(0)}.url-box button:disabled{opacity:.6;transform:none}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-text{margin:0;color:#b91c1c;font-weight:700}.notice-text{margin:0;padding:12px 14px;border:1px solid #f7d6a7;border-radius:8px;background:#fff8eb;color:#8a5a13;font-weight:700;line-height:1.65}.result-layout{display:grid;grid-template-columns:42% minmax(0,1fr);overflow:hidden}.video-preview{position:relative;min-height:330px;background:#0f172a}.video-preview img{width:100%;height:100%;object-fit:cover;display:block}.play-chip{position:absolute;inset:50% auto auto 50%;display:grid;width:58px;height:58px;place-items:center;border:0;border-radius:50%;background:#fff;color:var(--coral);transform:translate(-50%,-50%)}.result-details{padding:22px}.video-meta{flex-wrap:wrap;gap:10px;color:var(--muted);font-size:.9rem}.video-meta span{display:inline-flex;align-items:center;gap:5px}.result-details h2{font-size:1.55rem;line-height:1.35}.result-details p,.muted,.empty-state p{color:var(--muted)}.formats-list{display:grid;gap:10px;margin-top:18px}.format-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:#ffffff0f;border:1px solid var(--glass-border);border-radius:14px;transition:all .2s ease}.format-row:hover{background:#ffffff1a;border-color:#fff3}.format-main{gap:10px;min-width:0}.format-main strong,.format-main small{display:block}.format-main small{color:var(--muted);margin-top:3px}.format-icon{display:grid;width:38px;height:38px;flex:0 0 auto;place-items:center;border-radius:8px;color:#fff}.format-icon.video{background:var(--blue)}.format-icon.audio{background:var(--gold)}.format-icon.image{background:var(--coral)}.empty-state{display:grid;place-items:center;gap:10px;min-height:330px;padding:28px;text-align:center}.empty-visual{display:flex;align-items:center;justify-content:center;gap:14px;width:min(100%,420px);min-height:132px;border-radius:16px;background:#ffffff14;border:1px solid var(--glass-border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);color:var(--teal)}.page-panel{padding:26px}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px}.subtle-button{background:#ffffff1a;color:var(--ink);border:1px solid var(--glass-border);box-shadow:none}.download-list,.history-list,.settings-grid,.language-options,.privacy-list{display:grid;gap:12px}.download-item,.history-item,.setting-row,.language-option,.privacy-item{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:14px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.download-item{padding:14px}.download-top,.download-meta{justify-content:space-between;gap:12px}.download-top span{color:var(--teal-dark);font-weight:800}.download-meta{margin-top:6px;color:var(--muted);font-size:.88rem}.progress-track{height:8px;overflow:hidden;margin-top:12px;border-radius:999px;background:#dbe4e9}.progress-track span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--teal),var(--coral))}.history-item,.setting-row,.privacy-item{gap:11px;padding:14px}.history-item small,.setting-row small{display:block;color:var(--muted);margin-top:3px}.setting-row{grid-template-columns:auto minmax(0,1fr) auto}.language-option{display:flex;align-items:center;justify-content:space-between;min-height:54px;padding:0 14px;color:var(--ink)}.language-option.active{border-color:var(--teal);background:#eef6f5;color:var(--teal-dark);font-weight:800}.privacy-item p{margin:0;color:var(--muted);line-height:1.75}@media(max-width:1120px){.app-shell{grid-template-columns:1fr}.sidebar{position:sticky;top:0;z-index:10;flex-direction:row;align-items:center;overflow-x:auto;padding:12px}.brand-block{flex:0 0 auto}.nav-list{display:flex;flex:1 0 auto}.nav-item{width:auto}.content-grid{grid-template-columns:1fr}}@media(max-width:720px){body{background:#f8fbfc}.app-shell{display:block;padding-bottom:78px}.sidebar{position:fixed;inset:auto 0 0;z-index:20;display:block;padding:8px 8px calc(8px + env(safe-area-inset-bottom));border-top:1px solid var(--glass-border);background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));box-shadow:0 -10px 30px #0f172a1a}.brand-block{display:none}.nav-list{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}.nav-item{display:grid;justify-items:center;gap:3px;min-height:58px;padding:5px 3px;border-radius:8px;font-size:.68rem;text-align:center}.nav-item svg{width:18px;height:18px}.main-area{padding:16px 12px 22px}.topbar,.page-heading{align-items:flex-start;flex-direction:column}.url-box,.result-layout{grid-template-columns:1fr}.url-box{padding:14px}.url-box button{width:100%}.video-preview{min-height:220px}.format-row{align-items:stretch;flex-direction:column}.format-row button,.subtle-button{width:100%}}