:root{color-scheme:light;--page: #f7f8fa;--card: #ffffff;--surface: #f9fafb;--input: #fcfcfd;--text: #20262c;--muted: #737b86;--subtle: #8c949e;--border: #e6e9ed;--soft-border: #eef0f3;--input-border: #dfe3e8;--accent: #27997e;--accent-hover: #20836b;--accent-soft: #edf8f4;--accent-border: #d9eee6;--focus: #86cdbb;--error: #ba4444;--error-soft: #fff5f4;--error-border: #f5d9d5;--shadow: 0 4px 6px -4px #1a243307, 0 12px 35px -15px #1a243316}:root[data-theme=dark]{color-scheme:dark;--page: #101214;--card: #191c1f;--surface: #1e2226;--input: #16191c;--text: #e9edf0;--muted: #a0a8b1;--subtle: #858e99;--border: #2d3238;--soft-border: #282d32;--input-border: #373e45;--accent: #319e83;--accent-hover: #298b73;--accent-soft: #1d332d;--accent-border: #2a493e;--focus: #4cae94;--error: #f0928c;--error-soft: #332222;--error-border: #583333;--shadow: 0 8px 35px -12px 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var(--border);padding:6px;background:var(--card);border-radius:12px;box-shadow:var(--shadow)}.tool-menu nav a{padding:13px 11px;display:flex;justify-content:space-between;border-radius:7px}.tool-menu nav a:hover,.tool-menu nav a[aria-current]{background:var(--surface)}main{flex:1;display:grid;place-items:center;padding:24px 20px 36px}.converter-layout{width:100%;max-width:540px}.intro{text-align:center;margin-bottom:30px}.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:9px;font-weight:650;letter-spacing:2.1px}.eyebrow>span{height:5px;width:5px;border-radius:50%;background:var(--accent)}h1{margin:20px 0 14px;font-size:clamp(34px,4vw,43px);letter-spacing:-2.2px;line-height:1.3;font-weight:740}h1>span{color:var(--accent)}.intro>p{color:var(--muted);font-size:13px;line-height:1.7;margin:0;letter-spacing:-.25px}.converter-card{background:var(--card);border:1px solid var(--border);border-radius:19px;padding:27px 28px 0;box-shadow:var(--shadow);overflow:hidden}.card-heading{display:flex;align-items:center;gap:12px;margin-bottom:27px}.audio-icon{width:45px;height:45px;border:1px solid var(--accent-border);border-radius:13px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center}.card-heading h2{font-size:16px;font-weight:650;letter-spacing:-.4px;margin:0 0 5px}.card-heading p{color:var(--muted);font-size:11px;margin:0}.format-badge{margin-left:auto;padding:4px 7px;border:1px solid var(--border);border-radius:5px;color:var(--muted);font-size:9px;letter-spacing:.7px;font-weight:650}.input-label{display:block;margin-bottom:9px;font-size:12px;font-weight:600}.url-field{display:flex;align-items:center;gap:9px;padding:6px 6px 6px 13px;border:1px solid var(--input-border);border-radius:10px;background:var(--input);min-height:51px;transition:border-color .15s,box-shadow .15s}.url-field>svg{flex-shrink:0;color:var(--subtle)}.url-field:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.url-field.invalid{border-color:var(--error)}.url-field input{min-width:0;flex:1;width:100%;border:0;outline:0;background:transparent;color:var(--text);font-size:12px;padding:8px 0}.url-field input:focus-visible{outline:0}.url-field input::placeholder{color:var(--subtle)}.paste-button{background:var(--card);border:1px solid var(--border);padding:9px 10px;border-radius:7px;display:flex;align-items:center;gap:5px;white-space:nowrap;font-size:11px;font-weight:550;min-height:36px}.paste-button:hover{background:var(--surface)}.clear-button{background:none;border:0;padding:6px;display:grid;place-items:center;color:var(--muted)}.input-hint{margin:9px 0 22px;color:var(--subtle);font-size:10px;line-height:1.5}.output-setting{display:flex;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid 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