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:root{--bg:#f7f7f5;--panel:#fff;--text:#1f2328;--muted:#525b67;--border:#e5e7eb;--accent:#0e5a58;--accent-text:#fff;--band-unknown:#b8bec7;--band-weak:#e5484d;--band-learning:#f5a524;--band-mastered:#30a46c;--ok-bg:#e9f7ef;--bad-bg:#fdecec;--echo-teal-dark:#072a2a;--echo-teal:#0e5a58;--echo-teal-light:#167a77;--echo-emerald:#14b8a6;--echo-emerald-light:#2dd4bf;--echo-gold:#f4b400;--echo-gold-hover:#dfa400;--echo-cream:#fff7e6;--echo-canvas:#fbf7ee;--echo-navy:#0b2d3b;--echo-navy-dark:#071e27;--auth-bg-gradient:radial-gradient(ellipse at 50% -10%, color-mix(in srgb, var(--echo-teal) 14%, var(--bg)) 0%, color-mix(in srgb, var(--echo-gold) 6%, var(--bg)) 55%, var(--bg) 100%);--auth-glow-teal:#0e5a5829;--auth-glow-gold:#f4b4001f;--auth-card-bg:color-mix(in srgb, var(--panel) 92%, #fff);--auth-card-border:color-mix(in srgb, var(--border) 75%, var(--echo-teal) 25%);--auth-card-shadow:0 24px 50px -12px #0b2d3b24, 0 0 1px 1px #0b2d3b0d;--auth-card-radius:var(--ui-radius-lg);--auth-input-bg:var(--panel);--auth-input-border:color-mix(in srgb, var(--border) 80%, var(--echo-teal) 20%);--auth-input-focus-border:var(--echo-teal);--auth-input-focus-ring:#0e5a5838;--auth-input-radius:var(--ui-radius);--auth-tab-bg:color-mix(in srgb, var(--border) 45%, var(--bg));--auth-tab-text:var(--muted);--auth-tab-active-bg:var(--panel);--auth-tab-active-text:var(--echo-teal);--auth-tab-active-shadow:0 2px 8px #0b2d3b14;--auth-chip-bg:var(--bg);--auth-chip-border:var(--border);--auth-chip-text:var(--muted);--auth-chip-active-bg:color-mix(in srgb, var(--echo-teal) 12%, var(--panel));--auth-chip-active-border:var(--echo-teal);--auth-chip-active-text:var(--echo-teal);--auth-btn-primary-bg:linear-gradient(135deg, var(--echo-teal) 0%, #0a4645 100%);--auth-btn-primary-text:#fff;--auth-btn-primary-border:var(--echo-teal);--auth-btn-primary-shadow:0 4px 14px 0 #0e5a5852;--auth-btn-primary-hover-bg:linear-gradient(135deg, var(--echo-teal-light) 0%, var(--echo-teal) 100%);--auth-btn-primary-hover-shadow:0 6px 20px 0 #0e5a586b;--auth-btn-google-bg:var(--panel);--auth-btn-google-border:var(--border);--auth-btn-google-text:var(--text);--auth-btn-google-hover-bg:color-mix(in srgb, var(--border) 30%, var(--panel));--auth-btn-google-shadow:0 1px 3px #0000000f;--auth-highlight-bg:color-mix(in srgb, var(--echo-teal) 6%, var(--bg));--auth-highlight-border:color-mix(in srgb, var(--echo-teal) 35%, var(--border))}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#08141c;--panel:#0e1f2a;--text:#e8f1f5;--muted:#a6b8c2;--border:#1d3746;--accent:#14b8a6;--accent-text:#041717;--band-unknown:#5b6168;--ok-bg:#0a3325;--bad-bg:#3a1618;--echo-teal-dark:#041717;--echo-teal:#14b8a6;--echo-teal-light:#2dd4bf;--echo-emerald:#2dd4bf;--echo-gold:#fbbf24;--echo-cream:#1f272a;--echo-canvas:#0a1822;--echo-navy:#0e2733;--auth-bg-gradient:radial-gradient(ellipse at 50% -10%, #172554 0%, #0f172a 45%, #090d16 100%);--auth-glow-teal:#38bdf81f;--auth-glow-gold:#fbbf2414;--auth-card-bg:#0f172ad1;--auth-card-border:#ffffff14;--auth-card-shadow:0 32px 64px -16px #000000d9, 0 0 0 1px #ffffff0d;--auth-input-bg:#0f172a99;--auth-input-border:#ffffff1f;--auth-input-focus-border:#38bdf8;--auth-input-focus-ring:#38bdf838;--auth-tab-bg:#0000004d;--auth-tab-text:#94a3b8;--auth-tab-active-bg:#ffffff1a;--auth-tab-active-text:#fff;--auth-tab-active-shadow:0 2px 6px #0006;--auth-chip-bg:transparent;--auth-chip-border:#ffffff1a;--auth-chip-text:#94a3b8;--auth-chip-active-bg:#38bdf81f;--auth-chip-active-border:#38bdf8;--auth-chip-active-text:#38bdf8;--auth-btn-primary-bg:linear-gradient(135deg, #059669 0%, #10b981 50%, #0ea5e9 100%);--auth-btn-primary-text:#fff;--auth-btn-primary-border:#ffffff26;--auth-btn-primary-shadow:0 4px 18px 0 #10b98159;--auth-btn-primary-hover-bg:linear-gradient(135deg, #10b981 0%, #059669 50%, #0284c7 100%);--auth-btn-primary-hover-shadow:0 6px 24px 0 #10b98180;--auth-btn-google-bg:#ffffff0d;--auth-btn-google-border:#ffffff1a;--auth-btn-google-text:#f1f5f9;--auth-btn-google-hover-bg:#ffffff17;--auth-btn-google-shadow:0 2px 8px #0000004d;--auth-highlight-bg:#38bdf814;--auth-highlight-border:#38bdf840}:root[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);font-family:var(--font-body), system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;font-size:var(--ui-fs-base);font-weight:var(--ui-fw-normal);margin:0}button{font:inherit;cursor:pointer;border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:var(--ui-radius);padding:8px 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