:root{--bg: #f7f7f8;--surface: #ffffff;--text: #1a1a1e;--muted: #6b6b76;--border: #e2e2e6;--primary: #4f46e5;--primary-text: #ffffff;--danger: #dc2626;--radius: 12px;color-scheme:light dark}@media (prefers-color-scheme: dark){:root{--bg: #121214;--surface: #1c1c1f;--text: #f0f0f2;--muted: #9a9aa2;--border: #2e2e33;--primary: #6366f1;--primary-text: #ffffff;--danger: #f87171}}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.app-shell{display:flex;min-height:100vh}.content{flex:1;padding:16px 16px 88px;max-width:720px;margin:0 auto;width:100%}.page h2{margin-top:0}.section-spacer{margin-top:32px}.field-label{display:block;margin:14px 0 6px;font-size:.85rem;color:var(--muted)}.input{width:100%;padding:12px 14px;font-size:1rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text)}textarea.input{resize:vertical;min-height:90px;font-family:inherit}.textarea-lg{min-height:180px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 20px;margin-top:16px;font-size:1rem;font-weight:600;border:none;border-radius:var(--radius);cursor:pointer}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:var(--primary-text);width:100%}.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn-danger{background:transparent;color:var(--danger);border:1px solid var(--danger)}.error-text{color:var(--danger);font-size:.9rem}.muted{color:var(--muted)}.small{font-size:.8rem}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.login-card{width:100%;max-width:360px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.result-card,.proposal-detail{margin-top:20px;padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.result-header{display:flex;justify-content:space-between;align-items:center}.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.chip{padding:8px 14px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:.85rem;cursor:pointer}.chip-active{background:var(--primary);color:var(--primary-text);border-color:var(--primary)}.proposal-list{list-style:none;margin:0;padding:0}.proposal-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;background:var(--surface);overflow:hidden}.proposal-summary{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;background:none;border:none;text-align:left;color:var(--text);cursor:pointer;min-height:56px}.proposal-detail{margin:0;border-radius:0;border:none;border-top:1px solid var(--border)}.portfolio-item{border:1px solid var(--border);border-radius:var(--radius);padding:14px;margin-bottom:12px;background:var(--surface);display:flex;flex-direction:column;gap:8px}.new-item h3{margin:0 0 4px}.sidebar{display:none}.tab-bar{position:fixed;bottom:0;left:0;right:0;display:flex;background:var(--surface);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom)}.tab-link,.nav-link{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 0;min-height:56px;justify-content:center;text-decoration:none;color:var(--muted);font-size:.75rem}.tab-link.active,.nav-link.active{color:var(--primary)}.nav-icon{font-size:1.2rem}@media (min-width: 900px){.tab-bar{display:none}.sidebar{display:flex;flex-direction:column;width:220px;padding:20px 12px;border-right:1px solid var(--border);background:var(--surface)}.brand{font-weight:700;font-size:1.1rem;padding:0 12px 20px}.sidebar .nav-link{flex-direction:row;justify-content:flex-start;gap:10px;padding:12px;border-radius:var(--radius);font-size:.95rem}.sidebar .nav-link.active{background:var(--bg)}.logout-btn{margin-top:auto;padding:12px;border:1px solid var(--border);background:none;color:var(--text);border-radius:var(--radius);cursor:pointer}.content{padding-bottom:32px}}