:root{--navy:#102a43;--blue:#1677d2;--light:#f4f7fb;--border:#dbe4ee;--text:#243b53;--muted:#6b7c93;--danger:#c0392b;--ok:#18794e}*{box-sizing:border-box}body{margin:0;background:var(--light);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;line-height:1.6}a{color:inherit}.topbar{height:68px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100% - 1180px)/2));position:sticky;top:0;z-index:5}.topbar.admin{background:var(--navy);color:#fff}.logo{text-decoration:none;font-weight:800;font-size:20px;letter-spacing:.05em}.logo span{font-weight:400}.topbar nav{display:flex;gap:6px;align-items:center}.topbar nav a{text-decoration:none;padding:9px 12px;border-radius:8px;font-size:14px}.topbar nav a:hover,.topbar nav a.active{background:rgba(22,119,210,.12)}.admin nav a:hover,.admin nav a.active{background:rgba(255,255,255,.14)}.container{max-width:1180px;margin:34px auto;padding:0 20px}.container.narrow{max-width:760px}.page-title{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:24px}.page-title h1{margin:0;font-size:28px}.page-title p{margin:4px 0;color:var(--muted)}.company-chip{background:#fff;border:1px solid var(--border);padding:8px 14px;border-radius:999px}.panel{background:#fff;border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:0 5px 18px rgba(16,42,67,.04);margin-bottom:24px}.panel h2{margin-top:0}.panel-head{display:flex;justify-content:space-between;align-items:center}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}.stat{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px}.stat strong{font-size:30px;display:block;color:var(--blue)}.stat span{color:var(--muted)}.two-col{display:grid;grid-template-columns:340px 1fr;gap:20px}.invoice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.invoice-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px;box-shadow:0 5px 18px rgba(16,42,67,.04)}.month{font-size:22px;font-weight:700}.file-name{color:var(--muted);word-break:break-all;margin:6px 0 12px}.status{display:inline-block;border-radius:999px;padding:4px 10px;font-size:12px;margin-bottom:12px}.status.new{background:#fff3cd;color:#815c00}.status.done{background:#e7f6ee;color:var(--ok)}.invoice-card small{display:block;color:var(--muted);margin-bottom:14px}.form-grid{display:grid;gap:16px}.form-grid label,.installer-form label,.login-card label{display:grid;gap:6px;font-weight:600}.form-grid small,.installer-form small{font-weight:400;color:var(--muted)}input,select{width:100%;padding:11px 12px;border:1px solid #bdc9d6;border-radius:8px;background:#fff;font:inherit}input:focus,select:focus{outline:3px solid rgba(22,119,210,.15);border-color:var(--blue)}.btn{display:inline-flex;justify-content:center;align-items:center;border:1px solid var(--border);background:#fff;padding:10px 16px;border-radius:8px;text-decoration:none;cursor:pointer;font-weight:700}.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff}.btn.danger{color:var(--danger)}.btn.full{width:100%}.btn.small{padding:7px 11px}.btn.tiny{padding:5px 8px;font-size:12px}.inline{display:inline-flex;gap:5px;align-items:center}.pad{padding:8px 0}.alert{padding:13px 15px;border-radius:9px;margin-bottom:18px}.alert.error{background:#fdecea;color:#8a1c12}.alert.success{background:#e7f6ee;color:#12633f}.badge{display:inline-block;padding:3px 8px;border-radius:999px;font-size:12px}.badge.ok{background:#e7f6ee;color:var(--ok)}.badge.warn{background:#fff3cd;color:#815c00}.badge.off{background:#edf0f3;color:#5e6c78}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;white-space:nowrap}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--border);vertical-align:top}th{font-size:13px;color:var(--muted)}.search{display:flex;gap:6px}.login-page,.install-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(145deg,#edf4fb,#f8fbfe)}.login-card,.install-wrap{width:min(100%,440px);background:#fff;border:1px solid var(--border);border-radius:18px;padding:32px;box-shadow:0 18px 50px rgba(16,42,67,.10);text-align:center}.install-wrap{width:min(100%,650px);text-align:left}.install-wrap>.brand-mark,.install-wrap>h1,.install-wrap>.muted{text-align:center}.brand-mark{width:54px;height:54px;border-radius:15px;background:var(--navy);color:#fff;display:grid;place-items:center;margin:0 auto 12px;font-size:28px;font-weight:800}.login-card h1,.install-wrap h1{margin:0}.muted{color:var(--muted)}.login-card form{display:grid;gap:16px;text-align:left;margin-top:24px}.admin-link{display:block;margin-top:20px;color:var(--muted);font-size:13px}.installer-form{display:grid;gap:15px}.installer-form h2{border-bottom:1px solid var(--border);padding-bottom:7px;margin:18px 0 0}.security-note{margin-top:20px;background:#fff3cd;padding:12px;border-radius:8px}.site-footer{text-align:center;color:var(--muted);font-size:12px;padding:30px}.empty{background:#fff;border:1px dashed var(--border);padding:40px;text-align:center;border-radius:14px}details summary{cursor:pointer;color:var(--blue);font-size:12px;margin-top:5px}@media(max-width:850px){.stats{grid-template-columns:repeat(2,1fr)}.two-col{grid-template-columns:1fr}.invoice-grid{grid-template-columns:1fr 1fr}.topbar{padding:0 12px}.topbar nav{overflow:auto}.topbar nav a{padding:7px 8px;font-size:12px}.page-title{align-items:flex-start;flex-direction:column}}@media(max-width:560px){.invoice-grid,.stats{grid-template-columns:1fr}.container{margin-top:22px}.panel{padding:16px}.login-card,.install-wrap{padding:22px}.page-title h1{font-size:24px}}