:root{--bg:#f4f7fb;--surface:#fff;--text:#0f172a;--muted:#64748b;--blue:#2563eb;--cyan:#0ea5e9;--green:#16a34a;--border:#dbe3ef;--shadow:0 22px 60px rgba(15,23,42,.10);--radius:24px;--max:1180px}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 18% 8%,rgba(37,99,235,.12),transparent 28%),linear-gradient(180deg,#f8fbff,#eef4fb);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif;line-height:1.6}a{text-decoration:none;color:inherit}.wrap{width:min(var(--max),calc(100% - 32px));margin:0 auto}header{padding:24px 0}.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 16px;border:1px solid var(--border);border-radius:999px;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);box-shadow:var(--shadow)}.brand{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:-.04em}.brand-mark{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff}.nav-links{display:flex;gap:10px;flex-wrap:wrap}.nav-links a{padding:9px 12px;border-radius:999px;color:var(--muted);font-weight:700;font-size:14px}.nav-links a:hover{background:#eef4ff;color:var(--text)}.hero{padding:58px 0 28px;text-align:center}.eyebrow{display:inline-flex;gap:10px;align-items:center;padding:8px 13px;border-radius:999px;background:#eaf1ff;color:#1d4ed8;font-weight:850;font-size:13px}.eyebrow span{width:8px;height:8px;border-radius:50%;background:var(--green)}h1{font-size:clamp(42px,6vw,76px);line-height:.96;letter-spacing:-.07em;margin:22px auto 16px;max-width:900px}.lead{color:var(--muted);font-size:clamp(18px,2vw,21px);max-width:760px;margin:0 auto}.section{padding:38px 0 76px}.grid{display:grid;grid-template-columns:1.3fr .7fr;gap:24px;align-items:start}.grid.single{grid-template-columns:1fr}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.card.narrow{max-width:760px;margin:0 auto}.center{text-align:center}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:grid;gap:7px}.field.full{grid-column:1/-1}label{font-weight:800;font-size:14px}input,select,textarea{width:100%;border:1px solid var(--border);border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text)}textarea{min-height:130px;resize:vertical}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 20px;border-radius:15px;border:1px solid var(--border);font-weight:900;cursor:pointer;background:#fff;color:var(--text)}.btn-primary{border-color:transparent;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 14px 34px rgba(37,99,235,.24)}.btn-secondary{background:#f8fafc}.btn:disabled{opacity:.55;cursor:not-allowed}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.muted{color:var(--muted)}.small{font-size:13px}.notice{margin-top:18px;padding:16px;border-radius:18px;background:#f8fafc;border:1px solid var(--border);color:var(--muted)}.flash-wrap{margin-bottom:12px}.flash{padding:14px 16px;border-radius:16px;margin-bottom:12px}.flash.error{background:#fee2e2;color:#991b1b}.flash.success{background:#dcfce7;color:#166534}.letter-preview{background:#fff;border:1px solid var(--border);border-radius:18px;padding:42px;box-shadow:0 18px 45px rgba(15,23,42,.08);font-family:Arial,sans-serif;min-height:720px}.letter-top{display:grid;grid-template-columns:1fr 1fr;gap:20px}.letter-sender,.letter-date,.letter-recipient{white-space:pre-line;font-size:14px}.letter-date{text-align:right}.letter-recipient{margin-top:58px}.letter-subject{margin-top:58px;font-weight:800}.letter-body{white-space:pre-line;margin-top:28px;font-size:16px;line-height:1.72}.letter-footer{white-space:pre-line;margin-top:32px}.list{display:grid;gap:12px}.item{padding:14px;border-radius:16px;background:#f8fafc;border:1px solid var(--border)}.item strong{display:block}.status-pill{display:inline-flex;padding:5px 10px;border-radius:999px;background:#eaf1ff;color:#1d4ed8;font-weight:800;font-size:12px}.footerline{border-top:1px solid var(--border);padding:24px 0 38px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:14px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--border)}th{font-size:13px;color:var(--muted)}@media(max-width:900px){.grid,.form-grid,.letter-top{grid-template-columns:1fr}.nav{border-radius:22px;align-items:flex-start}.nav-links{display:none}.letter-date{text-align:left}.letter-preview{padding:24px}.hero{padding-top:34px}}