:root{
  --paper:#F6F3EC;
  --ink:#20201D;
  --ink-soft:#5B5750;
  --seal:#AE3A2E;
  --seal-dark:#8C2E24;
  --jade:#2F6F5E;
  --line:#DAD3C3;
  --card:#FFFDF8;
  --danger:#B23A2E;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter',sans-serif;
  min-height:100vh;
  background-image:
    radial-gradient(circle at 15% 10%, rgba(174,58,46,0.05), transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(47,111,94,0.06), transparent 45%);
}
h1,h2,h3,.brand{ font-family:'Noto Serif SC', serif; }
a{ color:var(--seal); }
button{ font-family:'Inter',sans-serif; cursor:pointer; }

/* ---------- Top bar (signature cloud motif) ---------- */
.cloud-rule{
  height:28px;
  width:100%;
  background-repeat:repeat-x;
  background-size:120px 28px;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='28' viewBox='0 0 120 28'><path d='M0 20 C10 8, 22 8, 30 16 C36 6, 52 6, 58 16 C64 8, 78 8, 86 18 C94 8, 108 8, 120 20' fill='none' stroke='%23DAD3C3' stroke-width='2'/></svg>");
  opacity:0.9;
}
header.top{
  display:flex; align-items:center; justify-content:space-between;
  padding:20px 32px 8px;
  max-width:1080px; margin:0 auto;
}
.brand{ display:flex; align-items:center; gap:12px; font-size:22px; font-weight:700; letter-spacing:0.5px;}
.seal-badge{
  width:34px;height:34px;border-radius:6px;background:var(--seal);
  color:#F6E9CF; display:flex; align-items:center; justify-content:center;
  font-family:'Noto Serif SC',serif; font-weight:700; font-size:17px;
  box-shadow:0 2px 0 var(--seal-dark);
  transform:rotate(-2deg);
}
.user-pill{ display:flex; align-items:center; gap:10px; font-size:14px; color:var(--ink-soft);}
.btn{
  border:1px solid var(--ink);
  background:transparent;
  padding:8px 16px;
  border-radius:2px;
  font-size:14px;
  font-weight:500;
  transition:all .15s ease;
}
.btn:hover{ background:var(--ink); color:var(--paper); }
.btn.primary{ background:var(--seal); border-color:var(--seal); color:#FBF1E1; }
.btn.primary:hover{ background:var(--seal-dark); border-color:var(--seal-dark); }
.btn.subtle{ border-color:var(--line); color:var(--ink-soft); }
.btn.subtle:hover{ background:var(--line); color:var(--ink); }
.btn[disabled]{ opacity:.5; cursor:not-allowed; }

main{ max-width:1080px; margin:0 auto; padding:24px 32px 80px; }

/* ---------- Auth view ---------- */
.auth-wrap{ display:flex; justify-content:center; padding-top:6vh; }
.auth-card{
  background:var(--card); border:1px solid var(--line);
  width:100%; max-width:380px; padding:36px 32px;
  border-radius:4px; position:relative;
  box-shadow:0 10px 30px rgba(32,32,29,0.06);
}
.auth-card h2{ margin:0 0 4px; font-size:24px; }
.auth-card p.eyebrow{ margin:0 0 24px; color:var(--ink-soft); font-size:13px; letter-spacing:.04em;}
label{ display:block; font-size:13px; color:var(--ink-soft); margin:14px 0 6px; }
input[type=text],input[type=password],input[type=file]{
  width:100%; padding:10px 12px; border:1px solid var(--line); border-radius:3px;
  font-size:14px; background:#FFFFFF; color:var(--ink);
}
input:focus{ outline:2px solid var(--jade); outline-offset:1px; border-color:var(--jade); }
.auth-actions{ margin-top:22px; display:flex; flex-direction:column; gap:10px; }
.switch-link{ text-align:center; font-size:13px; margin-top:16px; color:var(--ink-soft); }
.switch-link button{ background:none;border:none;color:var(--seal);font-weight:600;text-decoration:underline;padding:0;}
.form-msg{ font-size:13px; margin-top:10px; min-height:16px; }
.form-msg.error{ color:var(--danger); }
.form-msg.ok{ color:var(--jade); }

/* ---------- Dashboard ---------- */
.toolbar{ display:flex; align-items:center; justify-content:space-between; margin:8px 0 20px; flex-wrap:wrap; gap:12px;}
.toolbar h1{ font-size:20px; margin:0; }
.upload-zone{
  border:1.5px dashed var(--line); border-radius:4px; padding:26px;
  text-align:center; color:var(--ink-soft); font-size:14px; margin-bottom:24px;
  background:rgba(255,253,248,0.6);
}
.upload-zone.drag{ border-color:var(--jade); color:var(--jade); background:rgba(47,111,94,0.05); }
#file-input{ display:none; }

.grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:16px; }
.file-card{
  background:var(--card); border:1px solid var(--line); border-radius:4px; overflow:hidden;
  display:flex; flex-direction:column;
}
.file-preview{
  height:140px; background:#EFEAE0; display:flex; align-items:center; justify-content:center; overflow:hidden;
}
.file-preview img,.file-preview video{ width:100%; height:100%; object-fit:cover; }
.file-preview .icon{ font-size:34px; color:var(--ink-soft); }
.file-body{ padding:12px 14px; display:flex; flex-direction:column; gap:6px; flex:1; }
.file-name{ font-size:14px; font-weight:600; word-break:break-all; }
.file-meta{ font-size:12px; color:var(--ink-soft); }
.file-actions{ display:flex; gap:8px; margin-top:auto; padding-top:8px; flex-wrap:wrap; }
.file-actions .btn{ padding:5px 10px; font-size:12px; }
audio{ width:90%; }

.empty{ text-align:center; padding:60px 20px; color:var(--ink-soft); }
.empty .icon{ font-size:40px; display:block; margin-bottom:10px; }

/* ---------- Modal ---------- */
.modal-backdrop{
  position:fixed; inset:0; background:rgba(32,32,29,0.4); display:flex;
  align-items:center; justify-content:center; z-index:50; padding:20px;
}
.modal{
  background:var(--card); border-radius:4px; max-width:440px; width:100%;
  padding:26px; border:1px solid var(--line);
}
.modal h3{ margin:0 0 8px; font-size:17px; }
.modal .share-link{
  display:flex; gap:8px; margin:16px 0;
}
.modal .share-link input{ flex:1; font-size:12px; }
.modal-close{ text-align:right; margin-top:16px; }

.toast{
  position:fixed; bottom:24px; left:50%; transform:translateX(-50%);
  background:var(--ink); color:var(--paper); padding:10px 18px; border-radius:3px;
  font-size:13px; z-index:80; opacity:0; pointer-events:none; transition:opacity .2s ease;
}
.toast.show{ opacity:1; }

.hint{ font-size:12px; color:var(--ink-soft); margin-top:6px; }

/* ---------- Shared view ---------- */
.shared-card{
  max-width:520px; margin:8vh auto 0; background:var(--card); border:1px solid var(--line);
  border-radius:4px; padding:30px; text-align:center;
}
.shared-card .file-preview{ height:260px; margin-bottom:18px; border-radius:3px; }

@media (max-width:600px){
  header.top, main{ padding-left:16px; padding-right:16px; }
}