:root {
  --ink: #2c3a47;
  --muted: #766f69;
  --quiet: #6f6862;
  --paper: #fffefd;
  --panel: #ffffff;
  --line: #f0e3e8;
  --accent: #ff4d86;
  --accent-light: #ffa8c6;
  --gold: #f6c445;
  --accent-soft: #fff0f5;
  --accent-dark: #7f3f56;
  --brown: #80615d;
  --olive: #557146;
  --warm: #f7f1ea;
  --shadow: 0 16px 42px rgba(102, 54, 74, .08);
  --display: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { min-height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.landing-page {
  min-height: 100vh; display: flex; flex-direction: column;
  background:
    radial-gradient(circle at 18% 2%, rgba(255, 168, 198, .09), transparent 34rem),
    radial-gradient(circle at 82% 8%, rgba(246, 196, 69, .035), transparent 24rem),
    var(--paper);
}
.landing-nav {
  width: min(1180px, calc(100% - 64px)); min-height: 82px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.landing-brand {
  display: flex; align-items: center; gap: 11px; color: inherit;
  text-decoration: none; font-family: var(--display);
  font-size: 17px; font-weight: 750; letter-spacing: .01em;
}
.landing-actions { display: flex; align-items: center; gap: 18px; }
.landing-actions a, .text-button {
  color: var(--muted); text-decoration: none; border: 0; background: none; cursor: pointer;
}
.landing-actions button {
  border: 1px solid var(--accent-light); border-radius: 999px; padding: 9px 17px;
  cursor: pointer; color: var(--accent-dark); background: rgba(255,255,255,.72);
}
.primary-button {
  border: 0; border-radius: 999px; padding: 10px 18px; cursor: pointer;
  color: #fff; background: var(--accent);
}
.landing-main { flex: 1; min-height: 0; display: grid; place-items: center; padding: 24px 24px 54px; }
.landing-hero { width: min(790px, 100%); margin-top: -5vh; text-align: center; }
.landing-hero h1 {
  margin: 0; font-family: var(--display); font-size: clamp(52px, 6.3vw, 76px);
  font-weight: 750; line-height: 1.12; letter-spacing: -.045em;
}
.title-rose { color: #a85773; }
.title-brown { color: var(--brown); }
.title-olive { color: var(--olive); }
.hero-subtitle {
  margin: 15px 0 31px; color: var(--muted); font-size: clamp(15px, 1.8vw, 17px);
  letter-spacing: .01em;
}
.landing-composer {
  padding: 19px 20px 14px; text-align: left; background: var(--panel);
  border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow);
}
.landing-composer textarea {
  width: 100%; min-height: 76px; resize: vertical; border: 0; outline: 0;
  color: var(--ink); background: transparent; font-size: 16px; line-height: 1.65;
}
.landing-composer textarea::placeholder { color: #a59c94; }
.composer-tools { display: flex; align-items: center; gap: 10px; }
.attach-button {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center;
  border: 1px solid #f2cddd; cursor: pointer; font-size: 21px; color: var(--accent);
  background: #fff; line-height: 1;
}
.file-name { color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.composer-tools .primary-button {
  margin-left: auto; padding-inline: 23px; font-weight: 650;
  letter-spacing: .02em; box-shadow: 0 5px 14px rgba(255, 77, 134, .18);
}
.prompt-suggestions { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-top: 17px; }
.prompt-suggestions button {
  display: inline-flex; align-items: center; gap: 7px;
  border: 1px solid var(--line); background: rgba(255,254,251,.72); color: var(--muted);
  border-radius: 999px; padding: 8px 14px; cursor: pointer;
}
.prompt-suggestions button:hover, .prompt-suggestions button:focus-visible { color: var(--accent); border-color: var(--accent-light); background: var(--accent-soft); }
.suggestion-icon {
  width: 15px; height: 15px; flex: none; background: var(--accent);
  mask-position: center; mask-repeat: no-repeat; mask-size: contain;
  -webkit-mask-position: center; -webkit-mask-repeat: no-repeat; -webkit-mask-size: contain;
}
.suggestion-review {
  mask-image: url("/static/icons/review.svg");
  -webkit-mask-image: url("/static/icons/review.svg");
}
.suggestion-edit {
  mask-image: url("/static/icons/edit.svg");
  -webkit-mask-image: url("/static/icons/edit.svg");
}
.suggestion-qc {
  mask-image: url("/static/icons/qc.svg");
  -webkit-mask-image: url("/static/icons/qc.svg");
}
.privacy-note { color: var(--quiet); font-size: 12px; margin-top: 25px; letter-spacing: .015em; }
.privacy-note a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--line); }
.landing-footer {
  flex: none; display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: 7px; padding: 13px 24px 20px;
  color: var(--quiet); font-size: 12px; letter-spacing: .01em;
}
.landing-footer a { color: var(--quiet); text-decoration: none; }
.landing-footer a:hover, .landing-footer a:focus-visible { color: var(--accent-dark); }
.auth-dialog {
  width: min(440px, calc(100vw - 32px)); border: 0; border-radius: 22px;
  padding: 0; max-height: calc(100vh - 32px); overflow-y: auto;
  overscroll-behavior: contain; box-shadow: 0 30px 90px rgba(35, 25, 20, .28);
}
.auth-dialog { max-height: calc(100dvh - 32px); }
.auth-dialog::backdrop { background: rgba(34, 27, 23, .34); backdrop-filter: blur(4px); }
.dialog-head { display: flex; justify-content: space-between; align-items: center; padding: 22px 24px 8px; }
.dialog-head h2 { margin: 0; font-size: 22px; }
.icon-button { border: 0; background: transparent; cursor: pointer; font-size: 26px; color: var(--muted); }
.draft-preview { margin: 0 24px 12px; padding: 12px; border-radius: 12px; background: var(--warm); color: var(--muted); }
.auth-tabs { margin: 8px 24px 16px; display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--line); }
.auth-tabs button { padding: 12px; border: 0; background: none; color: var(--muted); cursor: pointer; }
.auth-tabs button.active { color: var(--accent); border-bottom: 2px solid var(--accent); }
.auth-form { padding: 0 24px 16px; display: grid; gap: 12px; }
.auth-form label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
.auth-form input {
  width: 100%; padding: 12px 13px; border: 1px solid var(--line); border-radius: 11px;
  outline: none; color: var(--ink); background: #fff;
}
.auth-form input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(200,79,104,.1); }
.auth-form .primary-button { margin-top: 6px; padding: 12px; background: var(--accent); }
.friend-reminder {
  padding: 12px; border: 1px solid var(--line); border-radius: 12px;
  background: var(--warm);
}
.friend-reminder-check {
  display: flex; align-items: flex-start; gap: 8px; color: var(--ink);
  cursor: pointer;
}
.friend-reminder-check input {
  width: 16px; height: 16px; flex: none; margin: 2px 0 0;
  padding: 0; accent-color: var(--accent);
}
.friend-reminder-copy { color: var(--quiet); font-size: 12px; line-height: 1.68; }
.form-hint { color: var(--muted); font-size: 12px; line-height: 1.55; margin: 2px 0; }
.form-message { min-height: 20px; margin: 0 24px 8px; color: var(--accent-dark); font-size: 13px; }
.dialog-head + .auth-tabs + .auth-form + .auth-form + .form-message + .text-button { margin: 0 24px 22px; }
.auth-page { min-height: 100vh; display: grid; place-items: center; background: var(--warm); }
.auth-card { width: min(440px, calc(100vw - 32px)); padding: 28px; background: white; border-radius: 22px; box-shadow: var(--shadow); }
.auth-card h1 { margin-top: 0; }
.drop-hint {
  position: fixed; inset: 0; display: none; place-items: center; pointer-events: none;
  background: rgba(246,238,229,.88); color: var(--accent); font-size: 24px; font-weight: 700;
}
body.dragging .drop-hint { display: grid; }
@media (max-width: 640px) {
  .landing-nav { width: calc(100% - 36px); min-height: 68px; }
  .landing-actions a { display: none; }
  .landing-brand { font-size: 16px; }
  .landing-main { min-height: 0; padding: 16px; align-items: start; padding-top: 9vh; }
  .landing-hero { margin: 0; }
  .landing-hero h1 { font-size: clamp(42px, 13vw, 56px); }
  .hero-subtitle { margin: 13px 0 24px; }
  .landing-composer { padding: 16px 15px 12px; border-radius: 17px; }
  .prompt-suggestions { gap: 7px; }
  .prompt-suggestions button { padding: 7px 11px; }
}