/* 码父分享 — modern glass UI, indigo/violet brand */
:root {
  --bg0: #f4f5fb;
  --bg1: #ebe9fe;
  --bg2: #e0e7ff;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #ffffff;
  --surface-soft: rgba(99, 102, 241, 0.06);
  --border: rgba(99, 102, 241, 0.14);
  --border-strong: rgba(99, 102, 241, 0.28);
  --text: #0f172a;
  --text-secondary: #334155;
  --muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-soft: rgba(99, 102, 241, 0.12);
  --accent-glow: rgba(99, 102, 241, 0.35);
  --violet: #8b5cf6;
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.1);
  --ok: #10b981;
  --ok-soft: rgba(16, 185, 129, 0.12);
  --shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.06),
    0 12px 28px -8px rgba(99, 102, 241, 0.18);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05),
    0 4px 12px rgba(99, 102, 241, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 10px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --top-h: 3.5rem;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg0: #0b0f1a;
    --bg1: #12162a;
    --bg2: #1a1440;
    --surface: rgba(22, 27, 46, 0.78);
    --surface-solid: #161b2e;
    --surface-soft: rgba(99, 102, 241, 0.1);
    --border: rgba(148, 163, 184, 0.14);
    --border-strong: rgba(129, 140, 248, 0.35);
    --text: #f1f5f9;
    --text-secondary: #cbd5e1;
    --muted: #94a3b8;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-soft: rgba(129, 140, 248, 0.16);
    --accent-glow: rgba(99, 102, 241, 0.45);
    --violet: #a78bfa;
    --danger: #f87171;
    --danger-soft: rgba(248, 113, 113, 0.12);
    --ok: #34d399;
    --ok-soft: rgba(52, 211, 153, 0.14);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.45),
      0 0 0 1px rgba(129, 140, 248, 0.06);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  color: var(--text);
  line-height: 1.55;
  background:
    radial-gradient(1200px 600px at 10% -10%, var(--bg2), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(139, 92, 246, 0.22), transparent 50%),
    radial-gradient(700px 400px at 50% 100%, rgba(99, 102, 241, 0.12), transparent 55%),
    linear-gradient(165deg, var(--bg0), var(--bg1));
  background-attachment: fixed;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover {
  color: var(--accent-hover);
}

/* —— Header —— */
.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  min-height: var(--top-h);
  padding: 0.65rem 1.15rem;
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.brand::before {
  content: "";
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--violet));
  box-shadow: 0 2px 8px var(--accent-glow);
  flex-shrink: 0;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem 0.5rem;
  flex-wrap: wrap;
  font-size: 0.82rem;
}

.guest-badge {
  color: var(--muted);
  font-size: 0.75rem;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
}


.user-chip[hidden],
.guest-badge[hidden],
.btn-text[hidden],
.top-actions [hidden] {
  display: none !important;
}

.user-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.points-pill {
  background: linear-gradient(135deg, var(--accent-soft), rgba(139, 92, 246, 0.14));
  color: var(--accent);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-weight: 700;
  font-size: 0.78rem;
}

.btn-text {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.82rem;
  padding: 0.35rem 0.55rem;
  font-weight: 600;
  border-radius: 8px;
  font-family: inherit;
  transition: background 0.15s, color 0.15s;
}
.btn-text:hover {
  background: var(--accent-soft);
}
.btn-text:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* —— Main —— */
.main {
  padding: 1.75rem 1.15rem 3.5rem;
  max-width: 560px;
  margin: 0 auto;
}
.main.narrow {
  max-width: 500px;
}

.hero {
  margin-bottom: 1.35rem;
}

h1 {
  font-size: clamp(1.45rem, 4vw, 1.75rem);
  margin: 0 0 0.45rem;
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.25;
  background: linear-gradient(120deg, var(--text) 30%, var(--accent) 120%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
@media (prefers-color-scheme: dark) {
  h1 {
    background: linear-gradient(120deg, #f8fafc 20%, var(--accent) 130%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.lead {
  color: var(--muted);
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.6;
}

/* —— Cards —— */
.card {
  background: var(--surface);
  backdrop-filter: blur(18px) saturate(1.15);
  -webkit-backdrop-filter: blur(18px) saturate(1.15);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.field {
  margin-bottom: 1.1rem;
}
.field:last-of-type {
  margin-bottom: 0.85rem;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.4rem;
  letter-spacing: 0.01em;
}

input[type="text"],
input[type="password"],
select {
  width: 100%;
  padding: 0.72rem 0.9rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: var(--surface-solid);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  margin-bottom: 0;
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5 6 6.5 11 1.5' stroke='%236366f1' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.2rem;
}
input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.drop {
  display: block;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 2.1rem 1.15rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.15s, box-shadow 0.2s;
  margin-bottom: 1.15rem;
  background: var(--surface-soft);
}
.drop:hover,
.drop.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.drop.dragover {
  transform: scale(1.01);
}
.drop input {
  display: none;
}
#drop-label {
  display: block;
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--text);
}
.drop .muted {
  margin: 0.45rem 0 0;
}

.file-name {
  font-weight: 650;
  word-break: break-all;
  color: var(--text);
}

.muted {
  color: var(--muted);
  font-size: 0.88rem;
}

.cost-hint {
  margin: 0.45rem 0 0;
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 550;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  width: 100%;
  padding: 0.8rem 1.1rem;
  border: none;
  border-radius: var(--radius-xs);
  font-size: 0.98rem;
  font-weight: 650;
  font-family: inherit;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--violet));
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow);
  transition: transform 0.12s, box-shadow 0.15s, filter 0.15s, opacity 0.15s;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover:not(:disabled) {
  filter: brightness(1.05);
  box-shadow: 0 6px 20px var(--accent-glow);
}
.btn:active:not(:disabled) {
  transform: scale(0.985);
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}
.btn.secondary {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  filter: none;
}
.btn.secondary:hover:not(:disabled) {
  border-color: var(--border-strong);
  color: var(--text);
  filter: none;
  background: var(--surface-soft);
}

.progress-wrap {
  height: 7px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin: 0.85rem 0 1.1rem;
  display: none;
}
.progress-wrap.active {
  display: block;
}
.progress-bar {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--violet));
  transition: width 0.15s;
}

.error {
  color: var(--danger);
  font-size: 0.88rem;
  margin-top: 0.65rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-xs);
  background: var(--danger-soft);
}

/* —— Success / share —— */
.success-qr {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 1rem;
  text-align: center;
}
.success-head {
  text-align: center;
  padding-bottom: 0.25rem;
}
.success-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ok);
  background: var(--ok-soft);
  border: 1px solid color-mix(in srgb, var(--ok) 35%, transparent);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  margin-bottom: 0.65rem;
}
.share-hint {
  margin: 0.35rem 0 0;
}

.share-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
  width: 100%;
}
@media (min-width: 520px) {
  .share-grid {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }
}

.share-block {
  width: 100%;
  text-align: left;
  margin: 0;
  padding: 1rem 1rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-soft);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  box-shadow: var(--shadow-sm);
}
.share-title {
  font-size: 0.88rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.share-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 8px;
  font-size: 0.72rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--violet));
  flex-shrink: 0;
}

.share-url-text {
  word-break: break-all;
  font-size: 0.86rem;
  line-height: 1.5;
  margin: 0 0 0.75rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-xs);
  background: var(--surface-solid);
  border: 1px dashed var(--border-strong);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  flex: 1;
}

.link-row {
  display: flex;
  gap: 0.5rem;
  width: 100%;
  margin-bottom: 0.5rem;
}
.link-row input {
  margin-bottom: 0;
  flex: 1;
  font-size: 0.8rem;
  min-width: 0;
}
.link-row .btn {
  width: auto;
  flex-shrink: 0;
  padding: 0.65rem 0.9rem;
  font-size: 0.88rem;
}

.share-block #qrcode,
.qr-box {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0.15rem auto 0.85rem;
  min-height: 200px;
}
.qr-box img,
.qr-box canvas,
.success-qr canvas,
.success-qr img {
  width: min(220px, 72vw);
  height: auto;
  aspect-ratio: 1;
  border-radius: 14px;
  background: #fff;
  padding: 10px;
  box-shadow: var(--shadow-sm);
}

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: auto;
}
.btn-row .btn {
  width: 100%;
  margin-top: 0;
  font-size: 0.84rem;
  padding: 0.65rem 0.5rem;
}
@media (max-width: 420px) {
  .btn-row {
    grid-template-columns: 1fr;
  }
}

.meta-line {
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0.25rem 0 0;
  text-align: center;
}

.again-wrap {
  margin-top: 0.25rem;
}

/* —— Preview / share page —— */
.preview-box {
  margin: 1rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: #0f172a;
  max-height: 50vh;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.preview-box img,
.preview-box video,
.preview-box audio {
  display: block;
  max-width: 100%;
  margin: 0 auto;
}
.preview-box iframe {
  width: 100%;
  min-height: 60vh;
  border: none;
}

.wechat-hint {
  background: var(--danger-soft);
  border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
  border-radius: var(--radius-xs);
  padding: 0.75rem 1rem;
  font-size: 0.88rem;
  margin: 1rem 0;
  display: none;
  color: var(--text-secondary);
}
.wechat-hint.show {
  display: block;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-top: 1.15rem;
}
@media (min-width: 480px) {
  .actions.row {
    flex-direction: row;
  }
  .actions.row .btn {
    flex: 1;
  }
}

/* —— Modal —— */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal[hidden] {
  display: none !important;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.modal-card {
  position: relative;
  width: 100%;
  max-width: 400px;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  z-index: 1;
  box-shadow: var(--shadow);
}
.modal-card h2 {
  margin: 0 0 0.85rem;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}
.tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 1.05rem;
  padding: 0.25rem;
  background: var(--surface-soft);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.tab {
  flex: 1;
  padding: 0.5rem;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 9px;
  cursor: pointer;
  font-weight: 650;
  font-family: inherit;
  font-size: 0.9rem;
  transition: background 0.15s, color 0.15s;
}
.tab.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--violet));
  box-shadow: 0 2px 8px var(--accent-glow);
}
.modal-card label {
  margin-top: 0.15rem;
}
.modal-card input {
  margin-bottom: 0.85rem;
}
.modal-close {
  margin-top: 0.75rem;
}

.wechat-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 1.1rem 0;
  flex-wrap: wrap;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--ok-soft);
  border: 1px solid color-mix(in srgb, var(--ok) 30%, transparent);
}
.wechat-row code {
  font-size: 1.15rem;
  font-weight: 750;
  color: var(--ok);
  letter-spacing: 0.02em;
}
.wechat-row .btn {
  width: auto;
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
  margin-left: auto;
}

/* —— Safe area / WeChat H5 —— */
@supports (padding: max(0px)) {
  .top {
    padding-left: max(1.15rem, env(safe-area-inset-left));
    padding-right: max(1.15rem, env(safe-area-inset-right));
  }
  .main {
    padding-bottom: max(3.5rem, calc(2rem + env(safe-area-inset-bottom)));
  }
}