:root {
  --bg: #0f1220;
  --bg-soft: #161a2e;
  --card: #1c2138;
  --card-soft: #232947;
  --border: #2d3560;
  --text: #eaeefb;
  --text-dim: #9aa3c7;
  --primary: #5b8cff;
  --primary-strong: #3f6ff0;
  --danger: #ff6b7a;
  --ok: #4cd6a0;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: linear-gradient(160deg, var(--bg) 0%, #131733 55%, var(--bg-soft) 100%);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* ---- 背景装饰 ---- */
.bg-decor {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}

.orb-1 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, #3f6ff0, transparent 70%);
  top: -140px;
  right: -100px;
}

.orb-2 {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, #7a4ff0, transparent 70%);
  bottom: -120px;
  left: -100px;
  opacity: 0.35;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 20px 32px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- 头部 ---- */
.header {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-mark {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 1px;
  box-shadow: 0 8px 24px rgba(91, 140, 255, 0.4);
}

.logo h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.logo p {
  font-size: 13px;
  color: var(--text-dim);
}

/* ---- 卡片 ---- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-weight: 500;
}

.field input {
  width: 100%;
  padding: 13px 16px;
  font-size: 15px;
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input::placeholder {
  color: #5b6390;
}

.field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91, 140, 255, 0.2);
}

/* ---- 按钮 ---- */
.btn-primary {
  width: 100%;
  padding: 13px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(91, 140, 255, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-primary.small {
  width: auto;
  padding: 10px 22px;
  font-size: 14px;
  border-radius: 8px;
}

.btn-ghost {
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.btn-ghost:hover {
  color: var(--text);
  background: var(--card-soft);
  border-color: var(--primary);
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---- 错误提示 ---- */
.error-box {
  margin-top: 18px;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--danger);
  background: rgba(255, 107, 122, 0.1);
  border: 1px solid rgba(255, 107, 122, 0.35);
  border-radius: 10px;
}

/* ---- 结果 ---- */
.result {
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  animation: fadeUp 0.35s ease;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.file-info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.file-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--card-soft);
  display: grid;
  place-items: center;
  font-size: 20px;
}

.file-name {
  font-size: 15px;
  font-weight: 600;
  word-break: break-all;
}

.file-meta {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}

.badge {
  flex-shrink: 0;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--ok);
  background: rgba(76, 214, 160, 0.12);
  border: 1px solid rgba(76, 214, 160, 0.4);
  border-radius: 999px;
}

.url-box {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 16px;
}

.url-box code {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  word-break: break-all;
  white-space: pre-wrap;
  font-family: "SF Mono", "JetBrains Mono", Consolas, monospace;
  max-height: 90px;
  overflow-y: auto;
}

.actions {
  display: flex;
  gap: 10px;
}

/* ---- 页脚 ---- */
.footer {
  margin-top: auto;
  padding-top: 28px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  opacity: 0.8;
}

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 22px;
  font-size: 14px;
  color: #fff;
  background: var(--card-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  z-index: 99;
  animation: toastIn 0.25s ease;
}

.toast.ok {
  border-color: rgba(76, 214, 160, 0.5);
}

.toast.err {
  border-color: rgba(255, 107, 122, 0.5);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translate(-50%, 10px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 28px 14px 20px;
  }

  .card {
    padding: 20px;
  }

  .actions {
    flex-direction: column;
  }

  .btn-primary.small,
  .btn-ghost {
    width: 100%;
  }
}