/* ===== 变量 (from variables.css) ===== */
:root {
  --background: #070b11;
  --foreground: #edf4ff;
  --body-overlay-primary: radial-gradient(circle at top left, rgba(93, 196, 255, 0.1), transparent 24%);
  --body-overlay-secondary: radial-gradient(circle at 78% 12%, rgba(163, 230, 53, 0.08), transparent 18%);
  --body-overlay-tertiary: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
  --selection-bg: rgba(113, 198, 255, 0.28);
  --selection-text: #f8fbff;
  --scrollbar-thumb: rgba(255, 255, 255, 0.14);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.22);
  --select-option-bg: #111821;
  --select-option-text: #edf4ff;
  --bg-layer-opacity: 0.07;
  --bg-layer-filter: saturate(0.72) brightness(0.48) contrast(1.06);
  --ui-shell: rgba(9, 13, 22, 0.9);
  --ui-shell-strong: rgba(8, 12, 20, 0.92);
  --ui-panel: rgba(15, 20, 28, 0.9);
  --ui-panel-alt: rgba(17, 22, 31, 0.92);
  --ui-panel-strong: #0f1726;
  --ui-panel-contrast: #111a29;
  --ui-panel-table: rgba(11, 18, 29, 0.92);
  --ui-panel-header: rgba(13, 23, 36, 0.95);
  --ui-soft: rgba(255, 255, 255, 0.04);
  --ui-soft-hover: rgba(255, 255, 255, 0.07);
  --ui-border: rgba(255, 255, 255, 0.1);
  --ui-border-subtle: rgba(255, 255, 255, 0.08);
  --ui-border-strong: rgba(255, 255, 255, 0.14);
  --ui-text-primary: #ffffff;
  --ui-text-secondary: rgba(255, 255, 255, 0.78);
  --ui-text-muted: rgba(255, 255, 255, 0.62);
  --ui-text-faint: rgba(255, 255, 255, 0.42);
  --ui-text-dim: #8b9ab0;
  --ui-shadow-xl: 0 28px 90px rgba(0, 0, 0, 0.18);
  --ui-info-bg: rgba(34, 211, 238, 0.12);
  --ui-info-hover: rgba(34, 211, 238, 0.18);
  --ui-info-border: rgba(34, 211, 238, 0.26);
  --ui-info-text: #d8f9ff;
  --ui-success-bg: rgba(52, 211, 153, 0.12);
  --ui-success-hover: rgba(52, 211, 153, 0.18);
  --ui-success-border: rgba(52, 211, 153, 0.24);
  --ui-success-text: #d6ffef;
  --ui-danger-bg: rgba(251, 113, 133, 0.12);
  --ui-danger-hover: rgba(251, 113, 133, 0.18);
  --ui-danger-border: rgba(251, 113, 133, 0.24);
  --ui-danger-text: #ffd3db;
  --ui-warning-bg: rgba(245, 158, 11, 0.12);
  --ui-warning-hover: rgba(245, 158, 11, 0.18);
  --ui-warning-border: rgba(245, 158, 11, 0.24);
  --ui-warning-text: #ffe1a8;
  --ui-accent-character-bg: rgba(217, 70, 239, 0.12);
  --ui-accent-character-border: rgba(217, 70, 239, 0.24);
  --ui-accent-character-text: #f5d0fe;
  --ui-accent-scene-bg: rgba(34, 211, 238, 0.12);
  --ui-accent-scene-border: rgba(34, 211, 238, 0.24);
  --ui-accent-scene-text: #d8f9ff;
  --ui-accent-prop-bg: rgba(245, 158, 11, 0.12);
  --ui-accent-prop-border: rgba(245, 158, 11, 0.24);
  --ui-accent-prop-text: #ffe1a8;
  --ui-overlay-strong: rgba(6, 17, 29, 0.86);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei UI", "Segoe UI", sans-serif;
  --font-display: "Bahnschrift", "Aptos Display", "Noto Sans SC", "PingFang SC", "Microsoft YaHei UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", ui-monospace, monospace;
}

:root[data-appearance="light"] {
  --background: #f4f7fb;
  --foreground: #152033;
  --body-overlay-primary: radial-gradient(circle at top left, rgba(93, 196, 255, 0.14), transparent 26%);
  --body-overlay-secondary: radial-gradient(circle at 78% 12%, rgba(163, 230, 53, 0.07), transparent 20%);
  --body-overlay-tertiary: linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.1));
  --selection-bg: rgba(56, 189, 248, 0.22);
  --selection-text: #10213a;
  --scrollbar-thumb: rgba(21, 32, 51, 0.18);
  --scrollbar-thumb-hover: rgba(21, 32, 51, 0.28);
  --select-option-bg: #f8fbff;
  --select-option-text: #152033;
  --bg-layer-opacity: 0.035;
  --bg-layer-filter: saturate(0.84) brightness(1.16) contrast(0.92);
  --ui-shell: rgba(255, 255, 255, 0.78);
  --ui-shell-strong: rgba(255, 255, 255, 0.9);
  --ui-panel: rgba(255, 255, 255, 0.9);
  --ui-panel-alt: rgba(248, 250, 253, 0.96);
  --ui-panel-strong: #ffffff;
  --ui-panel-contrast: #f7faff;
  --ui-panel-table: rgba(255, 255, 255, 0.94);
  --ui-panel-header: rgba(242, 247, 252, 0.96);
  --ui-soft: rgba(21, 32, 51, 0.04);
  --ui-soft-hover: rgba(21, 32, 51, 0.07);
  --ui-border: rgba(21, 32, 51, 0.1);
  --ui-border-subtle: rgba(21, 32, 51, 0.08);
  --ui-border-strong: rgba(21, 32, 51, 0.14);
  --ui-text-primary: #122033;
  --ui-text-secondary: rgba(18, 32, 51, 0.8);
  --ui-text-muted: rgba(18, 32, 51, 0.64);
  --ui-text-faint: rgba(18, 32, 51, 0.44);
  --ui-text-dim: #6c7c92;
  --ui-shadow-xl: 0 28px 90px rgba(39, 69, 122, 0.08);
  --ui-info-bg: rgba(8, 145, 178, 0.08);
  --ui-info-hover: rgba(8, 145, 178, 0.13);
  --ui-info-border: rgba(8, 145, 178, 0.18);
  --ui-info-text: #0f6178;
  --ui-success-bg: rgba(5, 150, 105, 0.09);
  --ui-success-hover: rgba(5, 150, 105, 0.13);
  --ui-success-border: rgba(5, 150, 105, 0.17);
  --ui-success-text: #15684d;
  --ui-danger-bg: rgba(225, 29, 72, 0.08);
  --ui-danger-hover: rgba(225, 29, 72, 0.12);
  --ui-danger-border: rgba(225, 29, 72, 0.16);
  --ui-danger-text: #8c2842;
  --ui-warning-bg: rgba(217, 119, 6, 0.09);
  --ui-warning-hover: rgba(217, 119, 6, 0.14);
  --ui-warning-border: rgba(217, 119, 6, 0.18);
  --ui-warning-text: #905b12;
  --ui-accent-character-bg: rgba(217, 70, 239, 0.1);
  --ui-accent-character-border: rgba(192, 38, 211, 0.2);
  --ui-accent-character-text: #8b267f;
  --ui-accent-scene-bg: rgba(8, 145, 178, 0.08);
  --ui-accent-scene-border: rgba(8, 145, 178, 0.18);
  --ui-accent-scene-text: #0f6178;
  --ui-accent-prop-bg: rgba(217, 119, 6, 0.1);
  --ui-accent-prop-border: rgba(217, 119, 6, 0.18);
  --ui-accent-prop-text: #905b12;
  --ui-overlay-strong: rgba(244, 248, 252, 0.92);
}

/* ===== 基础重置 (from base.css) ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root[data-appearance="dark"] {
  color-scheme: dark;
}

:root[data-appearance="light"] {
  color-scheme: light;
}

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

body {
  background: var(--body-overlay-primary), var(--body-overlay-secondary), var(--body-overlay-tertiary), var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  letter-spacing: 0.01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: url("../img/bg.jpg") center center / cover no-repeat;
  opacity: var(--bg-layer-opacity);
  filter: var(--bg-layer-filter);
  pointer-events: none;
}

body > *:not(.bg-layer) {
  position: relative;
  z-index: 1;
}

::selection {
  background: var(--selection-bg);
  color: var(--selection-text);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* ===== 登录/注册页面 (from login.css) ===== */
.login-page {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden;
  padding: 1.5rem;
}

.login-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.login-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top, #15263b 0%, transparent 46%),
    linear-gradient(180deg, #061018 0%, #09131d 100%);
}

.login-bg-glow {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 34vw;
  background: radial-gradient(circle at center, rgba(125, 211, 252, 0.12), transparent 62%);
}

.login-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1120px;
}

.login-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .login-grid {
    grid-template-columns: minmax(0, 1.1fr) 480px;
  }
}

.login-brand-panel {
  border-radius: 40px;
  border: 1px solid var(--ui-border-subtle);
  background: var(--ui-panel-alt);
  padding: 2.5rem 2rem;
}

.login-brand-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: #8cc7ff;
}

.login-brand-title {
  margin-top: 1.25rem;
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.06em;
  color: var(--ui-text-primary);
}

.login-brand-desc {
  margin-top: 1.25rem;
  max-width: 560px;
  font-size: 1rem;
  line-height: 2;
  color: var(--ui-text-muted);
}

.login-brand-features {
  margin-top: 2rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 640px) {
  .login-brand-features {
    grid-template-columns: 1fr;
  }
}

.login-feature-card {
  border-radius: 24px;
  border: 1px solid var(--ui-border);
  background: var(--ui-panel-contrast);
  padding: 1rem;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--ui-text-secondary);
}

.login-form-panel {
  width: 100%;
  max-width: 480px;
  border-radius: 36px;
  border: 1px solid var(--ui-border-subtle);
  background: var(--ui-panel);
  padding: 2.25rem 2rem;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.12);
}

.login-form-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: #8cc7ff;
}

.login-form-title {
  margin-top: 1rem;
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--ui-text-primary);
}

.login-form-desc {
  margin-top: 1rem;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--ui-text-muted);
}

.login-mode-switch {
  margin-top: 1.75rem;
  display: flex;
  overflow: hidden;
  border-radius: 1rem;
  border: 1px solid var(--ui-border);
  background: var(--ui-panel-contrast);
}

.login-mode-btn {
  flex: 1;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  background: transparent;
  color: var(--ui-text-secondary);
  font-family: inherit;
}

.login-mode-btn:hover {
  background: var(--ui-soft-hover);
}

.login-mode-btn.active {
  background: #22d3ee;
  color: #0f172a;
}

.login-form {
  margin-top: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.login-field {
  display: block;
}

.login-field-label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ui-text-dim);
}

.login-field-input {
  width: 100%;
  border-radius: 1rem;
  border: 1px solid var(--ui-border);
  background: var(--ui-panel-contrast);
  color: var(--ui-text-primary);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

.login-field-input::placeholder {
  color: var(--ui-text-faint);
}

.login-field-input:focus {
  border-color: var(--ui-info-border);
}

.login-field-input.uppercase {
  text-transform: uppercase;
}

.login-error {
  border-radius: 22px;
  border: 1px solid var(--ui-danger-border);
  background: var(--ui-danger-bg);
  color: var(--ui-danger-text);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
}

.login-submit {
  width: 100%;
  border-radius: 1rem;
  background: linear-gradient(135deg, #85f5db 0%, #78b8ff 52%, #a3e635 100%);
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #05131b;
  border: none;
  cursor: pointer;
  transition: transform 0.15s;
  font-family: inherit;
}

.login-submit:hover:not(:disabled) {
  transform: translateY(-2px);
}

.login-submit:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

/* ===== 版权 ===== */
.reg-copyright {
  position: fixed;
  width: 100%;
  left: 0;
  bottom: 10px;
  text-align: center;
  color: var(--ui-text-faint);
  font-size: 12px;
  z-index: 1;
}

.reg-copyright a {
  color: var(--ui-text-faint);
  text-decoration: none;
}

.reg-copyright a:hover {
  color: var(--ui-text-dim);
}