/* ============================================
   项目库 · 基础样式（主题变量见 themes.css）
   ============================================ */

:root {
  /* 默认：夜幕主题 */
  --void: #05050b;
  --surface: #0b0b15;
  --surface-2: #10101d;
  --text: #eeecf9;
  --muted: #938fb0;
  --dim: #605d79;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.2);
  --blue: #4c6bff;
  --violet: #9a5cff;
  --pink: #ef5bff;
  --grad: linear-gradient(112deg, #4c6bff 0%, #9a5cff 54%, #ef5bff 100%);
  --on-accent: #ffffff;
  --glow-a: rgba(76, 107, 255, 0.55);
  --glow-b: rgba(154, 92, 255, 0.42);
  --grid: rgba(255, 255, 255, 0.045);
  --tint-1: rgba(255, 255, 255, 0.035);
  --tint-2: rgba(255, 255, 255, 0.012);
  --tint-3: rgba(255, 255, 255, 0.02);
  --head-bg: rgba(5, 5, 11, 0.55);
  --cover-a: rgba(76, 107, 255, 0.3);
  --cover-b: rgba(154, 92, 255, 0.18);
  --cover-c: rgba(239, 91, 255, 0.12);
  --cover-grid: rgba(255, 255, 255, 0.06);
  --initial: rgba(255, 255, 255, 0.22);
  --badge-bg: rgba(8, 8, 18, 0.72);
  --badge-line: rgba(154, 92, 255, 0.55);
  --badge-text: #d5c6ff;
  --chip-text: #c4b2ff;
  --chip-line: rgba(154, 92, 255, 0.45);
  --skel-a: rgba(255, 255, 255, 0.03);
  --skel-b: rgba(255, 255, 255, 0.07);
  --shadow: rgba(112, 96, 255, 0.9);
  --radius: 16px;
  --sans: var(--font-cjk);
  --mono: var(--font-mono);
}

/* ---------- 自选主题的正文字体 ----------
   预设主题的字体是写死的：纸页=文楷，夜幕/终端=黑体。
   只有「自选配色」主题允许换字体，data-font 也只在那个主题下生效，
   g/p/js/theme.js 会在切走时移除该属性。 */
html[data-theme="custom"][data-font="system"] {
  --sans: var(--font-cjk);
}

html[data-theme="custom"][data-font="kai"] {
  --sans: var(--font-kai);
}

html[data-theme="custom"][data-font="song"] {
  --sans: "Songti SC", "SimSun", "STSong", "Noto Serif CJK SC", serif;
}

html[data-theme="custom"][data-font="kaiti"] {
  --sans: "Kaiti SC", "KaiTi", "STKaiti", "LXGW WenKai", serif;
}

html[data-theme="custom"][data-font="mono"] {
  --sans: var(--font-mono);
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--void);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(154, 92, 255, 0.35);
  color: #fff;
}

/* ---------- 背景层 ---------- */

.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(
    ellipse 72% 62% at 50% 42%,
    #000 8%,
    transparent 72%
  );
  mask-image: radial-gradient(
    ellipse 72% 62% at 50% 42%,
    #000 8%,
    transparent 72%
  );
}

.bg-glow {
  position: absolute;
  width: 62vw;
  height: 62vw;
  min-width: 460px;
  min-height: 460px;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  will-change: transform;
}

.bg-glow--1 {
  top: -26vw;
  left: -14vw;
  background: radial-gradient(circle, var(--glow-a) 0%, transparent 66%);
  animation: drift-a 34s ease-in-out infinite alternate;
}

.bg-glow--2 {
  right: -18vw;
  bottom: -28vw;
  background: radial-gradient(circle, var(--glow-b) 0%, transparent 68%);
  animation: drift-b 42s ease-in-out infinite alternate;
}

@keyframes drift-a {
  to {
    transform: translate3d(9vw, 7vh, 0) scale(1.12);
  }
}

@keyframes drift-b {
  to {
    transform: translate3d(-8vw, -6vh, 0) scale(1.08);
  }
}

/* ---------- 布局工具 ---------- */

.page {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.wrap {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- 按钮 ---------- */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.3s ease,
    border-color 0.3s ease, background-color 0.3s ease;
}

.btn .arrow {
  width: 15px;
  height: 15px;
  flex: none;
  transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.btn:hover .arrow {
  transform: translateX(4px);
}

.btn-primary {
  color: var(--on-accent);
  background-image: var(--grad);
  background-size: 180% 100%;
  background-position: 0% 50%;
  box-shadow: 0 10px 32px -12px var(--shadow);
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    transparent 32%,
    rgba(255, 255, 255, 0.38) 50%,
    transparent 68%
  );
  transform: translateX(-120%);
  pointer-events: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  background-position: 100% 50%;
  box-shadow: 0 16px 40px -14px var(--shadow);
}

.btn-primary:hover::after {
  animation: sheen 0.9s ease;
}

@keyframes sheen {
  to {
    transform: translateX(120%);
  }
}

.btn-ghost {
  color: var(--text);
  background: var(--tint-3);
  border-color: var(--line);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: var(--tint-1);
}

/* ---------- 页脚 ---------- */

.site-foot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 32px 28px 34px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--dim);
}

.site-foot a:hover {
  color: var(--muted);
}

.foot-sep {
  color: var(--line-strong);
}

.foot-meta {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.admin-entry {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--dim);
  transition: color 0.25s ease;
}

.admin-entry svg {
  width: 12px;
  height: 12px;
}

.admin-entry:hover {
  color: var(--muted);
}

/* ---------- 无障碍：减少动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 640px) {
  .wrap {
    padding: 0 20px;
  }

  .site-foot {
    padding: 26px 20px 28px;
    flex-wrap: wrap;
  }
}

/* ============================================
   主题变量（并入基础样式，避免额外文件加载问题）
   ============================================ */

html[data-theme="night"] {
  color-scheme: dark;
}

html[data-theme="terminal"] {
  color-scheme: dark;
  --void: #040806;
  --surface: #08120f;
  --surface-2: #0b1a15;
  --text: #dcffe8;
  --muted: #7f9f8c;
  --dim: #4f6f5c;
  --line: rgba(120, 255, 170, 0.13);
  --line-strong: rgba(120, 255, 170, 0.32);
  --grad: linear-gradient(112deg, #39ff88 0%, #0ce0a0 54%, #b7ffd6 100%);
  --on-accent: #03130a;
  --glow-a: rgba(0, 255, 140, 0.22);
  --glow-b: rgba(0, 200, 140, 0.14);
  --grid: rgba(120, 255, 170, 0.05);
  --tint-1: rgba(120, 255, 170, 0.045);
  --tint-2: rgba(120, 255, 170, 0.012);
  --tint-3: rgba(120, 255, 170, 0.03);
  --head-bg: rgba(4, 8, 6, 0.6);
  --cover-a: rgba(0, 255, 140, 0.16);
  --cover-b: rgba(0, 220, 160, 0.1);
  --cover-c: rgba(180, 255, 220, 0.08);
  --cover-grid: rgba(120, 255, 170, 0.08);
  --initial: rgba(180, 255, 220, 0.25);
  --badge-bg: rgba(3, 10, 7, 0.8);
  --badge-line: rgba(120, 255, 170, 0.5);
  --badge-text: #a8ffc8;
  --chip-text: #9dffc4;
  --chip-line: rgba(120, 255, 170, 0.45);
  --skel-a: rgba(120, 255, 170, 0.04);
  --skel-b: rgba(120, 255, 170, 0.1);
  --shadow: rgba(0, 200, 130, 0.55);
  --violet: #39ff88;
}

html[data-theme="paper"] {
  color-scheme: light;
  --void: #f4f2ec;
  --surface: #fffdf8;
  --surface-2: #fffdf8;
  --text: #1a1712;
  --muted: #625c52;
  --dim: #969084;
  --line: rgba(26, 23, 18, 0.12);
  --line-strong: rgba(26, 23, 18, 0.3);
  --grad: linear-gradient(112deg, #1a1712 0%, #4a443a 54%, #7d7464 100%);
  --on-accent: #faf8f2;
  --glow-a: rgba(190, 168, 128, 0.2);
  --glow-b: rgba(150, 128, 96, 0.16);
  --grid: rgba(26, 23, 18, 0.05);
  --tint-1: rgba(26, 23, 18, 0.035);
  --tint-2: rgba(26, 23, 18, 0.012);
  --tint-3: rgba(26, 23, 18, 0.03);
  --head-bg: rgba(244, 242, 236, 0.74);
  --cover-a: rgba(26, 23, 18, 0.1);
  --cover-b: rgba(120, 110, 90, 0.08);
  --cover-c: rgba(200, 190, 170, 0.18);
  --cover-grid: rgba(26, 23, 18, 0.06);
  --initial: rgba(26, 23, 18, 0.22);
  --badge-bg: rgba(255, 253, 248, 0.85);
  --badge-line: rgba(26, 23, 18, 0.28);
  --badge-text: #2a251d;
  --chip-text: #4a443a;
  --chip-line: rgba(26, 23, 18, 0.28);
  --skel-a: rgba(26, 23, 18, 0.03);
  --skel-b: rgba(26, 23, 18, 0.08);
  --shadow: rgba(60, 50, 30, 0.28);
  --violet: #1a1712;
}

html[data-theme="paper"] ::selection {
  background: rgba(26, 23, 18, 0.85);
  color: #faf8f2;
}

html[data-theme="custom"] {
  color-scheme: dark;
  --accent: #7c8cff;
  --void: #08080c;
  --surface: #0c0c12;
  --surface-2: #101019;
  --text: #f2f1f7;
  --muted: #9a96ab;
  --dim: #625e73;
  --line: color-mix(in srgb, var(--accent) 22%, transparent);
  --line-strong: color-mix(in srgb, var(--accent) 52%, transparent);
  --grad: linear-gradient(
    112deg,
    var(--accent) 0%,
    color-mix(in srgb, var(--accent) 62%, #ffffff) 55%,
    color-mix(in srgb, var(--accent) 68%, #ff6bd6) 100%
  );
  --glow-a: color-mix(in srgb, var(--accent) 42%, transparent);
  --glow-b: color-mix(in srgb, var(--accent) 26%, transparent);
  --grid: color-mix(in srgb, var(--accent) 10%, transparent);
  --tint-1: rgba(255, 255, 255, 0.035);
  --tint-2: rgba(255, 255, 255, 0.012);
  --tint-3: rgba(255, 255, 255, 0.02);
  --head-bg: rgba(8, 8, 12, 0.55);
  --cover-a: color-mix(in srgb, var(--accent) 28%, transparent);
  --cover-b: color-mix(in srgb, var(--accent) 14%, transparent);
  --cover-c: rgba(255, 255, 255, 0.06);
  --cover-grid: rgba(255, 255, 255, 0.06);
  --initial: rgba(255, 255, 255, 0.22);
  --badge-bg: rgba(8, 8, 12, 0.72);
  --badge-line: color-mix(in srgb, var(--accent) 55%, transparent);
  --badge-text: color-mix(in srgb, var(--accent) 35%, #ffffff);
  --chip-text: color-mix(in srgb, var(--accent) 32%, #ffffff);
  --chip-line: color-mix(in srgb, var(--accent) 48%, transparent);
  --skel-a: rgba(255, 255, 255, 0.03);
  --skel-b: rgba(255, 255, 255, 0.07);
  --shadow: color-mix(in srgb, var(--accent) 65%, transparent);
  --violet: var(--accent);
}

html[data-theme="custom"][data-tone="light"] {
  color-scheme: light;
  --void: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #ffffff;
  --text: #16140f;
  --muted: #5f5a52;
  --dim: #96908a;
  --line: color-mix(in srgb, var(--accent) 22%, rgba(0, 0, 0, 0.1));
  --line-strong: color-mix(in srgb, var(--accent) 50%, rgba(0, 0, 0, 0.3));
  --grad: linear-gradient(
    112deg,
    color-mix(in srgb, var(--accent) 50%, #12100c) 0%,
    color-mix(in srgb, var(--accent) 68%, #12100c) 55%,
    color-mix(in srgb, var(--accent) 88%, #12100c) 100%
  );
  --glow-a: color-mix(in srgb, var(--accent) 16%, transparent);
  --glow-b: color-mix(in srgb, var(--accent) 10%, transparent);
  --grid: color-mix(in srgb, var(--accent) 12%, transparent);
  --tint-1: rgba(0, 0, 0, 0.03);
  --tint-2: rgba(0, 0, 0, 0.008);
  --tint-3: rgba(0, 0, 0, 0.025);
  --head-bg: rgba(246, 245, 241, 0.78);
  --cover-a: color-mix(in srgb, var(--accent) 18%, transparent);
  --cover-b: color-mix(in srgb, var(--accent) 8%, transparent);
  --cover-c: rgba(0, 0, 0, 0.03);
  --cover-grid: rgba(0, 0, 0, 0.06);
  --initial: rgba(0, 0, 0, 0.2);
  --badge-bg: rgba(255, 255, 255, 0.85);
  --badge-line: color-mix(in srgb, var(--accent) 50%, transparent);
  --badge-text: color-mix(in srgb, var(--accent) 60%, #000);
  --chip-text: color-mix(in srgb, var(--accent) 62%, #000);
  --chip-line: color-mix(in srgb, var(--accent) 45%, transparent);
  --skel-a: rgba(0, 0, 0, 0.03);
  --skel-b: rgba(0, 0, 0, 0.08);
  --shadow: color-mix(in srgb, var(--accent) 40%, transparent);
  --violet: color-mix(in srgb, var(--accent) 70%, #000);
}

html[data-theme="custom"][data-tone="light"] ::selection {
  background: color-mix(in srgb, var(--accent) 70%, #000);
  color: #fff;
}