/**
 * 友链申请区块样式 - 3.0 极致版
 * 修复了对比度、交互反馈及暗色模式兼容性
 */
:root {
  --apply-primary: #4f46e5;
  --apply-primary-hover: #4338ca;
  --apply-bg: rgba(255, 255, 255, 0.75);
  --apply-border: rgba(0, 0, 0, 0.08);
  --apply-text-main: #1f2937;
  --apply-text-sub: #6b7280;
  --apply-input-bg: rgba(255, 255, 255, 0.5);
  --apply-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.1);
}

/* 兼容系统暗色及主题类名暗色 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --apply-bg: rgba(31, 31, 35, 0.8);
    --apply-border: rgba(255, 255, 255, 0.12);
    --apply-text-main: #f3f4f6;
    --apply-text-sub: #a1a1aa;
    --apply-input-bg: rgba(0, 0, 0, 0.2);
    --apply-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  }
}
[data-theme="dark"] {
  --apply-bg: rgba(31, 31, 35, 0.8);
  --apply-border: rgba(255, 255, 255, 0.12);
  --apply-text-main: #f3f4f6;
  --apply-text-sub: #a1a1aa;
  --apply-input-bg: rgba(0, 0, 0, 0.2);
  --apply-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* 主容器 */
.friends-apply {
  position: relative;
  margin: 2rem auto;
  padding: 2rem;
  max-width: 480px;
  border-radius: 20px;
  background: var(--apply-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--apply-border);
  box-shadow: var(--apply-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* 悬浮轻微浮起 */
.friends-apply:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.15);
}

/* 标题区域 */
.friends-apply__header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.friends-apply__title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--apply-text-main);
  margin-bottom: 0.5rem;
}

.friends-apply__subtitle {
  font-size: 0.85rem;
  color: var(--apply-text-sub);
  line-height: 1.5;
}

/* 输入框区域 */
.friends-apply #friends-api {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.friends-apply #friends-api input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1.5px solid var(--apply-border);
  background: var(--apply-input-bg);
  color: var(--apply-text-main);
  font-size: 0.9rem;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-sizing: border-box;
}

/* 输入框焦点动效 */
.friends-apply #friends-api input:focus {
  outline: none;
  background: var(--apply-bg);
  border-color: var(--apply-primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
  transform: scale(1.01);
}

.friends-apply #friends-api input::placeholder {
  color: var(--apply-text-sub);
  opacity: 0.6;
}

/* 提交按钮 */
.friends-apply__btn {
  margin-top: 8px;
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: var(--apply-primary);
  color: #fff !important;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  overflow: hidden;
  position: relative;
}

.friends-apply__btn::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: 0.5s;
}

.friends-apply__btn:hover {
  background: var(--apply-primary-hover);
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.friends-apply__btn:hover::after {
  left: 100%;
}

.friends-apply__btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  filter: grayscale(1);
}

/* 规则列表 */
.friends-apply__list {
  margin: 1.25rem 0 0;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.03);
  border-radius: 12px;
  list-style: none;
}

[data-theme="dark"] .friends-apply__list {
  background: rgba(255, 255, 255, 0.05);
}

.friends-apply__list li {
  font-size: 0.8rem;
  color: var(--apply-text-sub);
  margin-bottom: 6px;
  padding-left: 1.2rem;
  position: relative;
}

.friends-apply__list li:last-child { margin-bottom: 0; }

.friends-apply__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--apply-primary);
  font-weight: bold;
}

/* 响应式适配 */
@media (max-width: 550px) {
  .friends-apply {
    margin: 1rem;
    padding: 1.5rem;
    max-width: none;
  }
  
  .friends-apply__title {
    font-size: 1.15rem;
  }
}