/* 素材生成工具箱 - 门户样式 (苹果风格) */
:root {
  --bg: #fbfbfd;
  --card-bg: #ffffff;
  --text-main: #1d1d1f;
  --text-sub: #6e6e73;
  --text-muted: #a1a1a6;
  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.08);
  --border: rgba(0, 0, 0, 0.06);
  --border-soft: rgba(0, 0, 0, 0.04);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.06), 0 16px 40px rgba(0, 0, 0, 0.08);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
          "PingFang SC", "Helvetica Neue", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-main);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============ 顶部品牌 ============ */
.portal-header {
  padding: 80px 24px 48px;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

.brand-title {
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -0.6px;
  color: var(--text-main);
  margin: 0 0 12px;
  line-height: 1.1;
}

.brand-sub {
  font-size: 17px;
  color: var(--text-sub);
  margin: 0;
  letter-spacing: -0.2px;
  font-weight: 400;
}

/* ============ 卡片网格 ============ */
.tool-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding: 24px 24px 64px;
  max-width: 980px;
  margin: 0 auto;
  width: 100%;
}

@media (max-width: 900px) {
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .tool-grid { grid-template-columns: 1fr; padding: 16px 16px 48px; }
  .portal-header { padding: 56px 16px 32px; }
  .brand-title { font-size: 32px; }
}

.grid-skeleton {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-muted);
  padding: 60px 0;
  font-size: 14px;
}

/* ============ 卡片 ============ */
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 150px;
  position: relative;
  overflow: hidden;
}

.tool-card.enabled:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.tool-card.enabled:active {
  transform: translateY(0);
  box-shadow: var(--shadow-card);
}

.tool-card.disabled {
  cursor: default;
  background: #fafafa;
  border: 1px dashed rgba(0, 0, 0, 0.1);
  opacity: 0.55;
}

.tool-card.disabled:hover { transform: none; }

/* 图标方块 */
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #f5f5f7 0%, #e8e8ed 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  line-height: 1;
  flex-shrink: 0;
}

.tool-card.enabled .card-icon {
  background: linear-gradient(135deg, #f0f6ff 0%, #e1ecff 100%);
}

.tool-card.disabled .card-icon {
  filter: grayscale(0.5);
  opacity: 0.6;
}

.card-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0;
  letter-spacing: -0.2px;
  line-height: 1.3;
}

.tool-card.disabled .card-name {
  color: var(--text-sub);
}

.card-desc {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.5;
  margin: 0;
  flex: 1;
}

.tool-card.disabled .card-desc {
  color: var(--text-muted);
}

/* ============ 页脚（极简）============ */
.portal-footer {
  padding: 24px;
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.2px;
}