:root {
  --bg: #eef2f5;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --text: #101828;
  --muted: #667085;
  --primary: #0b66ff;
  --primary-dark: #0352d8;
  --border: #d9e1ea;
  --shadow: 0 14px 30px rgba(16, 24, 40, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, #dbeafe 0%, transparent 35%),
    radial-gradient(circle at 85% 20%, #ffe7d6 0%, transparent 32%),
    var(--bg);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(10px);
  background: rgba(247, 250, 253, 0.86);
}

.topbar__inner {
  width: min(1240px, 92vw);
  margin: 0 auto;
  min-height: 74px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
}

.brand {
  margin: 0;
  font-size: clamp(1.25rem, 1.7vw, 1.55rem);
}

.topbar__search input,
.topbar__search--text {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.72rem 1rem;
  background: #fff;
  font: inherit;
  color: var(--muted);
}

.nav-links {
  display: flex;
  gap: 0.45rem;
}

.nav-links a {
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  color: #344054;
  background: #fff;
  font-size: 0.9rem;
}

.nav-links a.is-active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

.home-main {
  width: min(1240px, 92vw);
  margin: 1.2rem auto 2rem;
}

.upload-main {
  width: min(1240px, 92vw);
  margin: 1.2rem auto 2rem;
  display: grid;
  grid-template-columns: minmax(260px, 320px) 1fr;
  gap: 1rem;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.upload-panel {
  position: sticky;
  top: 92px;
  padding: 1rem;
  background: linear-gradient(180deg, #ffffff, var(--panel-soft));
}

.upload-panel h2 {
  margin-top: 0;
}

.upload-form {
  display: grid;
  gap: 0.8rem;
}

.upload-form label {
  display: grid;
  gap: 0.38rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.upload-form input,
.upload-form textarea,
.upload-form select,
.upload-form button,
.ghost-btn {
  font: inherit;
  border-radius: 10px;
}

.upload-form input,
.upload-form textarea,
.upload-form select {
  width: 100%;
  border: 1px solid var(--border);
  padding: 0.65rem 0.72rem;
}

.upload-form button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 0.76rem;
  cursor: pointer;
}

.upload-form button:hover {
  background: var(--primary-dark);
}

.gallery-panel {
  padding: 1rem;
}

.gallery-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 0.7rem;
}

.gallery-header h2 {
  margin: 0;
}

.result-count {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.ghost-btn {
  margin-left: auto;
  border: 1px solid var(--border);
  background: #fff;
  padding: 0.52rem 0.76rem;
  cursor: pointer;
  color: var(--muted);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.filter-btn {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 0.35rem 0.78rem;
  cursor: pointer;
  font-size: 0.9rem;
}

.filter-btn.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.gallery {
  columns: 1;
  column-gap: 0.95rem;
}

.card {
  display: inline-block;
  width: 100%;
  margin: 0 0 0.95rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 22px rgba(16, 24, 40, 0.12);
}

.card__image {
  width: 100%;
  height: auto;
  display: block;
}

.card__meta {
  padding: 0.78rem;
}

.card__title {
  margin: 0;
  font-size: 1rem;
}

.card__country {
  margin: 0.32rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.card__category {
  margin: 0.32rem 0 0;
  color: #0b66ff;
  font-size: 0.82rem;
  font-weight: 700;
}

.card__desc {
  margin: 0.45rem 0 0;
  font-size: 0.88rem;
  color: #344054;
}

.empty-tip {
  color: var(--muted);
  margin: 0.6rem 0 0.2rem;
}

@media (min-width: 760px) {
  .gallery {
    columns: 2;
  }
}

@media (min-width: 1120px) {
  .gallery {
    columns: 3;
  }
}

@media (max-width: 980px) {
  .upload-main {
    grid-template-columns: 1fr;
  }

  .upload-panel {
    position: static;
  }

  .topbar__inner {
    grid-template-columns: 1fr;
    gap: 0.7rem;
    padding: 0.7rem 0;
  }

  .ghost-btn {
    margin-left: 0;
  }
}

.site-footer {
  width: min(1240px, 92vw);
  margin: auto auto 1.2rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.75);
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.7;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.site-footer a {
  color: #0b66ff;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}