:root {
  --bg-primary: #0f1419;
  --bg-secondary: #1a1f2e;
  --bg-elevated: #22283a;
  --text-primary: #f2f6fc;
  --text-secondary: #c4cbe0;
  --text-muted: #8f99b5;
  --aws-orange: #ff9900;
  --electric-blue: #147efb;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.28);
  --shadow-strong: 0 18px 40px rgba(0, 0, 0, 0.42);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Segoe UI", "Roboto", sans-serif;
  line-height: 1.5;
  color: var(--text-primary);
  background:
    radial-gradient(circle at 15% 0%, rgba(20, 126, 251, 0.12), transparent 45%),
    radial-gradient(circle at 85% 100%, rgba(255, 153, 0, 0.1), transparent 40%),
    var(--bg-primary);
}

body::-webkit-scrollbar {
  width: 10px;
}

body::-webkit-scrollbar-track {
  background: #121823;
}

body::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #38415c, #2a3148);
  border-radius: 12px;
}

body::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #465071, #323a55);
}

* {
  scrollbar-color: #3a4462 #121823;
  scrollbar-width: thin;
}

.app {
  width: min(1150px, 92vw);
  margin: 0 auto;
  padding: 2rem 0 1.25rem;
  position: relative;
  z-index: 2;
}

.bg-glow {
  position: fixed;
  width: 30rem;
  height: 30rem;
  border-radius: 999px;
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

.bg-glow-top {
  top: -9rem;
  right: -8rem;
  background: rgba(20, 126, 251, 0.3);
}

.bg-glow-bottom {
  left: -9rem;
  bottom: -12rem;
  background: rgba(255, 153, 0, 0.22);
}

.header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  background: linear-gradient(145deg, rgba(31, 37, 53, 0.88), rgba(24, 28, 40, 0.84));
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 1.25rem 1.4rem;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 60px;
  height: 60px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: linear-gradient(150deg, rgba(255, 153, 0, 0.28), rgba(20, 126, 251, 0.2));
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.brand-cloud {
  font-size: 1.15rem;
  line-height: 1;
}

.brand-aws {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  margin-top: -2px;
}

h1 {
  margin: 0;
  font-size: clamp(1.4rem, 2.7vw, 2rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.subtitle {
  margin: 0.35rem 0 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.item-count {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.tabs-section {
  margin-top: 1.05rem;
}

.tabs {
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  padding: 0.12rem 0 0.65rem;
  scrollbar-width: thin;
}

.tabs::-webkit-scrollbar {
  height: 8px;
}

.tabs::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 20px;
}

.tabs::-webkit-scrollbar-thumb {
  background: rgba(95, 111, 151, 0.6);
  border-radius: 20px;
}

.tab-btn {
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  background: rgba(25, 30, 43, 0.88);
  border-radius: 999px;
  padding: 0.54rem 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.52rem;
  cursor: pointer;
  transition: all 0.24s ease;
  white-space: nowrap;
  font-size: 0.9rem;
}

.tab-btn:hover {
  color: var(--text-primary);
  transform: translateY(-1px);
  border-color: rgba(20, 126, 251, 0.45);
}

.tab-btn.active {
  color: #fff;
  background: linear-gradient(120deg, rgba(255, 153, 0, 0.2), rgba(20, 126, 251, 0.25));
  border-color: rgba(20, 126, 251, 0.62);
  box-shadow: 0 8px 18px rgba(20, 126, 251, 0.2);
}

.tab-btn.active .tab-count {
  background: rgba(255, 255, 255, 0.19);
}

.tab-count {
  font-size: 0.78rem;
  color: inherit;
  background: rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  padding: 0.14rem 0.45rem;
  min-width: 1.65rem;
  text-align: center;
}

.news-grid {
  margin-top: 0.35rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1rem;
}

.news-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.76rem;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(180deg, rgba(33, 39, 56, 0.96), rgba(26, 31, 46, 0.96));
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: var(--shadow-soft);
  min-height: 220px;
  transition: transform 0.27s ease, box-shadow 0.27s ease, border-color 0.27s ease;
}

.news-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid transparent;
  transition: border-color 0.27s ease;
  pointer-events: none;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-strong);
  border-color: rgba(20, 126, 251, 0.34);
}

.news-card:hover::after {
  border-color: rgba(255, 153, 0, 0.32);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.source-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.28rem 0.58rem;
  border: 1px solid transparent;
}

.tag-whats-new {
  color: #ffd194;
  background: rgba(255, 153, 0, 0.2);
  border-color: rgba(255, 153, 0, 0.44);
}

.tag-news-blog {
  color: #9ec8ff;
  background: rgba(20, 126, 251, 0.2);
  border-color: rgba(20, 126, 251, 0.44);
}

.tag-architecture {
  color: #ccb8ff;
  background: rgba(122, 91, 255, 0.22);
  border-color: rgba(122, 91, 255, 0.45);
}

.tag-security {
  color: #a6e7ce;
  background: rgba(0, 180, 120, 0.18);
  border-color: rgba(0, 180, 120, 0.4);
}

.tag-default {
  color: #d4dbf3;
  background: rgba(102, 118, 150, 0.2);
  border-color: rgba(102, 118, 150, 0.45);
}

.external-icon {
  opacity: 0;
  transform: translateX(-4px);
  color: var(--aws-orange);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.news-card:hover .external-icon {
  opacity: 1;
  transform: translateX(0);
}

.news-title {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.news-summary {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  min-height: 4.15em;
}

.news-date {
  margin: auto 0 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer {
  margin-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 0.85rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.empty-state,
.error-state {
  margin-top: 1rem;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(29, 35, 51, 0.88);
  color: var(--text-secondary);
  padding: 1rem;
}

.error-state h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: #ffd194;
}

.error-state p {
  margin: 0;
}

.hidden {
  display: none;
}

.card-fade-in {
  opacity: 0;
  transform: translateY(12px);
  animation: rise-in 0.45s ease forwards;
  animation-delay: calc(var(--stagger) * 34ms);
}

.skeleton-card {
  pointer-events: none;
}

.skeleton {
  border-radius: 8px;
  background: linear-gradient(90deg, rgba(79, 92, 124, 0.2), rgba(105, 122, 161, 0.28), rgba(79, 92, 124, 0.2));
  background-size: 240% 100%;
  animation: skeleton-shimmer 1.2s infinite linear;
}

.skeleton-badge {
  width: 130px;
  height: 22px;
}

.skeleton-title {
  width: 90%;
  height: 24px;
  margin-top: 0.35rem;
}

.skeleton-line {
  width: 100%;
  height: 14px;
}

.skeleton-line.short {
  width: 78%;
}

.skeleton-date {
  margin-top: auto;
  width: 95px;
  height: 12px;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes skeleton-shimmer {
  from {
    background-position: 240% 0;
  }
  to {
    background-position: -240% 0;
  }
}

@media (max-width: 960px) {
  .header {
    flex-direction: column;
    align-items: flex-start;
  }

  .item-count {
    font-size: 0.84rem;
  }
}

@media (max-width: 680px) {
  .app {
    width: min(95vw, 1150px);
    padding-top: 1.2rem;
  }

  .brand-mark {
    width: 52px;
    height: 52px;
  }

  .subtitle {
    font-size: 0.88rem;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .news-card {
    min-height: 205px;
  }
}