:root {
  --bg: #f7f7f9;
  --fg: #1f2933;
  --muted: #4b5563;
  --accent: #ea382b;
  --card: #ffffff;
  --border: #e5e7eb;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  --radius: 12px;
  --font:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Segoe UI", Roboto, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  width: 100%;
  max-width: 100%;
  font-size: 16px;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  position: relative;
  -webkit-overflow-scrolling: touch;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
video,
iframe {
  max-width: 100%;
  height: auto;
  display: block;
}

table {
  width: 100%;
  max-width: 100%;
  display: block;
  overflow-x: auto;
}

pre,
code {
  max-width: 100%;
  overflow-x: auto;
  word-break: break-all;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
  width: 100%;
  box-sizing: border-box;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.brand a {
  color: var(--fg);
}

.brand a:hover {
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
}

nav a {
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--fg);
  font-weight: 600;
  font-size: 0.95rem;
}

nav a:hover {
  background: var(--border);
  text-decoration: none;
}

nav a.active {
  background: var(--accent);
  color: #fff;
}

.wrapper {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 60px;
  box-sizing: border-box;
}

.hero {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 28px;
  overflow: hidden;
}

.hero-split {
  display: flex;
  min-height: 320px;
}

.hero-image {
  flex: 1;
  background-size: cover;
  background-position: center;
  position: relative;
}

.hero-image.left {
  background-image: url("../images/cover_one.png");
}

.hero-image.right {
  background-image: url("../images/home_cover.png");
}

.hero-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.1),
    rgba(0, 0, 0, 0.4)
  );
}

.hero-content {
  padding: 32px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 2rem;
}

.hero p {
  margin: 0 0 18px;
  color: var(--muted);
  max-width: 760px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.btn {
  display: inline-block;
  padding: 11px 16px;
  border-radius: 10px;
  font-weight: 700;
  border: 1px solid var(--accent);
  color: #fff;
  background: var(--accent);
}

.btn.secondary {
  background: #fff;
  color: var(--accent);
}

.btn:hover {
  filter: brightness(0.95);
  text-decoration: none;
}

.code-block {
  background: #0f172a;
  color: #e5e7eb;
  border-radius: 10px;
  padding: 14px 16px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.95rem;
  overflow-x: auto;
  margin: 0 0 14px;
  max-width: 100%;
  word-wrap: break-word;
  word-break: break-word;
  white-space: pre-wrap;
}

.code-wrap {
  position: relative;
  max-width: 100%;
  overflow: hidden;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  border: 1px solid #e5e7eb;
  background: rgba(255, 255, 255, 0.08);
  color: #e5e7eb;
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s ease;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.16);
}

.section-title {
  margin: 36px 0 14px;
  font-size: 1.35rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 16px;
}

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

.card h3 {
  margin: 0 0 8px;
}

.card p {
  margin: 0 0 12px;
  color: var(--muted);
}

.card ul {
  margin: 0 0 12px 18px;
  color: var(--muted);
}

.author {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  box-shadow: var(--shadow);
}

.pill .icon.lucide {
  display: inline-flex;
  width: 18px;
  height: 18px;
}

.pill .icon.lucide svg {
  width: 18px;
  height: 18px;
}

.author .name {
  font-weight: 700;
}

.author-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--border);
  color: var(--fg);
  font-weight: 600;
}

.pill i {
  color: var(--accent);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

footer {
  margin-top: 40px;
  padding: 20px 0 10px;
  color: var(--muted);
  font-size: 0.95rem;
  text-align: center;
}

.contact-text {
  margin: 12px 0 16px;
  color: var(--muted);
}

.location-text {
  margin-top: 14px;
  color: var(--muted);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--fg);
  cursor: pointer;
  padding: 8px;
}

/* Tablet (768px and below) */
@media (max-width: 768px) {
  .hero-split {
    flex-direction: column;
    min-height: 180px;
  }
  .hero-image {
    min-height: 120px;
  }
  .hero h1 {
    font-size: 1.6rem;
  }
  .hero p {
    font-size: 0.95rem;
  }
  .wrapper {
    padding: 24px 16px 40px;
  }
  .section-title {
    font-size: 1.2rem;
    margin: 28px 0 12px;
  }
  .cards {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .card {
    padding: 16px;
  }
  .author {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .author-links {
    gap: 8px;
  }
  .pill {
    padding: 6px 10px;
    font-size: 0.85rem;
  }
}

/* Mobile menu (640px and below) */
@media (max-width: 640px) {
  .mobile-menu-btn {
    display: block;
  }
  header.topbar {
    flex-wrap: wrap;
    gap: 0;
  }
  .topbar-row {
    display: flex;
    width: 100%;
    justify-content: space-between;
    align-items: center;
  }
  nav {
    width: 100%;
    display: none;
    margin-top: 10px;
  }
  nav.open {
    display: block;
  }
  nav ul {
    flex-direction: column;
    gap: 4px;
  }
  nav a {
    display: block;
    padding: 10px 14px;
    border-radius: 8px;
  }
  nav a:hover {
    background: var(--border);
  }
  .hero-content {
    padding: 16px;
  }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
  header.topbar {
    padding: 12px 14px;
  }
  .brand {
    font-size: 1rem;
  }
  nav a {
    padding: 6px 10px;
    font-size: 0.85rem;
  }
  .hero-split {
    min-height: 140px;
  }
  .hero-image {
    min-height: 80px;
  }
  .hero-content {
    padding: 16px;
  }
  .hero h1 {
    font-size: 1.35rem;
    margin-bottom: 10px;
  }
  .hero p {
    font-size: 0.9rem;
    margin-bottom: 14px;
  }
  .cta-row {
    flex-direction: column;
    gap: 8px;
  }
  .btn {
    width: 100%;
    text-align: center;
    padding: 12px 14px;
    font-size: 0.9rem;
  }
  .code-block {
    font-size: 0.85rem;
    padding: 12px 14px;
  }
  .copy-btn {
    padding: 5px 8px;
    font-size: 0.75rem;
  }
  .wrapper {
    padding: 16px 12px 32px;
  }
  .section-title {
    font-size: 1.1rem;
    margin: 24px 0 10px;
  }
  .card h3 {
    font-size: 1rem;
  }
  .card p,
  .card ul {
    font-size: 0.9rem;
  }
  .avatar {
    width: 60px;
    height: 60px;
  }
  .author .name {
    font-size: 0.95rem;
  }
  .author .muted {
    font-size: 0.85rem;
  }
  .pill {
    padding: 6px 10px;
    font-size: 0.8rem;
    gap: 6px;
  }
  .links {
    flex-direction: column;
    gap: 8px;
  }
  .links .btn {
    width: 100%;
  }
  footer {
    font-size: 0.85rem;
    padding: 16px 0 8px;
  }
}

/* iPhone Pro Max / Plus (428-430px) */
@media (max-width: 430px) {
  .wrapper {
    padding: 20px 16px 40px;
  }
  .hero h1 {
    font-size: 1.5rem;
  }
  .hero p {
    font-size: 0.95rem;
  }
  .cards {
    grid-template-columns: 1fr;
  }
}

/* iPhone 14/15/16 Pro (393px) */
@media (max-width: 393px) {
  header.topbar {
    padding: 12px 14px;
  }
  .brand {
    font-size: 1rem;
  }
  .wrapper {
    padding: 16px 14px 36px;
  }
  .hero h1 {
    font-size: 1.4rem;
  }
  .hero p {
    font-size: 0.9rem;
  }
  .code-block {
    font-size: 0.82rem;
    padding: 12px;
  }
  .card {
    padding: 14px;
  }
  .btn {
    padding: 11px 14px;
    font-size: 0.88rem;
  }
}

/* iPhone 11/12/13/14 (390px) */
@media (max-width: 390px) {
  .wrapper {
    padding: 14px 12px 32px;
  }
  .hero-content {
    padding: 14px;
  }
  .hero h1 {
    font-size: 1.35rem;
  }
  .section-title {
    font-size: 1.1rem;
  }
  .pill {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
}

/* iPhone SE / Mini (375px) */
@media (max-width: 375px) {
  header.topbar {
    padding: 10px 12px;
  }
  .brand {
    font-size: 0.95rem;
  }
  .wrapper {
    padding: 12px 10px 28px;
  }
  .hero-content {
    padding: 12px;
  }
  .hero h1 {
    font-size: 1.25rem;
  }
  .hero p {
    font-size: 0.85rem;
  }
  .code-block {
    font-size: 0.78rem;
    padding: 10px;
  }
  .section-title {
    font-size: 1rem;
  }
  .card h3 {
    font-size: 0.95rem;
  }
  .card p,
  .card ul {
    font-size: 0.85rem;
  }
  .avatar {
    width: 56px;
    height: 56px;
  }
  .pill {
    padding: 5px 8px;
    font-size: 0.75rem;
    gap: 5px;
  }
  footer {
    font-size: 0.8rem;
  }
}

/* Extra small (320px - older devices) */
@media (max-width: 320px) {
  html {
    font-size: 14px;
  }
  header.topbar {
    padding: 8px 10px;
  }
  .brand {
    font-size: 0.9rem;
  }
  .wrapper {
    padding: 10px 8px 24px;
  }
  .hero h1 {
    font-size: 1.15rem;
  }
  .hero p {
    font-size: 0.8rem;
  }
  .btn {
    padding: 10px 12px;
    font-size: 0.82rem;
  }
}

/* Landscape orientation fix for all iPhones */
@media (max-height: 500px) and (orientation: landscape) {
  .hero-split {
    min-height: 100px;
  }
  .hero-image {
    min-height: 60px;
  }
  .hero-content {
    padding: 12px;
  }
}

/* Safe area insets for iPhone notch/Dynamic Island */
@supports (padding: max(0px)) {
  header.topbar {
    padding-left: max(14px, env(safe-area-inset-left));
    padding-right: max(14px, env(safe-area-inset-right));
  }
  .wrapper {
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
  }
  footer {
    padding-bottom: max(10px, env(safe-area-inset-bottom));
  }
}