:root {
  --main-bg: #101d2e;
  --main-bg-light: #f3f6fa;
  --card-bg: #151e2e;
  --card-bg-light: #fff;
  --accent: #00bfa5;
  --accent2: #7c4dff;
  --text: #e6edf3;
  --text-light: #20232a;
  --border: #232b43;
  --border-light: #ececf3;
  --shadow: 0 2px 12px 0 rgba(60,80,140,0.14);
  --radius: 16px;
  --header-h: 64px;
  --hero-gradient: linear-gradient(135deg, #111c2e 0%, #2c145b 100%);
  --hero-gradient-light: linear-gradient(135deg, #f3f6fa 0%, #ded6f9 100%);
  --transition: 0.3s cubic-bezier(.5,0,.5,1);
}

html, body {
  margin: 0;
  padding: 0;
  overflow-x: hidden !important;
  max-width: 100vw !important;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--main-bg);
  color: var(--text);
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
}

body.light {
  background: var(--main-bg-light);
  color: var(--text-light);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 1.5rem;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  transition: background var(--transition);
}

body.light .main-nav {
  background: var(--card-bg-light);
  border-bottom: 1px solid var(--border-light);
}

.main-nav .logo {
  font-weight: 700;
  color: var(--accent);
  font-size: 1.4rem;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.main-nav ul li a {
  text-decoration: none;
  color: inherit;
  font-weight: 600;
  transition: color var(--transition);
  position: relative;
}

.main-nav ul li a::after {
  content: "";
  display: block;
  margin: 0 auto;
  width: 0%;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s;
}

.main-nav ul li a:hover::after {
  width: 100%;
}

#darkmode-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  margin-left: 2rem;
  color: var(--accent2);
  transition: color var(--transition);
}
body.light #darkmode-toggle {
  color: var(--accent);
}

.hero {
  padding: 3rem 1.5rem 2rem;
  background: var(--hero-gradient);
  color: #fff;
  border-radius: var(--radius);
  margin: 2rem auto 2.5rem auto;
  max-width: 900px;
  box-shadow: var(--shadow);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: background var(--transition), color var(--transition);
}
body.light .hero {
  background: var(--hero-gradient-light);
  color: var(--text-light);
}

.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 0.6rem;
  color: var(--accent2);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 1.2rem;
}

.hero .cta-btn {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 1.1rem;
  padding: 0.7rem 2rem;
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: background var(--transition), box-shadow var(--transition);
  cursor: pointer;
  margin-top: 1rem;
}
.hero .cta-btn:hover {
  background: var(--accent2);
  color: #fff;
  box-shadow: 0 6px 24px 0 rgba(70,0,140,0.18);
}

.section {
  max-width: 960px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
}

.card-list {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: var(--card-bg);
  color: inherit;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.2rem 1.3rem 1.2rem;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform 0.12s;
  border: 1px solid var(--border);
  text-align: left;
  min-height: 220px;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-8px) scale(1.04);
  box-shadow: 0 8px 36px 0 rgba(70,0,140,0.13);
  background: #1b243c;
}

body.light .card {
  background: var(--card-bg-light);
  color: var(--text-light);
  border: 1px solid var(--border-light);
}

body.light .card:hover {
  background: #f9f9fe;
}

.card h3 {
  margin-top: 0;
  font-size: 1.25rem;
  color: var(--accent);
}
.card p {
  margin-bottom: 0.6rem;
}

.card .card-link {
  color: var(--accent2);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  margin-top: 1rem;
  display: inline-block;
  transition: color var(--transition);
}
.card .card-link:hover {
  color: var(--accent);
  text-decoration: underline;
}

footer {
  text-align: center;
  font-size: 1rem;
  padding: 2.5rem 1rem 1.2rem 1rem;
  color: #aaa;
  background: none;
  border-top: none;
}

::-webkit-scrollbar {
  width: 8px;
  background: #131b2e;
}
::-webkit-scrollbar-thumb {
  background: var(--accent2);
  border-radius: 6px;
}

body.light ::-webkit-scrollbar {
  background: #e5e6ea;
}
body.light ::-webkit-scrollbar-thumb {
  background: var(--accent);
}

@media (max-width: 700px) {
  .main-nav { padding: 0 0.7rem; height: auto; }
  .main-nav ul { gap: 1.1rem; }
  .hero { padding: 2rem 0.4rem 1.5rem; }
  .card-list { gap: 1.2rem; }
  .card { padding: 1.3rem 0.6rem 1.1rem 0.6rem; min-height: 150px; }
  .section { padding: 0 0.5rem; }
}

/* Ko-fi & scroll fix */
#kofi-widget-overlay {
  position: fixed !important;
  right: 20px !important;
  left: auto !important;
  bottom: 20px !important;
  transform: none !important;
  max-width: 320px !important;
  width: auto !important;
  z-index: 9999 !important;
  overflow: hidden !important;
}