/* Base + Theme */
:root {
  --bg: #0f172a;
  /* slate-900 */
  --bg-soft: rgba(15, 23, 42, 0.6);
  --text: #e5e7eb;
  /* gray-200 */
  --muted: #cbd5e1;
  /* slate-300 */
  --brand: #60a5fa;
  /* blue-400 */
  --card: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.12);
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}

body.dark {
  /* kept for toggle parity */
  --bg: #0f172a;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  /* stronger overlay */
  z-index: -1;
}

* {
  box-sizing: border-box
}

html {
  scroll-behavior: smooth
}

body {
  margin: 0;
  font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(2, 6, 23, 1) 0%, rgba(15, 23, 42, 1) 100%),
    url('https://images.unsplash.com/photo-1498050108023-c5249f4df085?q=80&w=2400&auto=format&fit=crop') center/cover fixed no-repeat;
  background-blend-mode: overlay;
}

/* Utility */
.container {
  width: min(1100px, 92%);
  margin-inline: auto;
}

.section {
  padding: 72px 0
}

.section.alt {
  background: rgba(255, 255, 255, 0.02)
}

.lede {
  font-size: 1.125rem;
  line-height: 1.8
}

.keypoints {
  margin: 1rem 0 0;
  padding-left: 1rem
}

.keypoints li {
  margin: .25rem 0
}

.note {
  margin-top: 1rem;
  color: var(--muted);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  width: auto;
  height: auto;
  background: #111;
  color: #fff;
  padding: .5rem .75rem;
  border-radius: .5rem;
}

/* Nav */
.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(120%) blur(10px);
  background: linear-gradient(to bottom, rgba(2, 6, 23, .75), rgba(2, 6, 23, .4));
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .75rem 0;
}

.nav ul {
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none
}

.nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600
}

.nav a:hover {
  color: var(--brand)
}

.brand {
  font-weight: 800;
  letter-spacing: .3px
}

.theme-toggle {
  border: 1px solid rgba(255, 255, 255, .2);
  background: transparent;
  color: var(--text);
  padding: .4rem .6rem;
  border-radius: .5rem;
  cursor: pointer;
}

/* Hero */
.hero {
  position: relative;
  min-height: 58vh;
  display: grid;
  place-items: center;
  text-align: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(2, 6, 23, .2), rgba(2, 6, 23, .7));
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 48px 16px;
  max-width: 900px;
  margin: auto
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin: 0 0 .5rem
}

.hero p {
  color: var(--muted);
  margin: 0 0 1.25rem
}

.cta-row {
  display: flex;
  gap: .75rem;
  justify-content: center;
  flex-wrap: wrap
}

/* Buttons */
.btn,
.btn-ghost,
.btn-sm {
  display: inline-block;
  text-decoration: none;
  cursor: pointer;
  border-radius: .75rem;
  font-weight: 600
}

.btn {
  background: var(--brand);
  color: #0b1220;
  padding: .75rem 1rem;
  border: 0
}

.btn:hover {
  filter: brightness(1.1)
}

.btn-ghost {
  border: 1px solid var(--brand);
  color: var(--text);
  padding: .7rem 1rem
}

.btn-ghost:hover {
  background: rgba(96, 165, 250, .1)
}

.btn-sm {
  border: 1px solid rgba(255, 255, 255, .24);
  color: var(--text);
  padding: .45rem .65rem;
  border-radius: .6rem
}

.btn-sm:hover {
  background: rgba(255, 255, 255, .08)
}

/* Cards Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.25rem;
}

.card {
  grid-column: span 12;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
}

.card:hover {
  transform: translateY(-2px)
}

.card img {
  width: 100%;
  height: 220px;
  object-fit: cover
}

.card-body {
  padding: 1rem 1rem 1.25rem
}

.card h3 {
  margin: .4rem 0 .35rem;
  font-size: 1.25rem
}

.card p {
  margin: 0 0 .6rem;
  color: var(--muted)
}

.badges {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin: .25rem 0 .75rem
}

.badge {
  font-size: .8rem;
  padding: .25rem .5rem;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: .5rem
}

.links {
  display: flex;
  gap: .5rem
}

/* Contact */
.contact-form {
  margin-top: 1rem;
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 1rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.field {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  margin-bottom: .8rem
}

label {
  font-weight: 600
}

input,
textarea {
  background: #0b1220;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: .6rem;
  padding: .7rem .8rem;
  font: inherit;
}

input:focus,
textarea:focus {
  outline: 2px solid var(--brand);
  outline-offset: 2px
}

.social {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap
}

.social a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, .2)
}

.social a:hover {
  color: var(--brand);
  border-bottom-color: var(--brand)
}

/* Footer */
.footer {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 24px 0;
  color: var(--muted);
  text-align: center
}

/* Responsive */
@media (min-width: 700px) {
  .card {
    grid-column: span 6;
  }
}

@media (min-width: 1024px) {
  .card {
    grid-column: span 4;
  }
}
/* ===== Dark mode (ONLY applies when body has .dark) ===== */
body.dark {
  /* page/base text */
  background-color: #0b1220;
  /* deep navy */
  color: #e5e7eb;
  /* slate-200 */
}

/* Header / hero */
body.dark .hero {
  color: #e5e7eb;
}

body.dark .nav a,
body.dark .brand {
  color: #e5e7eb;
}

body.dark .nav a:hover,
body.dark .brand:hover {
  color: #ffffff;
}

body.dark .theme-toggle {
  background: transparent;
  color: #e5e7eb;
  border-color: rgba(148, 163, 184, 0.35);
}

/* Sections */
body.dark .section {
  background: transparent;
  /* keep layout; just use dark body bg */
  color: #e5e7eb;
}

body.dark .section.alt {
  background: #0e1526;
  /* subtle panel shade for alt rows */
}

/* Cards */
body.dark .card {
  background: #0f172a;
  /* slate-900 */
  border-color: rgba(148, 163, 184, 0.15);
  /* subtle border */
  color: #e5e7eb;
  box-shadow: 0 8px 24px rgba(2, 6, 23, 0.6);
  /* deeper shadow */
}

body.dark .card img {
  filter: none;
  /* keep images vibrant */
}

/* Small badges / meta pills */
body.dark .badge,
body.dark .meta li {
  background: rgba(148, 163, 184, 0.12);
  /* slate-400 @ 12% */
  border-color: rgba(148, 163, 184, 0.28);
  color: #cbd5e1;
  /* slate-300 */
}

/* Links */
body.dark a {
  color: #7dd3fc;
  /* sky-300 */
}

body.dark a:hover {
  color: #bae6fd;
  /* sky-200 */
}

/* Buttons */
body.dark .btn {
  background: #2563eb;
  /* keep your primary blue */
  color: #ffffff;
  border-color: transparent;
}

body.dark .btn:hover {
  filter: brightness(1.08);
}

body.dark .btn.btn-ghost,
body.dark .btn.secondary,
body.dark .btn-sm {
  background: #1e293b;
  /* slate-800 */
  color: #e5e7eb;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

body.dark .btn.disabled {
  background: #475569;
  /* slate-600 */
  color: #cbd5e1;
}

/* Contact form */
body.dark .contact-form input,
body.dark .contact-form textarea {
  background: #0b1220;
  color: #e5e7eb;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

body.dark .contact-form input::placeholder,
body.dark .contact-form textarea::placeholder {
  color: #94a3b8;
  /* slate-400 */
}

/* Footer */
body.dark .footer {
  background: transparent;
  color: #cbd5e1;
  border-top-color: rgba(148, 163, 184, 0.2);
}

/* Utility / muted text */
body.dark .muted,
body.dark .note {
  color: #94a3b8;
  /* slate-400 */
}