:root {
  --bg: #050d10;
  --bg-soft: #0b1210;
  --panel: rgba(9, 19, 17, 0.92);
  --panel-strong: rgba(10, 24, 20, 0.96);
  --line: rgba(45, 143, 108, 0.45);
  --green: #1f8d68;
  --green-bright: #3eb88c;
  --text: #e8efed;
  --text-soft: #c1cec9;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }

body {
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(31, 141, 104, 0.28), transparent 34%),
    radial-gradient(circle at 88% 15%, rgba(62, 184, 140, 0.22), transparent 35%),
    linear-gradient(180deg, var(--bg-soft), var(--bg));
  display: flex;
  flex-direction: column;
}

.container { width: min(1100px, 92vw); margin: 0 auto; }

.navbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(5, 13, 10, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

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

.logo {
  color: var(--text);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 700;
  font-size: .9rem;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.nav-links a,
.nav-links button {
  color: var(--text-soft);
  background: transparent;
  border: 0;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  padding: .45rem .7rem;
  border-radius: 999px;
  transition: color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
  border: 1px solid transparent;
}

.nav-links a:hover,
.nav-links button:hover,
a:hover {
  color: var(--green-bright);
}

.nav-links a:hover,
.nav-links button:hover {
  border-color: var(--line);
  box-shadow: 0 0 16px rgba(62, 184, 140, 0.2);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: .5rem;
  background: transparent;
  padding: .4rem .75rem;
}

.nav-item { position: relative; }

.dropdown {
  position: absolute;
  top: calc(100% + .35rem);
  left: 0;
  min-width: 235px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: .7rem;
  padding: .35rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: all 160ms ease;
}

.dropdown a {
  display: block;
  border-radius: .45rem;
}

.nav-item.open .dropdown,
.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

main {
  flex: 1;
  padding: 2rem 0 3rem;
}

.page-panel {
  background: linear-gradient(180deg, var(--panel), rgba(7, 15, 13, 0.96));
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: clamp(1.2rem, 3vw, 2.2rem);
  box-shadow: 0 15px 40px rgba(0, 0, 0, .4);
}

h1, h2, h3 {
  font-family: Georgia, "Times New Roman", serif;
  color: #f0f4f3;
  line-height: 1.15;
}

h1 { font-size: clamp(2rem, 5.1vw, 4.2rem); text-align: center; margin: 0 0 1rem; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin: 0 0 .8rem; }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); margin: .8rem 0 .5rem; }

p, li { color: var(--text-soft); }
a { color: var(--green); text-decoration: none; }

.hero-copy {
  text-align: center;
  max-width: 70ch;
  margin: 0 auto;
}

.cta-group { display: flex; justify-content: center; flex-wrap: wrap; gap: .85rem; margin-top: 1.4rem; }

.btn {
  display: inline-block;
  min-width: 190px;
  text-align: center;
  padding: .8rem 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  color: #03100d;
  background: linear-gradient(180deg, var(--green-bright), var(--green));
  border-color: rgba(74, 203, 157, 0.7);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 10px 18px rgba(9,42,33,.55);
}

.btn-secondary {
  color: var(--text);
  border-color: var(--line);
  background: linear-gradient(180deg, rgba(17,30,26,.95), rgba(10,18,15,.95));
}

.brain-image {
  margin: 1.8rem auto 0;
  max-width: 720px;
}

.brain-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: 0 0 35px rgba(62, 184, 140, 0.2);
}

.section { margin-top: 1.8rem; }
.card-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit,minmax(250px,1fr)); }
.project-card, .form-card {
  background: rgba(11, 22, 19, 0.88);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
}

input, textarea {
  width: 100%;
  margin-top: .35rem;
  border-radius: .5rem;
  border: 1px solid var(--line);
  background: #08120f;
  color: var(--text);
  padding: .65rem .75rem;
}

button.primary {
  margin-top: .45rem;
  background: linear-gradient(180deg, var(--green-bright), var(--green));
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #04110e;
  font-weight: 700;
  padding: .68rem 1.2rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(6, 14, 12, .88);
}

.footer-copy {
  margin: 0;
  text-align: center;
  padding: 1rem 0 1.15rem;
  color: var(--text-soft);
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .nav-links {
    position: absolute;
    right: 4vw;
    top: calc(100% + .45rem);
    width: min(300px, 90vw);
    background: var(--panel-strong);
    border: 1px solid var(--line);
    border-radius: .75rem;
    padding: .8rem;
    flex-direction: column;
    align-items: stretch;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
  }

  .nav-links.open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .nav-item .dropdown { position: static; opacity: 1; pointer-events: auto; transform: none; margin-top: .35rem; }
}

/* Login gateway */
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(35, 133, 101, 0.28), transparent 42%),
    linear-gradient(180deg, rgba(10, 20, 17, 0.96), rgba(5, 13, 10, 1));
}

.login-page main {
  width: min(500px, 92vw);
  padding: 1rem;
}

.login-card {
  background: linear-gradient(180deg, rgba(10, 24, 20, 0.88), rgba(8, 16, 14, 0.9));
  border: 1px solid rgba(62, 184, 140, 0.35);
  border-radius: 18px;
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45), 0 0 24px rgba(62, 184, 140, 0.15);
  backdrop-filter: blur(8px);
}

.login-card h1 {
  text-align: left;
  font-size: clamp(1.7rem, 4vw, 2.2rem);
  margin-bottom: 0.7rem;
}

.login-form {
  display: grid;
  gap: 0.95rem;
  margin-top: 1rem;
}

.login-form label {
  display: inline-block;
  font-size: 0.93rem;
}

.login-button {
  margin-top: 0.4rem;
  width: 100%;
  border: 1px solid rgba(74, 203, 157, 0.7);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  font-weight: 700;
  color: #04110e;
  background: linear-gradient(180deg, var(--green-bright), var(--green));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), 0 8px 18px rgba(9, 42, 33, 0.45);
  cursor: pointer;
}

.continue-link {
  display: inline-block;
  margin-top: 0.9rem;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.continue-link:hover {
  color: var(--green-bright);
}