/* ===== Noesis Forge — Color Palette from Logo ===== */
:root {
  --navy:       #1a2744;
  --navy-light: #243352;
  --teal:       #2a7d96;
  --teal-light: #3ba8c4;
  --cyan:       #5ecde0;
  --gold:       #c9922e;
  --gold-light: #dbb05a;
  --ice:        #e8f4f8;
  --white:      #ffffff;
  --gray-100:   #f5f7fa;
  --gray-200:   #e2e6ec;
  --gray-400:   #94a0b4;
  --gray-600:   #5a6578;
  --gray-800:   #2c3444;

  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;

  --max-width: 1120px;
  --nav-height: 72px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(26, 39, 68, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(94, 205, 224, 0.1);
  transition: background 0.3s;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
}

.nav-logo-img {
  height: 44px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--gray-200);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--cyan);
}

.nav-cta {
  background: var(--gold);
  color: var(--white) !important;
  padding: 8px 20px;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s !important;
}

.nav-cta:hover {
  background: var(--gold-light) !important;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--gray-200);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(160deg, var(--navy) 0%, #162038 40%, var(--navy-light) 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(42, 125, 150, 0.25) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 20% 80%, rgba(201, 146, 46, 0.12) 0%, transparent 60%),
    radial-gradient(circle at 50% 50%, rgba(94, 205, 224, 0.04) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0%   { opacity: 0.7; }
  100% { opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 80px;
  max-width: 720px;
}

.hero-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 24px;
  border: 1px solid rgba(201, 146, 46, 0.3);
  padding: 6px 16px;
  border-radius: 4px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--white);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--gray-400);
  margin-bottom: 40px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  text-align: center;
}

.btn-primary {
  background: var(--teal);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--teal-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(42, 125, 150, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--gray-200);
  border: 1px solid var(--gray-400);
}

.btn-outline:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn-full {
  width: 100%;
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--gray-100);
}

.section-tag {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 48px;
  line-height: 1.2;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-text p {
  margin-bottom: 20px;
  color: var(--gray-600);
  font-size: 1.05rem;
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.value-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 28px;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.value-card:hover {
  border-color: var(--teal-light);
  box-shadow: 0 4px 20px rgba(42, 125, 150, 0.08);
}

.value-icon {
  font-size: 1.4rem;
  color: var(--teal);
  margin-bottom: 12px;
}

.value-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 8px;
}

.value-card p {
  font-size: 0.92rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ===== Research ===== */
.research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.research-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 40px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.research-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(26, 39, 68, 0.08);
  border-color: var(--teal-light);
}

.research-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--cyan);
  opacity: 0.5;
  margin-bottom: 16px;
}

.research-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 12px;
}

.research-card p {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.7;
}

.research-cta {
  text-align: center;
  margin-top: 48px;
  padding: 24px;
  border: 1px dashed var(--gray-200);
  border-radius: 8px;
  color: var(--gray-400);
  font-size: 0.95rem;
}

/* ===== Publications ===== */
.publications-list {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.pub-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 0;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(26, 39, 68, 0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}

.pub-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(26, 39, 68, 0.1);
}

.pub-card-accent {
  height: 6px;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
}

.pub-card-body {
  padding: 36px 40px;
}

.pub-type {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--navy);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
}

.pub-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.35;
}

.pub-card h3 a {
  transition: color 0.2s;
}

.pub-card h3 a:hover {
  color: var(--teal);
}

.pub-authors {
  font-size: 0.9rem;
  color: var(--gray-400);
  font-style: italic;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-200);
}

.pub-abstract {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 20px;
}

.pub-links {
  display: flex;
  gap: 12px;
}

.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 6px;
  border: none;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}

.pub-link-primary {
  color: var(--white);
  background: var(--teal);
}

.pub-link-primary:hover {
  background: var(--teal-light);
  transform: translateY(-1px);
}

.pub-link-secondary {
  color: var(--gray-600);
  background: none;
  border: 1px solid var(--gray-200);
}

.pub-link-secondary:hover {
  border-color: var(--navy);
  color: var(--navy);
  transform: translateY(-1px);
}

/* ===== Newsletter ===== */
.newsletter-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.newsletter-text p {
  color: var(--gray-600);
  font-size: 1.05rem;
}

.newsletter-form {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 40px;
}

/* ===== Contact ===== */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-text p {
  color: var(--gray-600);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.contact-details li {
  margin-bottom: 20px;
}

.contact-details strong {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 4px;
}

.contact-details a {
  color: var(--teal);
  font-weight: 500;
  transition: color 0.2s;
}

.contact-details a:hover {
  color: var(--teal-light);
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 40px;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 16px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  background: var(--white);
  color: var(--gray-800);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(42, 125, 150, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-note {
  text-align: center;
  font-size: 0.82rem;
  color: var(--gray-400);
  margin-top: 12px;
}

/* ===== Form Success State ===== */
.form-success {
  text-align: center;
  padding: 32px 16px;
}

.form-success-icon {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

.form-success h3 {
  font-size: 1.1rem;
  color: var(--navy);
  margin-bottom: 8px;
}

.form-success p {
  font-size: 0.92rem;
  color: var(--gray-600);
}

/* ===== Footer ===== */
.footer {
  background: var(--navy);
  padding: 60px 0 32px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.footer-brand {
  text-align: center;
}

.footer-brand .nav-logo-img {
  height: 36px;
  margin: 0 auto 12px;
}

.footer-brand p {
  color: var(--gray-400);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  color: var(--gray-400);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 24px;
  width: 100%;
  text-align: center;
}

.footer-bottom p {
  color: var(--gray-400);
  font-size: 0.82rem;
}

/* ===== Animations ===== */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .about-grid,
  .research-grid,
  .newsletter-container,
  .contact-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .section { padding: 72px 0; }
}

@media (max-width: 640px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: rgba(26, 39, 68, 0.98);
    flex-direction: column;
    padding: 32px 24px;
    gap: 24px;
    transform: translateY(-120%);
    transition: transform 0.35s ease;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero-content { padding-top: calc(var(--nav-height) + 24px); }
  .hero h1 { font-size: 2rem; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }

  .research-card { padding: 28px; }
  .newsletter-form, .contact-form { padding: 28px; }
  .section { padding: 56px 0; }
}