:root {
  --color-primary: #4865f7;
  --color-text: #4d4d5d;
  --color-dark: #1f2233;
  --color-bg-alt: #f1f3f9;
  --font-heading: "Prata", serif;
  --font-body: "Montserrat", sans-serif;
  --max-width: 1140px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  line-height: 1.6;
}

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

h1, h2, h3 {
  font-family: var(--font-heading);
  color: var(--color-dark);
  font-weight: 400;
}

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--color-dark);
}

.header__logo-mark {
  height: 40px;
  width: auto;
  flex-shrink: 0;
}

.header__logo-text {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.2;
}

.nav__list {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav__list a {
  color: var(--color-dark);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav__list a:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  margin: 0 auto;
}

/* Hero */
.hero {
  position: relative;
  height: 100vh;
  min-height: 480px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  color: #fff;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(31, 34, 51, 0.85), rgba(72, 101, 247, 0.6));
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero h1 {
  color: #fff;
  font-size: 2.6rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.15rem;
  margin-bottom: 28px;
}

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 14px 32px;
  border-radius: 4px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 1rem;
  transition: background 0.2s;
}

.btn:hover {
  background: #2f48d6;
}

/* Sections */
.section {
  padding: 90px 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section__title {
  font-size: 2.2rem;
  margin-bottom: 40px;
  text-align: center;
}

.section__intro {
  text-align: center;
  margin-top: -20px;
  margin-bottom: 40px;
  color: var(--color-text);
}

/* About */
.about {
  max-width: 760px;
  margin: 0 auto;
}

.about p {
  margin-bottom: 18px;
}

.about ul {
  margin: 0 0 18px 20px;
}

.about li {
  margin-bottom: 8px;
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.project-card {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.project-card__logo {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  padding: 24px;
}

.project-card__logo img {
  max-width: 100%;
  max-height: 90px;
  object-fit: contain;
}

.project-card__logo--dark {
  background: var(--color-dark);
}

.project-card__logo--text {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-primary);
  background: var(--color-dark);
}

.project-card__body {
  padding: 20px 24px 24px;
}

.project-card__body h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.project-card__year {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-bg-alt);
  padding: 2px 10px;
  border-radius: 12px;
}

.project-card__body p {
  font-size: 0.92rem;
  color: var(--color-text);
}

/* Timeline */
.timeline {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
  padding-left: 32px;
  border-left: 3px solid var(--color-bg-alt);
}

.timeline__item {
  position: relative;
  margin-bottom: 40px;
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -41px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #fff;
}

.timeline__year {
  font-family: var(--font-heading);
  color: var(--color-primary);
  font-size: 1.2rem;
  margin-bottom: 8px;
}

/* Board */
.board-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 28px;
}

.board-member {
  text-align: center;
}

.board-member img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 14px;
  background: var(--color-bg-alt);
}

.board-member h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.board-member p {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
}

/* Contact */
.contact {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
}

.contact__info h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
  margin-top: 20px;
}

.contact__info h3:first-child {
  margin-top: 0;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.contact__form label {
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 10px;
}

.contact__form input,
.contact__form textarea {
  padding: 12px 14px;
  border: 1px solid #d9dce5;
  border-radius: 4px;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.contact__form input:focus,
.contact__form textarea:focus {
  outline: 2px solid var(--color-primary);
}

.contact__form .btn {
  margin-top: 16px;
  align-self: flex-start;
}

.contact__form-note {
  font-size: 0.8rem;
  color: #9a9aa8;
  margin-top: 10px;
}

/* Footer */
.footer {
  background: var(--color-dark);
  color: #fff;
  padding: 30px 0;
  text-align: center;
  font-size: 0.85rem;
}

.footer__legal {
  margin-top: 8px;
  color: #aaa;
}

.footer__logo {
  height: 36px;
  width: auto;
  margin-bottom: 16px;
}

/* Responsive */
@media (max-width: 860px) {
  .nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav.is-open {
    max-height: 320px;
  }

  .nav__list {
    flex-direction: column;
    gap: 0;
    padding: 10px 24px;
  }

  .nav__list li {
    border-bottom: 1px solid var(--color-bg-alt);
  }

  .nav__list a {
    display: block;
    padding: 14px 0;
  }

  .nav-toggle {
    display: flex;
  }

  .header__logo-text {
    display: none;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .contact {
    grid-template-columns: 1fr;
  }
}