:root {
  --bg: #f5f6f2;
  --surface: #ffffff;
  --text: #30363d;
  --muted: #667079;
  --border: #e2e6df;
  --green: #9bcf24;
  --cyan: #20b8d7;
  --orange: #f3a32b;
  --magenta: #e72788;
  --shadow: 0 18px 45px rgba(36, 48, 56, 0.10);
  --shadow-hover: 0 22px 55px rgba(36, 48, 56, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(155, 207, 36, 0.08), transparent 25rem),
    radial-gradient(circle at 90% 30%, rgba(32, 184, 215, 0.08), transparent 24rem),
    var(--bg);
}

a {
  color: inherit;
}

.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 190px;
  display: flex;
  align-items: center;
  gap: 46px;
  padding: 28px 0;
}

.school-logo-link {
  display: block;
  flex: 0 0 280px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.school-logo-link:hover,
.school-logo-link:focus-visible {
  transform: translateY(-2px);
  opacity: 0.92;
}

.school-logo {
  display: block;
  width: 100%;
  height: auto;
}

.header-title {
  padding-left: 4px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.header-title h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.25rem);
  line-height: 1;
  letter-spacing: -0.045em;
  font-weight: 800;
}

.header-title h1 span {
  color: #49525a;
  font-weight: 600;
}

.header-title p {
  max-width: 650px;
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.65;
}

.accent-line {
  height: 5px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 0.8fr;
}

.accent-line span:nth-child(1) { background: var(--green); }
.accent-line span:nth-child(2) { background: var(--cyan); }
.accent-line span:nth-child(3) { background: var(--orange); }
.accent-line span:nth-child(4) { background: var(--magenta); }

.main-content {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 76px 0 90px;
  flex: 1;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.project-card {
  position: relative;
  overflow: hidden;
  min-height: 310px;
  padding: 34px;
  display: flex;
  flex-direction: column;
  text-align: left;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
  color: var(--text);
  text-decoration: none;
  font: inherit;
  cursor: pointer;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--accent, var(--green));
}

.project-card::after {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  right: -55px;
  bottom: -55px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent, var(--green)) 11%, transparent);
}

.project-card:hover,
.project-card:focus-visible {
  transform: translateY(-7px);
  box-shadow: var(--shadow-hover);
  border-color: color-mix(in srgb, var(--accent, var(--green)) 38%, var(--border));
  outline: none;
}

.card-robotica { --accent: var(--green); }
.card-3d { --accent: var(--cyan); }
.card-contactos { --accent: var(--orange); }

.card-icon {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  margin-bottom: 32px;
  border-radius: 18px;
  background: color-mix(in srgb, var(--accent, var(--green)) 12%, white);
  font-size: 1.9rem;
}

.card-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-content h3 {
  margin: 0 0 12px;
  font-size: 1.5rem;
  line-height: 1.2;
}

.card-content p {
  margin: 0 0 28px;
  color: var(--muted);
  line-height: 1.65;
}

.card-action {
  margin-top: auto;
  color: #3e474e;
  font-weight: 700;
}

.card-action span {
  color: var(--accent, var(--green));
}

.site-footer {
  padding: 24px 20px 28px;
  text-align: center;
  color: #758087;
  font-size: 0.92rem;
}

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 24px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 32, 36, 0.58);
  backdrop-filter: blur(4px);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: min(470px, 100%);
  padding: 42px 36px 38px;
  text-align: center;
  border-radius: 24px;
  background: var(--surface);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.25);
}

.modal-close {
  position: absolute;
  top: 13px;
  right: 16px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: #f0f2ee;
  color: #485159;
  font-size: 1.65rem;
  cursor: pointer;
}

.modal-close:hover,
.modal-close:focus-visible {
  background: #e4e8e1;
  outline: 2px solid #9aa4aa;
  outline-offset: 2px;
}

.modal-icon {
  font-size: 2.8rem;
  margin-bottom: 10px;
}

.modal-panel h2 {
  margin: 0 0 15px;
  font-size: 1.8rem;
}

.modal-panel p {
  margin: 8px 0;
  color: var(--muted);
  line-height: 1.6;
}

.construction-note {
  display: inline-block;
  padding: 8px 15px;
  border-radius: 999px;
  background: rgba(32, 184, 215, 0.11);
  color: #15758a !important;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.82rem;
}

.email-link {
  display: inline-block;
  margin-top: 12px;
  padding: 12px 18px;
  border-radius: 12px;
  background: #f2f4ef;
  color: #344049;
  font-weight: 750;
  text-decoration: none;
}

.email-link:hover,
.email-link:focus-visible {
  text-decoration: underline;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 900px) {
  .header-inner {
    min-height: auto;
    align-items: flex-start;
    gap: 28px;
  }

  .school-logo-link {
    flex-basis: 220px;
  }

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

  .project-card {
    min-height: 0;
  }
}

@media (max-width: 650px) {
  .header-inner {
    width: min(100% - 28px, 1180px);
    flex-direction: column;
    padding: 24px 0 28px;
  }

  .school-logo-link {
    width: min(250px, 78vw);
    flex-basis: auto;
  }

  .header-title h1 {
    font-size: clamp(2.2rem, 12vw, 3.35rem);
  }

  .header-title p {
    font-size: 1rem;
  }

  .main-content {
    width: min(100% - 28px, 1180px);
    padding: 42px 0 56px;
  }

  .project-grid {
    gap: 18px;
  }

  .project-card {
    padding: 28px;
    border-radius: 20px;
  }

  .card-icon {
    margin-bottom: 24px;
  }

  .modal-panel {
    padding: 40px 24px 32px;
  }
}