/* =========================================================
   HAEGL DCET Responsive Stylesheet
   Optimized for Desktops, Tablets, and Mobile Devices
   ========================================================= */

/* Prevent any horizontal page overflow */
html, body {
  overflow-x: hidden !important;
  max-width: 100vw;
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .site-nav a:not(.btn) { padding: 0.5rem 0.5rem; font-size: 0.9rem; }
  .stats-ribbon { grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
  .about-pillars-grid, .about-facilities-grid, .about-roadmap { grid-template-columns: repeat(2, 1fr); }
  .about-metrics-ribbon { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .about-metric-card:nth-child(2)::after { display: none; }
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 5%;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 0.3rem; }
  .site-nav a:not(.btn) { padding: 0.6rem 0.8rem; font-size: 0.95rem; }
  .site-nav .btn { display: block; text-align: center; margin: 0.5rem 0 0.2rem; }
  .hero-grid, .two-col, .footer-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .admissions-hub { max-width: 100%; margin-top: 1.5rem; }
  .about-story-grid { grid-template-columns: 1fr; gap: 2rem; }
  .about-mv-grid { grid-template-columns: 1fr; }
}

/* Announcement Banner Mobile Treatment (<= 680px) */
@media (max-width: 680px) {
  .announcement {
    padding: 0.45rem 0.6rem;
  }
  .announcement-inner {
    padding: 0 1.8rem 0 0.5rem;
  }
  .announcement-content {
    flex-direction: column;
    gap: 0.35rem;
    align-items: center;
    text-align: center;
    width: 100%;
  }
  .announcement-title {
    font-size: 0.72rem;
    line-height: 1.3;
    letter-spacing: 0.02em;
  }
  .announcement-dot {
    display: none;
  }
  .announcement-actions {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    flex-wrap: wrap;
  }
  .announcement-tag {
    font-size: 0.65rem;
    padding: 0.12rem 0.5rem;
  }
  .announcement-btn {
    font-size: 0.68rem;
    padding: 0.2rem 0.65rem;
  }
  .announcement-close {
    top: 0.35rem;
    right: 0.25rem;
    transform: none;
    font-size: 1.15rem;
    padding: 0.2rem 0.4rem;
  }
}

/* Handheld Smartphones (<= 600px) */
@media (max-width: 600px) {
  .section { padding: 2.6rem 0; }
  .hero {
    padding: 2.2rem 0 2rem;
    overflow: hidden;
  }
  .container {
    width: 92%;
    margin-inline: auto;
    max-width: 100%;
  }
  .nav-wrap {
    padding: 0.6rem 0;
  }
  .brand-logo {
    height: 38px;
    max-width: 135px;
  }
  .hero-grid {
    grid-template-columns: 100%;
    gap: 1.8rem;
  }
  .hero-content {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }
  .inst-pill {
    max-width: 100%;
    font-size: 0.72rem;
    padding: 0.22rem 0.55rem;
    gap: 0.35rem;
    flex-wrap: wrap;
    line-height: 1.35;
  }
  .inst-pill-text {
    font-size: 0.72rem;
  }
  .inst-pill-badge {
    font-size: 0.62rem;
    padding: 0.08rem 0.35rem;
  }
  .hero h1, .hero-headline {
    font-size: clamp(1.55rem, 6.8vw, 2.1rem);
    line-height: 1.25;
    letter-spacing: -0.02em;
    overflow-wrap: break-word;
    word-break: normal;
    margin-bottom: 0.65rem;
  }
  .hero-lead {
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 1.1rem;
    max-width: 100%;
  }
  .btn-row.hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.7rem;
    margin: 0.8rem 0 1.2rem;
  }
  .btn-row.hero-actions .btn {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
  .institutional-trust-strip {
    display: flex;
    align-items: center;
    gap: 1.4rem;
    justify-content: flex-start;
    padding-top: 0.9rem;
    width: 100%;
    max-width: 100%;
  }
  .trust-metric strong {
    font-size: 1.15rem;
  }
  .trust-metric span {
    font-size: 0.7rem;
  }
  .kea-aligned-card {
    padding: 1.15rem 1.15rem;
    border-radius: 12px;
  }
  .kea-card-title {
    font-size: 1.05rem;
  }
  .kea-point-box {
    padding: 0.65rem 0.75rem;
    gap: 0.65rem;
  }
  .kea-point-content strong {
    font-size: 0.85rem;
  }
  .kea-point-content p {
    font-size: 0.76rem;
  }
  .kea-card-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .grid-3, .grid-4, .form-grid { grid-template-columns: 1fr; }
  .filter-bar input, .filter-bar select { width: 100%; }
  .btn-row .btn { width: 100%; text-align: center; }
  .stats-ribbon { grid-template-columns: 1fr; gap: 1.2rem; padding: 1.5rem; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--line); padding-bottom: 1rem; }
  .stat-item:last-child { border-bottom: none; padding-bottom: 0; }
  .about-hero { padding: 3rem 0 2.5rem; }
  .about-pillars-grid, .about-facilities-grid, .about-roadmap, .about-metrics-ribbon { grid-template-columns: 1fr; }
  .about-metric-card::after { display: none !important; }
  .about-metric-card { border-bottom: 1px solid rgba(255, 255, 255, 0.1); padding-bottom: 1rem; }
  .about-metric-card:last-child { border-bottom: none; padding-bottom: 0; }
  .about-cta-container { padding: 2.5rem 1.2rem; }
}