/* ============================================
   GRADPATH ACADEMY — Global Stylesheet
   ============================================ */

/* ---- Fonts ---- */
.font-display { font-family: 'Playfair Display', serif; }
.font-body    { font-family: 'DM Sans', sans-serif; }

/* ---- Base ---- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'DM Sans', sans-serif; }

/* ---- Animated Grid Background ---- */
.grid-bg {
  background-image:
    linear-gradient(rgba(251,175,8,0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(251,175,8,0.15) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ---- Buttons ---- */
.btn-primary {
  background-color: #FBAF08;
  color: #000;
  display: inline-block;
  position: relative;
  overflow: hidden;
}
.btn-primary::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: rgba(255,255,255,0.15);
  transition: left 0.3s ease;
}
.btn-primary:hover::after { left: 100%; }
.btn-primary:hover { background-color: #e09e00; }

.btn-outline {
  border: 2px solid #FBAF08;
  color: #FBAF08;
  display: inline-block;
  background: transparent;
  transition: all 0.3s ease;
}
.btn-outline:hover {
  background: #FBAF08;
  color: #000;
}

/* ---- Navbar ---- */
#main-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.5rem 0;
  transition: background 0.4s ease, padding 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent;
}
#main-nav.scrolled {
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(12px);
  padding: 1rem 0;
  border-bottom-color: rgba(251,175,8,0.2);
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #9ca3af;
  transition: color 0.2s;
  padding: 0;           /* reset any browser default padding */
  margin: 0;            /* reset any browser default margin */
  line-height: 1;
  background: none;
  border: none;
  cursor: pointer;
  vertical-align: middle;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: #FBAF08;
  transition: width 0.3s ease;
}
.nav-link:hover, .nav-link.active {
  color: #fff;
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Mobile nav */
#mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
}
#mobile-menu.open { display: flex; }
#mobile-menu .nav-link {
  font-size: 1.5rem;
  color: #fff;
  letter-spacing: 0.2em;
}

/* Hamburger */
.hamburger { cursor: pointer; display: flex; flex-direction: column; gap: 5px; }
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: #fff;
  transition: all 0.3s;
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Animations ---- */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4); }
  50%       { box-shadow: 0 0 0 10px rgba(37, 211, 102, 0); }
}

.animate-fade-in-down { animation: fadeInDown 0.7s ease forwards; opacity: 0; }
.animate-fade-in-up   { animation: fadeInUp 0.7s ease forwards; opacity: 0; }

/* ---- Hero Rotating Text ---- */
.rotating-hero-text { display: inline-block; }

/* ---- Programs Tab ---- */
.tab-btn {
  background: transparent;
  color: #6b7280;
  border: none;
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
}
.tab-btn.active-tab {
  background: #FBAF08;
  color: #000;
}
.tab-btn:not(.active-tab):hover {
  background: rgba(251,175,8,0.1);
  color: #FBAF08;
}

.tab-content {
  animation: fadeInUp 0.4s ease forwards;
}
.tab-content.hidden { display: none; }

/* ---- Form Inputs ---- */
.form-input { border-radius: 0; }
.form-input:focus { outline: none; }
select.form-input option {
  background: #0a0a0a;
  color: #fff;
}

/* ---- WhatsApp pulse ---- */
.whatsapp-btn { animation: pulse-glow 2.5s infinite; }

/* ---- Footer ---- */
footer {
  background: #000;
  border-top: 1px solid rgba(251,175,8,0.2);
}

/* ---- Scroll reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav-links-desktop { display: none !important; }
  .hamburger { display: flex !important; }
}
@media (min-width: 769px) {
  .hamburger { display: none !important; }
}

/* ---- Nav Dropdown (click-based, hidden by default) ---- */
.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.dropdown-menu {
  /* HIDDEN BY DEFAULT */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}
/* Only visible when .open class is added by JS click */
.dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.nav-dropdown .nav-link svg { transition: transform 0.25s ease; }
.nav-dropdown.open .nav-link svg { transform: rotate(180deg); }

/* ---- Faculty Cards ---- */
.faculty-card {
  background: #0a0a0a;
  border: 1px solid #1f2937;
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.faculty-card:hover {
  border-color: #FBAF08;
  transform: translateY(-4px);
}
.faculty-avatar {
  background: linear-gradient(135deg, #1f2937 0%, #111 100%);
  overflow: hidden;
}

/* ---- Accordion FAQ ---- */
.faq-item { border-bottom: 1px solid #1f2937; }
.faq-btn {
  width: 100%; text-align: left; background: transparent; border: none;
  cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  padding: 1.5rem 0; gap: 1rem;
}
.faq-icon {
  width: 28px; height: 28px; flex-shrink: 0;
  border: 1px solid #374151; display: flex; align-items: center; justify-content: center;
  transition: background 0.25s, border-color 0.25s, transform 0.3s;
}
.faq-btn[aria-expanded="true"] .faq-icon {
  background: #FBAF08;
  border-color: #FBAF08;
  transform: rotate(45deg);
}
.faq-btn[aria-expanded="true"] .faq-icon svg { color: #000; }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), padding 0.3s;
}
.faq-answer.open { max-height: 400px; padding-bottom: 1.5rem; }

/* ---- Accreditation partner logo placeholders ---- */
.partner-logo {
  border: 1px solid #1f2937;
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem 2rem; transition: border-color 0.25s;
}
.partner-logo:hover { border-color: rgba(251,175,8,0.4); }

/* ═══════════════════════════════════
   RESEARCH PAGE
═══════════════════════════════════ */
.pub-card {
  background: #0a0a0a;
  border: 1px solid #1f2937;
  transition: border-color .35s, transform .35s;
}
.pub-card:hover {
  border-color: #FBAF08;
  transform: translateY(-4px);
}
.pub-tag {
  display: inline-block;
  background: rgba(251,175,8,.1);
  border: 1px solid rgba(251,175,8,.25);
  color: #FBAF08;
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: .15em;
  padding: .25rem .6rem;
  font-weight: 600;
}
.symposium-card {
  background: linear-gradient(135deg, #0d0d0d 0%, #111 100%);
  border: 1px solid #1f2937;
  transition: border-color .3s;
}
.symposium-card:hover { border-color: rgba(251,175,8,.5); }

/* ═══════════════════════════════════
   ALUMNI PAGE
═══════════════════════════════════ */
.alumni-profile-card {
  background: #0a0a0a;
  border: 1px solid #1f2937;
  transition: border-color .35s, transform .35s;
  position: relative;
  overflow: hidden;
}
.alumni-profile-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #FBAF08, transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s ease;
}
.alumni-profile-card:hover::before { transform: scaleX(1); }
.alumni-profile-card:hover {
  border-color: rgba(251,175,8,.4);
  transform: translateY(-4px);
}
.roi-stat {
  border-left: 2px solid #FBAF08;
  padding-left: 1rem;
}
.event-card {
  background: #0a0a0a;
  border: 1px solid #1f2937;
  transition: border-color .3s;
}
.event-card:hover { border-color: rgba(251,175,8,.4); }

/* ╔═══════════════════════════════════════════════════════
   ║  MOBILE RESPONSIVENESS FIXES (v9)
   ║  Defensive layer — does not alter desktop appearance.
   ║  Breakpoints used:
   ║    ≤ 380px : single-column stats, tightest padding
   ║    ≤ 480px : compact 2-col stats, fluid hero type
   ║    ≤ 768px : WhatsApp lift, watermark scaling
   ╚═══════════════════════════════════════════════════════ */

/* Belt-and-suspenders: kill any accidental horizontal scroll. */
html, body {
  max-width: 100%;
  overflow-x: hidden;
}

/* All embedded media stays inside its container. */
img, video, svg, iframe {
  max-width: 100%;
  height: auto;
}

/* Long words ("Application", URLs, emails) wrap instead of pushing the layout. */
h1, h2, h3, h4, p, li, a {
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* ── Stats grids ────────────────────────────────────────
   Marked with .stats-grid in the HTML. Used on:
   index.html, about.html, alumni.html, research.html,
   student-resources.html. */

/* Smallest phones (≤380px): collapse to one column. */
@media (max-width: 380px) {
  .stats-grid {
    grid-template-columns: 1fr !important;
  }
}

/* Standard phones (≤480px): compact 2-col, fluid number sizing. */
@media (max-width: 480px) {
  .stats-grid > div {
    padding: 1.25rem !important;       /* down from p-8 (2rem) */
  }
  .stats-grid .text-5xl {
    font-size: clamp(1.75rem, 8.5vw, 2.5rem) !important;
    line-height: 1.05;
  }
  .stats-grid .text-xl {
    font-size: 1rem !important;
    line-height: 1.25;
  }
}

/* ── Hero H1 headings ──────────────────────────────────
   Tailwind's .text-5xl (3rem) is fine on most phones, but
   long words like "Application" can overflow at 320–360px. */
@media (max-width: 480px) {
  h1.font-display {
    font-size: clamp(2rem, 9vw, 3rem) !important;
    line-height: 1.1;
  }
}

/* ── Decorative oversized watermark numbers ────────────
   Programs page uses bare .text-7xl for "MBA" / "DBA" callouts;
   no md: prefix means they apply on phones too. */
@media (max-width: 768px) {
  .text-7xl {
    font-size: clamp(2.5rem, 11vw, 4.5rem) !important;
  }
  .text-6xl {
    font-size: clamp(2.25rem, 9vw, 3.75rem) !important;
  }
}

/* ── WhatsApp floating button ──────────────────────────
   Lifts above mobile-browser bottom UI bars and respects
   notched-device safe areas. */
@media (max-width: 768px) {
  .whatsapp-btn {
    bottom: 80px !important;
    right: 18px !important;
    width: 56px !important;
    height: 56px !important;
  }
}
@supports (padding: max(0px)) {
  @media (max-width: 768px) {
    .whatsapp-btn {
      bottom: max(80px, calc(env(safe-area-inset-bottom) + 70px)) !important;
      right:  max(18px, env(safe-area-inset-right)) !important;
    }
  }
}

/* ── Page padding tightens on the smallest phones ──────
   Frees ~16px of horizontal real estate at 320–380px. */
@media (max-width: 380px) {
  .px-6 { padding-left: 1rem !important; padding-right: 1rem !important; }
}

/* ── Mobile menu polish ────────────────────────────────
   Make the full-screen menu scrollable in case content
   exceeds viewport height (long dropdown lists). */
#mobile-menu {
  overflow-y: auto;
  padding: 5rem 1.5rem 2rem;
}
#mobile-menu .nav-link {
  padding: 0.5rem 0;     /* larger tap target */
}