* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", sans-serif;
  scroll-behavior: smooth;
}

html, body {
  width: 100%;
  overflow-x: hidden;
}

:root {
  --bg: #f5f6fa;
  --text: #111;
  --primary: #0a58ca;
  --card: white;
  --shadow: rgba(0, 0, 0, 0.08);
  --darkbg: #0f172a;
}

body {
  background: var(--bg);
  color: var(--text);
  transition: 0.3s;
}

/* DARK MODE */
body.dark-mode {
  --bg: #0b1220;
  --text: #ffffff;
  --card: rgba(255, 255, 255, 0.06);
  --shadow: rgba(255, 255, 255, 0.06);
}

/* SPLASH SCREEN */
.splash {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: #0f172a;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 999999;
  transition: 0.6s ease;
}

.splash-logo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  background: rgba(255,255,255,0.08);
  padding: 15px;
  animation: splashPulse 1.2s infinite;
}

.splash-text {
  margin-top: 15px;
  color: white;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 1px;
  opacity: 0.9;
}

@keyframes splashPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.85;
  }
  50% {
    transform: scale(1.12);
    opacity: 1;
  }
}

.splash.hide {
  opacity: 0;
  pointer-events: none;
}

/* NAVBAR */
.header {
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 999;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  transition: 0.3s;
}

body.dark-mode .header {
  background: rgba(10, 10, 10, 0.6);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.header.scrolled {
  padding: 3px 0;
  box-shadow: 0px 6px 20px rgba(0,0,0,0.15);
}

.navbar {
  width: 100%;
  max-width: 1100px;
  margin: auto;
  padding: 15px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo h2 {
  font-size: 18px;
  letter-spacing: 1px;
  font-weight: 800;
  color: var(--text);
}

.logo span {
  font-size: 12px;
  opacity: 0.8;
}

/* NAV LINKS */
.nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.nav-links li a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: 0.3s;
}

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

.nav-links li a.active {
  color: var(--primary);
  font-weight: 700;
}

/* RIGHT */
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* THEME BUTTON */
.theme-btn {
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 16px;
  background: var(--primary);
  color: white;
  transition: 0.3s;
}

.theme-btn:hover {
  opacity: 0.8;
}

/* HAMBURGER */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle div {
  width: 28px;
  height: 3px;
  background: var(--text);
  border-radius: 5px;
  transition: 0.3s;
}

.menu-toggle.active div:nth-child(1) {
  transform: rotate(45deg) translateY(11px);
}

.menu-toggle.active div:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active div:nth-child(3) {
  transform: rotate(-45deg) translateY(-11px);
}

/* HERO */
.hero {
  width: 100%;
  min-height: 100vh;
  background: linear-gradient(to right, rgba(10, 88, 202, 0.85), rgba(0, 0, 0, 0.75)),
    url("irmus1.jpeg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 110px 20px 70px;
}

.hero-content {
  max-width: 850px;
  text-align: center;
  color: white;
}

.hero-content h1 {
  font-size: 44px;
  margin-bottom: 15px;
}

.hero-content p {
  font-size: 18px;
  margin-bottom: 25px;
  opacity: 0.92;
}

.hero-btn {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  padding: 12px 22px;
  background: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: 10px;
  transition: 0.3s;
  font-weight: 600;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-outline {
  display: inline-block;
  padding: 12px 22px;
  border: 2px solid white;
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  transition: 0.3s;
}

.btn-outline:hover {
  background: white;
  color: black;
}

/* SECTION */
.section {
  padding: 90px 20px;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: auto;
}

.section-title {
  font-size: 32px;
  margin-bottom: 12px;
  text-align: center;
}

.section-desc {
  text-align: center;
  max-width: 700px;
  margin: auto;
  margin-bottom: 40px;
  opacity: 0.85;
  line-height: 1.5;
}

/* GRID */
.about-grid,
.division-grid,
.program-grid,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.vision-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  background: var(--card);
  padding: 22px;
  border-radius: 14px;
  box-shadow: 0px 6px 18px var(--shadow);
  transition: 0.3s;
}

.card:hover {
  transform: translateY(-6px);
}

.dark {
  background: var(--darkbg);
  color: white;
}

.dark-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255,255,255,0.12);
  color: white;
}

.misi-list {
  padding-left: 18px;
  line-height: 1.7;
}

/* PROGRAM */
.program-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 22px;
  border-radius: 14px;
  transition: 0.3s;
}

.program-card:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.1);
}

/* GALLERY */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.gallery-item {
  height: 180px;
  border-radius: 14px;
  background-size: cover;
  background-position: center;
  cursor: pointer;
  transition: 0.3s;
}

.gallery-item:hover {
  transform: scale(1.03);
}

/* IG LINK */
.ig-link {
  color: white;
  text-decoration: none;
  font-weight: 600;
  transition: 0.3s;
}

.ig-link:hover {
  color: #60a5fa;
  text-decoration: underline;
}

/* FORM */
.contact-form {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.contact-form input,
.contact-form textarea {
  padding: 12px;
  border-radius: 12px;
  border: none;
  outline: none;
  font-size: 16px;
}

.contact-form textarea {
  height: 120px;
  resize: none;
}

.form-status {
  margin-top: 5px;
  font-weight: 600;
  text-align: center;
  font-size: 15px;
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 20px;
  background: var(--primary);
  color: white;
}

/* BACK TOP */
.back-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--primary);
  color: white;
  border: none;
  padding: 12px 15px;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  display: none;
  transition: 0.3s;
  z-index: 999;
}

.back-top:hover {
  opacity: 0.8;
}

/* LIGHTBOX */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.85);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.lightbox img {
  max-width: 85%;
  max-height: 85%;
  border-radius: 12px;
}

.close-lightbox {
  position: absolute;
  top: 30px;
  right: 40px;
  font-size: 40px;
  color: white;
  cursor: pointer;
}

/* SCROLL ANIMATION */
.scroll-animate {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.9s ease;
}

.scroll-animate.show {
  opacity: 1;
  transform: translateY(0px);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .about-grid,
  .division-grid,
  .program-grid,
  .contact-grid,
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-content h1 {
    font-size: 32px;
  }
}

@media (max-width: 700px) {
  .nav-links {
    position: absolute;
    top: 70px;
    right: 0;
    background: rgba(255,255,255,0.95);
    width: 100%;
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    display: none;
  }

  body.dark-mode .nav-links {
    background: rgba(10,10,10,0.95);
  }

  .nav-links.active {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  .about-grid,
  .division-grid,
  .program-grid,
  .contact-grid,
  .vision-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-content p {
    font-size: 15px;
  }

  .splash-logo {
    width: 140px;
    height: 140px;
  }
}