/* ==========================================================================
   Departemen Kajian & Aksi Strategis - PEMA USU Stylesheet
   ========================================================================== */

/* --- CSS Variables & Theme Tokens --- */
:root {
  --color-primary: #f5f1ca;
  --color-secondary: #ffffff;
  --color-text: #d8d6c6;
  --color-text-muted: #a3a194;
  --color-accent: #91a76a;
  --color-yellow: #f2eb87;
  --color-brown: #706549;
  --color-dark-surface: #2c2920;
  --color-dark-bg: #161512;
  --color-dark-card: #1b1f10;
  --color-dark-overlay: rgba(22, 21, 18, 0.88);
  --color-card-overlay: rgba(22, 21, 18, 0.78);
  --color-border: rgba(255, 255, 255, 0.12);
  --color-border-hover: rgba(145, 167, 106, 0.45);

  --font-heading: "Ibarra Real Nova", Georgia, serif;
  --font-body:
    "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --transition-normal: 0.3s ease;
  --transition-smooth: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max-width: 1240px;
}

/* --- Base / Reset --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--color-dark-bg);
  color: var(--color-text);
  font-family: var(--font-body);
}

body {
  background-color: var(--color-dark-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-normal);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --- Navigation Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 18px 0;
  transition:
    background-color var(--transition-normal),
    padding var(--transition-normal),
    backdrop-filter var(--transition-normal);
  background-color: transparent;
}

.site-header.scrolled {
  background-color: rgba(22, 21, 18, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 12px 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition-normal);
}

.brand-logo:hover img {
  transform: scale(1.03);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--color-primary);
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 4px;
  transition: color var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-yellow);
}

.nav-link svg {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-normal);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: rgba(27, 31, 16, 0.98);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 10px 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  z-index: 100;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-item:hover .nav-link svg {
  transform: rotate(180deg);
}

.dropdown-link {
  display: block;
  padding: 9px 20px;
  font-size: 0.9rem;
  color: var(--color-text);
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal);
}

.dropdown-link:hover {
  background-color: rgba(145, 167, 106, 0.15);
  color: var(--color-yellow);
}

/* Visit Store Button */
.btn-store {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #161512;
  background-color: var(--color-yellow);
  border-radius: 50px;
  border: 1px solid transparent;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 15px rgba(242, 235, 135, 0.25);
}

.btn-store:hover {
  background-color: transparent;
  color: var(--color-yellow);
  border-color: var(--color-yellow);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(242, 235, 135, 0.35);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  cursor: pointer;
  z-index: 1100;
}

.mobile-toggle span {
  display: block;
  height: 2.5px;
  width: 100%;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-8.5px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero-section {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: url("../images/hero-usu.jpg") center center / cover no-repeat;
  padding: 180px 0 100px;
  text-align: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at center,
    rgba(22, 21, 18, 0.82) 0%,
    rgba(22, 21, 18, 0.95) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
  font-weight: 600;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 500;
  line-height: 1.15;
  color: var(--color-primary);
  margin-bottom: 24px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
}

.hero-description {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--color-text);
  line-height: 1.8;
  max-width: 820px;
  margin: 0 auto 36px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

.hero-divider {
  width: 80px;
  height: 3px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-accent),
    transparent
  );
  margin: 0 auto;
}

/* --- Section Headers --- */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-kicker {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section-line {
  width: 70px;
  height: 3px;
  background: var(--color-accent);
  margin: 0 auto;
  border-radius: 2px;
}

/* --- Program Kerja (Flip Boxes) Section --- */
.programs-section {
  padding: 100px 0;
  background-color: var(--color-dark-bg);
  position: relative;
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* 3D Flip Card Container */
.flip-card {
  perspective: 1200px;
  height: 325px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform var(--transition-smooth);
  transform-style: preserve-3d;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Hover and active flip */
.flip-card:hover .flip-card-inner,
.flip-card.is-flipped .flip-card-inner {
  transform: rotateY(180deg);
}

/* Front & Back Faces */
.flip-card-front,
.flip-card-back {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-normal);
}

/* Front Styling */
.flip-card-front {
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.flip-card-front::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: rgba(22, 21, 18, 0.78);
  transition: background-color var(--transition-normal);
}

.flip-card:hover .flip-card-front::before {
  background-color: rgba(22, 21, 18, 0.65);
}

.flip-front-content {
  position: relative;
  z-index: 2;
  padding: 30px 24px;
}

.flip-card-title {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.25;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.9);
  margin-bottom: 12px;
}

.flip-hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-accent);
  opacity: 0.85;
  margin-top: 10px;
}

/* Back Styling */
.flip-card-back {
  transform: rotateY(180deg);
  background: radial-gradient(circle at center, #1b1f10 20%, #2a361d 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 32px 26px;
}

.flip-card-back .flip-card-title {
  font-size: 1.4rem;
  color: var(--color-yellow);
  margin-bottom: 12px;
}

.flip-card-desc {
  font-size: 0.875rem;
  font-weight: 300;
  line-height: 1.65;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 6;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.flip-card-btn {
  display: inline-block;
  margin-top: 16px;
  padding: 7px 18px;
  font-size: 0.8rem;
  font-weight: 500;
  color: #161512;
  background-color: var(--color-yellow);
  border-radius: 20px;
  transition: all var(--transition-normal);
}

.flip-card-btn:hover {
  background-color: #ffffff;
  transform: scale(1.05);
}

/* --- Susunan Pengurus (Team Members) Section --- */
.team-section {
  padding: 100px 0 120px;
  background-color: #11100d;
  position: relative;
  overflow: hidden;
}

.team-carousel-container {
  position: relative;
  margin-top: 40px;
}

.team-slider {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 20px 4px 40px;
  user-select: none;
  cursor: grab;
}

.team-slider:active {
  cursor: grabbing;
}

.team-slider::-webkit-scrollbar {
  display: none;
}

.team-card {
  flex: 0 0 calc(25% - 18px);
  min-width: 250px;
  background-color: #1a1916;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition:
    transform var(--transition-normal),
    border-color var(--transition-normal),
    box-shadow var(--transition-normal);
  text-align: center;
  padding-bottom: 24px;
}

.team-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-border-hover);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5);
}

.team-image-wrapper {
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background-color: #24221d;
  margin-bottom: 18px;
}

.team-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform var(--transition-smooth);
}

.team-card:hover .team-image-wrapper img {
  transform: scale(1.06);
}

.team-info {
  padding: 0 18px;
}

.team-name {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
  line-height: 1.25;
}

.team-position {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* Carousel Nav Buttons */
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 24px;
}

.carousel-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: #24221d;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.carousel-btn:hover {
  background-color: var(--color-accent);
  color: #161512;
  border-color: var(--color-accent);
  transform: scale(1.05);
}

.carousel-btn svg {
  width: 20px;
  height: 20px;
}

/* --- Footer --- */
.site-footer {
  background-color: #0e0d0b;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 80px 0 30px;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand img {
  height: 52px;
  width: auto;
  margin-bottom: 18px;
}

.footer-brand-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 380px;
  margin-bottom: 24px;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 14px;
}

.social-link {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: all var(--transition-normal);
}

.social-link:hover {
  background-color: var(--color-yellow);
  color: #161512;
  border-color: var(--color-yellow);
  transform: translateY(-3px);
}

.social-link svg {
  width: 16px;
  height: 16px;
}

.footer-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  color: var(--color-primary);
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 10px;
}

.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background-color: var(--color-accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link-item a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  transition:
    color var(--transition-normal),
    padding-left var(--transition-normal);
}

.footer-link-item a:hover {
  color: var(--color-yellow);
  padding-left: 6px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.contact-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
  margin-top: 3px;
  flex-shrink: 0;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* --- Back To Top Button --- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #161512;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 990;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-yellow);
  transform: translateY(-4px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* --- Responsive Breakpoints --- */
@media (max-width: 1024px) {
  .programs-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-card {
    flex: 0 0 calc(33.333% - 16px);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 14px 0;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 340px;
    height: 100vh;
    background-color: rgba(22, 21, 18, 0.98);
    backdrop-filter: blur(15px);
    flex-direction: column;
    align-items: flex-start;
    padding: 90px 30px 40px;
    gap: 20px;
    transition: right var(--transition-normal);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.8);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-menu.active {
    right: 0;
  }

  .mobile-toggle {
    display: flex;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    padding-left: 16px;
    box-shadow: none;
  }

  .header-actions {
    display: none;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-description {
    font-size: 0.95rem;
  }

  .programs-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }

  .team-card {
    flex: 0 0 calc(50% - 12px);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 2.2rem;
  }

  .team-card {
    flex: 0 0 100%;
  }
}