:root {
  --bg-main: #0a0b0e;
  --bg-secondary: #12141a;
  --bg-soft: #1a1d28;
  --bg-card: #1e2230;
  --accent: #6ce1b6;
  --accent-dark: #4bc999;
  --accent-glow: rgba(108, 225, 182, 0.15);
  --text-main: #e8eaef;
  --text-soft: #a8abb8;
  --text-muted: #6b6e7d;
  --border: #2a2e3f;
  --warning: #ffc107;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: "Nunito", sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6,
.nav-btn,
.os-tab-btn,
.btn-primary,
.btn-secondary,
.faq-item strong {
  font-family: "Inter", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}
/*a:hover {
  color: var(--accent);
}*/

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(18, 20, 26, 0.5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: space-between;
}

/* Logo text */
.nav-brand {
  display: none;
  font-family: "Calligraffitti", cursive;
  font-size: 1.5rem;
  padding: 0.5rem 1.5rem 0 1.5rem;
  color: var(--text-main);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 0rem 1.5rem 0 1.5rem;
  cursor: pointer;
}

.hamburger {
  width: 25px;
  height: 18px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger .bar {
  width: 100%;
  height: 3px;
  background-color: var(--text-main);
  border-radius: 3px;
  transition: all 0.3s ease-in-out;
}

.mobile-menu-btn.open .hamburger .bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
  background-color: var(--accent);
}

.mobile-menu-btn.open .hamburger .bar:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

.mobile-menu-btn.open .hamburger .bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
  background-color: var(--accent);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  width: 100%;
}

.nav button.nav-btn {
  background: transparent;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  white-space: nowrap;
  text-transform: uppercase;
  flex: 1;
}

.nav button.nav-btn:last-child {
  border-right: none;
}

.nav button.nav-btn::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav button.nav-btn:hover,
.nav button.nav-btn.active {
  color: var(--accent);
  background: var(--accent-glow);
}
.nav button.nav-btn.active::before {
  width: 100%;
}

/* View Manager */
.view {
  display: none;
  animation: fadeIn 0.5s ease forwards;
}
.view.active {
  display: block;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero Section */
.hero {
  position: relative;
  min-height: calc(100vh - 48px);
  background:
    linear-gradient(rgba(10, 11, 14, 0.6), rgba(10, 11, 14, 0.6)),
    url("hero.png") center / cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero h1 {
  position: relative;
  z-index: 2;
  font-family: "Calligraffitti", cursive;
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 400;
  color: var(--text-main);
  text-shadow:
    0 0 60px rgba(108, 225, 182, 0.3),
    0 10px 30px black;
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    text-shadow:
      0 0 40px rgba(108, 225, 182, 0.2),
      0 10px 30px rgba(0, 0, 0, 0.5);
  }
  to {
    text-shadow:
      0 0 60px rgba(108, 225, 182, 0.4),
      0 10px 30px rgba(0, 0, 0, 0.5);
  }
}

/* General Content Styles */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}
.container-alt {
  background: var(--bg-secondary);
}

h2.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 0.5rem;
  color: var(--text-main);
  font-weight: 700;
  position: relative;
  display: inline-block;
}
h2.section-title::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--accent);
}

p {
  color: var(--text-soft);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

/* Buttons */
.btn-primary,
.btn-secondary {
  padding: 1rem 2.5rem;
  font-weight: 600;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg-main);
  border: none;
  box-shadow: 0 10px 30px rgba(108, 225, 182, 0.2);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(108, 225, 182, 0.3);
}
.btn-secondary {
  background: transparent;
  color: var(--text-main);
  border: 2px solid var(--accent);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--accent-glow);
  transform: translateY(-3px);
}

button:disabled {
  background: var(--bg-soft);
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.5;
  box-shadow: none;
  border-color: var(--bg-soft);
}

.features-collage {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 220px;
  margin-top: 2rem;
}
.feature-item {
  position: relative;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.feature-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.feature-item:hover img {
  transform: scale(1.08);
}
.feature-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(
    to top,
    rgba(10, 11, 14, 0.95) 0%,
    rgba(10, 11, 14, 0.6) 60%,
    transparent 100%
  );
  padding: 2rem 1.5rem 1.5rem;
  transition: padding 0.3s ease;
}
.feature-item:hover .feature-overlay {
  padding-bottom: 2rem;
}
.feature-overlay h3 {
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 0.3rem;
  font-weight: 700;
}
.feature-overlay p {
  color: var(--text-main);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.4;
}
.feature-overlay-top {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(
    to bottom,
    rgba(10, 11, 14, 0.95) 0%,
    rgba(10, 11, 14, 0.6) 60%,
    transparent 100%
  );
  padding: 1.5rem 1.5rem 1.5rem;
  transition: padding 0.3s ease;
}
.feature-item:hover .feature-overlay-top {
  padding-top: 2rem;
}
.feature-overlay-top h3 {
  color: var(--accent);
  font-size: 1.2rem;
  margin-top: 0.3rem;
  font-weight: 700;
}
.feature-overlay-top p {
  color: var(--text-main);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.4;
}

.feat-large {
  grid-column: span 2;
  grid-row: span 2;
}
.feat-wide {
  grid-column: span 2;
  grid-row: span 1;
}
.feat-tall {
  grid-column: span 1;
  grid-row: span 2;
}

.open-source-section {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.oss-text {
  flex: 1;
}
.oss-text h2 {
  margin-bottom: 1rem;
  color: var(--text-main);
}
.oss-text p {
  font-size: 1.1rem;
  color: var(--text-soft);
  margin-bottom: 2rem;
}
.oss-img-wrapper {
  flex: 1;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}
.oss-img-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}

/* Gallery and Modal */
.gallery-hint {
  color: var(--accent);
  font-size: 0.9rem;
  margin-top: 1rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.screenshots {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.shot {
  background: var(--bg-card);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.4s ease;
  cursor: zoom-in;
} /* cursor diganti agar mengisyaratkan zoom */
.shot:hover {
  transform: translateY(-10px);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
  border-color: var(--accent);
}
.shot-img-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.shot p {
  padding: 1.5rem;
  margin-bottom: 0;
  font-size: 0.95rem;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 1;
  transition: opacity 0.3s ease;
}
.modal.hidden {
  opacity: 0;
  pointer-events: none;
}
.modal img {
  max-width: 90%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
  cursor: zoom-out;
}
.modal-close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: var(--text-main);
  font-size: 2.5rem;
  cursor: pointer;
  transition: color 0.2s;
}
.modal-close:hover {
  color: var(--accent);
}

/* Tabs Download */
.os-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
  gap: 1rem;
  overflow-x: auto;
}
.os-tab-btn {
  background: none;
  border: none;
  color: var(--text-soft);
  font-size: 1.1rem;
  font-weight: 600;
  padding: 1rem 2rem;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.3s;
}
.os-tab-btn:hover {
  color: var(--text-main);
}
.os-tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.os-content {
  display: none;
  animation: fadeIn 0.3s ease forwards;
}
.os-content.active {
  display: block;
}

.download-options {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

/* Guides */
.guide-box {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 2rem;
  border-radius: 8px;
  margin-top: 2rem;
}
.guide-box ol,
.guide-box ul {
  color: var(--text-soft);
  margin: 1rem 0 1.5rem 1.5rem;
}
.guide-box li {
  margin-bottom: 0.8rem;
  line-height: 1.7;
}
.warning-box {
  background: rgba(255, 193, 7, 0.08);
  border-left: 4px solid var(--warning);
  padding: 1.3rem;
  margin-top: 1rem;
  color: var(--text-main);
}

/* Lists Changelog and FAQ */
.list-section {
  background: var(--bg-card);
  padding: 2rem;
  border: 1px solid var(--border);
  margin-top: 2rem;
}
.list-section h3 {
  color: var(--accent);
  font-size: 1.3rem;
  margin: 2rem 0 1rem;
}
.list-section ul {
  list-style: none;
}
.list-section li {
  padding: 0.8rem 0 0.8rem 1.5rem;
  position: relative;
  border-bottom: 1px solid var(--border);
}
.list-section li:last-child {
  border-bottom: none;
}
.list-section li::before {
  content: "-";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.faq-item {
  background: var(--bg-card);
  padding: 2rem;
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
}
.faq-item:hover {
  border-color: var(--accent);
  box-shadow: 0 10px 30px rgba(108, 225, 182, 0.05);
}
.faq-item strong {
  color: var(--accent);
  font-size: 1.1rem;
  display: block;
}
.faq-item p {
  margin-bottom: 0;
}

.footer-note {
  text-align: center;
  padding: 4rem 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

@media (max-width: 900px) {
  .container {
    padding: 3rem 1.5rem;
  }
  .screenshots {
    grid-template-columns: 1fr;
  }
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
  .os-tab-btn {
    padding: 1rem;
    font-size: 1rem;
  }
  .hero {
    min-height: calc(50vh - 48px);
  }
  /* Mobile Navbar */
  .nav-brand {
    display: block;
  }
  .mobile-menu-btn {
    display: block;
    z-index: 102;
  }

  .nav-container {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: rgba(18, 20, 26, 0.95);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transition:
      max-height 0.4s ease-in-out,
      opacity 0.3s ease-in-out,
      visibility 0.4s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }

  .nav-container.open {
    max-height: 500px;
    opacity: 1;
    visibility: visible;
  }

  .nav button.nav-btn {
    width: 100%;
    text-align: left;
    padding: 1.2rem 1.5rem;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .nav button.nav-btn::before {
    bottom: auto;
    top: 0;
    left: 0;
    width: 3px;
    height: 0;
    transition: height 0.3s ease;
  }
  .nav button.nav-btn.active::before {
    height: 100%;
    width: 3px;
  }

  .features-collage {
    grid-template-columns: 1fr;
    grid-auto-rows: 250px;
  }
  .feat-large,
  .feat-wide,
  .feat-tall {
    grid-column: span 1;
    grid-row: span 1;
  }

  .open-source-section {
    flex-direction: column;
    gap: 2rem;
    margin-top: 4rem;
  }
}

@media (max-width: 600px) {
  .hero {
    min-height: calc(40vh - 48px);
  }
}