/* ============================================
   style.css - TechInfo
   Versi Lebih Hidup, Berwarna, & Menarik
   ============================================ */

/* ---------- CSS VARIABLES ---------- */
:root {
  --primary: #8b9cff;
  --primary-dark: #6878e6;
  --primary-light: #c0c8ff;
  --secondary: #090d16;
  --accent-1: #d8ad61;
  --accent-2: #d58aa4;
  --accent-3: #59c5b5;
  --gradient-hero: linear-gradient(135deg, #080c14 0%, #11192a 52%, #1c2440 100%);
  --gradient-card: linear-gradient(145deg, #171e2d, #101620);
  --bg-body: #0b0f17;
  --text-dark: #edf1fb;
  --text-muted: #a4afc3;
  --white: #f5f7fc;
  --surface: #151c2a;
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.34);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --radius: 20px;
  --transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- RESET ---------- */
html {
  scroll-behavior: smooth;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-body);
  color: var(--text-dark);
  line-height: 1.7;
  min-height: 100vh;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  text-decoration: none;
  color: inherit;
}

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

/* ---------- SCROLL BAR ---------- */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: #111722;
}
::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ---------- PAGE TARGET ---------- */
.page-target {
  display: none;
  animation: fadeSlideUp 0.5s ease;
}

.page-target:target {
  display: block;
}

body:not(:has(.page-target:target)) #page-home,
#page-home:target {
  display: block;
}

@keyframes fadeSlideUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  background: rgba(11, 15, 23, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 30px rgba(99, 102, 241, 0.08);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 2px solid rgba(99, 102, 241, 0.10);
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.logo {
  font-size: 1.7rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  position: relative;
}

.nav-menu {
  display: flex;
  gap: 28px;
  font-weight: 600;
}

.nav-menu a {
  color: var(--text-muted);
  transition: all var(--transition);
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent-2));
  border-radius: 10px;
  transition: width var(--transition);
}

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

.nav-menu a:hover::after {
  width: 100%;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  background: var(--gradient-hero);
  color: var(--white);
  padding: 80px 0 90px;
  text-align: center;
  border-radius: 0 0 50px 50px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.20), transparent 70%);
  border-radius: 50%;
  animation: floatBubble 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.15), transparent 70%);
  border-radius: 50%;
  animation: floatBubble 10s ease-in-out infinite reverse;
}

@keyframes floatBubble {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #ffffff, var(--primary-light), var(--accent-1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.2rem;
  max-width: 520px;
  margin: 0 auto 32px;
  opacity: 0.85;
  font-weight: 300;
}

.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  padding: 14px 42px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.05rem;
  transition: all var(--transition);
  border: none;
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.35);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.20), transparent);
  transition: left 0.6s;
}

.btn:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 48px rgba(99, 102, 241, 0.45);
}

.btn:hover::before {
  left: 100%;
}

/* ============================================
   INFORMASI
   ============================================ */
.informasi {
  padding: 50px 0 60px;
  scroll-margin-top: 90px;
}

.informasi:target,
.tentang:target {
  animation: sectionReveal 0.7s ease both;
}

@keyframes sectionReveal {
  from {
    opacity: 0.35;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .informasi:target,
  .tentang:target {
    animation: none;
  }
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  color: var(--text-dark);
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent-2));
  border-radius: 10px;
  margin: 12px auto 0;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 40px;
  font-size: 1.05rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}

.card {
  background: var(--gradient-card);
  padding: 32px 24px 34px;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(99, 102, 241, 0.08);
  transition: all var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent-2), var(--accent-3));
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover::before {
  opacity: 1;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-md);
  border-color: rgba(99, 102, 241, 0.20);
}

.card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
}

.card h3 span {
  display: block;
  font-size: 2.5rem;
  margin-bottom: 6px;
}

.card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex: 1;
  line-height: 1.7;
}

.btn-card {
  display: inline-block;
  align-self: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  padding: 8px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.25);
}

.btn-card:hover {
  transform: scale(1.06) translateY(-2px);
  box-shadow: 0 8px 28px rgba(99, 102, 241, 0.35);
}

/* Warna berbeda tiap card */
.card:nth-child(1) .btn-card {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.30);
}
.card:nth-child(2) .btn-card {
  background: linear-gradient(135deg, #14b8a6, #06b6d4);
  box-shadow: 0 4px 16px rgba(20, 184, 166, 0.30);
}
.card:nth-child(3) .btn-card {
  background: linear-gradient(135deg, #f59e0b, #f97316);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.30);
}
.card:nth-child(4) .btn-card {
  background: linear-gradient(135deg, #ec4899, #f43f5e);
  box-shadow: 0 4px 16px rgba(236, 72, 153, 0.30);
}

.card:nth-child(1):hover {
  border-color: #8b5cf6;
}
.card:nth-child(2):hover {
  border-color: #14b8a6;
}
.card:nth-child(3):hover {
  border-color: #f59e0b;
}
.card:nth-child(4):hover {
  border-color: #ec4899;
}

/* ============================================
   TENTANG
   ============================================ */
.tentang {
  background: linear-gradient(135deg, #111722, #0d131e);
  padding: 60px 0;
  scroll-margin-top: 90px;
  border-top: 1px solid rgba(99, 102, 241, 0.06);
  border-bottom: 1px solid rgba(99, 102, 241, 0.06);
}

.tentang-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.tentang-content h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tentang-content p {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.9;
}

/* ============================================
   DETAIL PAGE
   ============================================ */
.detail-page {
  padding: 28px 0 60px;
  min-height: 70vh;
}

.detail-page .container {
  max-width: 1320px;
}

.detail-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 36px 42px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(99, 102, 241, 0.06);
  transition: box-shadow var(--transition);
  overflow: hidden;
}

.detail-card:hover {
  box-shadow: var(--shadow-md);
}

.detail-card h1 {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--primary), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.detail-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px dashed #2b3548;
}

.detail-intro {
  display: grid;
  grid-template-columns: minmax(0, 48%) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  margin-bottom: 28px;
}

.detail-intro h2 {
  margin-top: 0;
}

.detail-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(99, 102, 241, 0.06);
}

.detail-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 30px 0 12px;
  color: var(--text-dark);
}

.detail-card p {
  font-size: 1.04rem;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 16px;
}

.detail-card strong {
  color: var(--text-dark);
}

.detail-card .btn {
  margin-top: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--secondary);
  color: #94a3b8;
  text-align: center;
  padding: 28px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer p {
  font-size: 0.95rem;
}

.footer p::before {
  content: '💡 ';
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablet */
@media (max-width: 768px) {
  .nav-wrapper {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  .nav-menu {
    gap: 20px;
  }

  .hero-content h1 {
    font-size: 2.4rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero {
    padding: 60px 0 70px;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .detail-card {
    padding: 28px 24px;
  }

  .detail-intro {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .detail-card h1 {
    font-size: 1.8rem;
  }
}

/* HP */
@media (max-width: 480px) {
  .nav-menu {
    gap: 14px;
    font-size: 0.85rem;
  }

  .logo {
    font-size: 1.4rem;
  }

  .hero {
    padding: 50px 0 60px;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-content p {
    font-size: 0.95rem;
    padding: 0 10px;
  }

  .btn {
    padding: 12px 30px;
    font-size: 0.95rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .card {
    padding: 24px 18px;
  }

  .tentang-content h2 {
    font-size: 1.4rem;
  }

  .tentang-content p {
    font-size: 0.95rem;
  }

  .detail-card {
    padding: 20px 16px;
  }

  .detail-card h1 {
    font-size: 1.4rem;
  }

  .detail-card h2 {
    font-size: 1.2rem;
  }

  .detail-card p {
    font-size: 0.95rem;
  }

  .detail-img {
    width: 100%;
    border-radius: 12px;
  }
}

/* ---------- ANIMASI KETIKA SCROLL (opsional) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .card {
    animation: cardAppear 0.6s ease both;
    animation-delay: calc(var(--i, 0) * 0.1s);
  }
  .card:nth-child(1) { --i: 0; }
  .card:nth-child(2) { --i: 1; }
  .card:nth-child(3) { --i: 2; }
  .card:nth-child(4) { --i: 3; }

  @keyframes cardAppear {
    0% {
      opacity: 0;
      transform: translateY(40px) scale(0.95);
    }
    100% {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }
}