/*
  ============================
  ZERO TUTORIAL LANDING PAGE
  ============================

  Catatan umum:
  - File ini mengatur tampilan visual website.
  - Kalau ingin mengubah warna utama, cek bagian :root.
  - Kalau ingin ubah lebar konten, cek class .container.
*/

:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-soft: #f1f3f8;
  --text: #111827;
  --muted: #5b6474;
  --line: #e5e7eb;
  --primary: #111827;
  --primary-contrast: #ffffff;
  --accent: #dbe4ff;
  --accent-strong: #2d4bdb;
  --success-soft: #e9f7ef;
  --shadow: 0 18px 48px rgba(17, 24, 39, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --container: 1160px;
}

/* Reset dasar agar tampilan konsisten di browser */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

/* Menghindari gambar / media melebihi lebar parent */
img {
  max-width: 100%;
  display: block;
}

/* Link default */
a {
  color: inherit;
  text-decoration: none;
}

/* Container pusat halaman */
.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

.narrow {
  width: min(100% - 32px, 900px);
  margin-inline: auto;
}

.max-680 {
  max-width: 680px;
  margin-inline: auto;
}

/* Utility section */
.section {
  padding: 88px 0;
}

.muted-section {
  background: linear-gradient(180deg, #f4f6fb 0%, #f8f9fc 100%);
}

.center {
  text-align: center;
}

.section-head {
  margin-bottom: 48px;
}

.section-label,
.eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.section-description {
  color: var(--muted);
  font-size: 1.05rem;
  margin-top: 12px;
}

/* =========================
   BUTTONS
   ========================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: 0.25s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  min-height: 42px;
  padding: 0 18px;
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-contrast);
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  background: #1f2937;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--line);
}

.btn-secondary:hover,
.btn-outline:hover {
  background: var(--surface-soft);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

/* =========================
   HEADER
   ========================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(247, 248, 251, 0.8);
  border-bottom: 1px solid rgba(229, 231, 235, 0.8);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: var(--primary-contrast);
  font-weight: 800;
  letter-spacing: 0.06em;
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 1rem;
}

.brand-text span {
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-menu a:not(.btn) {
  color: var(--muted);
  font-weight: 600;
}

.nav-menu a:not(.btn):hover {
  color: var(--text);
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
}

/* =========================
   HERO
   ========================= */
.hero {
  padding: 72px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  align-items: stretch;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero-copy h1 span {
  color: var(--accent-strong);
}

.hero-description {
  max-width: 760px;
  margin: 20px 0 0;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

.point {
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-weight: 600;
  font-size: 0.95rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 34px;
}

.trust-row div {
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.trust-row strong {
  display: block;
  font-size: 1.2rem;
}

.trust-row span {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Kartu penawaran utama di sisi kanan */
.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow);
  align-self: start;
}

.card-tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-strong);
  font-size: 0.88rem;
  font-weight: 700;
}

.hero-card h2 {
  margin: 0 0 16px;
  font-size: 1.75rem;
}

.feature-list,
.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li,
.pricing-features li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--muted);
}

.feature-list li::before,
.pricing-features li::before {
  content: "•";
  position: absolute;
  left: 10px;
  top: 0;
  color: var(--accent-strong);
  font-weight: 900;
}

.price-box {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 24px 0;
  padding: 18px;
  border-radius: var(--radius-lg);
  background: var(--surface-soft);
  border: 1px solid var(--line);
}

.price-label {
  display: block;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 700;
}

.price {
  display: block;
  margin-top: 4px;
  font-size: 2rem;
  line-height: 1.1;
}

.price-meta {
  text-align: right;
  display: grid;
  gap: 6px;
}

.old-price {
  color: var(--muted);
  text-decoration: line-through;
  font-size: 0.95rem;
}

.seat-info {
  font-size: 0.92rem;
  color: var(--accent-strong);
  font-weight: 700;
}

/* =========================
   INFO / PROBLEM / SOLUTION
   ========================= */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 30px;
}

.info-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.info-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.info-card p {
  margin: 0;
  color: var(--muted);
}

.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: start;
}

.stack-list {
  display: grid;
  gap: 16px;
}

.stack-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.stack-item strong {
  display: block;
  margin-bottom: 6px;
}

.stack-item span {
  color: var(--muted);
}

/* =========================
   PRICING
   ========================= */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.pricing-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: 0 10px 28px rgba(17, 24, 39, 0.04);
}

.pricing-card.featured {
  border: 2px solid var(--accent-strong);
  box-shadow: 0 20px 50px rgba(45, 75, 219, 0.12);
}

.featured-ribbon {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent-strong);
  color: white;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.pricing-kicker {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
}

.pricing-header h3 {
  margin: 0;
  font-size: 1.5rem;
}

.pricing-subtitle {
  color: var(--muted);
  margin: 10px 0 0;
}

.pricing-price {
  display: grid;
  gap: 8px;
  margin: 24px 0;
}

.pricing-price strong {
  font-size: 2rem;
  line-height: 1.1;
}

.badge {
  display: inline-flex;
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.82rem;
}

.badge-soft {
  background: var(--surface-soft);
  color: var(--text);
}

.badge-primary {
  background: var(--accent-strong);
  color: white;
}

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

.pricing-note {
  color: var(--muted);
  margin: 18px 0 22px;
}

.value-stack {
  margin: 18px 0 22px;
  background: #eef3ff;
  border: 1px solid #d8e2ff;
  border-radius: var(--radius-lg);
  padding: 16px;
}

.value-stack p {
  margin: 0;
}

.value-stack p + p {
  margin-top: 6px;
}

/* =========================
   MENTOR
   ========================= */
/* =========================
   MENTOR
   ========================= */
.mentor-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 24px;
  align-items: stretch;
}

.mentor-profile-card,
.mentor-stats-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.mentor-profile-card {
  padding: 28px;
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

.mentor-media {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-rows: 1fr 1fr;
  gap: 14px;
  min-height: 360px;
}

.mentor-photo {
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  box-shadow: 0 14px 34px rgba(17, 24, 39, 0.08);
}

.mentor-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.photo-main {
  grid-row: 1 / span 2;
  min-height: 360px;
}

.photo-top,
.photo-bottom {
  min-height: 172px;
}

.mentor-copy h2 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 2vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.mentor-copy p {
  margin: 0;
  color: var(--muted);
}

.mentor-copy p + p {
  margin-top: 14px;
}

.mentor-intro {
  font-size: 1.02rem;
  color: var(--text) !important;
}

.mentor-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.mentor-badges span {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 0.92rem;
  font-weight: 600;
}

.mentor-stats-panel {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.mentor-stats-panel h3 {
  margin: 0 0 18px;
  font-size: 1.25rem;
  line-height: 1.3;
}

.mentor-mini-stats {
  grid-template-columns: 1fr;
  gap: 12px;
}

.mentor-mini-stats div {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.mentor-mini-stats strong {
  display: block;
  font-size: 1.02rem;
  margin-bottom: 4px;
}

.mentor-mini-stats span {
  color: var(--muted);
  font-size: 0.94rem;
}

@media (max-width: 1080px) {
  .mentor-showcase {
    grid-template-columns: 1fr;
  }

  .mentor-profile-card {
    grid-template-columns: 1fr;
  }

  .mentor-media {
    min-height: auto;
  }
}

@media (max-width: 820px) {
  .mentor-profile-card,
  .mentor-stats-panel {
    padding: 22px;
  }

  .mentor-media {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    min-height: auto;
  }

  .photo-main {
    grid-column: 1 / -1;
    grid-row: auto;
    min-height: 260px;
  }

  .photo-top,
  .photo-bottom {
    min-height: 150px;
  }
}
/* =========================
   FAQ
   ========================= */
.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin: 12px 0 0;
  color: var(--muted);
}

/* =========================
   CTA
   ========================= */
.cta-section {
  padding-top: 30px;
  padding-bottom: 92px;
}

.cta-box {
  background: var(--primary);
  color: white;
  text-align: center;
  border-radius: 34px;
  padding: 52px 28px;
  box-shadow: var(--shadow);
}

.cta-box .section-label {
  color: #bcd0ff;
}

.cta-box p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 720px;
  margin: 0 auto;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.cta-box .btn-primary {
  background: white;
  color: var(--primary);
}

.cta-box .btn-secondary {
  background: transparent;
  color: white;
  border-color: rgba(255, 255, 255, 0.22);
}

.cta-box .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
}

.cta-footnote {
  margin-top: 16px !important;
  font-size: 0.92rem;
}

/* =========================
   FOOTER
   ========================= */
.site-footer {
  padding: 28px 0 42px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  color: var(--muted);
}

.footer-content p {
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a:hover {
  color: var(--text);
}

/* =========================
   RESPONSIVE
   ========================= */
@media (max-width: 1080px) {
  .hero-grid,
  .solution-grid,
  .mentor-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .featured-ribbon {
    position: static;
    width: fit-content;
    margin-bottom: 12px;
  }
}

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-menu {
    position: absolute;
    left: 16px;
    right: 16px;
    top: calc(100% + 10px);
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
    padding: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-menu.open {
    display: flex;
  }

  .trust-row,
  .problem-grid,
  .mini-stats {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 74px 0;
  }

  .hero {
    padding-top: 42px;
  }

  .hero-card,
  .pricing-card,
  .mentor-card,
  .stats-card,
  .info-card,
  .stack-item {
    padding: 22px;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }
}