/* ==============================
   VARIABLES & RESET
   ============================== */
:root {
  --dark: #090d14;
  --text: #111827;
  --muted: #667085;
  --blue: #1857d7;
  --blue-light: #e8effe;
  --light: #f5f7fb;
  --line: #e6eaf0;
  --whatsapp: #25D366;
  --whatsapp-dark: #1ebe5d;
  --radius-card: 24px;
  --radius-btn: 999px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--text);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

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

/* ==============================
   HEADER
   ============================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 16px 6vw;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.brand {
  grid-column: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand img {
  width: 280px;
  height: auto;
  display: block;
}

nav {
  grid-column: 3;
  justify-self: end;
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  color: #344054;
}

.nav-cta {
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-btn);
  transition: background 0.2s, border-color 0.2s;
}

.nav-cta:hover {
  background: var(--light);
  border-color: #c4cdd8;
}

/* ==============================
   BUTTONS
   ============================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-btn);
  padding: 14px 24px;
  font-weight: 800;
  font-size: 15px;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
  cursor: pointer;
  border: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.btn:active {
  transform: translateY(0);
}

.primary {
  background: var(--blue);
  color: #fff;
}

.primary:hover {
  box-shadow: 0 8px 24px rgba(24, 87, 215, 0.35);
}

.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.whatsapp {
  background: var(--whatsapp);
  color: #fff;
}

.whatsapp:hover {
  background: var(--whatsapp-dark);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.35);
}

/* ==============================
   HERO
   ============================== */
.hero {
  min-height: 80vh;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 44px;
  align-items: center;
  padding: 90px 8vw;
  background:
    radial-gradient(circle at 88% 18%, rgba(24, 87, 215, 0.12), transparent 32%),
    linear-gradient(180deg, #fff 0%, #f8fafc 100%);
}

.eyebrow {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(40px, 5.5vw, 72px);
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--text);
}

.lead {
  max-width: 600px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.hero-card {
  background: var(--dark);
  color: #fff;
  border-radius: 32px;
  padding: 40px;
  box-shadow: 0 28px 72px rgba(9, 13, 20, 0.2);
}

.hero-card > span {
  color: #8fb2ff;
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero-card ul {
  list-style: none;
  margin-top: 20px;
}

.hero-card li {
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.04em;
}

/* ==============================
   STRIP
   ============================== */
.strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.strip div {
  padding: 28px 6vw;
  border-right: 1px solid var(--line);
}

.strip div:last-child {
  border-right: none;
}

.strip strong {
  display: block;
  font-size: 18px;
  margin-bottom: 4px;
}

.strip span {
  color: var(--muted);
  font-size: 14px;
}

/* ==============================
   SECTIONS — SHARED
   ============================== */
.section {
  padding: 92px 8vw;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-heading h2,
.section h2,
.cta-section h2 {
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-top: 0;
}

/* ==============================
   PROBLEMS SECTION
   ============================== */
.problems {
  background: var(--light);
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.problem-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.problem-icon {
  font-size: 32px;
  line-height: 1;
  margin-bottom: 4px;
}

.problem-card h3 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.problem-card > p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
  flex: 1;
}

.problem-answer {
  margin-top: 8px;
  padding: 16px;
  background: var(--blue-light);
  border-radius: 14px;
  font-size: 14px;
  color: #1a3a7a;
  line-height: 1.6;
}

.answer-label {
  display: block;
  font-weight: 800;
  color: var(--blue);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 6px;
}

/* ==============================
   SERVICES
   ============================== */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.cards article {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: #fff;
  transition: box-shadow 0.2s, transform 0.2s;
}

.cards article:hover {
  box-shadow: 0 12px 40px rgba(9, 13, 20, 0.08);
  transform: translateY(-3px);
}

.card-icon {
  font-size: 28px;
  margin-bottom: 14px;
}

.cards h3 {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.cards p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

/* ==============================
   METHOD / STEPS
   ============================== */
.dark {
  background: var(--dark);
  color: #fff;
}

.dark .section-heading h2 {
  color: #fff;
}

.dark .eyebrow {
  color: #8fb2ff;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.steps div {
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-card);
  background: rgba(255, 255, 255, 0.04);
}

.steps span {
  display: block;
  color: #8fb2ff;
  font-weight: 900;
  font-size: 28px;
  letter-spacing: -0.04em;
  margin-bottom: 10px;
}

.steps h3 {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}

.steps p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 15px;
  line-height: 1.65;
}

/* ==============================
   ABOUT / CHI SONO
   ============================== */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-text .section-heading,
.about-text > p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
  margin-top: 16px;
}

.about-text h2 {
  font-size: clamp(28px, 3.2vw, 46px);
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-top: 0;
}

/* Experience list */
.experience-list {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  border-left: 2px solid var(--line);
  padding-left: 24px;
}

.exp-item {
  display: flex;
  gap: 14px;
  position: relative;
}

.exp-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
  position: absolute;
  left: -31px;
  top: 4px;
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--blue);
}

.exp-dot--current {
  background: var(--whatsapp);
  box-shadow: 0 0 0 2px var(--whatsapp), 0 0 10px rgba(37, 211, 102, 0.4);
}

.exp-item > div strong {
  font-size: 15px;
  font-weight: 800;
  color: var(--text);
}

.exp-years {
  display: inline-block;
  margin-left: 8px;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

.exp-years--current {
  color: var(--whatsapp-dark);
  font-weight: 700;
}

.exp-desc {
  margin-top: 4px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

/* Badges */
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--light);
  border: 1px solid var(--line);
  border-radius: var(--radius-btn);
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

/* Photo */
.about-photo-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-photo {
  width: 320px;
  height: 380px;
  border-radius: 28px;
  object-fit: cover;
  object-position: center top;
  box-shadow: 0 24px 72px rgba(9, 13, 20, 0.16);
  display: block;
}

/* ==============================
   CTA SECTION
   ============================== */
.cta-section {
  text-align: center;
  padding: 100px 8vw;
  background: var(--dark);
  color: #fff;
}

.cta-section .eyebrow {
  color: #8fb2ff;
}

.cta-section h2 {
  max-width: 820px;
  margin: 0 auto;
  color: #fff;
}

.cta-section > p {
  font-size: 19px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 16px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-top: 36px;
}

/* ==============================
   FOOTER
   ============================== */
footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 6vw;
  background: #05080e;
  color: #9aa4b2;
  font-size: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ==============================
   FLOATING WHATSAPP BUTTON
   ============================== */
.wa-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 200;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--whatsapp);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 28px rgba(37, 211, 102, 0.45);
  transition: transform 0.2s, box-shadow 0.2s;
}

.wa-float:hover {
  transform: scale(1.1);
  box-shadow: 0 10px 36px rgba(37, 211, 102, 0.55);
}

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

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

@media (max-width: 768px) {
  nav {
    display: none;
  }

  .brand img {
    width: 150px;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 60px 6vw;
    min-height: auto;
  }

  .hero-card {
    padding: 28px;
  }

  .hero-card li {
    font-size: 20px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .strip {
    grid-template-columns: 1fr;
  }

  .strip div {
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .strip div:last-child {
    border-bottom: none;
  }

  .problems-grid {
    grid-template-columns: 1fr;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-photo-wrap {
    order: -1;
  }

  .about-photo {
    width: 100%;
    max-width: 340px;
    height: auto;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    object-position: center top;
  }

  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .cta-actions .btn {
    width: 100%;
    max-width: 360px;
  }

  footer {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .wa-float {
    bottom: 20px;
    right: 20px;
    width: 52px;
    height: 52px;
  }
}