/* ============================================
   Karya Semestaraya — Design System
   ============================================ */

:root,
[data-theme="dark"] {
  --bg: #070e18;
  --bg-elevated: #0c1624;
  --bg-card: #122033;
  --line: #1e334d;
  --line-soft: #2a4a6e;
  --text: #e8eef6;
  --text-muted: #8ba3bc;
  --brand: #3b8fe8;
  --brand-strong: #2f7fd4;
  --brand-soft: rgba(59, 143, 232, 0.16);
  --warm: #c4783a;
  --warm-soft: rgba(196, 120, 58, 0.18);
  --btn-text: #041018;
  --illust-fill: #0b1a2e;
  --header-bg: rgba(7, 14, 24, 0.78);
  --header-bg-solid: rgba(7, 14, 24, 0.94);
  --noise-opacity: 0.035;

  --font-display: "Outfit", system-ui, sans-serif;
  --font-body: "Plus Jakarta Sans", system-ui, sans-serif;

  --container: 1160px;
  --radius: 12px;
  --header-h: 76px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] {
  --bg: #f4f7fb;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --line: #d5e0ec;
  --line-soft: #b7c9dc;
  --text: #102033;
  --text-muted: #5a718a;
  --brand: #2f7fd4;
  --brand-strong: #246bb8;
  --brand-soft: rgba(47, 127, 212, 0.12);
  --warm: #b56a2f;
  --warm-soft: rgba(181, 106, 47, 0.12);
  --btn-text: #ffffff;
  --illust-fill: #e8f1fa;
  --header-bg: rgba(244, 247, 251, 0.82);
  --header-bg-solid: rgba(255, 255, 255, 0.95);
  --noise-opacity: 0.02;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background 0.35s ease, color 0.35s ease;
}

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

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

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

button {
  font: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
  font-weight: 700;
  color: var(--text);
}

h1 {
  font-size: clamp(1.85rem, 3.6vw, 2.85rem);
  font-weight: 800;
}

.hero h1 {
  font-size: clamp(1.85rem, 3.4vw, 2.75rem);
  max-width: 18ch;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.75rem);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.4em;
}

p {
  margin: 0 0 1em;
  color: var(--text-muted);
}

p:last-child {
  margin-bottom: 0;
}

strong {
  color: var(--text);
  font-weight: 600;
}

.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: var(--noise-opacity);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Illustrations */

.illust-panel {
  fill: var(--illust-fill);
}

.illust-stroke {
  stroke: var(--line-soft);
  fill: none;
}

.illust-accent {
  stroke: var(--brand);
  fill: none;
}

.illust-muted {
  stroke: var(--text);
  fill: none;
}

.illust-ground {
  fill: var(--line);
}

path.illust-stroke[fill],
rect.illust-stroke {
  fill: var(--illust-fill);
}

/* ---------- Buttons & controls ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease), border-color 0.35s var(--ease), color 0.35s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--brand);
  color: var(--btn-text);
}

.btn-primary:hover {
  background: var(--brand-strong);
}

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

.btn-ghost:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.btn-lg {
  padding: 1rem 1.75rem;
  font-size: 1.05rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: var(--bg-elevated);
}

.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--text-muted);
  padding: 0.45rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease;
}

.lang-switch button.is-active {
  background: var(--brand);
  color: var(--btn-text);
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.25s ease, color 0.25s ease, background 0.25s ease;
}

.icon-btn:hover {
  border-color: var(--brand);
  color: var(--brand);
}

[data-theme="dark"] .icon-sun {
  display: block;
}

[data-theme="dark"] .icon-moon {
  display: none;
}

[data-theme="light"] .icon-sun {
  display: none;
}

[data-theme="light"] .icon-moon {
  display: block;
}

.auth-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
}

.btn-auth {
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  transform: none;
}

.btn-auth:hover {
  transform: none;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-h);
  backdrop-filter: blur(16px);
  background: var(--header-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: var(--header-bg-solid);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-right: auto;
}

.brand-logo {
  width: 40px;
  height: auto;
  flex-shrink: 0;
  object-fit: contain;
  background: transparent;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.brand-text small {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.25s ease;
}

.nav a:hover,
.nav a.is-active {
  color: var(--text);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease);
}

body.nav-open .nav-toggle span:first-child {
  transform: translateY(4px) rotate(45deg);
}

body.nav-open .nav-toggle span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--line-soft) 35%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--line-soft) 35%, transparent) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 75%);
}

.hero-glow {
  position: absolute;
  width: 60vw;
  height: 50vw;
  top: -10%;
  right: -10%;
  background: radial-gradient(circle, var(--brand-soft), transparent 65%);
  filter: blur(20px);
}

.hero-inner {
  position: relative;
  flex: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2rem;
  align-items: center;
  padding: 4rem 0 3rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 1rem;
}

.lead {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  max-width: 36rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-illust {
  width: min(100%, 520px);
  filter: drop-shadow(0 24px 50px color-mix(in srgb, var(--text) 12%, transparent));
}

.pulse-win {
  animation: pulseWin 3.5s ease-in-out infinite;
}

.pulse-win.delay-1 {
  animation-delay: 0.8s;
}

.pulse-win.delay-2 {
  animation-delay: 1.6s;
}

@keyframes pulseWin {
  0%,
  100% {
    opacity: 0.15;
  }
  50% {
    opacity: 0.45;
  }
}

.ripple {
  animation: ripple 3s ease-out infinite;
  transform-origin: center;
}

.ripple.delay-1 {
  animation-delay: 1.5s;
}

@keyframes ripple {
  0% {
    r: 8;
    opacity: 0.8;
  }
  100% {
    r: 36;
    opacity: 0;
  }
}

.marquee {
  position: relative;
  border-block: 1px solid var(--line);
  background: var(--bg-elevated);
  overflow: hidden;
  padding: 1rem 0;
}

.marquee-track {
  display: flex;
  gap: 1.5rem;
  width: max-content;
  animation: marquee 28s linear infinite;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.marquee-track span:nth-child(even) {
  color: var(--brand);
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

/* ---------- Sections ---------- */

.section {
  padding: 6.5rem 0;
}

.section-head {
  max-width: 40rem;
  margin: 0 auto 3.5rem;
  text-align: center;
}

.section-head-left {
  margin-left: 0;
  text-align: left;
}

.section-desc {
  margin-top: 0.75rem;
}

.works {
  background:
    radial-gradient(ellipse 50% 40% at 10% 20%, var(--brand-soft), transparent),
    var(--bg);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.work-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.work-item:hover {
  border-color: var(--line-soft);
  transform: translateY(-4px);
}

[data-theme="light"] .work-item {
  box-shadow: 0 8px 24px rgba(16, 32, 51, 0.04);
}

.work-visual {
  aspect-ratio: 5 / 3;
  overflow: hidden;
  background: var(--illust-fill);
}

.work-visual svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-item > *:not(.work-visual) {
  padding-inline: 1.4rem;
}

.work-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.work-item h3 {
  margin-top: 0.5rem;
}

.work-item p {
  padding-bottom: 1.4rem;
  font-size: 0.95rem;
}

.about-teaser {
  background: var(--bg-elevated);
  border-block: 1px solid var(--line);
}

.about-teaser-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.about-teaser-copy .btn {
  margin-top: 1.5rem;
}

.services-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.service-row {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 1.75rem;
  align-items: center;
  padding: 1.5rem 0.5rem;
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease, padding-left 0.35s var(--ease);
}

.service-row-detailed {
  align-items: start;
  padding-top: 1.75rem;
  padding-bottom: 1.75rem;
}

.service-row-detailed .service-arrow {
  margin-top: 1.5rem;
}

.service-row:hover {
  background: var(--brand-soft);
  padding-left: 1rem;
}

.service-illust {
  width: 120px;
  height: 96px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg-card);
  overflow: hidden;
  flex-shrink: 0;
  transition: border-color 0.3s ease, transform 0.35s var(--ease);
}

.service-illust svg {
  width: 100%;
  height: 100%;
}

.service-row:hover .service-illust {
  border-color: var(--brand);
  transform: translateY(-2px);
}

.service-body p {
  margin: 0;
  max-width: 44rem;
}

.service-points {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  max-width: 46rem;
  display: grid;
  gap: 0.65rem;
}

.service-points li {
  position: relative;
  padding-left: 1.15rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.service-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.service-arrow {
  font-size: 1.5rem;
  color: var(--brand);
  transition: transform 0.35s var(--ease);
}

.service-row:hover .service-arrow {
  transform: translateX(6px);
}

.partner-slots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.partner-slot {
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-card), transparent);
}

.partner-num {
  display: block;
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--brand);
  margin-bottom: 1rem;
}

.cta-section {
  position: relative;
  background:
    radial-gradient(ellipse 60% 80% at 80% 50%, var(--warm-soft), transparent),
    radial-gradient(ellipse 50% 70% at 10% 50%, var(--brand-soft), transparent),
    var(--bg);
}

.cta-inner {
  text-align: center;
  max-width: 42rem;
  margin-inline: auto;
}

.cta-copy .btn {
  margin-top: 1.5rem;
}

.cta-email {
  display: inline-block;
  margin-top: 1.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 700;
  color: var(--brand);
  word-break: break-all;
  transition: color 0.25s ease;
}

.cta-email:hover {
  color: var(--brand-strong);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 4rem 0 2rem;
  background: var(--bg-elevated);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  margin-top: 1rem;
  max-width: 22rem;
  font-size: 0.95rem;
}

.site-footer h4 {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 1rem;
}

.site-footer li + li {
  margin-top: 0.55rem;
}

.site-footer a {
  color: var(--text-muted);
  transition: color 0.25s ease;
}

.site-footer a:hover {
  color: var(--brand);
}

.site-footer span {
  color: var(--text-muted);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
}

.footer-bottom p {
  font-size: 0.85rem;
  margin: 0;
}

/* ---------- About page ---------- */

.page-hero {
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse 50% 60% at 70% 0%, var(--brand-soft), transparent),
    var(--bg);
}

.page-hero-inner {
  max-width: 48rem;
}

.story {
  padding-top: 4rem;
}

.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.story-block {
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-card);
}

.about-full-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: center;
  padding: 2.5rem;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, var(--brand-soft), transparent 40%),
    var(--bg-card);
}

.about-full-copy p + p {
  margin-top: 1rem;
}

.pillars {
  background: var(--bg-elevated);
  border-block: 1px solid var(--line);
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.pillar {
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg);
}

.pillar-icon {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 1rem;
}

.approach-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.approach-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--line);
}

.approach-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--warm);
}

/* ---------- Reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 {
  transition-delay: 0.12s;
}

.reveal-delay-2 {
  transition-delay: 0.24s;
}

.reveal-delay-3 {
  transition-delay: 0.36s;
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .marquee-track,
  .pulse-win,
  .ripple {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .hero-inner,
  .about-teaser-inner,
  .about-full-card,
  .story-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .hero-illust {
    width: min(100%, 380px);
  }

  .works-grid,
  .partner-slots,
  .pillar-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .service-row {
    grid-template-columns: 88px 1fr;
    gap: 1rem;
  }

  .service-illust {
    width: 88px;
    height: 72px;
  }

  .service-arrow {
    display: none;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem 1.25rem 1.5rem;
    background: var(--header-bg-solid);
    border-bottom: 1px solid var(--line);
  }

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

  .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
  }

  .header-cta {
    display: none;
  }

  .btn-auth {
    padding: 0.45rem 0.75rem;
    font-size: 0.78rem;
  }

  .nav-toggle {
    display: flex;
  }

  .brand-text {
    display: none;
  }

  .section {
    padding: 4.5rem 0;
  }
}

@media (min-width: 700px) and (max-width: 960px) {
  .works-grid {
    grid-template-columns: 1fr 1fr;
  }

  .partner-slots,
  .pillar-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .brand-text {
    display: flex;
  }
}

@media (max-width: 480px) {
  .header-controls .lang-switch button {
    padding: 0.4rem 0.55rem;
  }
}