/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --color-primary: #2563EB;
  --color-accent: #1D4ED8;
  --color-primary-light: #EFF6FF;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAFC;
  --color-text: #1E293B;
  --color-text-secondary: #64748B;
  --color-border: #E2E8F0;
  --color-white: #FFFFFF;
  --color-error: #DC2626;

  --font-family: 'Inter', sans-serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --container-max: 1200px;
  --container-pad: 1.5rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --border-base: 1px solid var(--color-border);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  --navbar-height: 68px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: 1.6;
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

section {
  scroll-margin-top: var(--navbar-height);
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-20);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* ============================================================
   TYPOGRAPHY COMPONENTS
   ============================================================ */
.eyebrow {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.section-header {
  margin-bottom: var(--space-12);
  max-width: 680px;
}

.section-header--center {
  text-align: center;
  margin-inline: auto;
}

.section-header__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
}

.section-header__desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-top: var(--space-4);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  line-height: 1;
  white-space: nowrap;
}

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

.btn--primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

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

.btn--outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

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

.btn--white:hover {
  background-color: var(--color-primary-light);
}

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

.btn--white-outline:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background-color: var(--color-white);
  border: var(--border-base);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: border-color var(--transition-base);
}

.card:hover {
  border-color: var(--color-primary);
}

.card__icon {
  width: 44px;
  height: 44px;
  background-color: var(--color-primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: var(--space-4);
}

.card__title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: var(--border-base);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: var(--navbar-height);
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.navbar__logo-mark {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 700;
  font-family: 'Courier New', Courier, monospace;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  letter-spacing: 0;
}

.navbar__logo-name {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.navbar__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
}

.navbar__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.navbar__hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}

.navbar__hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   BACKGROUND SHAPES
   ============================================================ */
.bg-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

/* Hero canvas particle network */
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* CTA tech SVG shapes */
.cta-shape {
  position: absolute;
  pointer-events: none;
}

.cta-shape-1 {
  width: 380px;
  height: 440px;
  left: -130px;
  bottom: -160px;
  opacity: 0.07;
  animation: shape-float 12s ease-in-out infinite;
}

.cta-shape-2 {
  width: 180px;
  height: 180px;
  right: 60px;
  top: -50px;
  opacity: 0.18;
  animation: shape-float 7s ease-in-out infinite reverse;
}

.cta-shape-3 {
  width: 70px;
  height: 80px;
  right: 280px;
  bottom: 30px;
  opacity: 0.1;
  animation: shape-float 9s ease-in-out infinite;
}

/* Process section circuit grid */
#proses {
  background-image:
    radial-gradient(circle, rgba(37, 99, 235, 0.22) 1.5px, transparent 1.5px),
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
}

@keyframes shape-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-18px); }
}

/* ============================================================
   FADE-IN ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  will-change: opacity, transform;
}

.fade-in.is-visible {
  animation: fadeInUp 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.fade-in[data-delay="1"].is-visible { animation-delay: 80ms; }
.fade-in[data-delay="2"].is-visible { animation-delay: 160ms; }
.fade-in[data-delay="3"].is-visible { animation-delay: 240ms; }

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
  }
  .fade-in.is-visible {
    animation: none;
  }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background-color: var(--color-bg-alt);
  padding-block: var(--space-24);
  position: relative;
  overflow: hidden;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: 760px;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.15;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-top: var(--space-6);
  max-width: 620px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

.trust-tag {
  background-color: var(--color-white);
  border: var(--border-base);
  border-radius: 100px;
  padding: var(--space-1) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.about__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
  margin-top: var(--space-3);
}

.about__desc {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-top: var(--space-4);
}

.about__highlights {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: 1.6;
}

.highlight-check {
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.about__visual {
  position: sticky;
  top: calc(var(--navbar-height) + var(--space-6));
}

.about__stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.stat-tile {
  background-color: var(--color-white);
  border: var(--border-base);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.stat-tile--wide {
  grid-column: span 2;
}

.stat-tile__num {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat-tile__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ============================================================
   PROCESS
   ============================================================ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.process-step {
  background-color: var(--color-white);
  border: var(--border-base);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: border-color var(--transition-base);
}

.process-step:hover {
  border-color: var(--color-primary);
}

.process-step__number {
  display: inline-flex;
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-base);
  margin-bottom: var(--space-4);
  flex-shrink: 0;
}

.process-step__title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.process-step__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================================
   PORTFOLIO
   ============================================================ */
.portfolio-card {
  border-top: 4px solid var(--color-primary);
}

.portfolio-card__category {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.portfolio-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.portfolio-card__desc {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.portfolio-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  background-color: var(--color-primary);
  padding-block: var(--space-20);
  position: relative;
  overflow: hidden;
}

.cta-section > .container {
  position: relative;
  z-index: 1;
}

.cta-section__inner {
  text-align: center;
  max-width: 700px;
  margin-inline: auto;
}

.cta-section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.2;
}

.cta-section__desc {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.75;
  margin-top: var(--space-4);
}

.cta-section__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-8);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--space-12);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  background-color: var(--color-white);
  border: var(--border-base);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.contact-card__icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background-color: var(--color-primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-card__body {
  flex: 1;
  min-width: 0;
}

.contact-card__title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.contact-card__subtitle {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.contact-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-3);
}

/* ============================================================
   CONTACT FORM
   ============================================================ */
.contact-form-box {
  background-color: var(--color-white);
  border: var(--border-base);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.contact-form-box__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.contact-form-box__desc {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-row--half {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-field label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-field input,
.form-field textarea,
.form-field select {
  border: var(--border-base);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
  appearance: auto;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-field input.invalid,
.form-field textarea.invalid,
.form-field select.invalid {
  border-color: var(--color-error);
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
}

.required {
  color: var(--color-error);
}

.field-error {
  font-size: var(--font-size-sm);
  color: var(--color-error);
  display: block;
  min-height: 1.2em;
}

.form-submit {
  width: 100%;
  margin-top: var(--space-2);
}

.form-success {
  text-align: center;
  padding: var(--space-12) var(--space-8);
}

.form-success__icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--space-4);
}

.form-success h4 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-success p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background-color: var(--color-text);
  padding-block: var(--space-8);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__company-name {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
}

.footer__copy {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.45);
}

/* ============================================================
   RESPONSIVE — Tablet landscape (< 1024px)
   ============================================================ */
@media (max-width: 1023px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .navbar__logo-name {
    display: none;
  }
}

/* ============================================================
   RESPONSIVE — Tablet portrait (< 900px)
   ============================================================ */
@media (max-width: 899px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .about__inner {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .about__visual {
    position: static;
  }
}

/* ============================================================
   RESPONSIVE — Mobile (< 768px)
   ============================================================ */
@media (max-width: 767px) {
  .navbar__nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    position: absolute;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: var(--border-base);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
    padding: 0;
  }

  .navbar__nav.is-open {
    max-height: 420px;
    padding: var(--space-4) 0;
  }

  .navbar__link {
    padding: var(--space-3) var(--space-6);
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .navbar__link:hover,
  .navbar__link.active {
    border-bottom-color: transparent;
    border-left-color: var(--color-primary);
    background-color: var(--color-primary-light);
  }

  .navbar__cta {
    display: none;
  }

  .navbar__hamburger {
    display: flex;
  }

  .navbar__logo-name {
    display: block;
    font-size: var(--font-size-sm);
  }

  .section {
    padding-block: var(--space-16);
  }

  .hero {
    padding-block: var(--space-16);
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

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

/* ============================================================
   RESPONSIVE — Small mobile (< 480px)
   ============================================================ */
@media (max-width: 479px) {
  :root {
    --container-pad: 1rem;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

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

  .form-row--half {
    grid-template-columns: 1fr;
  }

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

  .stat-tile--wide {
    grid-column: span 1;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .section-header__title {
    font-size: var(--font-size-2xl);
  }

  .cta-section__actions {
    flex-direction: column;
  }

  .cta-section__actions .btn {
    width: 100%;
  }

  .contact-form-box {
    padding: var(--space-6);
  }
}