/*! HTML5 Boilerplate v9.0.1 | MIT License | https://html5boilerplate.com/ */

/* ==========================================================================
   Variables
   ========================================================================== */

:root {
  --color-brand:      #003d82;
  --color-brand-mid:  #0055b3;
  --color-accent:     #00a6e2;
  --color-accent-dark:#0086b8;
  --color-bg:         #ffffff;
  --color-bg-alt:     #f4f7fb;
  --color-text:       #1a2236;
  --color-text-muted: #5a6a84;
  --color-border:     #dde4ef;
  --color-code-bg:    #0d1b2e;

  --font-base: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 4px rgba(0,0,0,.07);
  --shadow-md: 0 4px 24px rgba(0,61,130,.10);
  --shadow-lg: 0 8px 40px rgba(0,61,130,.16);

  --container: 1140px;
  --section-gap: 96px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

img, svg { display: block; }
a { color: var(--color-accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ==========================================================================
   Utility
   ========================================================================== */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: var(--section-gap) 0; }
.section--alt { background: var(--color-bg-alt); }

.section__header {
  text-align: center;
  margin-bottom: 56px;
}
.section__header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: 12px;
}
.section__header p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 580px;
  margin: 0 auto;
}

.section__eyebrow {
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: .8rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  margin-bottom: 8px;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-base);
  font-size: .95rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background .18s, border-color .18s, color .18s, box-shadow .18s;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(0,166,226,.3);
}

.btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.5);
}
.btn--ghost:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
  text-decoration: none;
}

.btn--nav {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  padding: 9px 20px;
  font-size: .875rem;
}
.btn--nav:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  text-decoration: none;
}

.btn--block { width: 100%; }

.btn--submit { position: relative; }
.btn--submit.loading .btn__text { opacity: 0; }
.btn--submit.loading .btn__spinner { display: block; }
.btn__spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  position: absolute;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==========================================================================
   Header / Nav
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-brand);
  box-shadow: 0 2px 12px rgba(0,0,0,.15);
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 1.2rem;
  font-weight: 500;
  text-decoration: none;
  flex-shrink: 0;
}
.nav__logo strong { font-weight: 700; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin-left: auto;
}
.nav__links a {
  color: rgba(255,255,255,.85);
  font-size: .9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: background .15s, color .15s;
  text-decoration: none;
}
.nav__links a:hover { color: #fff; background: rgba(255,255,255,.1); }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
}
.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}
.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  background: linear-gradient(135deg, var(--color-brand) 0%, #005bb5 60%, #0072cc 100%);
  padding: 80px 0 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(0,166,226,.15) 0%, transparent 60%),
    radial-gradient(circle at 80% 20%, rgba(0,166,226,.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero__inner {
  display: flex;
  align-items: center;
  gap: 64px;
  position: relative;
  z-index: 1;
  padding-bottom: 64px;
}

.hero__text { flex: 1; min-width: 0; }

.hero__eyebrow {
  display: inline-block;
  background: rgba(0,166,226,.2);
  color: var(--color-accent);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
  border: 1px solid rgba(0,166,226,.3);
}

.hero__text h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -.02em;
}
.hero__text h1 span { color: var(--color-accent); }

.hero__sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,.8);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero__cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Hero visual: price badge + flow diagram */
.hero__visual {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.price-badge {
  background: rgba(255,255,255,.08);
  border: 2px solid rgba(255,255,255,.2);
  border-radius: var(--radius-lg);
  padding: 20px 36px;
  text-align: center;
  width: 100%;
}
.price-badge__rate {
  display: block;
  font-size: 2.8rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.03em;
  line-height: 1;
}
.price-badge__unit {
  display: block;
  font-size: 1rem;
  color: var(--color-accent);
  font-weight: 600;
  margin: 4px 0 6px;
}
.price-badge__note {
  display: block;
  font-size: .78rem;
  color: rgba(255,255,255,.5);
}

.flow-diagram svg {
  width: 220px;
  height: auto;
  display: block;
}

.hero__wave { line-height: 0; position: relative; z-index: 1; }
.hero__wave svg { width: 100%; height: 80px; }

/* ==========================================================================
   Scenarios
   ========================================================================== */

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card--wide {
  grid-column: span 3;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto auto;
  column-gap: 28px;
}
.scenario-card--wide .scenario-card__tag { grid-column: 1 / -1; }
.scenario-card--wide .scenario-card__icon { grid-row: 2 / 4; align-self: start; }
.scenario-card--wide h3 { grid-column: 2; align-self: end; }
.scenario-card--wide p { grid-column: 2; }
.scenario-card--wide .scenario-card__tags { grid-column: 2; }

.scenario-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  transition: box-shadow .2s, transform .2s;
}
.scenario-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.scenario-card__tag {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.scenario-card__icon {
  width: 48px;
  height: 48px;
  background: rgba(0,166,226,.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-accent-dark);
  flex-shrink: 0;
}
.scenario-card__icon svg { width: 28px; height: 28px; }

.scenario-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: 10px;
}

.scenario-card p {
  font-size: .9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.scenario-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
}
.scenario-card__tags li {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

/* ==========================================================================
   How it works
   ========================================================================== */

.how-grid {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-bottom: 64px;
}

.how-step {
  flex: 1;
  padding: 0 24px;
  text-align: center;
}
.how-step:first-child { padding-left: 0; }
.how-step:last-child  { padding-right: 0; }

.how-step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-brand);
  color: #fff;
  font-size: .85rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: .04em;
}

.how-step h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: 8px;
}

.how-step p {
  font-size: .88rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.how-step__connector {
  width: 2px;
  height: 48px;
  background: var(--color-border);
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 24px;
}

/* Stack bar */
.stack-bar {
  border-top: 1px solid var(--color-border);
  padding-top: 40px;
  text-align: center;
}
.stack-bar h3 {
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}
.stack-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.stack-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--color-text);
  font-family: var(--font-mono);
}

/* ==========================================================================
   Case study
   ========================================================================== */

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

.section--code .section__header--light h2 {
  color: #fff;
}
.section--code .section__header--light p {
  color: rgba(255,255,255,.6);
}

.case-study {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  align-items: start;
}

.case-study__highlights {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.cs-highlight {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.cs-highlight__num {
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--color-accent);
  background: rgba(0,166,226,.12);
  border: 1px solid rgba(0,166,226,.2);
  border-radius: 4px;
  padding: 3px 8px;
  flex-shrink: 0;
  margin-top: 2px;
}

.cs-highlight strong {
  display: block;
  font-size: .92rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.cs-highlight p {
  font-size: .83rem;
  color: rgba(255,255,255,.5);
  line-height: 1.65;
  margin: 0;
}

.case-study__code {
  min-width: 0;
}

.case-study__code pre {
  max-height: 560px;
  overflow-y: auto;
}

.code-block__tags {
  margin-left: auto;
  display: flex;
  gap: 6px;
}
.code-block__tags span {
  background: rgba(0,166,226,.15);
  border: 1px solid rgba(0,166,226,.2);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: .72rem;
  font-weight: 600;
  color: var(--color-accent);
}

.c-cm { color: #6e8a9e; }
.c-fn { color: #e2b96f; }

@media (max-width: 960px) {
  .case-study { grid-template-columns: 1fr; }
  .case-study__code pre { max-height: 400px; }
}

/* ==========================================================================
   About
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about__text h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-brand);
  margin-bottom: 16px;
}
.about__text p {
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}
.about__text p:last-of-type { margin-bottom: 28px; }
.about__text strong { color: var(--color-text); }

.about__details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
}
.about__detail-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.detail-label {
  font-size: .72rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.detail-value {
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-text);
}

/* Code block */
.code-block {
  background: var(--color-code-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.code-block__header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: rgba(255,255,255,.05);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.code-block__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,.15);
}
.code-block__dot:nth-child(1) { background: #ff5f57; }
.code-block__dot:nth-child(2) { background: #febc2e; }
.code-block__dot:nth-child(3) { background: #28c840; }
.code-block__title {
  margin-left: 8px;
  font-size: .78rem;
  color: rgba(255,255,255,.4);
  font-family: var(--font-mono);
}
.code-block pre {
  padding: 24px;
  overflow-x: auto;
}
.code-block code {
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.8;
  color: #c9d1d9;
}
.c-kw  { color: #ff7b72; }
.c-str { color: #a5d6ff; }
.c-num { color: #79c0ff; }

/* ==========================================================================
   FAQ
   ========================================================================== */

.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-item:first-child { border-top: 1px solid var(--color-border); }

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-brand);
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.faq-item__question::-webkit-details-marker { display: none; }
.faq-item__question::after {
  content: '';
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23003d82' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  transition: transform .2s;
}
.faq-item[open] .faq-item__question::after {
  transform: rotate(180deg);
}

.faq-item__answer {
  padding: 0 0 20px;
}
.faq-item__answer p {
  font-size: .95rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-form {
  max-width: 680px;
  margin: 0 auto;
}

.contact-form.submitted .form-fields { display: none; }

.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.form-row--two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-base);
  font-size: .92rem;
  color: var(--color-text);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0,166,226,.12);
}

.form-group input.error,
.form-group textarea.error { border-color: #ef4444; }

.form-error {
  display: block;
  font-size: .8rem;
  color: #ef4444;
  margin-top: 4px;
  min-height: 1.1em;
}

.form-group--checkbox { margin-bottom: 24px; }

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: .85rem;
  color: var(--color-text-muted);
  cursor: pointer;
  line-height: 1.55;
}
.checkbox-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.checkbox-custom {
  width: 18px;
  height: 18px;
  min-width: 18px;
  border: 1.5px solid var(--color-border);
  border-radius: 4px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
  transition: border-color .15s, background .15s;
}
.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
  content: '';
  display: block;
  width: 10px;
  height: 6px;
  border: 2px solid #fff;
  border-top: none;
  border-right: none;
  transform: rotate(-45deg) translateY(-1px);
}

.form-success {
  display: none;
  align-items: center;
  gap: 12px;
  background: #f0fdf4;
  border: 1px solid #86efac;
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-top: 16px;
  color: #166534;
  font-size: .92rem;
}
.form-success.visible { display: flex; }
.form-success svg { width: 24px; height: 24px; flex-shrink: 0; }


/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: var(--color-brand);
  padding: 40px 0;
}
.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 500;
}
.footer__brand strong { font-weight: 700; }
.footer__copy { font-size: .87rem; color: rgba(255,255,255,.65); }
.footer__copy a { color: rgba(255,255,255,.8); }
.footer__copy a:hover { color: #fff; }
.footer__note {
  font-size: .78rem;
  color: rgba(255,255,255,.4);
  max-width: 560px;
  line-height: 1.6;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 960px) {
  :root { --section-gap: 72px; }

  .hero__inner { flex-direction: column; gap: 32px; }
  .hero__visual { align-self: flex-start; }

  .scenarios-grid { grid-template-columns: 1fr 1fr; }
  .scenario-card--wide { grid-column: span 2; }

  .how-grid { flex-wrap: wrap; }
  .how-step { min-width: 45%; }
  .how-step__connector { display: none; }

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

@media (max-width: 640px) {
  :root { --section-gap: 56px; }

  .nav__links { display: none; flex-direction: column; gap: 4px; }
  .nav__links.open {
    display: flex;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-brand);
    padding: 16px 24px 24px;
    box-shadow: 0 8px 24px rgba(0,0,0,.2);
    z-index: 99;
  }
  .nav__links a { padding: 12px 16px; font-size: 1rem; }
  .nav__burger { display: flex; }

  .hero { padding-top: 48px; }
  .hero__text h1 { font-size: 2rem; }

  .scenarios-grid { grid-template-columns: 1fr; }
  .scenario-card--wide { grid-column: span 1; display: block; }

  .how-step { min-width: 100%; padding: 0; margin-bottom: 24px; }

  .form-row--two { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }

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

/* ==========================================================================
   Print
   ========================================================================== */

@media print {
  .site-header, .hero__wave, .footer, .btn { display: none !important; }
  .hero { background: none !important; padding: 0 !important; }
  .hero__text h1, .hero__text h1 span { color: #000 !important; }
}