/* ============================================================
   AGBTECH CONSULTING — stylesheet
   iOS design language: clean, direct, premium.
   ============================================================ */

:root {
  --bg:         #ffffff;
  --bg-gray:    #f5f5f7;   /* Apple section gray */
  --ink:        #1d1d1f;   /* Apple near-black */
  --ink-soft:   #424245;
  --ink-mute:   #6e6e73;   /* secondary text */
  --hairline:   #d2d2d7;
  --accent:     #5856d6;   /* iOS system indigo */
  --accent-hi:  #7d7aff;   /* bright indigo for gradients and dark ground */
  --black:      #000000;
  --radius-card: 22px;
  --container:  1080px;
  --ease:       cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
               "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-weight: 400;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: #fff; }

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

/* ---------- type ---------- */

h1, h2 {
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.07;
}

h1 { font-size: clamp(2.9rem, 7.5vw, 5.4rem); }
h2 { font-size: clamp(2rem, 4.8vw, 3.3rem); }

/* emphasized word: quiet blue gradient, Apple keynote style */
h1 em, h2 em {
  font-style: normal;
  background: linear-gradient(110deg, var(--accent-hi), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent);
}

h3 {
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.1rem;
}

.section-sub {
  margin-top: 1.4rem;
  font-size: 1.08rem;
  color: var(--ink-mute);
  max-width: 34em;
}

.lede {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 400;
  color: var(--ink-mute);
  max-width: 32em;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
  padding: 0.85rem 1.9rem;
  border-radius: 980px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.3s var(--ease), color 0.3s var(--ease),
              transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.btn .arr {
  display: inline-block;
  margin-left: 0.45em;
  transition: transform 0.3s var(--ease);
}
.btn:hover .arr { transform: translateX(4px); }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #6361e0; transform: scale(1.02); }
.btn-primary:active { transform: scale(0.98); }

/* secondary action: Apple "learn more" style text link */
.btn-ghost {
  background: transparent;
  color: var(--accent);
  padding-left: 0.6rem;
  padding-right: 0.6rem;
}
.btn-ghost::after {
  content: "\203A";   /* › */
  margin-left: 0.4em;
  display: inline-block;
  transition: transform 0.3s var(--ease);
}
.btn-ghost:hover { text-decoration: underline; text-underline-offset: 4px; }
.btn-ghost:hover::after { transform: translateX(3px); }

.btn-invert { background: #fff; color: var(--ink); }
.btn-invert:hover { background: var(--bg-gray); transform: scale(1.02); }
.btn-invert:active { transform: scale(0.98); }

.btn-small {
  padding: 0.45rem 1.1rem;
  font-size: 0.85rem;
  background: var(--accent);
  color: #fff;
  white-space: nowrap;
}
.btn-small:hover { background: #6361e0; }

.btn-large { padding: 1rem 2.3rem; font-size: 1.08rem; }

/* ---------- scroll progress ---------- */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 90;
}

/* ---------- header: thin frosted iOS nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 251, 253, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease);
}

.site-header.scrolled { border-bottom-color: rgba(0, 0, 0, 0.08); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 54px;
}

.wordmark {
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.wordmark span { font-weight: 400; color: var(--ink-mute); }

.site-nav { display: flex; gap: 2.1rem; }

.site-nav a {
  font-size: 0.85rem;
  color: var(--ink);
  opacity: 0.8;
  text-decoration: none;
  transition: opacity 0.3s var(--ease), color 0.3s var(--ease);
}

.site-nav a:hover { opacity: 1; color: var(--accent); }

/* ---------- hero (entrance choreography) ---------- */

.hero {
  padding: clamp(6rem, 14vh, 10rem) 0 clamp(5.5rem, 13vh, 9rem);
  text-align: center;
}

.hero .eyebrow { margin-bottom: 1.25rem; }

.hero h1 { margin-bottom: 1.75rem; }

.hl { display: block; overflow: hidden; padding-bottom: 0.07em; }

.hl-in {
  display: block;
  transform: translateY(115%);
  animation: rise 1s var(--ease) forwards;
}

.hl:nth-child(2) .hl-in { animation-delay: 0.12s; }

@keyframes rise { to { transform: none; } }

.fade-up {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 0.9s var(--ease) forwards;
}

.hero .eyebrow.fade-up { animation-delay: 0.05s; }
.hero .lede.fade-up    { animation-delay: 0.5s; }
.hero-actions.fade-up  { animation-delay: 0.65s; }

@keyframes fadeUp { to { opacity: 1; transform: none; } }

.hero .lede { margin: 0 auto 2.5rem; }

.hero-actions {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

/* ---------- development terms + support credits ---------- */

.development, .support {
  padding: clamp(4.5rem, 11vh, 7.5rem) 0;
  background: var(--bg-gray);
}

.support { background: var(--bg); }

.section-head { margin-bottom: clamp(2.75rem, 6vh, 4.5rem); }

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.steps li {
  background: var(--bg);
  border-radius: var(--radius-card);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.support .steps li { background: var(--bg-gray); }

.steps li:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.steps li:nth-child(2) { transition-delay: 0.08s; }
.steps li:nth-child(3) { transition-delay: 0.16s; }
.steps li:hover { transition-delay: 0s; }

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 1.4rem;
}

.steps h3 { margin-bottom: 0.5rem; }

.steps p { font-size: 0.97rem; color: var(--ink-mute); }

.terms-note {
  margin-top: clamp(2.5rem, 5vh, 3.5rem);
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -0.018em;
  line-height: 1.35;
  color: var(--ink);
  max-width: 26em;
}

/* ---------- services (RFUD) ---------- */

.services {
  padding: clamp(4.5rem, 11vh, 7.5rem) 0;
  background: var(--bg);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.service {
  background: var(--bg-gray);
  border-radius: var(--radius-card);
  padding: clamp(2rem, 4vw, 3rem);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.service:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.09);
}

.service-index {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 2rem;
}

.service h3 { margin-bottom: 0.4rem; }

.service-tag {
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.9rem;
}

.service p:last-child { color: var(--ink-mute); font-size: 0.97rem; max-width: 30em; }

/* staggered reveal of the four cards */
.service-grid .service:nth-child(2) { transition-delay: 0.08s; }
.service-grid .service:nth-child(3) { transition-delay: 0.16s; }
.service-grid .service:nth-child(4) { transition-delay: 0.24s; }
.service-grid .service:hover { transition-delay: 0s; }

/* ---------- closing: statement + booking, Apple black ---------- */

.closing {
  background: var(--black);
  color: #f5f5f7;
  padding: clamp(6rem, 14vh, 9.5rem) 0 clamp(5rem, 12vh, 8rem);
}

.statement {
  font-weight: 700;
  font-size: clamp(1.7rem, 4.2vw, 2.9rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  max-width: 21em;
  margin: 0 auto;
  text-align: center;
}

/* words start dim; JS lights them up as you scroll */
.qw { opacity: 0.22; transition: opacity 0.45s ease; }
.qw.lit { opacity: 1; }

.closing-divider {
  width: 1px;
  height: clamp(3rem, 7vh, 5rem);
  margin: clamp(2.75rem, 6vh, 4.5rem) auto;
  background: rgba(245, 245, 247, 0.25);
}

.booking-cta {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.booking-cta .eyebrow { color: var(--accent-hi); }

.booking-cta h2 { margin-bottom: 1.4rem; }

.booking-cta .lede { color: rgba(245, 245, 247, 0.65); margin-bottom: 2.5rem; }

/* ---------- footer ---------- */

.site-footer {
  background: var(--bg-gray);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.5rem;
}

.site-footer .wordmark { font-size: 0.85rem; }

.footer-tag { font-size: 0.82rem; color: var(--ink-mute); }

.footer-copy { font-size: 0.78rem; color: var(--ink-mute); }

/* ---------- reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
}

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

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .fade-up, .hl-in { opacity: 1; transform: none; transition: none; animation: none; }
  .qw { opacity: 1; transition: none; }
  .scroll-progress { display: none; }
  .btn, .steps li, .service { transition: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .steps { grid-template-columns: 1fr; gap: 1rem; }
}

@media (max-width: 700px) {
  .site-nav { display: none; }
  .service-grid { grid-template-columns: 1fr; gap: 1rem; }
  .service-grid .service { transition-delay: 0s; }
  .hero { padding-top: 4.5rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary { width: 100%; max-width: 320px; text-align: center; }
  .header-inner { height: 50px; gap: 0.75rem; }
  .site-header .wordmark span { display: none; }
  .btn-small { padding: 0.4rem 1rem; font-size: 0.8rem; }
}