/* ============================================================
   DTS Consulting — styles
   Modern, minimal, dark. One accent color. No dependencies.
   ============================================================ */

:root {
  /* palette — dark grey + light blue */
  --bg:        #0f1216;
  --bg-alt:    #13171c;
  --surface:   #191e25;
  --surface-2: #1f2630;
  --border:    #262d37;
  --border-2:  #34414f;

  --text:      #e8ecf1;
  --muted:     #a6b1bf;
  --faint:     #6d7885;

  --accent:    #6db3f2;   /* light blue */
  --accent-2:  #4f97e0;
  --accent-ink:#08131f;

  /* type + spacing */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --maxw: 1120px;
  --radius: 16px;
  --radius-sm: 10px;

  --shadow: 0 1px 0 rgba(255,255,255,.03) inset, 0 20px 40px -24px rgba(0,0,0,.7);
}

/* ---------- reset-ish ---------- */
* { box-sizing: border-box; }
/* overflow-x: clip (not hidden) blocks sideways scroll WITHOUT creating a
   scroll container — so the sticky top bar keeps working. */
html { scroll-behavior: smooth; scroll-padding-top: 78px; overflow-x: clip; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  max-width: 100%;
}
/* never let a long word or big headline force a sideways scroll on phones */
h1, h2, h3, p, li, a { overflow-wrap: break-word; word-break: break-word; }
img, svg { max-width: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.15; letter-spacing: -0.02em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 1000;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; border-radius: 0 0 8px 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------- background glow ---------- */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60% 50% at 75% -5%, rgba(109,179,242,.13), transparent 60%),
    radial-gradient(50% 40% at 10% 0%, rgba(79,151,224,.08), transparent 55%);
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,15,20,.72);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -0.01em; }
.brand__mark {
  display: inline-grid; place-items: center;
  font-size: .82rem; font-weight: 800; letter-spacing: .08em;
  color: var(--accent-ink); background: linear-gradient(135deg, var(--accent), var(--accent-2));
  padding: 6px 8px; border-radius: 8px;
}
.brand__name { color: var(--text); }

.nav__links { display: flex; align-items: center; gap: 28px; }
.nav__links a:not(.btn) { color: var(--muted); font-weight: 500; font-size: .95rem; transition: color .18s; }
.nav__links a:not(.btn):hover, .nav__links a.is-active { color: var(--text); }
.nav__links a.is-active { color: var(--accent); }

.nav__toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav__toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .2s, opacity .2s; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: .98rem; line-height: 1;
  padding: 14px 22px; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, background .18s, border-color .18s, color .18s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--sm { padding: 10px 16px; font-size: .9rem; }
.btn--primary {
  color: var(--accent-ink);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px -12px rgba(109,179,242,.45);
}
.btn--primary:hover { transform: translateY(-2px); }
.btn--ghost { color: var(--text); border-color: var(--border-2); background: rgba(255,255,255,.02); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ============================================================
   SHARED SECTION
   ============================================================ */
.section { padding: 84px 0; }
/* land in-page anchors just below the sticky header, not under it */
section[id] { scroll-margin-top: 76px; }
.section--alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section__head { max-width: 720px; margin-bottom: 52px; }
.section__title { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 800; }
.section__lead { color: var(--muted); font-size: 1.08rem; margin-top: 14px; }

.eyebrow {
  color: var(--accent); font-weight: 600; font-size: .82rem;
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 14px;
}

/* ============================================================
   SECTION ACCORDION (mobile only — see RESPONSIVE below)
   Button wraps the title so it looks and behaves like plain
   text on desktop; only the mobile media query turns it into
   a tap target and makes .section__body collapsible.
   ============================================================ */
.section__toggle {
  -webkit-appearance: none; appearance: none;
  -webkit-tap-highlight-color: transparent;
  display: flex; align-items: center; gap: 12px;
  width: 100%; background: transparent; background-color: transparent;
  border: 0; box-shadow: none; border-radius: 0; padding: 0; margin: 0;
  font: inherit; color: inherit; text-align: left; cursor: default;
}
.section__chevron {
  display: none;
  width: 10px; height: 10px; flex-shrink: 0;
  border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform .2s ease;
}
.section__body { display: block; }
.section__body-inner { display: block; }

/* ============================================================
   HERO
   ============================================================ */
.hero { padding: clamp(72px, 12vw, 132px) 0 clamp(64px, 9vw, 104px); }
.hero__inner { max-width: 860px; }
.hero__title { font-size: clamp(2rem, 6.4vw, 4.2rem); font-weight: 800; margin: 6px 0 0; }
.accent { color: var(--accent); }
.hero__sub { color: var(--muted); font-size: clamp(1.05rem, 2.2vw, 1.25rem); margin-top: 22px; max-width: 640px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero__tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 44px; }
.hero__tags li {
  color: var(--muted); font-size: .82rem; font-weight: 500;
  border: 1px solid var(--border); background: var(--surface);
  padding: 7px 13px; border-radius: 999px;
}

/* ============================================================
   GRIDS + CARDS
   ============================================================ */
.grid { display: grid; gap: 20px; }
.grid--services { grid-template-columns: repeat(3, 1fr); }
.grid--principles { grid-template-columns: repeat(2, 1fr); }
.grid--three { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  transition: transform .2s ease, border-color .2s, background .2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-2); background: var(--surface-2); }
.card__title { font-size: 1.12rem; font-weight: 700; }
.card__body { color: var(--muted); font-size: .96rem; margin-top: 10px; }

.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.tags li {
  color: var(--accent); font-size: .74rem; font-weight: 600;
  background: rgba(109,179,242,.10); border: 1px solid rgba(109,179,242,.28);
  padding: 4px 10px; border-radius: 999px;
}

/* ============================================================
   WHY US
   ============================================================ */
.whyus { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.whyus__intro { position: sticky; top: 96px; }
.checklist { margin-top: 24px; display: grid; gap: 12px; }
.checklist li { position: relative; padding-left: 30px; color: var(--text); font-weight: 500; }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 7px;
  width: 16px; height: 16px; border-radius: 5px;
  background: rgba(109,179,242,.16); border: 1px solid var(--accent);
}
.checklist li::after {
  content: ""; position: absolute; left: 5px; top: 10px;
  width: 4px; height: 8px; border: solid var(--accent); border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.techstrip {
  display: flex; flex-wrap: wrap; gap: 10px 12px; justify-content: center;
  margin-top: 64px; padding-top: 40px; border-top: 1px solid var(--border);
}
.techstrip li { color: var(--faint); font-weight: 600; font-size: .9rem; letter-spacing: .02em; }
.techstrip li:not(:last-child)::after { content: "·"; margin-left: 12px; color: var(--border-2); }

/* ============================================================
   ABOUT
   ============================================================ */
.about { display: grid; grid-template-columns: 320px 1fr; gap: 28px; align-items: start; }

.profile {
  position: sticky; top: 96px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px; text-align: center;
  box-shadow: var(--shadow);
}
.profile__avatar {
  width: 84px; height: 84px; margin: 0 auto 18px;
  display: grid; place-items: center; border-radius: 20px;
  font-weight: 800; letter-spacing: .04em; font-size: 1.3rem; color: var(--accent-ink);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.profile__name { font-size: 1.2rem; font-weight: 700; }
.profile__role { color: var(--accent); font-weight: 600; margin-top: 4px; }
.profile__edu { color: var(--muted); font-size: .86rem; margin-top: 6px; }
.profile__tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin: 18px 0 4px; }
.profile__tags li {
  color: var(--accent); font-size: .72rem; font-weight: 600;
  background: rgba(109,179,242,.10); border: 1px solid rgba(109,179,242,.28);
  border-radius: 999px; padding: 4px 10px;
}
.profile__actions { display: grid; gap: 10px; margin-top: 22px; }

/* stat tiles */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stat { text-align: center; }
.stat__num { font-size: clamp(1.3rem, 3vw, 1.7rem); font-weight: 800; color: var(--accent); letter-spacing: -0.02em; }
.stat__label { color: var(--muted); font-size: .78rem; margin-top: 4px; }
@media (max-width: 560px) { .stats { grid-template-columns: repeat(2, 1fr); } }

.about__detail { display: grid; gap: 20px; }
.panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow);
}
.engagements { display: grid; gap: 16px; margin-top: 8px; }
.engagements li { display: grid; gap: 3px; padding-left: 16px; border-left: 2px solid var(--accent); }
.engagements strong { font-weight: 700; }
.engagements span { color: var(--muted); font-size: .92rem; }

/* ============================================================
   CTA / CONTACT
   ============================================================ */
.cta { max-width: 720px; }
.cta__title { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; margin-top: 6px; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.cta__note { color: var(--faint); font-size: .9rem; margin-top: 22px; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { border-top: 1px solid var(--border); padding: 40px 0; background: var(--bg); }
.footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer__links a { color: var(--muted); font-size: .92rem; transition: color .18s; }
.footer__links a:hover { color: var(--accent); }
.footer__copy { color: var(--faint); font-size: .86rem; width: 100%; }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
  .grid--services { grid-template-columns: repeat(2, 1fr); }
  .whyus { grid-template-columns: 1fr; gap: 36px; }
  .whyus__intro { position: static; }
  .about { grid-template-columns: 1fr; }
  .profile { position: static; max-width: 420px; }
}

@media (max-width: 720px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 6px;
    background: var(--bg-alt); border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform .2s ease, opacity .2s ease;
  }
  .nav__links.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__links a:not(.btn) { padding: 10px 4px; font-size: 1rem; border-bottom: 1px solid var(--border); }
  .nav__links .btn { margin-top: 8px; }
  .section { padding: 72px 0; }
  .grid--services, .grid--principles, .grid--three { grid-template-columns: 1fr; }

  /* section accordion: tap a title to expand/collapse its content */
  .section__toggle { cursor: pointer; }
  .section__chevron { display: block; }
  .section__toggle[aria-expanded="true"] .section__chevron { transform: rotate(-135deg); }

  .section__body {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows .3s ease;
  }
  .section__body.is-open { grid-template-rows: 1fr; }
  .section__body-inner { overflow: hidden; }
}