/* ============================================================
   C4 Cyber - styles.css
   Modern dark / tech aesthetic. Brand: navy + cyan accent.
   ============================================================ */

:root {
  --bg:        #0a0e17;   /* near-black navy */
  --bg-2:      #0e1420;   /* alt section */
  --panel:     #121a2b;   /* card surface */
  --panel-2:   #16203400;
  --border:    #1f2b45;
  --navy:      #2d4a9e;   /* brand blue from logo */
  --navy-2:    #3a5bc7;
  --accent:    #35d0e0;   /* cyan tech accent */
  --accent-2:  #4f8cff;
  --text:      #e7ecf5;
  --muted:     #9aa7c0;
  --muted-2:   #6b7896;
  --white:     #ffffff;
  --radius:    16px;
  --radius-sm: 10px;
  --maxw:      1160px;
  --ease:      cubic-bezier(.16,.84,.44,1);
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { animation: none !important; transition: none !important; }
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }

h1,h2,h3 { font-family: var(--font-head); font-weight: 600; line-height: 1.12; letter-spacing: -.02em; margin: 0; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 1rem; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(20px, 5vw, 40px); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--accent); color: #051016; padding: 10px 16px; border-radius: 0 0 8px 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  font-family: var(--font-head); font-weight: 600; font-size: .98rem;
  padding: .72em 1.35em; border-radius: 999px; cursor: pointer;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--navy-2), var(--accent-2));
  color: var(--white);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
  box-shadow: 0 6px 24px -8px rgba(79,140,255,.6);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 34px -8px rgba(79,140,255,.75); }
.btn--lg { padding: .95em 1.8em; font-size: 1.05rem; }
.btn--sm { padding: .55em 1.1em; font-size: .9rem; }
.btn--ghost {
  background: transparent; border-color: var(--border); color: var(--text);
  box-shadow: none;
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); box-shadow: none; }

.eyebrow {
  font-family: var(--font-head); text-transform: uppercase; letter-spacing: .22em;
  font-size: .78rem; font-weight: 600; color: var(--accent); margin: 0 0 .9rem;
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(10,14,23,.82);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: .6rem; }
.brand__mark { width: 38px; height: 38px; }
.brand__name { font-family: var(--font-head); font-weight: 700; font-size: 1.25rem; color: var(--white); letter-spacing: -.01em; }
.nav__links { display: flex; align-items: center; gap: 1.9rem; }
.nav__links > a:not(.btn) { color: var(--muted); font-weight: 500; font-size: .96rem; transition: color .2s; }
.nav__links > a:not(.btn):hover { color: var(--white); }

.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav__toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s var(--ease); }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  display: none; flex-direction: column;
  background: rgba(12,17,28,.98); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 8px clamp(20px,5vw,40px) 20px;
}
.nav__mobile a { color: var(--text); padding: 14px 4px; border-bottom: 1px solid var(--border); font-family: var(--font-head); font-weight: 500; }
.nav__mobile a:last-child { border-bottom: 0; color: var(--accent); }
.nav__mobile.open { display: flex; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 190px 0 120px; overflow: hidden; }
.hero__inner { position: relative; z-index: 2; max-width: 860px; }
.hero__grid {
  position: absolute; inset: 0; z-index: 0; opacity: .5;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 30% 0%, #000 40%, transparent 78%);
          mask-image: radial-gradient(ellipse 80% 70% at 30% 0%, #000 40%, transparent 78%);
}
.hero__glow {
  position: absolute; z-index: 1; top: -180px; right: -120px;
  width: 620px; height: 620px; border-radius: 50%;
  background: radial-gradient(circle, rgba(53,208,224,.16), rgba(45,74,158,.14) 45%, transparent 70%);
  filter: blur(20px);
  animation: float 14s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform: translate(0,0);} 50% { transform: translate(-30px,30px);} }

.hero__title {
  font-size: clamp(2.6rem, 6.2vw, 4.5rem);
  font-weight: 700; letter-spacing: -.03em; margin: 0 0 1.3rem; color: var(--white);
}
.hero__title .accent { color: var(--accent); }
.hero__lead { font-size: clamp(1.05rem, 1.7vw, 1.28rem); color: var(--muted); max-width: 640px; margin-bottom: 2.2rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 2.6rem; }
.hero__badges { list-style: none; display: flex; flex-wrap: wrap; gap: .7rem; padding: 0; margin: 0; }
.hero__badges li {
  font-family: var(--font-head); font-size: .82rem; font-weight: 500; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: .45em 1em; background: rgba(255,255,255,.02);
}

/* ---------- Stats ---------- */
.stats { padding: 10px 0 30px; }
.stats__grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--bg-2); padding: 2rem 1.6rem; display: flex; flex-direction: column; gap: .5rem; }
.stat__num { font-family: var(--font-head); font-weight: 700; font-size: clamp(2rem,3.6vw,2.8rem); color: var(--white); line-height: 1; background: linear-gradient(120deg,#fff,var(--accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat__label { color: var(--muted); font-size: .92rem; line-height: 1.4; }

/* ---------- Clients ---------- */
.clients { padding: 46px 0 20px; }
.clients__label { text-align: center; color: var(--muted-2); font-family: var(--font-head); text-transform: uppercase; letter-spacing: .18em; font-size: .76rem; margin-bottom: 1.4rem; }
.clients__list { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: .7rem 1rem; padding: 0; margin: 0; }
.clients__list li { color: var(--muted); font-family: var(--font-head); font-weight: 500; font-size: .95rem; padding: .4em .2em; opacity: .85; }
.clients__list li::after { content: "•"; color: var(--navy-2); margin-left: 1rem; }
.clients__list li:last-child::after { content: ""; }

/* ---------- Sections ---------- */
.section { padding: clamp(70px, 9vw, 120px) 0; }
.section--alt { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section__head { max-width: 640px; margin-bottom: 3rem; }
.section__sub { color: var(--muted); font-size: 1.08rem; }

/* ---------- Cards / services ---------- */
.cards { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.4rem; }
.card {
  position: relative; background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 2rem 1.8rem;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(140deg, rgba(53,208,224,.5), transparent 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .35s var(--ease);
}
.card:hover { transform: translateY(-6px); border-color: transparent; box-shadow: 0 24px 50px -20px rgba(0,0,0,.7); }
.card:hover::before { opacity: 1; }
.card__icon {
  width: 52px; height: 52px; display: grid; place-items: center; margin-bottom: 1.2rem;
  font-size: 1.7rem; color: var(--accent);
  background: linear-gradient(135deg, rgba(45,74,158,.35), rgba(53,208,224,.12));
  border: 1px solid var(--border); border-radius: 14px;
}
.card h3 { color: var(--white); margin-bottom: .6rem; }
.card p { color: var(--muted); font-size: .97rem; margin: 0; }

/* ---------- Approach ---------- */
.approach { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(2rem,5vw,4.5rem); align-items: start; }
.approach__intro { position: sticky; top: 100px; }
.approach__frameworks { display: flex; flex-direction: column; gap: 1.1rem; }
.framework { background: var(--panel); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: var(--radius-sm); padding: 1.5rem 1.7rem; transition: transform .3s var(--ease); }
.framework:hover { transform: translateX(6px); }
.framework h3 { color: var(--white); margin-bottom: .4rem; }
.framework p { color: var(--muted); font-size: .96rem; margin: 0; }

/* ---------- AI / CVP ---------- */
.cvp {
  max-width: 860px; background: var(--panel); border: 1px solid var(--border);
  border-left: 3px solid var(--accent); border-radius: var(--radius-sm);
  padding: clamp(1.6rem, 4vw, 2.4rem);
}
.cvp__head { display: flex; align-items: center; flex-wrap: wrap; gap: .75rem; margin-bottom: 1.1rem; }
.cvp__head h3 { color: var(--white); margin: 0; }
.cvp__badge {
  font-family: var(--font-head); font-size: .72rem; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 999px; padding: .28rem .7rem;
}
.cvp p { color: var(--muted); margin-bottom: 1rem; }
.cvp p:last-child { margin-bottom: 0; }
.cvp__note { border-top: 1px solid var(--border); padding-top: 1rem; font-size: .95rem; }

/* ---------- Case study ---------- */
.case { max-width: 860px; }
.case__context { font-size: 1.15rem; color: var(--text); margin-bottom: 2.2rem; padding-left: 1.4rem; border-left: 3px solid var(--navy-2); }
.case__steps { list-style: none; counter-reset: step; padding: 0; margin: 0; display: grid; gap: 1rem; }
.case__steps li { position: relative; padding: 1.2rem 1.4rem 1.2rem 4.6rem; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--muted); }
.case__steps li em { color: var(--accent); font-style: normal; font-weight: 600; }
.case__steps li span {
  position: absolute; left: 1.2rem; top: 1.1rem;
  font-family: var(--font-head); font-weight: 700; font-size: 1.15rem;
  color: var(--navy-2); opacity: .9;
}

/* ---------- About / founder ---------- */
.about { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(2rem,5vw,4rem); align-items: start; }
.about__body p { color: var(--muted); }
.about__body h2 { margin-bottom: 1.2rem; }
.founder { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 2rem 1.9rem; }
.founder__kicker { font-family: var(--font-head); text-transform: uppercase; letter-spacing: .16em; font-size: .74rem; color: var(--accent); margin: 0 0 .5rem; }
.founder__name { color: var(--white); display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.founder__cert { font-size: .7rem; font-family: var(--font-head); letter-spacing: .1em; background: linear-gradient(135deg,var(--navy-2),var(--accent-2)); color: #fff; padding: .3em .7em; border-radius: 999px; }
.founder__role { color: var(--muted-2); font-size: .95rem; margin: .3rem 0 1.1rem; }
.founder p { color: var(--muted); font-size: .96rem; }
.founder__linkedin {
  display: inline-flex; align-items: center; gap: .5rem; margin-top: .4rem;
  font-family: var(--font-head); font-weight: 500; font-size: .92rem; color: var(--muted);
  transition: color .2s var(--ease);
}
.founder__linkedin:hover { color: var(--accent); }
.founder__linkedin svg { flex: none; }

/* ---------- Contact ---------- */
.contact { text-align: center; position: relative; overflow: hidden; }
.contact__inner { max-width: 720px; margin: 0 auto; position: relative; z-index: 2; }
.contact__inner h2 { margin-bottom: 1rem; }
.contact__actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 2rem; }

/* ---------- Contact form ---------- */
.cform { max-width: 620px; margin: 2.4rem auto 0; text-align: left; }
.cform__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.cform__field { display: flex; flex-direction: column; margin-bottom: 1.1rem; }
.cform__field label { font-family: var(--font-head); font-size: .85rem; font-weight: 500; color: var(--muted); margin-bottom: .45rem; letter-spacing: .01em; }
.cform__opt { color: var(--muted-2); font-weight: 400; }
.cform input,
.cform textarea {
  width: 100%; font-family: var(--font-body); font-size: 1rem; color: var(--text);
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: .8em 1em; transition: border-color .2s var(--ease), box-shadow .2s var(--ease); resize: vertical;
}
.cform input::placeholder,
.cform textarea::placeholder { color: var(--muted-2); }
.cform input:focus,
.cform textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(53,208,224,.15); }
.cform input:user-invalid,
.cform textarea:user-invalid { border-color: #e0556b; }
/* honeypots - hidden from humans, off-screen (display:none can be detected/skipped by some bots) */
.cform__hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; opacity: 0; pointer-events: none; }
.cform__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.4rem; margin-top: .4rem; }
.cform button[disabled] { opacity: .6; cursor: not-allowed; transform: none; }
.cform__status { margin: 0; font-size: .95rem; font-weight: 500; }
.cform__status.is-error { color: #ff8095; }
.cform__status.is-ok { color: var(--accent); }
.cform__fallback { margin: 1.4rem 0 0; font-size: .9rem; color: var(--muted-2); }
.cform__fallback a { color: var(--muted); }
.cform__fallback a:hover { color: var(--accent); }
@media (max-width: 560px) { .cform__row { grid-template-columns: 1fr; gap: 0; } }

/* thank-you panel (shown briefly after submit) */
.cform__thanks { max-width: 620px; margin: 0 auto; text-align: center; padding: 1rem 0 .5rem; }
.cform__thanks[hidden] { display: none; }
.cform__thanks-icon {
  width: 76px; height: 76px; margin: 0 auto 1.4rem; display: grid; place-items: center;
  font-size: 2.2rem; color: var(--accent); border-radius: 50%;
  background: linear-gradient(135deg, rgba(45,74,158,.35), rgba(53,208,224,.14));
  border: 1px solid var(--border);
  animation: pop .5s var(--ease) both;
}
@keyframes pop { 0% { transform: scale(.6); opacity: 0; } 60% { transform: scale(1.08); } 100% { transform: scale(1); opacity: 1; } }
.cform__thanks h2 { margin-bottom: .8rem; }
.cform__thanks p { color: var(--muted); }
.cform__thanks-ref {
  display: inline-block; margin: 1.4rem auto 0; padding: .9rem 1.6rem;
  border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--panel);
  font-size: .9rem; color: var(--muted-2); line-height: 1.7;
}
.cform__thanks-ref strong {
  font-family: var(--font-head); font-size: 1.3rem; letter-spacing: .04em; color: var(--white);
}
.cform__thanks-note { color: var(--muted-2); font-size: .9rem; margin-top: 1.2rem; }

/* ---------- Footer ---------- */
.footer { background: #070a11; border-top: 1px solid var(--border); padding: 56px 0 30px; }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2rem; padding-bottom: 2rem; border-bottom: 1px solid var(--border); }
.footer__brand { display: flex; align-items: center; gap: .8rem; }
.footer__tag { color: var(--muted-2); font-size: .86rem; margin: .2rem 0 0; }
.footer__meta { color: var(--muted); font-size: .9rem; text-align: right; }
.footer__meta p { margin: 0 0 .35rem; }
.footer__meta a { color: var(--muted); }
.footer__meta a:hover { color: var(--accent); }
.footer__bar { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-top: 1.6rem; color: var(--muted-2); font-size: .84rem; }
.footer__bar p { margin: 0; }
.footer__bar a { color: var(--muted); }
.footer__bar a:hover { color: var(--accent); }

/* ---------- Legal / content pages ---------- */
.legal { padding: 140px 0 90px; }
.legal .container { max-width: 820px; }
.legal h1 { font-size: clamp(2rem, 4vw, 2.8rem); color: var(--white); margin-bottom: .6rem; }
.legal__updated { color: var(--muted-2); font-size: .9rem; margin-bottom: 2.4rem; }
.legal h2 { font-size: 1.3rem; color: var(--white); margin: 2.4rem 0 .7rem; }
.legal p, .legal li { color: var(--muted); }
.legal ul { padding-left: 1.2rem; margin: 0 0 1rem; }
.legal li { margin-bottom: .4rem; }
.legal a { color: var(--accent); }
.legal a:hover { text-decoration: underline; }
.legal__back { display: inline-block; margin-top: 2.4rem; }

/* ---------- Reveal animation ---------- */
/* Only hide content when JS is active (html.js). Without JS everything stays visible. */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  .stats__grid { grid-template-columns: repeat(2,1fr); }
  .cards { grid-template-columns: repeat(2,1fr); }
  .approach { grid-template-columns: 1fr; }
  .approach__intro { position: static; }
  .about { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav__toggle { display: flex; }
  .hero { padding: 150px 0 90px; }
  .cards { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; }
  .footer__meta { text-align: left; }
}
@media (max-width: 460px) {
  .stats__grid { grid-template-columns: 1fr; }
  body { font-size: 16px; }
}