/* ============================================================
   MSC A.M.O. & Co. — Defence-grade institutional
   ============================================================ */

:root {
  /* palette — indigo brand blue (#3a2e8c, from logo) */
  --navy-950: #07061d;
  --navy-900: #0b0a29;
  --navy-850: #14113c;
  --navy-800: #1d1860;
  --navy-700: #2a2380;
  --royal:    #3a2e8c;
  --indigo:   #3a2e8c;
  --electric: #6d7bff;
  --electric-soft: rgba(109, 123, 255, 0.16);
  --steel:    #a6abd6;
  --steel-dim:#74769f;
  --silver:   #cdd0ea;
  --white:    #eef0ff;
  --line:     rgba(166, 171, 214, 0.16);
  --line-strong: rgba(166, 171, 214, 0.30);
  --header-h: 92px;

  /* Section photography */
  --img-hero:         url('../img/hero.jpg?v=4');
  --img-about:        url('../img/about.jpg?v=4');
  --img-banner:       url('../img/banner-ops.jpg?v=4');
  --img-partnerships: url('../img/partnerships.jpg?v=4');
  --img-mission:      url('../img/mission.jpg?v=4');

  /* type */
  --font-display: 'Saira', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --maxw: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-body);
  color: var(--silver);
  background: var(--navy-900);
  line-height: 1.65;
  font-weight: 300;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

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

/* film grain overlay */
.grain {
  position: fixed; inset: 0; z-index: 9999; pointer-events: none; opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* ===================== TYPOGRAPHY ===================== */
.section-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel-dim);
  display: flex; align-items: center; gap: 0.6em;
  margin-bottom: 1.4rem;
}
.section-tag span { color: var(--electric); }
.section-tag.light { color: var(--steel); }

.section-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--white);
  margin-bottom: 1.6rem;
  text-wrap: balance;
}

.section p { color: var(--steel); max-width: 60ch; }
.section p + p { margin-top: 1.1rem; }

/* ===================== HEADER ===================== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(6, 12, 34, 0.82);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.brand-logo { height: 56px; width: auto; transition: height 0.4s var(--ease); }
.site-header.scrolled .brand-logo { height: 46px; }
.nav { display: flex; align-items: center; gap: clamp(1rem, 2.4vw, 2.6rem); }
.nav a {
  font-family: var(--font-mono);
  font-size: 0.82rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--steel); position: relative; padding: 4px 0;
  transition: color 0.25s;
}
.nav a:not(.nav-cta)::after {
  content: ''; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: var(--electric); transition: width 0.3s var(--ease);
}
.nav a:not(.nav-cta):hover { color: var(--white); }
.nav a:not(.nav-cta):hover::after { width: 100%; }
.nav-cta {
  border: 1px solid var(--line-strong); padding: 9px 20px; color: var(--white);
  transition: background 0.25s, border-color 0.25s;
}
.nav-cta:hover { background: var(--electric-soft); border-color: var(--electric); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; width: 30px; height: 22px; position: relative; }
.nav-toggle span { position: absolute; left: 0; height: 2px; width: 100%; background: var(--white); transition: 0.3s var(--ease); }
.nav-toggle span:nth-child(1) { top: 0; }
.nav-toggle span:nth-child(2) { top: 10px; }
.nav-toggle span:nth-child(3) { top: 20px; }

/* ===================== HERO ===================== */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center;
  padding-top: var(--header-h); overflow: hidden;
  background: var(--navy-950);
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: linear-gradient(115deg, rgba(7,6,29,0.95) 0%, rgba(20,17,60,0.78) 42%, rgba(58,46,140,0.46) 100%), var(--img-hero);
  background-size: cover; background-position: center right;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(120% 90% at 18% 50%, transparent 30%, rgba(7,6,29,0.55) 100%);
  pointer-events: none;
}

/* tracer streaks motif */
.hero-streaks { position: absolute; top: 50%; right: 8%; width: 40vw; height: 40vw; max-width: 620px; max-height: 620px; transform: translateY(-50%); pointer-events: none; }
.hero-streaks span {
  position: absolute; top: 50%; left: 50%; height: 2px; width: 140px;
  background: linear-gradient(90deg, transparent, var(--electric));
  transform-origin: left center; border-radius: 2px; opacity: 0;
  filter: drop-shadow(0 0 6px rgba(77,139,255,0.5));
  animation: tracer 4.5s var(--ease) infinite;
}
.hero-streaks span:nth-child(1){ transform: rotate(-72deg); animation-delay: 0s; }
.hero-streaks span:nth-child(2){ transform: rotate(-40deg); width:110px; animation-delay: .35s; }
.hero-streaks span:nth-child(3){ transform: rotate(-12deg); width:170px; animation-delay: .7s; }
.hero-streaks span:nth-child(4){ transform: rotate(16deg); width:120px; animation-delay: .2s; }
.hero-streaks span:nth-child(5){ transform: rotate(44deg); width:150px; animation-delay: .9s; }
.hero-streaks span:nth-child(6){ transform: rotate(70deg); width:100px; animation-delay: .5s; }
.hero-streaks span:nth-child(7){ transform: rotate(112deg); width:160px; animation-delay: 1.1s; }
.hero-streaks span:nth-child(8){ transform: rotate(150deg); width:90px; animation-delay: .15s; }
.hero-streaks span:nth-child(9){ transform: rotate(-120deg); width:130px; animation-delay: .8s; }
.hero-streaks span:nth-child(10){ transform: rotate(-160deg); width:115px; animation-delay: 1.3s; }
@keyframes tracer {
  0% { opacity: 0; transform: rotate(var(--r,0)) scaleX(0.2); }
  12% { opacity: 1; }
  45% { opacity: .9; }
  100% { opacity: 0; transform: rotate(var(--r,0)) scaleX(1.25); }
}

.hero-inner { position: relative; z-index: 2; max-width: 820px; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--steel);
  display: inline-flex; align-items: center; gap: 0.7em; margin-bottom: 1.8rem;
}
.tick { width: 28px; height: 1px; background: var(--electric); display: inline-block; }
.hero-title {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(2.4rem, 6.5vw, 5rem); line-height: 1.02;
  letter-spacing: -0.015em; color: var(--white); margin-bottom: 1.8rem;
  text-wrap: balance;
}
.hero-title span { font-weight: 300; color: var(--steel); }
.hero-lead { font-size: clamp(1rem, 1.5vw, 1.18rem); color: var(--steel); max-width: 56ch; margin-bottom: 2.4rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 2.6rem; }
.hero-tagline { font-family: var(--font-display); font-style: italic; font-weight: 300; color: var(--silver); font-size: 1.05rem; letter-spacing: 0.02em; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 15px 30px; border: 1px solid transparent; cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s, border-color 0.25s, color 0.25s;
}
.btn-primary { background: var(--electric); color: var(--navy-950); font-weight: 500; }
.btn-primary:hover { background: var(--white); transform: translateY(-2px); }
.btn-ghost { border-color: var(--line-strong); color: var(--white); }
.btn-ghost:hover { border-color: var(--electric); background: var(--electric-soft); transform: translateY(-2px); }
.btn-block { width: 100%; }

.scroll-cue { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); width: 24px; height: 40px; border: 1px solid var(--line-strong); border-radius: 14px; z-index: 2; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 3px; height: 7px; border-radius: 3px; background: var(--electric); transform: translateX(-50%); animation: cue 1.8s var(--ease) infinite; }
@keyframes cue { 0%{ opacity:0; transform: translate(-50%,0);} 30%{opacity:1;} 100%{ opacity:0; transform: translate(-50%,14px);} }

/* ===================== SECTIONS ===================== */
.section { padding: clamp(72px, 11vw, 150px) 0; position: relative; }
.section-head { max-width: 760px; margin-bottom: clamp(40px, 6vw, 72px); }
.section-intro { font-size: 1.05rem; margin-top: 1.2rem; }

.grid-2 { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(32px, 6vw, 88px); align-items: center; }
.grid-2-rev .expertise-copy { order: 1; }

/* about */
.about { border-top: 1px solid var(--line); }
.stat-row { list-style: none; display: flex; gap: clamp(24px, 4vw, 52px); margin-top: 2.4rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.stat-row li { display: flex; flex-direction: column; }
.stat-row strong { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.8rem, 3vw, 2.6rem); color: var(--white); line-height: 1; }
.stat-row span { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--steel-dim); margin-top: 0.5rem; }

/* media frame */
.media-frame { position: relative; aspect-ratio: 5 / 6; border: 1px solid var(--line-strong); background-size: cover; background-position: center; overflow: hidden; }
.media-about { background-image: var(--img-about); }
.media-frame::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(5,11,34,0.6)); }
.media-label { position: absolute; bottom: 16px; left: 16px; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em; color: var(--steel); z-index: 2; }
.corner { position: absolute; width: 14px; height: 14px; border: 1px solid var(--electric); z-index: 2; }
.corner.tl { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.corner.tr { top: 10px; right: 10px; border-left: 0; border-bottom: 0; }
.corner.bl { bottom: 10px; left: 10px; border-right: 0; border-top: 0; }
.corner.br { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }

/* cards */
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.card { background: var(--navy-900); padding: clamp(26px, 2.4vw, 38px) clamp(22px, 2vw, 32px); position: relative; transition: background 0.35s var(--ease), transform 0.35s var(--ease); }
.card:hover { background: var(--navy-850); }
.card-no { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em; color: var(--electric); }
.card h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.18rem; color: var(--white); margin: 1.2rem 0 0.8rem; line-height: 1.2; }
.card p { font-size: 0.92rem; color: var(--steel); }
.card::after { content: ''; position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--electric); transition: width 0.4s var(--ease); }
.card:hover::after { width: 100%; }

/* ===================== BANNERS ===================== */
.banner { position: relative; padding: clamp(80px, 14vw, 180px) 0; background-size: cover; background-position: center; background-attachment: fixed; }
.banner-ops { background-image: var(--img-banner); }
.banner-mission { background-image: var(--img-mission); }
.banner-overlay { position: absolute; inset: 0; background: linear-gradient(110deg, rgba(7,6,29,0.92) 0%, rgba(12,11,45,0.64) 48%, rgba(40,33,112,0.38) 100%); }
.banner-inner { position: relative; z-index: 2; max-width: 920px; }
.banner-quote { font-family: var(--font-display); font-weight: 300; font-size: clamp(1.4rem, 3vw, 2.3rem); line-height: 1.3; color: var(--white); text-wrap: balance; }
.mission-statement { font-family: var(--font-display); font-weight: 300; font-size: clamp(1.3rem, 2.6vw, 2rem); line-height: 1.4; color: var(--white); margin-top: 1.4rem; text-wrap: balance; }

/* ===================== EXPERTISE / TAG LIST ===================== */
.expertise { border-top: 1px solid var(--line); }
.tag-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.tag-list li { background: var(--navy-900); padding: 18px 22px; font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.04em; color: var(--silver); transition: background 0.3s, color 0.3s; }
.tag-list li:hover { background: var(--navy-850); color: var(--white); }

/* ===================== PARTNERSHIPS ===================== */
.partnerships { position: relative; overflow: hidden; border-top: 1px solid var(--line); }
.partnerships-media { position: absolute; inset: 0; background-image: var(--img-partnerships); background-size: cover; background-position: center; opacity: 0.52; }
.partnerships-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(11,10,41,0.90) 0%, rgba(15,13,58,0.62) 55%, rgba(20,17,70,0.74) 100%); }
.partnerships .container { position: relative; z-index: 2; }
.country-grid { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.country-grid li { background: rgba(20,17,70,0.62); padding: 26px 24px; font-family: var(--font-display); font-weight: 400; font-size: 1.1rem; color: var(--silver); position: relative; transition: background 0.3s, color 0.3s; }
.country-grid li::before { content: '▸'; color: var(--electric); margin-right: 0.6em; font-size: 0.8em; }
.country-grid li:hover { background: var(--navy-800); color: var(--white); }

/* ===================== SERVICES ===================== */
.services { border-top: 1px solid var(--line); }
.service-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.service { display: grid; grid-template-columns: 90px 1fr; gap: clamp(16px, 3vw, 48px); padding: clamp(26px, 3vw, 40px) 0; border-bottom: 1px solid var(--line); align-items: start; transition: padding-left 0.35s var(--ease); }
.service:hover { padding-left: 14px; }
.service-no { font-family: var(--font-mono); font-size: 0.9rem; letter-spacing: 0.1em; color: var(--electric); padding-top: 6px; }
.service h3 { font-family: var(--font-display); font-weight: 500; font-size: clamp(1.2rem, 2vw, 1.6rem); color: var(--white); margin-bottom: 0.5rem; }
.service p { color: var(--steel); }

/* ===================== WHY ===================== */
.why { border-top: 1px solid var(--line); background: linear-gradient(180deg, var(--navy-900), var(--navy-950)); }
.why-grid { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.why-grid li { background: var(--navy-900); padding: 28px 26px; display: flex; align-items: flex-start; gap: 0.9em; font-size: 0.98rem; color: var(--silver); line-height: 1.45; }
.why-grid .tick { width: 22px; height: 1px; margin-top: 0.85em; flex-shrink: 0; }

/* ===================== CONTACT ===================== */
.contact { border-top: 1px solid var(--line); }
.contact-grid { align-items: start; }
.contact-meta { list-style: none; margin-top: 2.2rem; border-top: 1px solid var(--line); }
.contact-meta li { display: grid; grid-template-columns: 130px 1fr; gap: 1rem; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 0.95rem; color: var(--silver); }
.contact-meta span { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--steel-dim); align-self: center; }
.contact-tagline { font-family: var(--font-display); font-style: italic; font-weight: 300; color: var(--silver); margin-top: 1.8rem; font-size: 1.05rem; }

.contact-form { background: var(--navy-850); border: 1px solid var(--line); padding: clamp(28px, 4vw, 48px); }
.field { margin-bottom: 1.5rem; }
.field label { display: block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--steel); margin-bottom: 0.7rem; }
.field input, .field textarea {
  width: 100%; background: var(--navy-950); border: 1px solid var(--line); color: var(--white);
  font-family: var(--font-body); font-size: 0.98rem; padding: 13px 16px; transition: border-color 0.25s, background 0.25s; resize: vertical;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--electric); background: var(--navy-900); }
.field input::placeholder, .field textarea::placeholder { color: var(--steel-dim); }
.form-status { font-family: var(--font-mono); font-size: 0.82rem; margin-top: 1rem; min-height: 1.2em; }
.form-status.ok { color: var(--electric); }
.form-status.err { color: #ff8080; }

/* ===================== FOOTER ===================== */
.site-footer { border-top: 1px solid var(--line); padding: clamp(48px, 7vw, 80px) 0 40px; background: var(--navy-950); }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; align-items: start; }
.footer-logo { height: 48px; margin-bottom: 1.2rem; }
.footer-brand p { color: var(--steel-dim); max-width: 44ch; font-size: 0.92rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.6rem; justify-content: flex-end; }
.footer-nav a { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); transition: color 0.25s; }
.footer-nav a:hover { color: var(--electric); }
.footer-legal { grid-column: 1 / -1; margin-top: 2.4rem; padding-top: 1.8rem; border-top: 1px solid var(--line); font-size: 0.78rem; color: var(--steel-dim); max-width: 90ch; line-height: 1.6; }

/* ===================== REVEAL ANIMATION ===================== */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-streaks, .scroll-cue span { animation: none; }
  html { scroll-behavior: auto; }
  .banner { background-attachment: scroll; }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .country-grid { grid-template-columns: repeat(3, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .nav { position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: flex-start; gap: 0; background: rgba(6,12,34,0.97); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); padding: 8px var(--gutter) 24px; transform: translateY(-120%); transition: transform 0.4s var(--ease); }
  .nav.open { transform: translateY(0); }
  .nav a { width: 100%; padding: 16px 0; border-bottom: 1px solid var(--line); }
  .nav-cta { border: 0; padding: 16px 0; }
  .nav-toggle { display: block; }
  .nav-toggle.open span:nth-child(1){ top:10px; transform: rotate(45deg); }
  .nav-toggle.open span:nth-child(2){ opacity: 0; }
  .nav-toggle.open span:nth-child(3){ top:10px; transform: rotate(-45deg); }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-2-rev .expertise-copy { order: 0; }
  .card-grid { grid-template-columns: 1fr; }
  .tag-list, .country-grid, .why-grid { grid-template-columns: 1fr; }
  .service { grid-template-columns: 60px 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-nav { justify-content: flex-start; }
  .banner { background-attachment: scroll; }
  .hero-streaks { opacity: 0.5; right: -10%; }
}

/* ===== Back to top ===== */
.to-top {
  position: fixed;
  right: clamp(16px, 3vw, 30px);
  bottom: clamp(16px, 3vw, 30px);
  z-index: 60;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(11, 10, 41, 0.55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--steel);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease),
    visibility 0.4s var(--ease), color 0.25s var(--ease),
    border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.to-top svg { width: 16px; height: 16px; display: block; }
.to-top.is-visible { opacity: 0.6; visibility: visible; transform: translateY(0); }
.to-top.is-visible:hover {
  opacity: 1;
  color: var(--white);
  border-color: var(--electric);
  background: var(--electric-soft);
  transform: translateY(-2px);
}
.to-top:focus-visible {
  outline: none;
  opacity: 1;
  color: var(--white);
  border-color: var(--electric);
  box-shadow: 0 0 0 3px var(--electric-soft);
}
@media (prefers-reduced-motion: reduce) {
  .to-top { transition: opacity 0.2s linear, visibility 0.2s linear; transform: none; }
  .to-top.is-visible { transform: none; }
}