/* =========================================================
   ATIS MARS — Premium Dark Design System (blue)
   Navy base · sky accent · Space Grotesk + Inter
   ========================================================= */

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

:root {
  /* Surfaces — navy */
  --bg:          #0B1120;
  --surface:     #111A2E;
  --surface-2:   #131E36;
  --surface-3:   #18244180;   /* glass panel */

  /* Lines */
  --border:        rgba(148,163,184,0.12);
  --border-strong: rgba(148,163,184,0.24);

  /* Text (all pairs >= WCAG AA on --bg / surfaces) */
  --text:        #E8EEF7;   /* primary  ~15:1 */
  --text-muted:  #9FB0C8;   /* secondary ~7:1 */
  --text-dim:    #6B7C97;   /* tertiary  ~4.6:1 */

  /* Brand — sky blue */
  --accent:        #38BDF8;
  --accent-strong: #0EA5E9;
  --accent-ink:    #07121F;
  --accent-soft:   rgba(56,189,248,0.12);

  --success: #4ADE80;
  --error:   #F87171;

  /* Type */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;

  /* Radii / shadow */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset,
                 0 18px 40px -24px rgba(0,0,0,0.85);
  --shadow-glow: 0 12px 44px -12px rgba(56,189,248,0.5);

  /* Layout */
  --gutter: 60px;
  --maxw: 1200px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Ambient cool depth */
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(900px 600px at 80% -10%, rgba(56,189,248,0.10), transparent 60%),
    radial-gradient(700px 500px at -5% 105%, rgba(14,165,233,0.05), transparent 60%);
  pointer-events: none; z-index: 0;
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============================ NAV ============================ */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--gutter); height: 72px;
  background: rgba(11,17,32,0.72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.logo { display: flex; align-items: baseline; gap: 9px; text-decoration: none; }
.logo-atis { font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; letter-spacing: 0.04em; color: var(--text); }
.logo-mars { font-family: var(--font-display); font-weight: 400; font-size: 1.25rem; letter-spacing: 0.1em; color: var(--text-muted); }
.logo-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); margin-bottom: 2px; box-shadow: 0 0 12px var(--accent); }

nav ul { list-style: none; display: flex; gap: 36px; align-items: center; }
nav ul a {
  font-family: var(--font-body); font-size: 0.9rem;
  font-weight: 500; letter-spacing: 0.01em;
  color: var(--text-muted); text-decoration: none;
  transition: color 0.2s; position: relative; padding: 6px 0;
}
nav ul a:hover { color: var(--text); }
nav ul a::after {
  content: ''; position: absolute; left: 0; bottom: -2px;
  height: 2px; width: 0; background: var(--accent);
  transition: width 0.25s ease;
}
nav ul a:hover::after { width: 100%; }

/* Hamburger */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  background: transparent; border: 1px solid var(--border-strong);
  border-radius: var(--r-sm); cursor: pointer;
  color: var(--text);
}
.nav-toggle svg { width: 22px; height: 22px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* ============================ HERO ============================ */
.hero {
  position: relative; min-height: 90vh;
  display: flex; align-items: center; justify-content: flex-start;
  padding: 130px var(--gutter) 90px; overflow: hidden; z-index: 1;
}
/* Image layer — blue-toned */
.hero::before {
  content: '';
  position: absolute; inset: 0; z-index: -2;
  background: url('mars.png?v=2') no-repeat center right / cover; /* fallback */
  background: image-set(
      url('mars.webp?v=2') type('image/webp'),
      url('mars.png?v=2') type('image/png')
    ) no-repeat center right / cover;
  filter: hue-rotate(195deg) saturate(0.8) brightness(0.92);
}
/* Scrim: dark on the left for text, scene visible on the right,
   fading into the page at the bottom. */
.hero::after {
  content: '';
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(90deg, var(--bg) 4%, rgba(11,17,32,0.82) 38%, rgba(11,17,32,0.30) 66%, rgba(11,17,32,0.55) 100%),
    linear-gradient(180deg, rgba(11,17,32,0.35) 0%, transparent 28%, transparent 64%, var(--bg) 100%);
}
.hero-glow {
  position: absolute; top: -120px; right: -90px;
  width: 640px; height: 640px; border-radius: 50%;
  background: radial-gradient(circle, rgba(56,189,248,0.16) 0%, transparent 62%);
  pointer-events: none; animation: pulse 9s ease-in-out infinite; z-index: -1;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(1.12); }
}

.hero-content { position: relative; z-index: 1; max-width: 820px; margin: 0; margin-right: auto; text-align: left; }

.hero-tag {
  font-family: var(--font-display); font-size: 0.8rem; font-weight: 500;
  letter-spacing: 0.16em; color: var(--accent); text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 12px; margin-bottom: 26px;
  padding: 7px 16px 7px 14px;
  background: var(--accent-soft); border: 1px solid rgba(56,189,248,0.25);
  border-radius: 999px;
  opacity: 0; animation: fadeUp 0.7s 0.15s forwards;
}
.hero-tag::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }

.hero h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.6rem, 6vw, 4.9rem); line-height: 1.02;
  letter-spacing: -0.022em; color: var(--text); max-width: 880px;
  margin-bottom: 24px; opacity: 0; animation: fadeUp 0.8s 0.3s forwards;
  text-shadow: 0 2px 30px rgba(0,0,0,0.55);
}
.hero h1 em { font-style: normal; font-weight: 400; color: var(--accent); }

.hero-sub {
  font-size: 1.12rem; line-height: 1.7; color: var(--text-muted);
  max-width: 540px; margin-bottom: 36px;
  opacity: 0; animation: fadeUp 0.8s 0.45s forwards;
}
.hero-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; opacity: 0; animation: fadeUp 0.8s 0.6s forwards; }

.hero-meta {
  display: flex; flex-wrap: wrap; gap: 22px; margin-top: 38px;
  opacity: 0; animation: fadeUp 0.8s 0.75s forwards;
}
.hero-meta span {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 0.86rem; font-weight: 500; color: var(--text-muted);
}
.hero-meta span::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================ BUTTONS ============================ */
.btn-primary {
  font-family: var(--font-body); font-size: 0.95rem; font-weight: 600;
  letter-spacing: 0.01em; color: var(--accent-ink);
  background: linear-gradient(135deg, #7DD3FC 0%, var(--accent) 45%, var(--accent-strong) 100%);
  padding: 14px 30px; text-decoration: none; border: none; cursor: pointer;
  border-radius: var(--r-sm); display: inline-flex; align-items: center; gap: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); filter: brightness(1.05); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  font-family: var(--font-body); font-size: 0.95rem; font-weight: 500;
  color: var(--text); text-decoration: none;
  display: inline-flex; align-items: center; gap: 8px; padding: 14px 8px;
  transition: color 0.2s;
}
.btn-ghost::after { content: '→'; transition: transform 0.2s; }
.btn-ghost:hover { color: var(--accent); }
.btn-ghost:hover::after { transform: translateX(5px); }

/* ============================ PARTNERS / CAROUSEL ============================ */
.partners {
  position: relative; z-index: 1;
  background: #ffffff;
  padding: 24px 0;
  overflow: hidden;
  border-top: 1px solid rgba(0,0,0,0.06);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.partners::before, .partners::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 88px; z-index: 2; pointer-events: none;
}
.partners::before { left: 0; background: linear-gradient(90deg, #fff, transparent); }
.partners::after { right: 0; background: linear-gradient(270deg, #fff, transparent); }

.partners-viewport { display: flex; width: max-content; }
.partners-track {
  display: flex; align-items: center; flex-shrink: 0;
  gap: 72px; padding-right: 72px;
  animation: partners-scroll 26s linear infinite;
}
.partners:hover .partners-track { animation-play-state: paused; }
@keyframes partners-scroll { to { transform: translateX(-100%); } }

.partner-item {
  display: inline-flex; align-items: center; gap: 11px;
  min-height: 44px; padding: 6px 4px;
  font-family: var(--font-display); font-weight: 600; font-size: 1.08rem;
  letter-spacing: 0.005em; color: #0B1120; text-decoration: none; white-space: nowrap;
  opacity: 0.74; transition: opacity 0.2s, color 0.2s;
}
a.partner-item:hover { opacity: 1; color: var(--accent-strong); }
.partner-item svg:not(.partner-logo) { width: 26px; height: 26px; flex-shrink: 0; }
.partner-item--logo { opacity: 0.92; }
.partner-item--logo:hover { opacity: 1; }
.partner-logo { height: 34px; width: auto; flex-shrink: 0; display: block; }
.partner-badge { cursor: default; }
.partner-badge svg { color: var(--accent-strong); }

@media (prefers-reduced-motion: reduce) {
  .partners-viewport { width: 100%; }
  .partners-track {
    animation: none; flex-wrap: wrap; justify-content: center;
    gap: 20px 44px; padding-right: 0;
  }
  .partners-track[aria-hidden="true"] { display: none; }
}

/* ============================ SECTIONS ============================ */
section { position: relative; z-index: 1; padding: 110px var(--gutter); }
section > * { max-width: var(--maxw); margin-inline: auto; }

.section-tag {
  font-family: var(--font-display); font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.16em; color: var(--accent); text-transform: uppercase;
  margin-bottom: 18px; display: inline-flex; align-items: center; gap: 12px;
}
.section-tag::before { content: ''; width: 26px; height: 2px; border-radius: 2px; background: var(--accent); }

h2 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.08;
  letter-spacing: -0.015em; color: var(--text); margin-bottom: 20px;
}

/* ============================ SERVICES ============================ */
#services { background: var(--surface); }
.services-header {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin: 0 auto 56px; flex-wrap: wrap; gap: 24px;
}
.services-header p { max-width: 420px; color: var(--text-muted); line-height: 1.7; font-size: 1rem; }

.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  max-width: var(--maxw); margin-inline: auto;
}

.service-card {
  background: linear-gradient(180deg, var(--surface-2), rgba(19,30,54,0.7));
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 36px 32px 34px;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.service-card::after {
  content: ''; position: absolute; top: 0; left: 24px; right: 24px;
  height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0; transition: opacity 0.3s ease;
}
.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-card), 0 24px 50px -30px rgba(56,189,248,0.45);
}
.service-card:hover::after { opacity: 1; }

/* Flagship (AI) card — visually elevated */
.service-card--flagship {
  border-color: rgba(56,189,248,0.42);
  background: linear-gradient(180deg, rgba(56,189,248,0.09), var(--surface-2) 55%);
}
.service-card--flagship::after { opacity: 1; }
.service-card--flagship .card-flag {
  color: var(--accent-ink); background: var(--accent); border-color: var(--accent);
}
.service-card--flagship .card-icon {
  background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
  box-shadow: 0 8px 26px -10px rgba(56,189,248,0.6);
}

.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.card-num { font-family: var(--font-display); font-size: 0.82rem; font-weight: 600; color: var(--accent); letter-spacing: 0.08em; }
.card-flag {
  font-size: 0.66rem; font-weight: 600; color: var(--text-muted);
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 5px 11px; border: 1px solid var(--border-strong); border-radius: 999px;
}

.card-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft); border: 1px solid rgba(56,189,248,0.28);
  color: var(--accent); margin-bottom: 22px;
}
.card-icon svg { width: 24px; height: 24px; }

.card-title {
  font-family: var(--font-display); font-weight: 600; font-size: 1.4rem;
  line-height: 1.2; color: var(--text); margin-bottom: 14px; min-height: 3.4rem;
}
.card-desc { font-size: 0.95rem; line-height: 1.7; color: var(--text-muted); margin-bottom: 28px; }

.capabilities-label {
  font-size: 0.66rem; font-weight: 600; color: var(--text-dim);
  letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}
.capabilities-label::before { content: ''; width: 16px; height: 1px; background: var(--border-strong); }
.capabilities { display: flex; flex-wrap: wrap; gap: 8px; }
.cap {
  font-size: 0.78rem; font-weight: 500; color: var(--text-muted);
  padding: 6px 12px; border: 1px solid var(--border);
  border-radius: 999px; background: rgba(255,255,255,0.02);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.cap:hover { color: var(--text); border-color: var(--accent); background: var(--accent-soft); }

/* ============================ WHY US ============================ */
#why { background: var(--bg); }
.why-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; max-width: var(--maxw); margin-inline: auto; }
.why-left p { color: var(--text-muted); line-height: 1.8; font-size: 1.02rem; margin-bottom: 36px; }
.pillars { display: flex; flex-direction: column; gap: 4px; }
.pillar { display: flex; align-items: flex-start; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--border); }
.pillar:first-child { border-top: 1px solid var(--border); }
.pillar-num { font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; color: var(--accent); line-height: 1; min-width: 34px; }
.pillar-text strong { font-family: var(--font-display); font-size: 1.02rem; font-weight: 600; color: var(--text); display: block; margin-bottom: 6px; }
.pillar-text span { font-size: 0.92rem; color: var(--text-muted); line-height: 1.6; }

.tech-box {
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 40px; position: relative; overflow: hidden;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
}
.tech-box::after { content: ''; position: absolute; top: -40px; right: -40px; width: 200px; height: 200px; background: radial-gradient(circle, rgba(56,189,248,0.14), transparent 70%); pointer-events: none; }
.tech-box-label { font-family: var(--font-display); font-size: 0.74rem; font-weight: 500; letter-spacing: 0.14em; color: var(--accent); text-transform: uppercase; margin-bottom: 26px; }
.tech-tags { display: flex; flex-wrap: wrap; gap: 9px; }
.tag {
  font-size: 0.84rem; font-weight: 500; color: var(--text-muted);
  padding: 7px 14px; border: 1px solid var(--border);
  border-radius: 999px; transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.tag:hover { border-color: var(--border-strong); color: var(--text); }
.tag.hot { border-color: rgba(56,189,248,0.3); color: var(--text); background: var(--accent-soft); }
.tag.hot:hover { border-color: var(--accent); }
.tag.deltek { border-color: rgba(159,176,200,0.35); color: var(--text); }
.tag.deltek:hover { border-color: var(--text-muted); background: rgba(255,255,255,0.05); }

/* ============================ CTA ============================ */
#cta { background: var(--surface); text-align: center; padding: 100px var(--gutter); }
.cta-inner { max-width: 720px; margin: 0 auto; }
#cta .section-tag { justify-content: center; }
#cta p { color: var(--text-muted); font-size: 1.08rem; line-height: 1.7; margin-bottom: 40px; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ============================ FOOTER ============================ */
footer {
  position: relative; z-index: 1; padding: 36px var(--gutter);
  border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 18px;
}
.footer-copy { font-size: 0.82rem; color: var(--text-dim); letter-spacing: 0.02em; }
.footer-links { display: flex; gap: 26px; }
.footer-links a { font-size: 0.85rem; font-weight: 500; color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }

/* ============================ CONTACT FORM ============================ */
.contact-form { display: none; max-width: 640px; margin: 36px auto 0; text-align: left; }
.contact-form.active { display: block; animation: fadeUp 0.5s ease forwards; }
.honeypot { position: absolute !important; left: -9999px !important; width: 1px !important; height: 1px !important; opacity: 0 !important; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 18px; }
.form-field label {
  display: block; font-family: var(--font-body); font-size: 0.82rem; font-weight: 500;
  letter-spacing: 0.01em; color: var(--text-muted); margin-bottom: 9px;
}
.captcha-field label span { color: var(--accent); font-weight: 700; }
.form-field input,
.form-field textarea {
  width: 100%; min-height: 48px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-strong); border-radius: var(--r-sm);
  color: var(--text); font-family: var(--font-body); font-size: 1rem; font-weight: 400;
  padding: 12px 14px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none; border-color: var(--accent);
  background: rgba(56,189,248,0.05);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--text-dim); }

.form-actions { display: flex; gap: 14px; margin-top: 22px; flex-wrap: wrap; }
.btn-ghost-light {
  font-family: var(--font-body); font-size: 0.95rem; font-weight: 500;
  color: var(--text-muted); background: transparent;
  border: 1px solid var(--border-strong); border-radius: var(--r-sm);
  padding: 13px 26px; cursor: pointer; min-height: 48px;
  transition: color 0.2s, border-color 0.2s;
}
.btn-ghost-light:hover { border-color: var(--text-muted); color: var(--text); }
#submit-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.form-status { margin-top: 18px; font-size: 0.9rem; font-weight: 500; letter-spacing: 0.01em; min-height: 1.2rem; }
.form-status.success { color: var(--success); }
.form-status.error { color: var(--error); }

/* ============================ RESPONSIVE ============================ */
@media (max-width: 1100px) {
  .services-grid { grid-template-columns: 1fr; }
  .card-title { min-height: auto; }
}

@media (max-width: 900px) {
  :root { --gutter: 22px; }
  .nav-toggle { display: inline-flex; }
  nav ul {
    position: fixed; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(11,17,32,0.97);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 8px 22px 18px;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  nav ul.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  nav ul li { width: 100%; }
  nav ul a { display: block; padding: 14px 4px; border-bottom: 1px solid var(--border); font-size: 1rem; }
  nav ul a::after { display: none; }

  .hero { padding: 120px 22px 80px; min-height: 84vh; }
  .hero::after { background:
      linear-gradient(180deg, rgba(11,17,32,0.55) 0%, rgba(11,17,32,0.78) 50%, var(--bg) 100%); }
  .why-layout { grid-template-columns: 1fr; gap: 44px; }
  .services-header { flex-direction: column; align-items: flex-start; }
  footer { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .form-grid { grid-template-columns: 1fr; }
  .hero-actions { width: 100%; }
  .hero-actions .btn-primary { justify-content: center; width: 100%; }
  .hero-meta { gap: 12px 22px; }
}

/* ============================ REDUCED MOTION ============================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .hero-tag, .hero h1, .hero-sub, .hero-actions, .hero-meta, .contact-form.active { opacity: 1 !important; transform: none !important; }
}