/*
  Nivaro — IT Consulting Landing Page
  Tech: Pure CSS (no frameworks).
*/

/* CSS Variables: brand and UI tokens */
:root {
  --bg: #0b1020;
  --panel: #0f152b;
  --elev: #121a35;
  --text: #e5ecff;
  --muted: #a6b0cc;

  --primary: #0ea5e9; /* sky-500 */
  --primary-600: #0284c7;
  --accent: #22c55e;  /* green-500 */

  --success: #16a34a;
  --danger: #ef4444;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --ring: 0 0 0 3px color-mix(in oklab, var(--primary) 22%, transparent);

  --container: 1100px;
  --container-pad: clamp(16px, 4.5vw, 28px);
  --section-y: clamp(68px, 12vw, 120px);
  --grid-gap: clamp(16px, 4vw, 28px);
}

/* Reset & base */
* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 1200px at 10% -10%, #132040 0%, transparent 45%),
              radial-gradient(900px 900px at 100% 10%, #0c1a33 0%, transparent 45%),
              var(--bg);
  line-height: 1.6;
  padding-bottom: env(safe-area-inset-bottom);
}

.container {
  width: 100%;
  max-width: var(--container);
  padding-left: calc(var(--container-pad) + env(safe-area-inset-left));
  padding-right: calc(var(--container-pad) + env(safe-area-inset-right));
  margin: 0 auto;
}

.section { padding: var(--section-y) 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.00)); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg) 92%, #0b1020 8%);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: saturate(130%) blur(10px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: clamp(56px, 6.5vw, 72px); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: 0.2px; }
.brand-mark { color: var(--primary); }
.brand-text { font-size: 18px; }

.nav { position: relative; }
.nav-list { display: flex; align-items: center; gap: 22px; list-style: none; padding: 0; margin: 0; }
.nav-list a { color: var(--text); text-decoration: none; opacity: 0.9; }
.nav-list a:hover { color: var(--text); opacity: 1; }
.nav-cta .btn { padding: 10px 14px; }
.nav-lang select { background: var(--panel); color: var(--text); border: 1px solid rgba(255,255,255,0.18); border-radius: 999px; padding: 8px 12px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.nav-toggle { display: none; border: 0; background: transparent; color: var(--text); cursor: pointer; padding: 10px; position: relative; }
.nav-toggle .icon-close { display: none; }
.nav-toggle.is-open .icon-menu { display: none; }
.nav-toggle.is-open .icon-close { display: inline-block; }
@media (max-width: 860px) { .nav-toggle { height: 44px; width: 44px; padding: 0; display: inline-grid; place-items: center; } }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-list { position: absolute; right: 0; top: 60px; background: var(--panel); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-sm); padding: 14px; gap: 12px; flex-direction: column; align-items: flex-start; min-width: 220px; box-shadow: var(--shadow); display: none; }
  .nav-list.open { display: flex; }
}

/* Hero */
.grid-2 { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: var(--grid-gap); align-items: center; }
@media (max-width: 980px) { .grid-2 { grid-template-columns: 1fr; } }

.hero h1 { font-size: clamp(32px, 5vw, 50px); line-height: 1.08; margin: 0 0 14px; }
.hero p { font-size: 18px; color: var(--muted); margin: 0 0 22px; }
.hero-ctas { display: flex; gap: 12px; margin: 18px 0 10px; }
.hero-points { margin: 16px 0 0; padding: 0; list-style: none; color: var(--muted); display: grid; gap: 6px; }

.hero-art .art-card { position: relative; background: var(--panel); border: 1px solid rgba(255,255,255,0.06); border-radius: 18px; padding: 8px; box-shadow: var(--shadow); }
.art-gradient { position: absolute; inset: 0; border-radius: 18px; background: radial-gradient(600px 300px at 70% 20%, color-mix(in oklab, var(--primary) 22%, transparent) 0%, transparent 60%), radial-gradient(600px 300px at 30% 80%, color-mix(in oklab, var(--accent) 22%, transparent) 0%, transparent 60%); filter: blur(24px); opacity: 0.65; }
.art-grid { display: block; width: 100%; height: auto; border-radius: 12px; }

/* Section heads */
.section-head { text-align: center; max-width: 760px; margin: 0 auto 28px; }
.section-head h2 { margin: 0 0 6px; font-size: clamp(26px, 4vw, 36px); }
.section-head p { margin: 0; color: var(--muted); }

/* Services */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--grid-gap); margin-top: 24px; }
@media (max-width: 980px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .services-grid { grid-template-columns: 1fr; } }

.card { background: linear-gradient(180deg, var(--panel), var(--elev)); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius); padding: clamp(14px, 2.5vw, 18px); box-shadow: var(--shadow); transition: transform .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-2px); border-color: color-mix(in oklab, var(--primary) 35%, rgba(255,255,255,0.08)); }
.card .icon { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: color-mix(in oklab, var(--primary) 15%, transparent); color: var(--primary); margin-bottom: 10px; }
.card h3 { margin: 6px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }

/* About */
.about-card { background: linear-gradient(180deg, var(--panel), var(--elev)); border: 1px solid rgba(255,255,255,0.08); border-radius: 18px; padding: 18px; box-shadow: var(--shadow); position: relative; }
.badge { position: absolute; top: -10px; right: -10px; background: var(--accent); color: #052910; font-weight: 700; padding: 6px 10px; border-radius: 999px; font-size: 12px; letter-spacing: .4px; box-shadow: 0 6px 18px rgba(34,197,94,.35); }
.about-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(8px, 2vw, 12px); }
.metric { display: block; font-weight: 800; font-size: 22px; }
.label { color: var(--muted); font-size: 12px; }

.checklist { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 8px; }
.checklist li { position: relative; padding-left: 24px; }
.checklist li::before { content: ""; width: 16px; height: 16px; border-radius: 4px; position: absolute; left: 0; top: 4px; background: color-mix(in oklab, var(--accent) 25%, transparent); border: 1px solid color-mix(in oklab, var(--accent) 55%, transparent); box-shadow: inset 0 0 0 3px rgba(255,255,255,0.06); }

/* Contact */
.form { display: grid; gap: 12px; }
.field { display: grid; gap: 6px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--grid-gap); }
@media (max-width: 640px) { .field-row { grid-template-columns: 1fr; } }
.field label { font-size: 14px; color: var(--text); }
.field input, .field select, .field textarea {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text);
  border-radius: 12px;
  padding: 12px 12px;
  min-height: 44px;
  outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus { box-shadow: var(--ring); border-color: color-mix(in oklab, var(--primary) 50%, rgba(255,255,255,0.08)); }
.error { color: var(--danger); min-height: 16px; }
.form-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.form-status { color: var(--muted); margin-top: 4px; min-height: 20px; }

.card.info .list { list-style: none; padding: 0; margin: 8px 0 12px; color: var(--muted); display: grid; gap: 6px; }
.contact-block { display: grid; gap: 4px; }
.link { color: var(--text); text-decoration: none; border-bottom: 1px dashed rgba(255,255,255,0.25); width: fit-content; }
.link:hover { color: var(--text); border-bottom-color: var(--primary); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 999px; padding: 12px 18px; border: 1px solid rgba(255,255,255,0.1); text-decoration: none; color: var(--text); font-weight: 600; cursor: pointer; min-height: 44px; }
.btn-primary { background: linear-gradient(180deg, color-mix(in oklab, var(--primary) 60%, #ffffff 0%), var(--primary-600)); border: 0; box-shadow: 0 10px 20px rgba(14,165,233,.25); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,0.18); }
.btn-ghost:hover { border-color: var(--primary); }

/* Footer */
.site-footer { border-top: 1px solid rgba(255,255,255,0.06); background: color-mix(in oklab, var(--bg) 94%, #0b1020 6%); padding: 0px 24px;}
.footer-inner { display: flex; align-items: center; justify-content: space-between; padding: clamp(14px, 3vw, 20px) 0; gap: 12px; }
.foot-right { display: flex; gap: 16px; }
.foot-right a { color: var(--muted); text-decoration: none; }
.foot-right a:hover { color: var(--text); }
.muted { color: var(--muted); }

/* Reveal Animations */
.reveal { opacity: 0; transform: translateY(14px); }
.reveal.in { opacity: 1; transform: translateY(0); transition: opacity .7s ease, transform .7s ease; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 90; opacity: 0; transition: opacity .25s ease; }
.modal { position: fixed; inset: 0; display: grid; place-items: center; z-index: 95; }
.modal[hidden], .modal-overlay[hidden] { display: none; }
.modal-content { width: min(92vw, 440px); background: var(--panel); border: 1px solid rgba(255,255,255,.1); border-radius: 16px; box-shadow: var(--shadow); padding: 18px; }
.modal-close { position: absolute; right: 14px; top: 10px; background: transparent; border: 0; color: var(--text); font-size: 22px; cursor: pointer; }
.modal-actions { display: flex; justify-content: flex-end; margin-top: 12px; }