/* =========================================================
   Aktion E.I.R.L. — site styles
   Brand colors live in :root — adjust to match the logo.
   ========================================================= */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f6fa;
  --color-ink: #101828;
  --color-ink-soft: #475467;
  --color-primary: #0b2545;      /* deep navy — from logo dark tones */
  --color-primary-soft: #13315c;
  --color-accent: #0088d4;       /* azure — from logo mark (#00a0f0) */
  --color-accent-bright: #00a0f0;
  --color-accent-soft: #e1f2fd;
  --color-border: #e4e7ec;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px rgba(16, 24, 40, .06);
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

.container {
  width: min(1120px, 100% - 3rem);
  margin-inline: auto;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  text-decoration: none;
}

.brand-mark {
  height: 40px;
  width: auto;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--color-primary);
}

.brand-name-light { color: #fff; }

.main-nav {
  display: flex;
  gap: 1.75rem;
  margin-left: auto;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-ink-soft);
  font-weight: 500;
  font-size: .95rem;
  transition: color .15s;
}

.main-nav a:hover { color: var(--color-primary); }

.main-nav .nav-cta {
  color: var(--color-accent);
  font-weight: 600;
}

.lang-switcher {
  display: flex;
  gap: .25rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: .2rem;
}

.lang-link {
  text-decoration: none;
  font-size: .78rem;
  font-weight: 600;
  color: var(--color-ink-soft);
  padding: .25rem .6rem;
  border-radius: 999px;
  transition: background .15s, color .15s;
}

.lang-link:hover { color: var(--color-primary); }

.lang-link.active {
  background: var(--color-primary);
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-soft) 60%, #1d4272 100%);
  color: #fff;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: 7rem 0 7.5rem;
  max-width: 780px;
}

.hero-badge {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .22);
  padding: .35rem .9rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, .82);
  max-width: 620px;
  margin-bottom: 2.25rem;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-glow {
  position: absolute;
  right: -180px;
  top: -120px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 160, 240, .4) 0%, transparent 65%);
  pointer-events: none;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: .98rem;
  padding: .8rem 1.7rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: transform .12s, box-shadow .12s, background .15s;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 136, 212, .35);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0, 136, 212, .45); }

.btn-primary:disabled { opacity: .6; cursor: wait; transform: none; }

.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .35);
}

.btn-ghost:hover { background: rgba(255, 255, 255, .1); }

/* ---------- Sections ---------- */

.section { padding: 5.5rem 0; }

.section-alt { background: var(--color-bg-alt); }

.section-head {
  max-width: 640px;
  margin-bottom: 3rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: .6rem;
  color: var(--color-primary);
}

.section-head p { color: var(--color-ink-soft); font-size: 1.05rem; }

/* ---------- Grids & cards ---------- */

.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: transform .15s, box-shadow .15s;
}

.card:hover { transform: translateY(-4px); box-shadow: 0 4px 8px rgba(16,24,40,.06), 0 16px 36px rgba(16,24,40,.1); }

.card-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  margin-bottom: 1.1rem;
  flex-shrink: 0;
}

.card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: .5rem; color: var(--color-primary); }
.card p { color: var(--color-ink-soft); font-size: .95rem; }

.project-card { display: flex; gap: 1.25rem; align-items: flex-start; }
.project-card .card-icon { margin-bottom: 0; }

.tags { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: .9rem; }

.tag {
  font-size: .75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: .2rem .65rem;
  border-radius: 999px;
}

.projects-note {
  margin-top: 2rem;
  text-align: center;
  font-size: .88rem;
  color: var(--color-ink-soft);
  font-style: italic;
}

/* ---------- Approach ---------- */

.approach-item { padding: .5rem 0; }

.approach-num {
  font-size: .85rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: .1em;
}

.approach-item h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: .5rem 0;
}

.approach-item p { color: var(--color-ink-soft); font-size: .95rem; }

/* ---------- Contact form ---------- */

.contact-inner { max-width: 720px; }

#contact-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-field { display: flex; flex-direction: column; gap: .4rem; }

.form-field label { font-weight: 600; font-size: .9rem; color: var(--color-primary); }

.form-field input,
.form-field textarea {
  font-family: inherit;
  font-size: .98rem;
  color: var(--color-ink);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: .75rem 1rem;
  transition: border-color .15s, box-shadow .15s;
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

#contact-form .btn { align-self: flex-start; }

.form-status { min-height: 1.4rem; font-size: .92rem; font-weight: 500; }
.form-status.ok { color: #067647; }
.form-status.err { color: #d92d20; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, .75);
  padding: 3rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-brand p { max-width: 340px; font-size: .9rem; margin-top: 1rem; }

.footer-meta { text-align: right; font-size: .88rem; }
.footer-meta p + p { margin-top: .4rem; }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .header-inner { gap: 1rem; }

  .nav-toggle { display: flex; }

  .main-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    display: none;
  }

  .main-nav.open { display: flex; }

  .main-nav a {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-border);
  }

  .lang-switcher { margin-left: auto; }

  .hero-inner { padding: 4.5rem 0 5rem; }

  .grid-4 { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; }
  .footer-meta { text-align: left; }
}