/* =====================================================
   kueblerit — Custom dark-tech theme CSS
   Built on top of Bootstrap 5
   ===================================================== */

/* ── Design Tokens ──────────────────────────────────── */
:root {
  --ki-bg:           #0d1117;
  --ki-bg-surface:   #161b22;
  --ki-bg-elevated:  #1c2230;
  --ki-accent:       #00e5ff;
  --ki-accent-dim:   #00b4c8;
  --ki-text:         #e6edf3;
  --ki-text-muted:   #8b949e;
  --ki-border:       rgba(0, 229, 255, 0.12);
  --ki-shadow:       0 4px 24px rgba(0, 0, 0, 0.45);
  --ki-radius:       0.5rem;
  --ki-transition:   0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--ki-bg);
  color: var(--ki-text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--ki-accent);
}
a:hover {
  color: var(--ki-accent-dim);
}

/* ── Google Fonts import ────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;800&display=swap');

/* ── Navbar ─────────────────────────────────────────── */
#mainNav {
  background-color: #161b22 !important;
  border-bottom: 1px solid var(--ki-border);
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

#mainNav .navbar-brand {
  text-decoration: none;
}

.brand-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--ki-accent);
  letter-spacing: -0.04em;
  font-style: italic;
}

.brand-sub {
  color: var(--ki-text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

#mainNav .nav-link {
  color: var(--ki-text) !important;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.4rem 0.75rem;
  border-radius: var(--ki-radius);
  transition: color var(--ki-transition), background var(--ki-transition);
}

#mainNav .nav-link:hover,
#mainNav .nav-link.active {
  color: var(--ki-accent) !important;
  background: rgba(0, 229, 255, 0.07);
}

/* ── Hero ───────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 62vh;
  overflow: hidden;
  background:
    url('/images/hero-bg.jpg') center center / cover no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    rgba(13, 17, 23, 0.92) 40%,
    rgba(13, 17, 23, 0.55) 100%
  );
}

.hero .container {
  padding-top: 5rem;
  padding-bottom: 5rem;
  z-index: 1;
}

.hero-headline {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: clamp(0.85rem, 2vw, 1rem);
  font-weight: 600;
  color: var(--ki-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-lead {
  border-left: 3px solid var(--ki-accent);
  padding-left: 1rem;
  color: var(--ki-text);
  font-size: 0.95rem;
  max-width: 480px;
  margin-bottom: 1.5rem;
  font-style: normal;
}

/* ── CTA Button ─────────────────────────────────────── */
.btn-accent {
  background-color: var(--ki-accent);
  color: #0d1117;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  padding: 0.65rem 1.4rem;
  border-radius: 0.25rem;
  transition: background var(--ki-transition), transform var(--ki-transition), box-shadow var(--ki-transition);
}

.btn-accent:hover {
  background-color: var(--ki-accent-dim);
  color: #0d1117;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 229, 255, 0.3);
}

.btn-outline-accent {
  background: transparent;
  color: var(--ki-accent);
  border: 1px solid var(--ki-accent);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  padding: 0.4rem 1rem;
  border-radius: 0.25rem;
  transition: all var(--ki-transition);
}

.btn-outline-accent:hover {
  background: var(--ki-accent);
  color: #0d1117;
}

/* ── Dark Sections ──────────────────────────────────── */
.section-dark {
  background-color: var(--ki-bg);
}

.section-title {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ki-text);
  position: relative;
  padding-bottom: 0.6rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 2.5rem;
  height: 2px;
  background: var(--ki-accent);
}

/* ── Cards (Expertise & Projects) ───────────────────── */
.ki-card {
  background-color: var(--ki-bg-surface);
  border: 1px solid var(--ki-border);
  border-radius: var(--ki-radius);
  transition: transform var(--ki-transition), border-color var(--ki-transition), box-shadow var(--ki-transition);
}

.ki-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: var(--ki-shadow);
}

.ki-card--featured {
  border-color: var(--ki-accent);
  border-top-width: 2px;
}

.ki-card--project.ki-card--featured {
  box-shadow: 0 0 0 1px var(--ki-accent), var(--ki-shadow);
}

.ki-icon {
  font-size: 1.8rem;
  color: var(--ki-accent);
  display: block;
}

.card-heading {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ki-text);
  margin-bottom: 0.5rem;
}

.card-text {
  font-size: 0.875rem;
  color: var(--ki-text-muted) !important;
}

.project-meta {
  background: var(--ki-bg-elevated);
  border-radius: 0.25rem;
  border: 1px solid var(--ki-border);
  font-size: 0.8rem;
  color: var(--ki-text-muted);
}

/* ── Contact Form ───────────────────────────────────── */
.contact-form {
  background-color: var(--ki-bg-surface);
  border: 1px solid var(--ki-border);
  border-radius: var(--ki-radius);
  padding: 2rem;
}

.ki-input {
  background-color: var(--ki-bg-elevated) !important;
  border: 1px solid var(--ki-border) !important;
  border-radius: 0.25rem !important;
  color: var(--ki-text) !important;
  transition: border-color var(--ki-transition), box-shadow var(--ki-transition);
}

.ki-input:focus {
  border-color: var(--ki-accent) !important;
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.18) !important;
  outline: none;
}

.ki-input::placeholder {
  color: var(--ki-text-muted);
}

.form-label {
  color: var(--ki-text-muted);
  font-size: 0.8rem;
  margin-bottom: 0.3rem;
  letter-spacing: 0.05em;
}

/* ── Footer ─────────────────────────────────────────── */
.site-footer {
  background-color: #161b22;
  border-top: 1px solid var(--ki-border);
  color: var(--ki-text-muted);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--ki-text-muted);
  transition: color var(--ki-transition);
}

.site-footer a:hover {
  color: var(--ki-accent);
}

/* ── Text utilities ─────────────────────────────────── */
.text-accent {
  color: var(--ki-accent) !important;
}

.text-muted {
  color: var(--ki-text-muted) !important;
}

/* ── Responsive tweaks ──────────────────────────────── */
@media (max-width: 768px) {
  .hero {
    min-height: 80vh;
  }

  .hero-headline {
    font-size: 2rem;
  }

  .hero-lead {
    max-width: 100%;
  }

  .contact-form {
    padding: 1.25rem;
  }
}