/* ============================================
   Optimum Horizons - Technology Services
   ============================================ */

:root {
  /* Core palette - deep navy-black base */
  --bg-dark: hsl(222, 47%, 5%);
  --bg-card: hsla(222, 40%, 8%, 0.6);
  --bg-elevated: hsla(222, 35%, 12%, 0.5);
  --text-primary: hsl(210, 40%, 98%);
  --text-secondary: hsl(215, 20%, 70%);
  --text-muted: hsl(215, 15%, 55%);
  
  /* Primary accent - bright cyan/teal (buttons, glows, highlights) */
  --accent-primary: hsl(190, 92%, 52%);
  --accent-glow: hsla(190, 92%, 52%, 0.2);
  
  /* Secondary accent - soft violet (icons, gradients, sparingly) */
  --accent-secondary: hsl(262, 83%, 66%);
  
  /* Borders & surfaces */
  --border-subtle: hsla(215, 20%, 70%, 0.12);
  --border-accent: hsla(190, 92%, 52%, 0.5);
  
  /* Typography */
  --font-main: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Spacing & layout */
  --container-max: 1140px;
  --section-padding: clamp(4rem, 10vw, 7rem);
  --header-height: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ========== Header ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: hsla(222, 47%, 5%, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.3s, border-color 0.3s;
}

.header.scrolled {
  background: hsla(222, 47%, 5%, 0.95);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 2.25rem;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(hsla(215, 20%, 70%, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, hsla(215, 20%, 70%, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 50%;
  height: 60%;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  filter: blur(60px);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent-primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s ease-out;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s ease-out 0.1s both;
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2.5rem;
  animation: fadeUp 0.8s ease-out 0.2s both;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  animation: fadeUp 0.8s ease-out 0.3s both;
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), hsl(190, 85%, 45%));
  color: hsl(222, 47%, 5%);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-subtle);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-full {
  width: 100%;
}

/* ========== Section styles ========== */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ========== Services ========== */
.services {
  padding: var(--section-padding) 0;
  background: var(--bg-dark);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s;
}

.service-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--accent-glow);
}

.service-icon {
  width: 56px;
  height: 56px;
  color: var(--accent-secondary);
  margin-bottom: 1.5rem;
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ========== About ========== */
.about {
  padding: var(--section-padding) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-content .section-tag {
  text-align: left;
}

.about-content .section-title {
  text-align: left;
  margin-bottom: 1.5rem;
}

.about-text {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.about-features {
  list-style: none;
  margin-top: 2rem;
}

.about-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}

.about-features .check {
  color: var(--accent-primary);
  font-weight: 700;
}

.about-visual {
  display: flex;
  gap: 1.5rem;
}

.visual-card {
  flex: 1;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s;
}

.visual-card:hover {
  border-color: var(--border-accent);
}

.visual-card:first-child .visual-stat {
  color: var(--accent-primary);
}

.visual-card:last-child .visual-stat {
  color: var(--accent-secondary);
}

.visual-stat {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.visual-card span {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ========== Solutions ========== */
.solutions {
  padding: var(--section-padding) 0;
  background: var(--bg-dark);
}

.solutions-list {
  display: grid;
  gap: 1.5rem;
}

.solution-item {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 1.5rem 2rem;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2rem;
  align-items: center;
  transition: all 0.3s;
}

.solution-item:hover {
  border-color: var(--border-accent);
}

.solution-label {
  font-weight: 600;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.solution-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ========== Contact ========== */
.contact {
  padding: var(--section-padding) 0;
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-content .section-title {
  text-align: left;
  margin-bottom: 1rem;
}

.contact-content p {
  color: var(--text-secondary);
}

.contact-form-wrapper {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-elevated);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ========== Footer ========== */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.footer .logo {
  justify-content: center;
  margin-bottom: 1rem;
}

.footer .logo-img {
  height: 2.75rem;
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ========== Responsive ========== */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links.active {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: hsla(222, 47%, 5%, 0.95);
    backdrop-filter: blur(16px);
    padding: 2rem;
    border-bottom: 1px solid var(--border-subtle);
    gap: 1rem;
  }

  .about-grid,
  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .solution-item {
    grid-template-columns: 1fr;
  }

  .about-visual {
    flex-direction: column;
  }
}

@media (max-width: 600px) {
  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }
}