/* =============================================
   HYDRODOMUS — Minimalist Deeptech Design System
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');

/* --- Custom Properties --- */
:root {
  --white:    #FFFFFF;
  --bg:       #0A0F16; /* Deep Dark Navy */
  --bg-alt:   #0D131C;
  --border:   rgba(255, 255, 255, 0.1);
  --border-2: rgba(255, 255, 255, 0.2);

  --navy:     #0D1B2A;
  --navy-2:   #1A2E44;
  
  --blue:       #2563EB; /* Electric Blue */
  --blue-mid:   #3B82F6;
  --blue-light: rgba(37, 99, 235, 0.1);
  --blue-dim:   rgba(37, 99, 235, 0.05);

  --text:   #F9FAFB;
  --text-2: #D1D5DB;
  --text-3: #9CA3AF;
  --text-4: #6B7280;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;

  --section-py: clamp(4rem, 8vw, 8rem);
  --radius:    4px; /* Sharper corners for engineering feel */
  --radius-sm:  2px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; background: #0A0F16; background: var(--bg); }
body {
  font-family: var(--font-body);
  background: #0A0F16; /* Fallback */
  background: var(--bg);
  color: #F9FAFB; /* Fallback */
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: 0.2s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--white);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: 1.5rem;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1.5rem;
}
.section-tag::before {
  content: '';
  width: 24px; height: 1px;
  background: var(--blue);
}
.section-sub {
  font-size: 1.125rem;
  color: var(--text-3);
  max-width: 600px;
  line-height: 1.6;
}

/* =========================================
   NAVIGATION
   ========================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4rem;
  background: rgba(10, 15, 22, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav-logo img { height: 60px; transition: transform 0.3s ease; }
.nav-logo:hover img { transform: scale(1.05); }
.nav-logo-name {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }

.nav-right { display: flex; align-items: center; gap: 1rem; }
.lang-btn {
  font-size: 0.75rem; font-weight: 700; color: var(--text-4);
  padding: 0.25rem 0.5rem; border: 1px solid transparent;
}
.lang-btn.active { color: var(--blue); border-color: var(--blue); }

.hamburger { display: none; flex-direction: column; gap: 6px; }
.hamburger span { width: 24px; height: 1px; background: var(--white); transition: 0.3s; }

/* =========================================
   BUTTONS
   ========================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--font-display);
  font-weight: 600; font-size: 0.875rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
}
.btn-primary:hover { background: var(--blue-mid); transform: translateY(-2px); }
.btn-outline {
  border-color: var(--border-2);
  color: var(--white);
}
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.05); }

/* =========================================
   HERO
   ========================================= */
.hero {
  padding: 12rem 0 8rem;
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(circle at 70% 30%, rgba(37, 99, 235, 0.15) 0%, transparent 50%);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 1;
}
.hero-headline {
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 0.95;
  margin-bottom: 2.5rem;
  max-width: 900px;
}
.hero-headline .accent { color: var(--blue); }
.hero-sub {
  font-size: 1.25rem;
  color: var(--text-2);
  max-width: 540px;
  margin-bottom: 3rem;
}
.hero-ctas { display: flex; gap: 1.5rem; }

/* =========================================
   CARDS & GRIDS
   ========================================= */
.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 2.5rem;
  transition: 0.3s ease;
}
.card:hover { border-color: var(--blue); }

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

/* =========================================
   SECTIONS
   ========================================= */
section { padding: var(--section-py) 0; border-top: 1px solid var(--border); }
.section-dark { background: var(--bg); }
.section-alt { background: var(--bg-alt); }

/* =========================================
   SPECS & TABLES
   ========================================= */
.specs-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
  border: 1px solid var(--border);
}
.spec-item {
  padding: 2rem;
  border: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.spec-label { font-size: 0.8125rem; color: var(--text-4); text-transform: uppercase; letter-spacing: 0.1em; }
.spec-value { font-family: var(--font-display); font-size: 1.25rem; color: var(--white); font-weight: 500; }

/* =========================================
   FOOTER
   ========================================= */
footer {
  padding: 6rem 0 3rem;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 4rem;
  margin-bottom: 4rem;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.footer-logo img { height: 32px; }
.footer-logo span { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--white); }
.footer-text { color: var(--text-4); font-size: 0.875rem; max-width: 300px; line-height: 1.7; }

.footer-col h4 { font-size: 0.75rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-3); margin-bottom: 1.5rem; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col a { font-size: 0.875rem; color: var(--text-4); }
.footer-col a:hover { color: var(--white); }

.footer-bottom {
  padding-top: 2rem; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--text-4);
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1024px) {
  .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .nav { padding: 0 2rem; }
}
@media (max-width: 768px) {
  .nav-links, .nav-right { display: none; }
  .hamburger { display: flex; }
  .hero-headline { font-size: 3.5rem; }
  .grid-2 { grid-template-columns: 1fr; }
  .specs-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* =========================================
   UTILITIES
   ========================================= */
.reveal { opacity: 0; transform: translateY(30px); transition: 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.revealed { opacity: 1; transform: translateY(0); }