/* ==========================================
   DarkSharkChark Den - Modern Shark Theme
   ========================================== */

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

/* Color Palette */
:root {
  --bg-dark: #0a0f1c;        /* Deep ocean background */
  --bg-secondary: #111827;   /* Card and section background */
  --header-bg: #05070d;      /* Nearly black */
  --nav-bg: #0f172a;         /* Dark navy */
  --text-main: #f8fafc;      /* White */
  --text-muted: #cbd5e1;     /* Light gray */
  --accent: #00d4ff;         /* Bright aqua */
  --accent-hover: #38bdf8;   /* Lighter aqua */
  --accent-dark: #0891b2;    /* Darker aqua */
  --border: rgba(255, 255, 255, 0.08);
  --shadow: rgba(0, 212, 255, 0.15);
}

/* Base Styles */
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background:
    radial-gradient(circle at top right, rgba(0, 212, 255, 0.08), transparent 40%),
    linear-gradient(180deg, var(--bg-dark), #030712);
  color: var(--text-main);
  line-height: 1.7;
  min-height: 100vh;
}

/* Header */
header {
  background: linear-gradient(135deg, #000814, #001d3d);
  padding: 4rem 1.5rem 3rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 6px 24px var(--shadow);
}

header h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

header p {
  font-size: 1.2rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* Navigation */
nav {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  padding: 1rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav a {
  display: inline-block;
  color: var(--text-main);
  text-decoration: none;
  margin: 0 1rem;
  padding: 0.65rem 1.25rem;
  font-weight: 600;
  border-radius: 999px;
  transition: all 0.3s ease;
}

nav a:hover {
  background: var(--accent);
  color: #001018;
  box-shadow: 0 0 18px rgba(0, 212, 255, 0.35);
}

/* Main Content */
main {
  max-width: 1000px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}

main h2 {
  font-size: 2.25rem;
  margin-bottom: 1.5rem;
  color: var(--accent);
  text-align: center;
}

main p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}

/* Content Card */
section,
form {
  background: rgba(17, 24, 39, 0.88);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

/* Forms */
label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
  color: var(--text-main);
}

input,
textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(203, 213, 225, 0.15);
  border-radius: 12px;
  background: #0f172a;
  color: var(--text-main);
  font-size: 1rem;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

/* Buttons */
button,
.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #001018;
  padding: 0.9rem 1.8rem;
  border: none;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

button:hover,
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 212, 255, 0.3);
}

/* Links */
a {
  color: var(--accent);
}

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

/* Footer */
footer {
  margin-top: 4rem;
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  background: rgba(5, 7, 13, 0.9);
}

/* Responsive Design */
@media (max-width: 768px) {
  header h1 {
    font-size: 2.25rem;
  }

  nav a {
    display: block;
    margin: 0.5rem auto;
    max-width: 220px;
  }

  section,
  form {
    padding: 1.5rem;
  }

  main h2 {
    font-size: 1.8rem;
  }
}