:root {
  --bg-color: #0d1117;
  --bg-gradient: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
  --surface: rgba(33, 38, 45, 0.6);
  --surface-hover: rgba(48, 54, 61, 0.8);
  --border: rgba(240, 246, 252, 0.1);
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-glow: rgba(88, 166, 255, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.nav {
  display: flex;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  margin-left: auto;
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.main-content {
  flex: 1;
  padding: 3rem 2rem;
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: #ffffff;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 2.5rem;
}

/* Grid Layout for the Menu */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  background: var(--surface-hover);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3), 0 0 16px var(--accent-glow);
  border-color: rgba(240, 246, 252, 0.2);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: inline-block;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.5rem;
}

.card-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Forms and Textareas */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.75rem;
  color: #fff;
}

.form-control {
  width: 100%;
  padding: 1rem;
  background: rgba(13, 17, 23, 0.7);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.2s ease;
  resize: vertical;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #408bea;
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* Modal Pop-up */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  width: 90%;
  max-width: 450px;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5), 0 0 24px var(--accent-glow);
  transform: translateY(20px);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
  text-align: center;
}

.modal-desc {
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.modal-body {
  margin-top: 1.5rem;
}