/* -----------------------------------------
   GLOBAL RESET & BASE
----------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'Poppins', sans-serif;
  background: #0a0a0a;
  color: #e0e0e0;
  line-height: 1.6;
  overflow-x: hidden;
}

/* -----------------------------------------
   VARIABLES
----------------------------------------- */
:root {
  --primary:           #7f3fbf;
  --primary-glow:      rgba(127,63,191,0.4);
  --panel-bg:          rgba(255,255,255,0.04);
  --panel-border:      rgba(255,255,255,0.1);
  --text-light:        #f5f5f5;
  --text-muted:        #aaa;
  --radius:            12px;
  --transition:        0.3s ease-in-out;
  --header-duration:   15s;
}

/* -----------------------------------------
   NAVIGATION
----------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  background: rgba(10,10,10,0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--panel-border);
  padding: 0.75rem 1rem;
}
.navbar a {
  margin: 0 1rem;
  text-decoration: none;
  color: var(--text-light);
  font-weight: 600;
  position: relative;
  transition: color var(--transition);
}
.navbar a::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition), left var(--transition);
}
.navbar a:hover {
  color: var(--primary);
}
.navbar a:hover::after {
  width: 100%;
  left: 0;
}

/* -----------------------------------------
   HEADER
----------------------------------------- */
header {
  position: relative;
  height: 320px;
  overflow: hidden;
  border-bottom: 5px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%; height: 200%;
  background: linear-gradient(
    45deg,
    #3b0066, #61008a, #7f3fbf, #61008a, #3b0066
  );
  background-size: 400% 400%;
  animation: hueShift var(--header-duration) infinite;
  z-index: -2;
}
header::after {
  content: '';
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: -1;
}
header h1 {
  color: #fff;
  font-size: 3rem;
  text-shadow: 0 0 10px var(--primary-glow);
  letter-spacing: 1px;
}
@keyframes hueShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* -----------------------------------------
   LAYOUT & PANELS
----------------------------------------- */
.container {
  max-width: 960px;
  margin: 2.5rem auto;
  padding: 0 1rem;
}
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  padding: 1.75rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
  transition: transform var(--transition), box-shadow var(--transition);
}
.panel:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}
.panel h2 {
  color: var(--primary);
  font-size: 1.75rem;
  margin-bottom: 1rem;
  text-shadow: 0 0 6px var(--primary-glow);
}
.panel ul {
  list-style: none;
  margin-left: 1rem;
}
.panel ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.6rem;
}
.panel ul li::before {
  content: '•';
  position: absolute; left: 0;
  color: var(--primary);
  text-shadow: 0 0 4px var(--primary-glow);
}
.panel ul ul li::before {
  color: var(--text-muted);
}
.row {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.col {
  flex: 1;
  min-width: 260px;
}
.col img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  display: block;
  margin-bottom: 1rem;
}

/* -----------------------------------------
   BUTTONS
----------------------------------------- */
.button, .panel a.button {
  display: inline-block;
  padding: 0.7rem 2rem;
  border: none;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  text-transform: uppercase;
  text-decoration: none;
  box-shadow: 0 0 12px var(--primary-glow);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.button:hover, .panel a.button:hover {
  background: #9250d6;
  box-shadow: 0 0 20px var(--primary-glow);
  transform: scale(1.02);
}

/* -----------------------------------------
   FOOTER
----------------------------------------- */
footer {
  text-align: center;
  padding: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* -----------------------------------------
   RESPONSIVE
----------------------------------------- */
@media (max-width: 700px) {
  header h1 { font-size: 2.5rem; }
}
@media (max-width: 500px) {
  header h1 { font-size: 2rem; }
}