/* Demetrion-Dev - Clean Professional Site */

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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-elevated: #1a1a25;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --border-color: rgba(255, 255, 255, 0.1);
  --accent-primary: #00d4ff;
  --accent-secondary: #7c3aed;
  --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-elevated: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: rgba(0, 0, 0, 0.1);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 1rem;
}

h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--accent-gradient);
  margin-top: 0.5rem;
  border-radius: 2px;
}

.text-center h2::after {
  margin-left: auto;
  margin-right: auto;
}

h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

h4 { font-size: 1.125rem; }

p { margin-bottom: 1rem; }

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--text-primary);
}

strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.text-center { text-align: center; }

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

[data-theme="light"] header {
  background: rgba(248, 250, 252, 0.95);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo:hover {
  color: var(--text-primary);
}

/* Desktop Navigation */
nav ul {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
}

nav li {
  margin: 0;
  padding: 0;
}

nav a {
  display: block;
  padding: 0.5rem 0.875rem;
  color: var(--text-secondary);
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

nav a:hover,
nav a.active {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-primary);
  z-index: 200;
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
  display: block;
}

.menu-toggle .close-icon { display: none; }
.menu-toggle.active .menu-icon { display: none; }
.menu-toggle.active .close-icon { display: block; }

/* ==========================================
   THEME TOGGLE
   ========================================== */

.theme-toggle {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-elevated);
  color: var(--text-primary);
  cursor: pointer;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.theme-toggle:hover {
  transform: scale(1.1);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.theme-toggle .sun { display: block; }
.theme-toggle .moon { display: none; }
[data-theme="light"] .theme-toggle .sun { display: none; }
[data-theme="light"] .theme-toggle .moon { display: block; }

/* ==========================================
   SECTIONS
   ========================================== */

section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

/* Hero */
.hero {
  padding: 6rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

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

.hero p {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 1.5rem auto;
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #0a0a0f;
  box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
  color: #0a0a0f;
  box-shadow: 0 6px 25px rgba(0, 212, 255, 0.4);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border: 2px solid var(--accent-primary);
}

.btn-outline:hover {
  background: var(--accent-primary);
  color: #0a0a0f;
}

/* ==========================================
   CONTENT LISTS (not nav)
   ========================================== */

main ul,
.card ul {
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
}

main ul li,
.card ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.625rem;
  line-height: 1.6;
}

main ul li::before,
.card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 6px;
  height: 6px;
  background: var(--accent-primary);
  border-radius: 50%;
}

/* ==========================================
   CARDS & GRID
   ========================================== */

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.card:hover {
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
  transform: translateY(-4px);
}

.card h3 {
  margin-top: 0;
}

/* ==========================================
   FOOTER
   ========================================== */

footer {
  margin-top: auto;
  padding: 1.5rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ==========================================
   CONTACT FORM
   ========================================== */

.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

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

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* ==========================================
   RESPONSIVE - MOBILE
   ========================================== */

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
    position: relative;
    z-index: 200;
  }

  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #0a0a0f;
    z-index: 150;
    padding: 5rem 0 2rem;
    transition: right 0.3s ease;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
  }

  [data-theme="light"] nav {
    background: #ffffff;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
    border-left: 1px solid rgba(0, 0, 0, 0.1);
  }

  nav.active {
    right: 0;
  }

  /* Overlay behind menu */
  nav::before {
    content: '';
    position: fixed;
    top: 0;
    left: -100vw;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
  }

  nav.active::before {
    opacity: 1;
    pointer-events: auto;
  }

  nav ul {
    flex-direction: column;
    gap: 0;
    padding: 0 1.5rem;
  }

  nav li {
    border-bottom: 1px solid var(--border-color);
  }

  nav li:last-child {
    border-bottom: none;
  }

  nav a {
    display: block;
    padding: 1rem 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    border-radius: 0;
    color: var(--text-primary);
  }

  nav a:hover,
  nav a.active {
    background: transparent;
    color: var(--accent-primary);
  }

  section {
    padding: 3rem 0;
  }

  .hero {
    padding: 4rem 0;
  }

  .hero p {
    font-size: 1.1rem;
  }

  .btn-group {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
    text-align: center;
  }

  h2::after {
    width: 50px;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ==========================================
   UTILITIES
   ========================================== */

.mb-2 { margin-bottom: 2rem; }
.mt-2 { margin-top: 2rem; }
.highlight { color: var(--accent-primary); }

::selection {
  background: var(--accent-primary);
  color: #0a0a0f;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}