/* ===================== VARIABLES ===================== */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(255,255,255,0.03);
  --border: rgba(255,255,255,0.06);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --accent: #22d3ee;
  --accent-glow: rgba(34,211,238,0.15);
  --accent-alt: #a78bfa;
  --gradient: linear-gradient(135deg, #22d3ee, #a78bfa);
}

/* ===================== RESET & BASE ===================== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Outfit', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===================== NAVIGATION ===================== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 1rem 2rem;
  display: flex; justify-content: space-between; align-items: center;
  backdrop-filter: blur(20px);
  background: rgba(10,14,26,0.8);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}
nav.scrolled { padding: 0.6rem 2rem; background: rgba(10,14,26,0.95); }
.logo {
  font-family: 'Space Mono', monospace;
  font-size: 1.1rem; color: var(--accent);
  text-decoration: none; letter-spacing: -0.5px;
}
.nav-links { display: flex; gap: 0.3rem; list-style: none; }
.nav-links a {
  color: var(--text-secondary); text-decoration: none;
  font-size: 0.85rem; padding: 0.5rem 1rem;
  border-radius: 8px; transition: all 0.3s ease;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--accent); background: var(--accent-glow);
}
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 5px; }
.hamburger span { width: 24px; height: 2px; background: var(--text-secondary); transition: all 0.3s ease; }

/* ===================== PAGE CONTENT ===================== */
.page-content {
  min-height: 100vh;
  padding-top: 80px;
  animation: fadeIn 0.5s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===================== HERO ===================== */
.hero {
  min-height: calc(100vh - 80px);
  display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 2rem; position: relative;
}
.hero::before {
  content: ''; position: absolute; top: 20%; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}
.hero-content { position: relative; z-index: 1; }
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700; letter-spacing: -2px;
  margin-bottom: 0.5rem; background: var(--gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  animation: slideUp 0.8s ease;
}
.hero .role { font-size: clamp(1rem, 2vw, 1.3rem); color: var(--text-secondary); font-weight: 300; margin-bottom: 0.5rem; animation: slideUp 0.8s ease 0.1s both; }
.hero .tagline { font-family: 'Space Mono', monospace; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2.5rem; letter-spacing: 1px; animation: slideUp 0.8s ease 0.2s both; }
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; animation: slideUp 0.8s ease 0.3s both; }
@keyframes slideUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

/* ===================== SCROLL INDICATOR ===================== */
.scroll-indicator {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  animation: bounce 2s infinite; color: var(--text-muted); font-size: 0.75rem; text-align: center;
}
.scroll-indicator a { color: var(--text-muted); text-decoration: none; }
.scroll-indicator div { width: 20px; height: 30px; border: 2px solid var(--text-muted); border-radius: 10px; margin: 0.5rem auto 0; position: relative; }
.scroll-indicator div::after { content: ''; width: 3px; height: 8px; background: var(--accent); border-radius: 2px; position: absolute; top: 5px; left: 50%; transform: translateX(-50%); animation: scrollDot 2s infinite; }
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(-8px); } }
@keyframes scrollDot { 0% { opacity: 1; top: 5px; } 100% { opacity: 0; top: 18px; } }

/* ===================== BUTTONS ===================== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 12px 28px; border-radius: 10px; text-decoration: none;
  font-size: 0.9rem; font-weight: 600; transition: all 0.3s ease; cursor: pointer; border: none;
}
.btn-primary { background: var(--gradient); color: var(--bg-primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px var(--accent-glow); }
.btn-outline { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

/* ===================== SECTIONS ===================== */
.section { max-width: 900px; margin: 0 auto; padding: 4rem 2rem; }
.section-title { font-family: 'Space Mono', monospace; font-size: 0.75rem; color: var(--accent); text-transform: uppercase; letter-spacing: 3px; margin-bottom: 0.5rem; }
.section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 2rem; letter-spacing: -1px; }

/* ===================== CARDS ===================== */
.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
  padding: 1.8rem; margin-bottom: 1rem; transition: all 0.3s ease; position: relative; overflow: hidden;
}
.card::before { content: ''; position: absolute; top: 0; left: 0; width: 3px; height: 100%; background: var(--gradient); opacity: 0; transition: opacity 0.3s ease; }
.card:hover { border-color: rgba(34,211,238,0.2); transform: translateX(4px); }
.card:hover::before { opacity: 1; }
.card h3 { font-size: 1.1rem; margin-bottom: 0.2rem; }
.card .meta { font-family: 'Space Mono', monospace; font-size: 0.75rem; color: var(--accent); margin-bottom: 0.8rem; }
.card p { color: var(--text-secondary); font-size: 0.95rem; }

/* ===================== LAB GRID ===================== */
.lab-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.lab-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
  padding: 1.5rem; transition: all 0.4s ease;
}
.lab-card:hover { border-color: rgba(34,211,238,0.3); transform: translateY(-4px); box-shadow: 0 20px 40px rgba(0,0,0,0.3); }
.lab-card .icon { font-size: 1.8rem; margin-bottom: 0.8rem; display: block; }
.lab-card h3 { font-size: 1rem; margin-bottom: 0.3rem; }
.lab-card p { font-size: 0.85rem; color: var(--text-secondary); }
.lab-card .status { display: inline-block; font-family: 'Space Mono', monospace; font-size: 0.65rem; padding: 3px 8px; border-radius: 4px; margin-top: 0.8rem; text-transform: uppercase; letter-spacing: 1px; }
.status-live { background: rgba(34,197,94,0.15); color: #22c55e; }
.status-planned { background: rgba(250,204,21,0.15); color: #facc15; }

/* ===================== SKILLS ===================== */
.skills-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.skill-group h3 { font-family: 'Space Mono', monospace; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 2px; color: var(--accent); margin-bottom: 0.8rem; }
.skill-tag {
  display: inline-block; background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-secondary); padding: 6px 14px; border-radius: 8px;
  font-size: 0.82rem; margin: 3px; transition: all 0.3s ease;
}
.skill-tag:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); transform: scale(1.05); }

/* ===================== CONTACT ===================== */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; }
.contact-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
  padding: 2rem; text-align: center; transition: all 0.3s ease; text-decoration: none; display: block;
}
.contact-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.contact-card .icon { font-size: 2rem; margin-bottom: 0.8rem; display: block; }
.contact-card h3 { color: var(--text-primary); font-size: 1rem; margin-bottom: 0.3rem; }
.contact-card p { color: var(--text-secondary); font-size: 0.85rem; }

/* ===================== PLAYGROUND ===================== */
#liveClock { font-family: 'Space Mono', monospace; font-size: 2.5rem; text-align: center; padding: 2rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; color: var(--accent); margin-top: 1rem; }
.counter-demo { display: flex; align-items: center; justify-content: center; gap: 1.5rem; padding: 2rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; margin-top: 1rem; }
.counter-demo button { width: 50px; height: 50px; border-radius: 12px; border: 1px solid var(--border); background: var(--bg-secondary); color: var(--accent); font-size: 1.5rem; cursor: pointer; transition: all 0.2s ease; font-family: 'Space Mono', monospace; }
.counter-demo button:hover { background: var(--accent-glow); border-color: var(--accent); }
#counterValue { font-family: 'Space Mono', monospace; font-size: 3rem; min-width: 80px; text-align: center; }
#colorDemo { width: 100%; height: 120px; border-radius: 12px; background: var(--gradient); display: flex; align-items: center; justify-content: center; font-family: 'Space Mono', monospace; font-size: 0.9rem; cursor: pointer; transition: all 0.5s ease; margin-top: 1rem; color: var(--bg-primary); font-weight: 700; }
#notepad { width: 100%; height: 150px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; color: var(--text-primary); padding: 1rem; font-family: 'Space Mono', monospace; font-size: 0.85rem; resize: vertical; margin-top: 1rem; outline: none; }

/* ===================== FOOTER ===================== */
footer { text-align: center; padding: 3rem 2rem; color: var(--text-muted); font-size: 0.8rem; border-top: 1px solid var(--border); font-family: 'Space Mono', monospace; }
footer span { color: var(--accent); }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(10,14,26,0.98); flex-direction: column; padding: 1rem; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .hero h1 { font-size: 2.2rem; }
  .section { padding: 2.5rem 1.2rem; }
}

/* ===================== SCROLLBAR ===================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }