/* ============================================================
   Portfolio Site — Custom Styles
   Built on top of Tailwind CSS (CDN play)
   Dark navy + electric blue palette
   ============================================================ */

/* ── CSS Custom Properties ─────────────────────────────────── */
:root {
  --bg-base:      #07091a;
  --bg-card:      #0d1424;
  --bg-card-hover:#111d35;
  --border:       rgba(59, 130, 246, 0.15);
  --border-hover: rgba(59, 130, 246, 0.45);
  --accent:       #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow:  rgba(59, 130, 246, 0.35);
  --text-primary: #f1f5f9;
  --text-secondary:#94a3b8;
  --text-muted:   #475569;
}

/* ── Base ──────────────────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: #1e3a5f; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── Hero Section ──────────────────────────────────────────── */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 80% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
              var(--bg-base);
}

/* Dot grid overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(59, 130, 246, 0.12) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 30%, transparent 100%);
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 30%, transparent 100%);
  pointer-events: none;
}

/* Floating orbs */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.4), transparent 70%);
  top: -150px; left: -100px;
  animation: float-1 18s ease-in-out infinite;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent 70%);
  bottom: -100px; right: -80px;
  animation: float-2 22s ease-in-out infinite;
}
.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.2), transparent 70%);
  top: 40%; left: 60%;
  animation: float-3 26s ease-in-out infinite;
}

@keyframes float-1 {
  0%,100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(60px, 40px) scale(1.05); }
  66%      { transform: translate(-30px, 80px) scale(0.95); }
}
@keyframes float-2 {
  0%,100% { transform: translate(0, 0) scale(1); }
  50%     { transform: translate(-80px, -60px) scale(1.1); }
}
@keyframes float-3 {
  0%,100% { transform: translate(-50%, -50%) scale(1); }
  50%     { transform: translate(-50%, -60%) scale(1.2); }
}

/* ── Typography ────────────────────────────────────────────── */
.text-gradient {
  background: linear-gradient(135deg, var(--accent-light), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-primary:hover {
  background: #2563eb;
  box-shadow: 0 0 32px rgba(59, 130, 246, 0.6);
  transform: translateY(-2px);
  color: #fff;
  text-decoration: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-hover);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-secondary:hover {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--accent);
  transform: translateY(-2px);
  color: var(--text-primary);
  text-decoration: none;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  background: transparent;
  color: var(--accent-light);
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: 0.375rem;
  border: 1px solid rgba(96, 165, 250, 0.3);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-outline:hover {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--accent-light);
  color: var(--accent-light);
  text-decoration: none;
}

/* ── Navigation ────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(7, 9, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.25rem 0;
  transition: color 0.2s;
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.2s;
}
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-link.active::after,
.nav-link:hover::after { transform: scaleX(1); }

.nav-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.5px;
}
.nav-logo:hover { text-decoration: none; color: #fff; }
.nav-logo .dot { color: var(--accent); }

/* Hamburger button */
.hamburger {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Mobile menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem;
  border-top: 1px solid var(--border);
  background: rgba(7, 9, 26, 0.97);
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-link { padding: 0.6rem 0.5rem; font-size: 1rem; }

/* ── Project Cards ─────────────────────────────────────────── */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.875rem;
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(59, 130, 246, 0.12);
}

.project-card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.project-card-desc {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Tags & Badges ─────────────────────────────────────────── */
.tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent-light);
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 9999px;
  border: 1px solid rgba(59, 130, 246, 0.22);
  white-space: nowrap;
}

.tech-pill {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 500;
  border-radius: 0.25rem;
  border: 1px solid rgba(71, 85, 105, 0.4);
  white-space: nowrap;
}

.featured-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(234, 88, 12, 0.1));
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 9999px;
  font-size: 0.65rem;
  font-weight: 700;
  color: #fbbf24;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ── Filter Buttons ────────────────────────────────────────── */
.filter-btn {
  padding: 0.45rem 1.1rem;
  border-radius: 9999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.filter-btn:hover,
.filter-btn.active {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--accent);
  color: var(--accent-light);
}

/* ── Section Headings ──────────────────────────────────────── */
.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 0.5rem;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}
.section-divider {
  width: 3rem;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 9999px;
  margin-top: 0.875rem;
}

/* ── Skills Grid ───────────────────────────────────────────── */
.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.25rem;
  transition: border-color 0.2s;
}
.skill-category:hover { border-color: var(--border-hover); }

.skill-item {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.18);
  border-radius: 0.375rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0.2rem;
  transition: all 0.2s;
}
.skill-item:hover {
  background: rgba(59, 130, 246, 0.18);
  color: var(--accent-light);
  border-color: rgba(59, 130, 246, 0.4);
}

/* ── Timeline ──────────────────────────────────────────────── */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0.5rem; top: 0.5rem; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline-item { position: relative; padding-bottom: 2rem; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.625rem; top: 0.4rem;
  width: 10px; height: 10px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-glow);
}
.timeline-year { font-size: 0.75rem; font-weight: 700; color: var(--accent-light); letter-spacing: 0.05em; text-transform: uppercase; }
.timeline-role { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-top: 0.15rem; }
.timeline-company { font-size: 0.85rem; color: var(--text-secondary); }
.timeline-desc { font-size: 0.83rem; color: var(--text-muted); margin-top: 0.5rem; line-height: 1.6; }

/* ── Image placeholder ─────────────────────────────────────── */
.img-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #0d1b3e 0%, #162040 50%, #0d1b3e 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.img-placeholder i { font-size: 2rem; opacity: 0.4; }

/* ── Stat Item ─────────────────────────────────────────────── */
.stat-num { font-size: 1.75rem; font-weight: 800; color: var(--accent-light); }
.stat-label { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; }

/* ── Demo Card ─────────────────────────────────────────────── */
.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.875rem;
  overflow: hidden;
  transition: all 0.3s ease;
}
.demo-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(59, 130, 246, 0.1);
}

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  background: linear-gradient(to top, rgba(59, 130, 246, 0.03), transparent);
  border-top: 1px solid var(--border);
}

/* ── Admin Panel ───────────────────────────────────────────── */
.admin-sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  min-height: 100vh;
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
}

.admin-nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border-left: 3px solid transparent;
  text-decoration: none;
  border-top: none; border-right: none; border-bottom: none;
  background: none;
  width: 100%;
  text-align: left;
}
.admin-nav-item:hover { background: rgba(59, 130, 246, 0.08); color: var(--text-primary); }
.admin-nav-item.active { background: rgba(59, 130, 246, 0.12); border-left-color: var(--accent); color: var(--accent-light); }

.admin-input {
  width: 100%;
  padding: 0.6rem 0.875rem;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: inherit;
  transition: border-color 0.2s;
  outline: none;
}
.admin-input:focus { border-color: var(--accent); }
.admin-input::placeholder { color: var(--text-muted); }

.admin-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.admin-project-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  margin-bottom: 0.5rem;
  cursor: grab;
  transition: all 0.2s;
}
.admin-project-row:hover { border-color: var(--border-hover); background: rgba(15, 23, 42, 0.9); }
.admin-project-row.sortable-ghost { opacity: 0.3; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(6px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-box {
  background: #0d1424;
  border: 1px solid var(--border-hover);
  border-radius: 1rem;
  width: 100%;
  max-width: 700px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 1.75rem;
  transform: translateY(24px);
  transition: transform 0.25s;
}
.modal-overlay.open .modal-box { transform: translateY(0); }

/* Toggle switch */
.toggle-switch { position: relative; width: 44px; height: 24px; display: inline-block; flex-shrink: 0; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-thumb {
  position: absolute; cursor: pointer; inset: 0;
  background: #1e293b; border-radius: 12px;
  border: 1px solid var(--border); transition: all 0.2s;
}
.toggle-thumb::before {
  content: ''; position: absolute;
  height: 18px; width: 18px; left: 2px; bottom: 2px;
  background: var(--text-muted); border-radius: 50%; transition: all 0.2s;
}
.toggle-switch input:checked + .toggle-thumb { background: rgba(59,130,246,0.3); border-color: var(--accent); }
.toggle-switch input:checked + .toggle-thumb::before { transform: translateX(20px); background: var(--accent); }

/* Toast notification */
.toast {
  position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 300;
  background: #0d1424; border: 1px solid var(--accent);
  border-radius: 0.5rem; padding: 0.75rem 1.25rem;
  color: var(--text-primary); font-size: 0.85rem;
  box-shadow: 0 4px 20px rgba(59,130,246,0.3);
  display: flex; align-items: center; gap: 0.5rem;
  transform: translateY(80px); opacity: 0;
  transition: all 0.3s; pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; pointer-events: all; }
.toast.success { border-color: #22c55e; box-shadow: 0 4px 20px rgba(34,197,94,0.3); }
.toast.error { border-color: #ef4444; box-shadow: 0 4px 20px rgba(239,68,68,0.3); }

/* ── Scroll reveal (simple fallback if AOS CDN unavailable) ── */
[data-aos] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .admin-sidebar { display: none !important; }
  .orb-1 { width: 250px; height: 250px; }
  .orb-2 { width: 200px; height: 200px; }
  .orb-3 { display: none; }
}