/* css/custom.css - Dynamic interactions and animations */

/* --- Scroll Animations --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for multiple items appearing at once */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }

/* --- Dark Mode Variables & Transitions --- */
html {
  transition: background-color 0.4s ease, color 0.4s ease;
}

html.dark-mode {
  --paper: #0b0c10;
  --paper-2: #1f2833;
  --ink-950: #fbfbfb;
  --ink-900: #e2e8f0;
  --ink-800: #cbd5e1;
  --ink-700: #94a3b8;
  --ink-500: #64748b;
  --ink-400: #475569;
  --ink-300: #334155;
  --ink-200: #1e293b;
  --ink-100: #0f172a;
  --ink-50:  #020617;
  
  --white: #111827;
}

/* Specific Dark Mode overrides for cards and nav */
html.dark-mode .info-card,
html.dark-mode .stat-row,
html.dark-mode .marquee-strip {
  background: var(--paper-2);
  border-color: var(--ink-200);
}

html.dark-mode .nav {
  background: rgba(11, 12, 16, 0.7);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 32px -8px rgba(0, 0, 0, 0.5);
}

html.dark-mode .btn-outline {
  border-color: var(--ink-300);
  color: var(--ink-800);
}

html.dark-mode .btn-outline:hover {
  background: var(--ink-800);
  color: var(--paper);
}

/* Dark Mode Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  color: var(--ink-700);
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
  margin-right: 12px;
}
.theme-toggle:hover {
  background: rgba(124, 58, 237, 0.1);
  color: var(--violet);
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
}

/* Active Nav State */
.nav-links a.active {
  color: var(--ink-900);
  background: rgba(99,102,241,0.08);
}
.nav-links a.active .num {
  color: var(--indigo);
}

/* =========================================
   Scroll Progress Bar
   ========================================= */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--grad);
  z-index: 9999;
  width: 0%;
  border-radius: 0 2px 2px 0;
  pointer-events: none;
}

/* =========================================
   Back to Top Button
   ========================================= */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--ink-900);
  color: white;
  border: none;
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s, transform 0.3s, background 0.2s, box-shadow 0.2s;
  z-index: 200;
  box-shadow: 0 4px 20px rgba(20, 24, 43, 0.18);
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--indigo-d);
  box-shadow: 0 8px 28px rgba(79, 70, 229, 0.4);
  transform: translateY(-4px);
}

/* =========================================
   Toast Notification
   ========================================= */
.toast {
  position: fixed;
  bottom: 44px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: var(--ink-950);
  color: white;
  padding: 12px 22px 12px 16px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  flex-shrink: 0;
}

/* =========================================
   Typewriter Cursor
   ========================================= */
.tw-cursor {
  display: inline-block;
  width: 2px;
  height: 0.85em;
  background: var(--indigo);
  margin-left: 2px;
  vertical-align: text-bottom;
  border-radius: 1px;
  animation: tw-blink 0.9s step-end infinite;
}
@keyframes tw-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* =========================================
   Bento Card 3D Tilt & Perspective
   ========================================= */
.bento {
  perspective: 1400px;
}
.card {
  transform-style: preserve-3d;
}
.card:hover {
  transform: translateY(-6px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
}

/* =========================================
   Dark Mode Component Fixes
   ========================================= */
html.dark-mode .card {
  background: var(--paper-2);
  border-color: var(--ink-200);
}
html.dark-mode .certs {
  background: var(--paper-2);
  border-color: var(--ink-200);
}
html.dark-mode .cert-list li:hover {
  background: var(--ink-100);
}
html.dark-mode .pill {
  background: var(--ink-100);
  border-color: var(--ink-200);
  color: var(--ink-800);
}
html.dark-mode .pill.featured {
  background: var(--indigo-d);
  color: white;
  border-color: transparent;
}
html.dark-mode .chip {
  background: var(--ink-100);
  color: var(--ink-700);
}
html.dark-mode .chip.accent {
  background: var(--indigo-d);
  color: white;
}
html.dark-mode .back-to-top {
  background: var(--paper-2);
  color: var(--ink-900);
  border: 1px solid var(--ink-200);
}
html.dark-mode .back-to-top:hover {
  background: var(--indigo-d);
  color: white;
  border-color: transparent;
}
html.dark-mode .toast {
  background: var(--paper-2);
  border: 1px solid var(--ink-200);
  color: var(--ink-900);
}

/* =========================================
   Portrait Stage — photo + blob + floating chips
   ========================================= */
.portrait-stage {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1.18;
  isolation: isolate;
  margin: 0 auto 8px;
}

/* Ambient glow behind the blob */
.halo {
  position: absolute;
  left: 50%; bottom: -6%;
  width: 110%; aspect-ratio: 1;
  transform: translateX(-50%);
  background: radial-gradient(circle at 50% 60%, rgba(139,92,246,0.28), rgba(99,102,241,0.18) 35%, transparent 65%);
  filter: blur(36px);
  z-index: 0;
  animation: halo-pulse 6s ease-in-out infinite;
}
@keyframes halo-pulse {
  0%, 100% { opacity: 0.85; transform: translateX(-50%) scale(1); }
  50%       { opacity: 1;    transform: translateX(-50%) scale(1.04); }
}

/* Purple arch blob */
.portrait-backdrop {
  position: absolute;
  left: 50%; bottom: 0;
  transform: translateX(-50%);
  width: 88%;
  aspect-ratio: 1 / 1.05;
  border-radius: 44% 44% 36% 36% / 44% 44% 18% 18%;
  background:
    radial-gradient(ellipse at 30% 25%, rgba(255,255,255,0.5), transparent 55%),
    linear-gradient(160deg, #6366f1 0%, #8b5cf6 55%, #a855f7 100%);
  box-shadow:
    0 40px 80px -30px rgba(99,102,241,0.55),
    0 20px 40px -20px rgba(139,92,246,0.45);
  z-index: 1;
  overflow: hidden;
}
.portrait-backdrop::after {
  content: ""; position: absolute;
  left: 50%; top: 18%;
  width: 70%; aspect-ratio: 1;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(255,255,255,0.32), transparent 60%);
  filter: blur(8px);
}

/* Portrait photo — works with transparent-bg PNG */
.portrait {
  position: absolute;
  left: 50%; bottom: 0;
  transform: translateX(-50%);
  width: 96%;
  z-index: 2;
  border-radius: 0;
  filter:
    drop-shadow(0 24px 32px rgba(20,24,43,0.28))
    drop-shadow(0 6px 12px rgba(99,102,241,0.3));
  /* Fade feet into backdrop for natural emergence */
  -webkit-mask-image: linear-gradient(180deg, black 72%, transparent 100%);
          mask-image: linear-gradient(180deg, black 72%, transparent 100%);
  animation: portrait-float 8s ease-in-out infinite;
}
/* In dark mode, slightly boost the indigo glow so face pops on dark bg */
html.dark-mode .portrait {
  filter:
    drop-shadow(0 24px 32px rgba(0,0,0,0.5))
    drop-shadow(0 6px 16px rgba(139,92,246,0.45))
    brightness(1.04);
}
@keyframes portrait-float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(-6px); }
}

/* Badge tags (left overlay) */
.grid-deco {
  position: absolute;
  left: -4%; bottom: 30%;
  z-index: 4;
  display: flex; flex-direction: column; gap: 10px;
  pointer-events: none;
}
.badge-tag {
  background: white;
  border: 1px solid var(--ink-100);
  border-radius: 10px;
  padding: 9px 13px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink-700);
  display: inline-flex; align-items: center; gap: 8px;
  box-shadow: 0 8px 20px -6px rgba(20,24,43,0.12);
  white-space: nowrap;
}
.badge-tag .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34,197,94,0.2);
  flex-shrink: 0;
}
.badge-tag.purple .dot {
  background: var(--violet);
  box-shadow: 0 0 0 3px rgba(139,92,246,0.2);
}

/* Floating tech chip cards */
.die {
  position: absolute;
  left: var(--x); top: var(--y);
  width: 88px; height: 88px;
  border-radius: 22px;
  background: linear-gradient(155deg, #ffffff 0%, #f6f7fb 60%, #eef1f8 100%);
  border: 1px solid rgba(255,255,255,0.9);
  box-shadow:
    0 1px 0 rgba(255,255,255,1) inset,
    0 -3px 0 rgba(20,24,43,0.05) inset,
    0 2px 4px rgba(20,24,43,0.04),
    0 12px 24px -6px rgba(20,24,43,0.16),
    0 28px 48px -14px rgba(99,102,241,0.28);
  display: grid; place-items: center;
  transform: translate(-50%, -50%) rotate(var(--rot));
  z-index: 5;
  animation: die-float var(--dur) ease-in-out infinite;
  animation-delay: var(--delay);
  transition: transform .3s cubic-bezier(.2,.7,.2,1), box-shadow .3s;
}
/* Glossy highlight */
.die::before {
  content: ""; position: absolute;
  top: 4px; left: 4px; right: 4px; height: 45%;
  border-radius: 18px 18px 30px 30px / 18px 18px 100% 100%;
  background: linear-gradient(180deg, rgba(255,255,255,0.85) 0%, rgba(255,255,255,0) 100%);
  pointer-events: none;
}
.die:hover {
  transform: translate(-50%, -50%) rotate(0deg) scale(1.1);
  box-shadow:
    0 1px 0 rgba(255,255,255,1) inset,
    0 -3px 0 rgba(20,24,43,0.05) inset,
    0 2px 4px rgba(20,24,43,0.04),
    0 20px 36px -6px rgba(20,24,43,0.22),
    0 40px 60px -14px rgba(99,102,241,0.4);
}
.die img { position: relative; z-index: 1; object-fit: contain; }

@keyframes die-float {
  0%, 100% { transform: translate(-50%, -50%) rotate(var(--rot)) translateY(0); }
  50%       { transform: translate(-50%, -50%) rotate(calc(var(--rot) + 3deg)) translateY(-12px); }
}

/* Per-die size variation */
.die-1 { width: 96px; height: 96px; }
.die-2 { width: 80px; height: 80px; }
.die-3 { width: 80px; height: 80px; }
.die-4 { width: 84px; height: 84px; }
.die-5 { width: 82px; height: 82px; }
.die-6 { width: 74px; height: 74px; }
.die-7 { width: 72px; height: 72px; }

/* Dark mode */
html.dark-mode .portrait-backdrop {
  box-shadow:
    0 40px 80px -30px rgba(99,102,241,0.4),
    0 20px 40px -20px rgba(139,92,246,0.3);
}
html.dark-mode .die {
  background: linear-gradient(155deg, #1e293b 0%, #0f172a 100%);
  border-color: rgba(255,255,255,0.12);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.08) inset,
    0 12px 24px -6px rgba(0,0,0,0.4),
    0 28px 48px -14px rgba(99,102,241,0.2);
}
html.dark-mode .badge-tag {
  background: var(--paper-2);
  border-color: var(--ink-200);
  color: var(--ink-700);
}