/* ============================================
   ArCh Boot — Embedded Systems Hero Page
   ============================================ */

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

:root {
  --bg: #0a0a0a;
  --bg-chip: #111;
  --bg-chip-body: #1a1a1a;
  --trace: #2ecc71;
  --trace-dim: #1a5c34;
  --trace-glow: rgba(46, 204, 113, 0.35);
  --amber: #d4a017;
  --amber-dim: #6b5010;
  --amber-glow: rgba(212, 160, 23, 0.3);
  --text: #c8c8c8;
  --text-dim: #555;
  --text-bright: #e8e8e8;
  --boot-green: #33ff66;
  --boot-green-dim: #0a3318;
  --pin: #888;
  --pin-bright: #bbb;
  --peripheral-bg: rgba(20, 20, 20, 0.85);
  --peripheral-border: #2a2a2a;
  --font-mono: 'Share Tech Mono', 'Courier New', monospace;
  --font-heading: 'Chakra Petch', sans-serif;
  --font-body: 'Manrope', sans-serif;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

.boot-screen {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: #000;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 32px 40px;
  overflow-y: auto;
  overflow-x: hidden;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
.boot-screen::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 60%, rgba(0, 0, 0, 0.5) 100%);
  pointer-events: none;
  z-index: 1;
}
.boot-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.boot-terminal {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.1vw, 13px);
  line-height: 1.65;
  color: var(--boot-green);
  text-shadow: 0 0 6px rgba(51, 255, 102, 0.25);
  width: 100%;
  position: relative;
  z-index: 2;
}
.boot-terminal pre {
  white-space: pre;
  overflow-x: hidden;
  margin: 0;
}
.boot-cursor {
  display: inline-block;
  animation: blink-cursor 0.6s step-end infinite;
  text-shadow: 0 0 8px rgba(51, 255, 102, 0.5);
}
@keyframes blink-cursor {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}
.main-content {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 1s ease 0.2s;
  overflow: hidden;
}
.main-content.visible { opacity: 1; }
.main-content::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(46, 204, 113, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(46, 204, 113, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.trace-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}
.trace-line {
  stroke: var(--trace-dim);
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: url(#trace-glow);
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  transition: stroke 0.6s ease;
}
.trace-line.powered {
  stroke: var(--trace);
  stroke-dashoffset: 0;
}
.mcu-container {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.mcu-chip {
  position: relative;
  width: clamp(180px, 22vw, 260px);
  height: clamp(180px, 22vw, 260px);
  filter: grayscale(1) brightness(0.5);
  transition: filter 1.2s ease, transform 0.3s ease;
}
.mcu-chip.powered { filter: grayscale(0) brightness(1); }
.mcu-chip:hover { transform: scale(1.02); }
.mcu-body {
  position: absolute;
  inset: 18px;
  background: var(--bg-chip-body);
  border: 1px solid #333;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.5), 0 0 30px rgba(46, 204, 113, 0);
  transition: box-shadow 1.2s ease;
}
.mcu-chip.powered .mcu-body {
  box-shadow: inset 0 0 20px rgba(0,0,0,0.5), 0 0 40px var(--trace-glow);
}
.mcu-dot {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #333;
  border: 1px solid #444;
}
.mcu-chip.powered .mcu-dot {
  background: var(--trace);
  box-shadow: 0 0 8px var(--trace-glow);
}
.mcu-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-align: center;
}
.mcu-brand {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 4px;
  transition: color 1.2s ease;
}
.mcu-chip.powered .mcu-brand { color: var(--text-bright); }
.mcu-part {
  font-family: var(--font-mono);
  font-size: clamp(9px, 1vw, 12px);
  color: var(--text-dim);
  letter-spacing: 2px;
  transition: color 1.2s ease;
}
.mcu-chip.powered .mcu-part { color: #888; }
.mcu-desc {
  font-family: var(--font-mono);
  font-size: clamp(7px, 0.8vw, 10px);
  color: var(--text-dim);
  letter-spacing: 1px;
  margin-top: 4px;
  transition: color 1.2s ease;
}
.mcu-chip.powered .mcu-desc { color: #666; }
.mcu-pins {
  position: absolute;
  display: flex;
  gap: 6px;
}
.mcu-pins-top,
.mcu-pins-bottom {
  left: 28px;
  right: 28px;
  height: 14px;
  flex-direction: row;
  justify-content: center;
}
.mcu-pins-top { top: 4px; }
.mcu-pins-bottom { bottom: 4px; }
.mcu-pins-left,
.mcu-pins-right {
  top: 28px;
  bottom: 28px;
  width: 14px;
  flex-direction: column;
  justify-content: center;
}
.mcu-pins-left { left: 4px; }
.mcu-pins-right { right: 4px; }
.mcu-pins-top,
.mcu-pins-bottom {
  background: repeating-linear-gradient(90deg, transparent 0px, transparent 4px, var(--pin) 4px, var(--pin) 10px, transparent 10px, transparent 16px);
}
.mcu-pins-left,
.mcu-pins-right {
  background: repeating-linear-gradient(180deg, transparent 0px, transparent 4px, var(--pin) 4px, var(--pin) 10px, transparent 10px, transparent 16px);
}
.mcu-chip.powered .mcu-pins-top,
.mcu-chip.powered .mcu-pins-bottom {
  background: repeating-linear-gradient(90deg, transparent 0px, transparent 4px, var(--pin-bright) 4px, var(--pin-bright) 10px, transparent 10px, transparent 16px);
}
.mcu-chip.powered .mcu-pins-left,
.mcu-chip.powered .mcu-pins-right {
  background: repeating-linear-gradient(180deg, transparent 0px, transparent 4px, var(--pin-bright) 4px, var(--pin-bright) 10px, transparent 10px, transparent 16px);
}
.peripherals {
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}
.peripheral {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 20px;
  background: var(--peripheral-bg);
  border: 1px solid var(--peripheral-border);
  border-radius: 6px;
  text-decoration: none;
  color: var(--text);
  pointer-events: auto;
  cursor: pointer;
  filter: grayscale(1) brightness(0.4);
  opacity: 0;
  transform: scale(0.5);
  transition: filter 0.8s ease, opacity 0.5s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), border-color 0.3s ease, box-shadow 0.3s ease;
}
.peripheral.powered {
  filter: grayscale(0) brightness(1);
  opacity: 1;
  transform: scale(1);
}
.peripheral:hover {
  transform: scale(1.05);
  border-color: var(--trace);
  box-shadow: 0 0 20px var(--trace-glow);
}
.peripheral-disabled {
  cursor: default;
}
.peripheral-disabled:hover {
  transform: scale(1);
  border-color: var(--peripheral-border);
  box-shadow: none;
}
.peripheral-icon { width: 28px; height: 28px; color: var(--trace); }
.peripheral-icon svg { width: 100%; height: 100%; }
.peripheral-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text-bright);
}
.peripheral-sub {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 1px;
}
.peripheral-portfolio { top: 14%; left: 50%; translate: -50% 0; }
.peripheral-github { top: 50%; right: 8%; translate: 0 -50%; }
.peripheral-linkedin { bottom: 14%; left: 50%; translate: -50% 0; }
.peripheral-email { top: 50%; left: 8%; translate: 0 -50%; }
.tagline {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  opacity: 0;
  transition: opacity 1s ease;
  text-align: center;
}
.tagline.visible { opacity: 1; }
.tagline-text {
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.2vw, 14px);
  color: var(--text-dim);
  letter-spacing: 1px;
}
.status-register {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 7px 16px;
  background: linear-gradient(180deg, rgba(10, 18, 12, 0.85) 0%, rgba(8, 14, 10, 0.95) 100%);
  border: 1px solid rgba(46, 204, 113, 0.1);
  border-top-color: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), inset 0 -1px 2px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.8s ease, transform 0.6s ease;
}
.status-register::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 0%, transparent 35%, rgba(255, 255, 255, 0.03) 38%, rgba(255, 255, 255, 0.06) 42%, rgba(255, 255, 255, 0.03) 46%, transparent 49%, transparent 100%);
  pointer-events: none;
}
.status-register::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, transparent 0px, transparent 1px, rgba(0, 0, 0, 0.12) 1px, rgba(0, 0, 0, 0.12) 2px);
  pointer-events: none;
}
.status-register.visible { opacity: 1; transform: translateY(0); }
.sr-item {
  font-family: var(--font-mono);
  font-size: 9px;
  color: rgba(46, 204, 113, 0.55);
  letter-spacing: 1.5px;
  padding: 0 8px;
  position: relative;
  z-index: 1;
  text-shadow: 0 0 4px rgba(46, 204, 113, 0.15);
}
.sr-divider { width: 1px; height: 10px; background: rgba(46, 204, 113, 0.1); position: relative; z-index: 1; }
.sr-blink { color: var(--trace); text-shadow: 0 0 6px rgba(46, 204, 113, 0.3); animation: sr-pulse 2s ease-in-out infinite; }
@keyframes sr-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.skip-hint {
  position: fixed;
  bottom: 20px;
  left: 50%;
  translate: -50% 0;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
  z-index: 1001;
}
.skip-hint.visible { opacity: 1; }
.arch-hl { color: var(--trace); text-shadow: 0 0 8px var(--trace-glow); }
@media (max-width: 1024px) {
  .mcu-chip {
    width: clamp(170px, 26vw, 240px);
    height: clamp(170px, 26vw, 240px);
  }

  .peripheral {
    min-width: 120px;
    padding: 12px 14px;
  }

  .tagline {
    width: min(88vw, 720px);
    bottom: 38px;
  }
}

@media (max-width: 768px) {
  .boot-screen { padding: 20px 16px; }
  .boot-terminal {
    font-size: clamp(8px, 1.9vw, 10px);
    line-height: 1.5;
  }

  .main-content {
    justify-content: flex-start;
    padding: 5.5rem 1rem 7.5rem;
  }

  .mcu-container {
    margin-top: 0.25rem;
  }

  .mcu-chip {
    width: clamp(160px, 44vw, 220px);
    height: clamp(160px, 44vw, 220px);
  }

  .mcu-brand {
    letter-spacing: 2px;
  }

  .status-register {
    margin-top: 12px;
    max-width: calc(100vw - 2rem);
    flex-wrap: wrap;
    justify-content: center;
  }

  .peripherals {
    position: relative;
    inset: auto;
    width: 100%;
    max-width: 620px;
    margin-top: 1.25rem;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem;
    pointer-events: auto;
  }

  .peripheral {
    position: static;
    translate: none;
    width: 100%;
    min-height: 92px;
    justify-content: center;
    padding: 12px 14px;
  }

  .peripheral-label { font-size: 9px; }
  .peripheral-sub { font-size: 7px; }
  .peripheral-icon { width: 20px; height: 20px; }
  .sr-item { font-size: 7px; padding: 0 5px; }

  .tagline {
    position: relative;
    left: auto;
    bottom: auto;
    transform: none;
    width: min(92vw, 560px);
    margin-top: 1.2rem;
  }

  .skip-hint {
    bottom: 12px;
    width: calc(100vw - 2rem);
    text-align: center;
    font-size: 9px;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: 4.5rem 0.75rem 6.5rem;
  }

  .peripherals {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    max-width: 360px;
  }

  .peripheral {
    min-height: 84px;
  }

  .status-register {
    padding: 6px 8px;
  }

  .tagline-text {
    font-size: 11px;
    line-height: 1.7;
    display: block;
  }
}