/* CSS Custom properties */
:root {
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --transition: 0.2s ease;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;

  /* Font sizes */
  --fs-hero: clamp(40px, 7vw, 80px);
  --fs-display: clamp(32px, 5vw, 48px);
  --fs-section: 28px;
  --fs-subheading: 24px;
  --fs-xl: 20px;
  --fs-intro: clamp(15px, 2vw, 19px);
  --fs-lg: 19px;
  --fs-body: clamp(15px, 1.8vw, 17px);
  --fs-base: 18px;
  --fs-sm: 14px;
  --fs-xs: 13px;
  --fs-tiny: 11px;
}

.page {
  --bg: #f1f5f9;
  --text: #1e293b;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-light: #60a5fa;
  --card: #f8fafc;
  --black: #1e293b;
  --white: #ffffff;
}

.page--dark {
  --bg: #0f172a;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --card: #1a1a1a;
  --black: #0f172a;
  --white: #f1f5f9;
}

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

.page {
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

/* Accessability */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Utility classes */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  z-index: 9999;
  transition: width 0.1s ease;
  will-change: width;
}

/* Fade animations */
.fade-element {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

.fade-element--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Theme toggle */
.theme-toggle {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 10000;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(8px);
  color: var(--white);
  font-size: var(--fs-base);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.theme-toggle:hover {
  background: rgba(59, 130, 246, 0.5);
  border-color: var(--accent-light);
  transform: scale(1.1);
}

.page:not(.page--dark) .theme-toggle {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(37, 99, 235, 0.3);
  color: var(--black);
}

/* Header */
.header {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.header__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background-image: url(assets/header-bg_dark.png);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  z-index: 0;
  transition: background 0.4s ease;
}

/* Gradient overlay on header */
.header__image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.1) 0%,
    rgba(0, 0, 0, 0.15) 50%,
    rgba(0, 0, 0, 0.65) 100%
  );
}

.page:not(.page--dark) .header__image {
  background-image: url(assets/header-bg.png);
  background-position: center;
  background-size: cover;
}

.header__content {
  position: relative;
  z-index: 2;
  margin-top: auto;
  padding: 0 var(--spacing-xl) 120px;
  max-width: 720px;
}

.header__eyebrow {
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: var(--spacing-md);
}

.header__title {
  font-size: var(--fs-hero);
  font-weight: 700;
  line-height: 1.05;
  color: #ffffff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.header__subtitle {
  font-size: var(--fs-intro);
  color: rgba(255, 255, 255, 0.75);
  font-weight: 400;
  line-height: 1.5;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.3);
}

/* Scroll indicator */
.header__scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: fadeInUp 1s ease 1.2s both;
}

.header__scroll-label {
  font-size: var(--fs-tiny);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

.header__scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid rgba(255, 255, 255, 0.5);
  border-bottom: 2px solid rgba(255, 255, 255, 0.5);
  transform: rotate(45deg);
  animation: scrollBounce 1.6s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%,
  100% {
    transform: rotate(45deg) translateY(0);
    opacity: 0.5;
  }
  50% {
    transform: rotate(45deg) translateY(5px);
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* Navigation */
.nav {
  position: relative;
  z-index: 2;
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
}

.nav__link {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}

.nav__link:hover,
.nav__link:focus {
  color: #ffffff;
}

.nav__link:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 4px;
  border-radius: 2px;
}

/* Buttons */
.button {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  border: none;
  border-radius: var(--border-radius-sm);
  background: var(--accent);
  color: var(--white);
  font-size: var(--fs-sm);
  font-weight: 500;
  transition: all var(--transition);
}

.button:hover,
.button:focus {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.button:active {
  transform: translateY(0);
}

/* Main content */
.main {
  padding: var(--spacing-xl);
  max-width: 1400px;
  margin: 0 auto;
  transition:
    background 0.4s,
    color 0.4s,
    box-shadow 0.4s;
}

/* Sections */
/* About */
.about {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: var(--card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}

.about__title,
.projects__title {
  color: var(--accent);
  margin-bottom: var(--spacing-lg);
  font-size: var(--fs-section);
  font-weight: 700;
}

.about__intro {
  font-size: var(--fs-intro);
  color: var(--accent-light);
  font-style: italic;
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
  border-left: 3px solid var(--accent);
  padding-left: var(--spacing-md);
}

.about__text {
  color: var(--muted);
  font-size: var(--fs-body);
  line-height: 1.85;
  margin-bottom: var(--spacing-md);
}

.about__text:last-child {
  margin-bottom: 0;
}

.about__label {
  color: var(--accent);
  font-size: var(--fs-body);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.about__list {
  color: var(--muted);
  font-size: var(--fs-body);
  line-height: 1.85;
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.about__list li {
  margin-bottom: var(--spacing-xs, 6px);
}

/* Contact / Call to action */
.contact {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: var(--card);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--accent);
  box-shadow:
    var(--shadow),
    0 0 32px rgba(59, 130, 246, 0.08);
  text-align: center;
}

.contact__title {
  color: var(--accent);
  margin-bottom: var(--spacing-md);
  font-size: var(--fs-section);
  font-weight: 700;
}

.contact__sub {
  color: var(--muted);
  font-size: var(--fs-body);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto var(--spacing-xl);
}

.contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
  align-items: center;
}

.contact__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--border-radius-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.contact__btn--primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.contact__btn--primary:hover,
.contact__btn--primary:focus {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.contact__btn--outline {
  border: 1.5px solid var(--accent);
  color: var(--accent);
  background: transparent;
}

.contact__btn--outline:hover,
.contact__btn--outline:focus {
  background: var(--accent);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.25);
}

.contact__btn:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 4px;
}

/* Projects */
.projects {
  margin-bottom: var(--spacing-xl);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

/* Project cards */
/* Float, hover, accent glow */
@keyframes floatY {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
  100% {
    transform: translateY(0);
  }
}

.project-card {
  position: relative;
  overflow: visible;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  background: var(--card);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  contain: layout style paint;
  transition:
    transform var(--transition),
    box-shadow var(--transition);
}

/* grid placement helpers */
.project-card:nth-child(1) {
  grid-column: span 4;
  grid-row: span 2;
}
.project-card:nth-child(2) {
  grid-column: span 2;
  grid-row: span 2;
}
.project-card:nth-child(3) {
  grid-column: span 3;
  grid-row: span 1;
}
.project-card:nth-child(4) {
  grid-column: span 3;
  grid-row: span 1;
}
.project-card:nth-child(5) {
  grid-column: span 6;
  grid-row: span 1;
}

.project-card:nth-child(6) {
  grid-column: span 6;
  grid-row: span 1;
}

.project-card:nth-child(7) {
  grid-column: span 6;
  grid-row: span 1;
}

.project-card__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.project-card:nth-child(1) .project-card__image {
  height: 300px;
}

.project-card__content {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card__title {
  margin: 0 0 12px;
  font-size: var(--fs-xl);
  font-weight: 600;
}

.project-card:nth-child(1) .project-card__title {
  font-size: var(--fs-section);
}

.project-card__description {
  color: var(--muted);
  margin-bottom: 16px;
  flex: 1;
  line-height: 1.6;
}

.project-card__tech-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: 16px;
}

.project-card__tech-item {
  font-size: var(--fs-xs);
  background: var(--bg);
  border-radius: var(--border-radius-sm);
  padding: 4px 12px;
  color: var(--muted);
  font-weight: 500;
}

.project-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.project-card__link {
  display: inline-block;
  font-weight: 600;
  text-decoration: none;
  color: var(--accent);
  transition: color var(--transition);
  border-radius: 4px;
}

.project-card__link:hover,
.project-card__link:focus {
  color: var(--accent-light);
}

.project-card__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* float animation helper */
.project-card--float {
  animation: floatY 6s ease-in-out infinite;
  will-change: transform, box-shadow;
}

/* pseudo-element for glow (avoids layout changes) */
.project-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: 0 0 0 rgba(59, 130, 246, 0);
  opacity: 0;
  transition:
    box-shadow 200ms ease,
    opacity 200ms ease;
}

/* hover / focus / JS class state (single source of truth) */
.project-card:hover,
.project-card:focus-within,
.project-card--hover {
  transform: translateY(-8px) scale(1.04);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.22),
    0 0 40px rgba(59, 130, 246, 0.2);
}

.project-card:hover::after,
.project-card:focus-within::after,
.project-card--hover::after {
  box-shadow: 0 0 72px 18px rgba(59, 130, 246, 0.22);
  opacity: 1;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .project-card--float {
    animation: none !important;
    transform: none !important;
  }
  .project-card::after {
    transition: none !important;
  }
}

/* Footer */

.footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  z-index: 900;
  background: var(--black);
  color: var(--white);
  box-shadow: 0 -2px 12px rgba(16, 24, 40, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  transition:
    background 0.4s,
    color 0.4s,
    box-shadow 0.4s;
}

.page:not(.page--dark) .footer {
  background: var(--white);
  color: var(--black);
  box-shadow: 0 -2px 12px rgba(37, 99, 235, 0.08);
}

.footer__text {
  flex: 1;
  font-size: var(--fs-sm);
  opacity: 0.8;
  text-align: center;
}

/* Virtual keypad */
.virtual-keypad {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  background: none;
  box-shadow: none;
  padding: 0;
  border: none;
}

.virtual-keypad__arrows {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.keypad-row {
  display: flex;
  gap: 4px;
}

.virtual-keypad__actions {
  display: flex;
  flex-direction: column;
  gap: 4px;
  justify-content: center;
  margin-left: var(--spacing-sm);
}

.keypad-btn {
  width: 30px;
  height: 30px;
  background: var(--accent);
  color: var(--white);
  border: 2px solid var(--accent-light);
  border-radius: var(--border-radius-sm);
  font-size: var(--fs-xl);
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.keypad-btn:active,
.keypad-btn--pressed {
  transform: scale(0.9);
  background: var(--accent-light);
}

.keypad-btn:hover,
.keypad-btn:focus {
  background: var(--accent-light);
  color: var(--black);
  border-color: var(--accent);
}

/* Easter egg */
.easter-egg {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  animation: fadeIn 0.5s ease;
}

.easter-egg--active {
  display: flex;
}

.easter-egg__content {
  text-align: center;
  color: var(--white);
  animation: bounceIn 0.8s ease;
  padding: var(--spacing-xl);
}

.easter-egg__title {
  font-size: var(--fs-display);
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(45deg, #f093fb, #f5576c, #4facfe);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

.easter-egg__subtitle {
  font-size: var(--fs-subheading);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}
.easter-egg__message {
  font-size: var(--fs-lg);
  color: var(--accent-light);
  font-weight: 600;
}

.easter-egg-clue {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--card);
  border: 2px solid var(--accent);
  border-radius: var(--border-radius-sm);
  padding: 12px 20px;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 1000;
  pointer-events: none;
  box-shadow: var(--shadow);
}

.easter-egg-clue--visible {
  opacity: 1;
  transform: translateY(0);
  animation: glow 2s ease infinite;
}
.easter-egg-clue__text {
  color: var(--text);
  font-size: var(--fs-sm);
  font-weight: 500;
}

/* Lego JHM Animation */
.lego-jhm-animation {
  display: block;
  position: absolute;
  left: 50%;
  top: 60%;
  transform: translate(-50%, -50%);
  width: 320px;
  height: 120px;
  pointer-events: none;
  z-index: 10001;
}

.lego-block {
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  opacity: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  will-change: transform, opacity;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes bounceIn {
  0% {
    transform: scale(0.3);
    opacity: 0;
  }
  50% {
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes glow {
  0%,
  100% {
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
  }
  50% {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.6);
  }
}

/* Media queries */
@media (max-width: 1024px) {
  .projects__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .project-card:nth-child(1) {
    grid-column: span 4;
    grid-row: span 2;
  }
  .project-card:nth-child(2),
  .project-card:nth-child(3) {
    grid-column: span 2;
    grid-row: span 1;
  }
  .project-card:nth-child(4),
  .project-card:nth-child(5),
  .project-card:nth-child(6),
  .project-card:nth-child(7) {
    grid-column: span 4;
    grid-row: span 1;
  }
}

@media (max-width: 770px) {
  .main {
    padding: var(--spacing-md);
  }
  .projects__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  .project-card,
  .project-card:nth-child(n) {
    grid-column: span 1;
    grid-row: span 1;
  }
  .project-card__image,
  .project-card:nth-child(1) .project-card__image {
    height: 200px;
  }
  .project-card:nth-child(1) .project-card__title {
    font-size: var(--fs-xl);
  }
}

@media (max-width: 570px) {
  .header__content {
    padding: 0 var(--spacing-lg) 72px;
  }
  .header__title {
    font-size: clamp(32px, 10vw, 48px); /* responsive override of --fs-hero */
  }
  .contact__links {
    flex-direction: column;
    align-items: stretch;
  }
  .contact__btn {
    justify-content: center;
  }
}