/* ============================================================
   Components: Navbar, Hero, About, Timeline, Projects, etc.
   ============================================================ */

/* ---- 全局颜色过渡（主题切换平滑动画） ---- */
.navbar,
.navbar__container,
.navbar__logo,
.navbar__menu,
.navbar__link,
.navbar__actions,
.theme-toggle,
.hero,
.hero__content,
.hero__greeting,
.hero__title,
.hero__subtitle,
.hero__description,
.hero__actions,
.hero__social a,
.hero__scroll,
.about__info-item,
.skill-tag,
.skills__bars,
.timeline,
.timeline__content,
.timeline__period,
.timeline__title,
.timeline__company,
.timeline__desc,
.project-card,
.project-card__title,
.project-card__desc,
.filter-btn,
.education__card,
.contact__form-wrapper,
.contact__item,
.contact__social-link,
.footer,
.footer__links a,
.back-to-top {
  transition: color var(--transition-slow),
              background-color var(--transition-slow),
              border-color var(--transition-slow),
              box-shadow var(--transition-slow);
}

/* ============================================================
   Navbar
   ============================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background: var(--navbar-bg);
  backdrop-filter: blur(var(--navbar-blur));
  -webkit-backdrop-filter: blur(var(--navbar-blur));
  border-bottom: 1px solid var(--navbar-border);
  box-shadow: 0 0 10px rgba(0,255,240,0.3), 0 0 20px rgba(0,255,240,0.1);
  z-index: var(--z-navbar);
  transition: all var(--transition-base);
}

.navbar--scrolled {
  box-shadow: var(--shadow-md);
}

.navbar__container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  z-index: 1001;
}

.navbar__logo-icon {
  color: var(--color-accent-blue);
  font-family: monospace;
  font-size: var(--font-size-xl);
}

.navbar__logo-text {
  background: linear-gradient(135deg, #00d4ff, #ff0080);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.navbar__link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  padding: var(--space-xs) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #ff0080, #ff4da6);
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

.navbar__link:hover,
.navbar__link:focus-visible {
  color: var(--color-accent-blue);
}

.navbar__link:hover::after,
.navbar__link:focus-visible::after {
  width: 100%;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Theme Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
  position: relative;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  color: #ff0080;
  background: rgba(255, 0, 128, 0.15);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  z-index: 1001;
}

.hamburger__line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}

.hamburger--active .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger--active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger--active .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   Hero Section
   ============================================================ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 255, 240, 0.015) 2px,
    rgba(0, 255, 240, 0.015) 4px
  );
  pointer-events: none;
  z-index: 4;
}

.hero__canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at center, transparent 30%, #0a0015 80%);
  z-index: 2;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 800px;
  padding: 0 var(--space-xl);
  padding-top: var(--navbar-height);
}

.hero__greeting {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: #ff0080;
  margin-bottom: var(--space-md);
  letter-spacing: 2px;
  position: relative;
  display: inline-block;
  text-shadow: 0 0 10px rgba(255, 0, 128, 0.5), 0 0 20px rgba(255, 0, 128, 0.3);
}

.hero__greeting::before {
  content: '[';
  margin-right: var(--space-sm);
  opacity: 0.7;
}

.hero__greeting::after {
  content: ']';
  margin-left: var(--space-sm);
  opacity: 0.7;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, #00d4ff, #ff0080);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -2px;
  text-shadow: 0 0 30px rgba(0, 212, 255, 0.3), 0 0 60px rgba(255, 0, 128, 0.2);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  min-height: 1.6em;
}

.hero__typing {
  border-right: 2px solid var(--color-accent-blue);
  padding-right: 4px;
  animation: blink-cursor 0.8s step-end infinite;
}

@keyframes blink-cursor {
  50% { border-color: transparent; }
}

.hero__description {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto var(--space-xl);
  line-height: var(--line-height-relaxed);
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.hero__social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.hero__social a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.hero__social a:hover,
.hero__social a:focus-visible {
  color: #ff0080;
  border-color: #ff0080;
  background: rgba(255, 0, 128, 0.15);
  transform: translateY(-3px);
  box-shadow: 0 0 20px rgba(255, 0, 128, 0.4), 0 0 40px rgba(255, 0, 128, 0.2);
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
}

.hero__scroll-text {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, #00d4ff, #ff0080, transparent);
  animation: scroll-indicator 2s ease-in-out infinite;
}

@keyframes scroll-indicator {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.3; transform: scaleY(0.5); }
}

/* ============================================================
   About Section
   ============================================================ */

.about {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
  align-items: start;
  margin-bottom: var(--space-3xl);
}

.about__left {
  display: flex;
  justify-content: center;
}

.about__avatar-wrapper {
  position: relative;
  width: 240px;
  height: 240px;
}

.about__avatar {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  position: relative;
  z-index: 1;
  background: var(--color-bg-elevated);
}

.about__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about__avatar-border {
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: calc(var(--radius-2xl) + 4px);
  background: linear-gradient(135deg, #ff0080, #00d4ff, #ff0080, #00d4ff);
  background-size: 300% 300%;
  z-index: 0;
  opacity: 0.7;
  animation: border-pulse 3s ease-in-out infinite;
}

@keyframes border-pulse {
  0% { background-position: 0% 50%; filter: hue-rotate(0deg); opacity: 0.5; }
  50% { background-position: 100% 50%; opacity: 0.8; }
  100% { background-position: 0% 50%; filter: hue-rotate(360deg); opacity: 0.5; }
}

.about__heading {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

.about__text {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
}

.about__info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
}

.about__info-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid #ff0080;
  box-shadow: 0 0 8px rgba(255, 0, 128, 0.15);
}

.about__info-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.about__info-label i {
  color: #00d4ff;
  font-size: 10px;
  text-shadow: 0 0 6px rgba(0, 212, 255, 0.5);
}

.about__info-value {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

/* ---- Skill Tags (Tag Cloud) ---- */

.skills__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.skill-tag {
  padding: 0.35rem 0.85rem;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
  cursor: default;
}

.skill-tag:hover {
  border-color: #ff0080;
  color: #ff0080;
  background: rgba(255, 0, 128, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 0 12px rgba(255, 0, 128, 0.3);
}

/* Vary tag sizes by skill level */
.skill-tag[data-level="95"] { font-size: var(--font-size-base); }
.skill-tag[data-level="92"] { font-size: 0.95rem; }
.skill-tag[data-level="90"] { font-size: 0.95rem; }
.skill-tag[data-level="88"] { font-size: 0.9rem; }
.skill-tag[data-level="85"] { font-size: 0.9rem; }
.skill-tag[data-level="83"] { font-size: 0.875rem; }
.skill-tag[data-level="82"] { font-size: 0.875rem; }
.skill-tag[data-level="80"] { font-size: 0.85rem; }
.skill-tag[data-level="78"] { font-size: 0.85rem; }
.skill-tag[data-level="75"] { font-size: 0.8rem; }
.skill-tag[data-level="72"] { font-size: 0.8rem; }
.skill-tag[data-level="70"] { font-size: 0.8rem; }

/* ---- Skill Bars ---- */

.skills__bars {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  border: 1px solid var(--color-border-card);
}

.skills__bars-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-xl);
  text-align: center;
}

.skills__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.skill-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.skill-bar__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.skill-bar__name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.skill-bar__percent {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-accent-blue);
}

.skill-bar__track {
  width: 100%;
  height: 8px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-bar__fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.skill-bar__fill::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-full);
}

/* ============================================================
   Timeline (Work Experience)
   ============================================================ */

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: var(--space-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: var(--space-sm);
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, #00d4ff, #ff0080, transparent);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-2xl);
  padding-left: var(--space-xl);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: calc(-1 * var(--space-xl) + 1px);
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: var(--radius-full);
  background: var(--color-bg-primary);
  border: 3px solid #00d4ff;
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
  z-index: 2;
  transform: translateX(-50%);
  transition: all var(--transition-base);
}

.timeline__item:hover .timeline__dot {
  background: #ff0080;
  border-color: #ff0080;
  box-shadow: 0 0 16px rgba(255, 0, 128, 0.6);
}

.timeline__content {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  border: 1px solid var(--color-border-card);
  transition: all var(--transition-base);
}

.timeline__content:hover {
  border-color: #ff0080;
  box-shadow: var(--shadow-md), 0 0 20px rgba(255, 0, 128, 0.2);
  transform: translateX(4px);
}

.timeline__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.timeline__period {
  font-size: var(--font-size-xs);
  color: #00d4ff;
  font-weight: var(--font-weight-medium);
  text-shadow: 0 0 6px rgba(0, 212, 255, 0.5);
}

.timeline__tag {
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 0, 128, 0.2);
  color: #ff0080;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.timeline__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.timeline__company {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-regular);
  margin-bottom: var(--space-sm);
}

.timeline__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-sm);
}

.timeline__achievements {
  list-style: none;
  padding: 0;
}

.timeline__achievements li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding: var(--space-xs) 0;
  padding-left: var(--space-md);
  position: relative;
}

.timeline__achievements li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: #ff0080;
  font-weight: var(--font-weight-bold);
  text-shadow: 0 0 6px rgba(255, 0, 128, 0.5);
}

/* ============================================================
   Projects Section
   ============================================================ */

.projects__filter {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-card);
  transition: all var(--transition-base);
  cursor: pointer;
}

.filter-btn:hover,
.filter-btn:focus-visible {
  border-color: var(--color-accent-blue);
  color: var(--color-accent-blue);
}

.filter-btn--active {
  background: linear-gradient(135deg, #00d4ff, #ff0080);
  color: white;
  border-color: transparent;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3), 0 0 20px rgba(255, 0, 128, 0.3);
}

.filter-btn--active:hover {
  color: white;
  border-color: transparent;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.project-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border-card);
  box-shadow: 0 0 12px rgba(255, 0, 128, 0.15);
  transition: all var(--transition-spring);
  position: relative;
}

.project-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: #ff0080;
  box-shadow: var(--shadow-lg), 0 0 30px rgba(255, 0, 128, 0.3);
}

.project-card__image {
  width: 100%;
  height: 200px;
  background: var(--color-bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.project-card__image i {
  font-size: 3rem;
  color: #ff0080;
  opacity: 0.6;
  text-shadow: 0 0 20px rgba(255, 0, 128, 0.4);
}

.project-card__image::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(to top, var(--color-bg-card), transparent);
}

.project-card__body {
  padding: var(--space-lg);
}

.project-card__category {
  font-size: 0.7rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #ff0080;
  margin-bottom: var(--space-sm);
}

.project-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.project-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.project-card__tech span {
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background: rgba(255, 0, 128, 0.15);
  color: #ff0080;
}

.project-card__links {
  display: flex;
  gap: var(--space-md);
}

.project-card__links a {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  transition: color var(--transition-fast);
}

.project-card__links a:hover,
.project-card__links a:focus-visible {
  color: var(--color-accent-blue);
}

/* Project card filter animation */
.project-card--hidden {
  display: none;
}

.project-card--visible {
  animation: card-fade-in 0.5s ease forwards;
}

@keyframes card-fade-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ============================================================
   Education Section
   ============================================================ */

.education {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.education__card {
  display: flex;
  gap: var(--space-lg);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-card);
  transition: all var(--transition-base);
}

.education__card:hover {
  border-color: #ff0080;
  box-shadow: var(--shadow-md), 0 0 20px rgba(255, 0, 128, 0.25);
  transform: translateY(-4px);
}

.education__icon {
  width: 56px;
  height: 56px;
  min-width: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #00d4ff, #ff0080);
  color: white;
  font-size: var(--font-size-xl);
}

.education__info {
  flex: 1;
}

.education__degree {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.education__school {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
}

.education__period {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: #fff;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-sm);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 0, 128, 0.25);
}

.education__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* ============================================================
   Contact Section
   ============================================================ */

.contact {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact__form-wrapper {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  border: 1px solid #00d4ff;
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.15), inset 0 0 15px rgba(0, 212, 255, 0.05);
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.form__label span {
  color: var(--color-accent-blue);
}

.form__input,
.form__textarea {
  padding: 0.75rem 1rem;
  background: var(--color-bg-secondary);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  width: 100%;
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--color-text-muted);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: #ff0080;
  box-shadow: 0 0 0 3px rgba(255, 0, 128, 0.2), 0 0 12px rgba(255, 0, 128, 0.2);
}

.form__input--error,
.form__textarea--error {
  border-color: #ef4444;
}

.form__error {
  font-size: var(--font-size-xs);
  color: #ef4444;
  min-height: 0;
  transition: all var(--transition-fast);
}

.form__group:has(.form__error:not(:empty)) .form__error {
  min-height: 1em;
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.form__success {
  text-align: center;
  padding: var(--space-2xl);
}

.form__success i {
  font-size: 3rem;
  color: var(--color-accent-green);
  margin-bottom: var(--space-md);
}

.form__success p {
  color: var(--color-text-secondary);
}

/* Contact Info */
.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact__heading {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.contact__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.contact__item-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: rgba(255, 0, 128, 0.15);
  color: #00d4ff;
  font-size: var(--font-size-lg);
}

.contact__item-label {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.contact__item-value {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

a.contact__item-value:hover {
  color: var(--color-accent-blue);
}

.contact__social {
  margin-top: var(--space-md);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.contact__social-heading {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.contact__social-links {
  display: flex;
  gap: var(--space-sm);
}

.contact__social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  border: 1px solid var(--color-border-card);
  transition: all var(--transition-base);
}

.contact__social-link:hover,
.contact__social-link:focus-visible {
  color: #ff0080;
  border-color: #ff0080;
  background: rgba(255, 0, 128, 0.15);
  transform: translateY(-3px);
  box-shadow: 0 0 20px rgba(255, 0, 128, 0.3);
}

/* ============================================================
   Footer
   ============================================================ */

.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -5px 15px rgba(0, 255, 240, 0.2);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer__logo {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: monospace;
}

.footer__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  line-height: var(--line-height-relaxed);
}

.footer__heading {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer__links ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links a,
.footer__links span {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: #ff0080;
}

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__bottom p {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.back-to-top {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  cursor: pointer;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: linear-gradient(135deg, #00d4ff, #ff0080);
  color: white;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3), 0 0 20px rgba(255, 0, 128, 0.3);
  transform: translateY(-3px);
}