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

:root {
  --bg-primary: #0b0e18;
  --bg-section: #0f1322;
  --bg-card: #141a2e;
  --bg-hover: #182040;
  --klein: #002fa7;
  --klein-light: #2b5cd6;
  --klein-glow: rgba(0, 47, 167, 0.2);
  --silver: #c0c8d8;
  --text-primary: #dce1eb;
  --text-secondary: #7a8499;
  --text-desc: #566078;
  --border-subtle: rgba(43, 92, 214, 0.08);
  --border-radius: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
  position: relative;
  overflow-x: hidden;
}

#particles {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.container {
  max-width: 620px;
  width: 100%;
  position: relative;
  z-index: 1;
}

/* ── Profile ── */
.profile {
  text-align: center;
  margin-bottom: 1.5rem;
}

.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 25%;
  display: block;
  border: 2px solid rgba(43, 92, 214, 0.3);
  box-shadow: 0 0 40px var(--klein-glow);
  animation: pulse-glow 4s ease-in-out infinite;
}

.avatar-btn {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  border-radius: 50%;
  margin: 0 auto 1rem;
  display: block;
  transition: transform 0.2s ease;
}

.avatar-btn:hover { transform: scale(1.05); }
.avatar-btn:focus-visible { outline: 2px solid var(--klein-light); outline-offset: 4px; }

/* ── Lightbox ── */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 14, 0.92);
  backdrop-filter: blur(12px);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lightbox.open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 12px;
  object-fit: contain;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.lightbox.open .lightbox-img {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: #fff;
  font-size: 1.2rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.lightbox-close:hover { background: rgba(255, 255, 255, 0.15); }

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 30px var(--klein-glow); }
  50% { box-shadow: 0 0 50px rgba(0, 47, 167, 0.35); }
}

.profile h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.contact-info {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.contact-link:hover { color: var(--klein-light); }

/* ── Sections ── */
.link-section {
  margin-bottom: 0.75rem;
  background: var(--bg-section);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.link-section:hover {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

.section-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.15rem;
  background: transparent;
  border: none;
  cursor: pointer;
  color: inherit;
  font-family: inherit;
}

.section-header:focus-visible {
  outline: 2px solid var(--klein-light);
  outline-offset: -2px;
}

.section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--klein-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
}

.section-title i { font-size: 0.8rem; }

.section-chevron {
  font-size: 0.65rem;
  color: var(--text-secondary);
  transition: transform var(--transition);
}

.section-header[aria-expanded="false"] .section-chevron {
  transform: rotate(-90deg);
}

.links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0 0.85rem 0.85rem;
  max-height: 2000px;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease, opacity 0.3s ease;
  opacity: 1;
}

.links.collapsed {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
}

/* ── Link Buttons ── */
.link-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border-radius: 10px;
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.link-btn::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 3px;
  background: var(--klein-light);
  transform: scaleY(0);
  transition: transform 0.25s ease;
}

.link-btn:hover {
  background: var(--bg-hover);
  transform: translateX(4px);
  border-color: rgba(43, 92, 214, 0.15);
  box-shadow: 0 2px 12px var(--klein-glow);
}

.link-btn:hover::before { transform: scaleY(1); }

.link-btn > i {
  font-size: 1.05rem;
  width: 22px;
  text-align: center;
  color: var(--klein-light);
  flex-shrink: 0;
}

.link-btn:focus-visible {
  outline: 2px solid var(--klein-light);
  outline-offset: 2px;
}

.link-content {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.link-name { font-size: 0.88rem; font-weight: 500; }

.link-desc {
  font-size: 0.72rem;
  color: var(--text-desc);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Modal Triggers ── */
.modal-trigger {
  cursor: pointer;
  border: none;
  width: 100%;
  font-family: inherit;
  text-align: left;
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 14, 0.85);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-section);
  border: 1px solid rgba(43, 92, 214, 0.2);
  border-radius: 16px;
  padding: 2rem 1.75rem;
  max-width: 380px;
  width: 100%;
  text-align: center;
  position: relative;
  transform: translateY(20px) scale(0.95);
  transition: transform 0.3s ease;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-overlay.open .modal-card {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.modal-close:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.modal-icon {
  font-size: 2rem;
  color: var(--klein-light);
  margin-bottom: 0.75rem;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.modal-qr {
  background: #fff;
  border-radius: 12px;
  padding: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.modal-qr:empty { display: none; }

.modal-qr canvas,
.modal-qr img {
  display: block;
  width: 160px !important;
  height: 160px !important;
  image-rendering: pixelated;
}

.modal-key-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 47, 167, 0.06);
  border: 1px solid rgba(43, 92, 214, 0.15);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  margin-bottom: 1rem;
}

.modal-key {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.72rem;
  color: var(--silver);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  user-select: all;
  text-align: left;
}

.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.modal-actions:empty { display: none; }

.modal-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--klein);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}

.modal-action-btn:hover {
  background: var(--klein-light);
}

/* ── WIP Badge ── */
.wip-badge {
  display: inline-block;
  font-size: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  background: rgba(122, 132, 153, 0.15);
  padding: 1px 6px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 4px;
}

/* ── Copy Button (in modal) ── */
.copy-btn {
  background: rgba(43, 92, 214, 0.15);
  border: 1px solid rgba(43, 92, 214, 0.2);
  color: var(--klein-light);
  width: 30px;
  height: 30px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  transition: all var(--transition);
}

.copy-btn:hover {
  background: var(--klein);
  color: #fff;
}

.copy-btn.copied {
  background: #1a7a3a;
  border-color: #1a7a3a;
  color: #fff;
}

/* ── Back to Top ── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  z-index: 10;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--klein);
  color: #fff;
  box-shadow: 0 4px 20px var(--klein-glow);
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card);
  border: 1px solid rgba(43, 92, 214, 0.3);
  color: var(--text-primary);
  padding: 0.65rem 1.25rem;
  border-radius: 10px;
  font-size: 0.82rem;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

footer {
  text-align: center;
  padding: 2rem 0 1rem;
  color: var(--text-secondary);
  font-size: 0.72rem;
}

/* ── Animations ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.profile { animation: fadeInUp 0.5s ease forwards; }

.link-section {
  animation: fadeInUp 0.4s ease forwards;
  opacity: 0;
}

.link-section:nth-of-type(1) { animation-delay: 0.08s; }
.link-section:nth-of-type(2) { animation-delay: 0.12s; }
.link-section:nth-of-type(3) { animation-delay: 0.16s; }
.link-section:nth-of-type(4) { animation-delay: 0.20s; }
.link-section:nth-of-type(5) { animation-delay: 0.24s; }
.link-section:nth-of-type(6) { animation-delay: 0.28s; }
.link-section:nth-of-type(7) { animation-delay: 0.32s; }
.link-section:nth-of-type(8) { animation-delay: 0.36s; }
.link-section:nth-of-type(9) { animation-delay: 0.40s; }
.link-section:nth-of-type(10) { animation-delay: 0.44s; }
.link-section:nth-of-type(11) { animation-delay: 0.48s; }

@media (max-width: 480px) {
  body { padding: 1.5rem 0.75rem; }
  .profile h1 { font-size: 1.4rem; }
  .contact-info { flex-direction: column; align-items: center; gap: 0.4rem; }
  .link-btn { padding: 0.65rem 0.85rem; }
  .link-name { font-size: 0.84rem; }
  .back-to-top { bottom: 1rem; right: 1rem; }
  .widget-qr canvas, .widget-qr img { width: 120px !important; height: 120px !important; }
  .key-display { max-width: 100%; }
}

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