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

:root {
  --bg: #0f0f0f;
  --card-bg: #1a1a2e;
  --text: #eee;
  --text-muted: #aaa;
  --accent: #6c63ff;
  --accent-hover: #5a52e0;
  --border: #2a2a3e;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
}

body.light {
  --bg: #f5f5fb;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-muted: #666;
  --accent: #63ffa7;
  --accent-hover: #0d077a;
  --border: #ddd;
  --shadow: 0 8px 32px rgba(0,0,0,0.08);
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background 0.4s, color 0.4s;
}

.container {
  width: 100%;
  max-width: 420px;
  padding: 2rem 1.5rem;
  text-align: center;
}

/* ── Profile ── */
.profile {
  margin-bottom: 2rem;
}

.avatar img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  box-shadow: 0 0 20px rgba(108,99,255,0.3);
  transition: transform 0.3s;
}

.avatar img:hover {
  transform: scale(1.05);
}

.name {
  margin-top: 1rem;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 2px;
}

.bio {
  margin-top: 0.3rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Links ── */
.links {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.2rem;
  border-radius: 14px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 1rem;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.link-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent);
  transform: scaleY(0);
  transition: transform 0.25s ease;
}

.link-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

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

.link-card i {
  font-size: 1.3rem;
  width: 28px;
  text-align: center;
  color: var(--accent);
  transition: transform 0.25s;
}

.link-card:hover i {
  transform: scale(1.15);
}

.link-card .label {
  flex: 1;
  text-align: left;
}

.link-card .arrow {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: transform 0.25s;
}

.link-card:hover .arrow {
  transform: translateX(4px);
  color: var(--accent);
}

/* ── Footer ── */
footer {
  margin-top: 2.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── Theme Toggle ── */
.theme-toggle {
  position: fixed;
  top: 1.2rem;
  right: 1.2rem;
}

#theme-btn {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

#theme-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* ── Toast notification ── */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.7rem 1.4rem;
  border-radius: 10px;
  font-size: 0.85rem;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: all 0.35s ease;
  pointer-events: none;
  z-index: 99;
  white-space: nowrap;
}

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

/* ── Responsive ── */
@media (max-width: 480px) {
  .container { padding: 1.5rem 1rem; }
  .name { font-size: 1.35rem; }
  .link-card { padding: 0.8rem 1rem; }
}