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

:root {
  --bg: #f9f9f8;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #0a66c2;
  --accent-hover: #0854a5;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.07);
  --toggle-bg: #e5e7eb;
  --toggle-hover: #d1d5db;
}

[data-theme="dark"] {
  --bg: #111111;
  --surface: #1c1c1c;
  --text: #f0ede8;
  --muted: #9ca3af;
  --border: #2e2e2e;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
  --toggle-bg: #2e2e2e;
  --toggle-hover: #3a3a3a;
}

html {
  transition: background 0.2s, color 0.2s;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  line-height: 1.6;
  transition: background 0.2s, color 0.2s;
}

/* Dark mode toggle */
.theme-toggle {
  position: fixed;
  top: 1.1rem;
  right: 1.1rem;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: none;
  background: var(--toggle-bg);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s;
  z-index: 100;
}

.theme-toggle:hover {
  background: var(--toggle-hover);
}

.theme-toggle:active {
  transform: scale(0.92);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  transition: opacity 0.2s, transform 0.2s;
}

.theme-toggle .icon-moon {
  opacity: 0;
  transform: rotate(-30deg) scale(0.8);
}

[data-theme="dark"] .theme-toggle .icon-sun {
  opacity: 0;
  transform: rotate(30deg) scale(0.8);
}

[data-theme="dark"] .theme-toggle .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 3rem 2.5rem;
  max-width: 480px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Avatar */
.avatar-wrap {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--border);
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}

.avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Name & role */
.name {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.2rem;
}

.role {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Bio */
.bio {
  font-size: 0.975rem;
  color: var(--muted);
  max-width: 360px;
  margin-bottom: 1.75rem;
}

/* Links */
.links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background 0.15s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

/* LinkedIn icon-only button */
.btn-linkedin {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s, opacity 0.15s;
}

.btn-linkedin:hover {
  opacity: 0.8;
  transform: scale(1.1);
}

/* Divider */
.divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 2rem 0;
}

/* Contact form */
.contact {
  width: 100%;
  text-align: left;
}

.contact h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  text-align: center;
  color: var(--text);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

label {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

input,
textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  transition: border-color 0.15s;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: #b0b8c4;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
}

.btn-submit {
  background: var(--text);
  color: var(--surface);
  width: 100%;
  justify-content: center;
  padding: 0.7rem;
  font-size: 0.95rem;
  border-radius: 8px;
  margin-top: 0.25rem;
  opacity: 1;
  transition: opacity 0.15s, transform 0.1s;
}

.btn-submit:hover {
  opacity: 0.85;
}

.btn-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  font-size: 0.875rem;
  text-align: center;
  min-height: 1.2em;
}

.form-status.success {
  color: #16a34a;
}

.form-status.error {
  color: #dc2626;
}

@media (max-width: 520px) {
  .card {
    padding: 2rem 1.5rem;
  }
}