/* ==========================================================================
   Shared Components — Nav, Buttons, Forms, Tags, Footer
   These are styled by the theme. Swap this file for a different look.
   ========================================================================== */

/* --- Screen Reader Only --- */

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

/* --- Skip Link --- */

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 200;
  padding: 0.5rem 1rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 500;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.5rem;
}

/* --- Navigation --- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav-brand:hover { color: var(--color-purple); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-link:hover { color: var(--color-text); }
.nav-resume-link[href=""] { display: none; }

.nav-link.active {
  color: var(--color-text);
  position: relative;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-purple);
  border-radius: 1px;
}

@media (max-width: 768px) {
  .nav-link.active::after { display: none; }
  .nav-link.active { color: var(--color-primary); }
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--radius);
  display: flex;
  transition: color var(--transition), background var(--transition);
}

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

.theme-toggle svg {
  transition: opacity 0.3s ease, transform 0.3s ease;
  position: absolute;
}

@media (prefers-reduced-motion: reduce) {
  .theme-toggle svg { transition: none; }
  .nav-hamburger span { transition: none; }
  .nav-links { transition: none; }
  .nav-overlay { transition: none; }
}

.theme-toggle {
  position: relative;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
}

[data-theme="dark"] .icon-sun { opacity: 1; transform: rotate(0deg); }
[data-theme="dark"] .icon-moon { opacity: 0; transform: rotate(-90deg); }
[data-theme="light"] .icon-sun { opacity: 0; transform: rotate(90deg); }
[data-theme="light"] .icon-moon { opacity: 1; transform: rotate(0deg); }

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  padding: 0.4rem;
}

.nav-hamburger span {
  width: 20px;
  height: 2px;
  background: var(--color-text-muted);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg-raised);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
    gap: 1rem;
    z-index: 101;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-link { font-size: 1.1rem; }
}

.nav-overlay {
  position: fixed;
  inset: 0;
  top: 60px;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-sans);
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
  background: var(--color-primary-muted);
}

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

.btn-accent:hover {
  background: var(--color-purple-hover);
  border-color: var(--color-purple-hover);
  color: #fff;
}

.btn-danger {
  background: transparent;
  color: var(--color-danger);
  border-color: var(--color-danger);
}

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

.btn-sm {
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
}

/* --- Forms & Inputs --- */

.input, input, textarea, [contenteditable] {
  caret-color: var(--color-primary);
}

.input {
  width: 100%;
  padding: 0.6rem 0.9rem;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-muted);
}

.input::placeholder { color: var(--color-text-faint); }

.textarea {
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.5;
  min-height: 200px;
}

.form { max-width: 600px; }
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

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

.form-group-grow { flex: 1; }

.form-error {
  color: var(--color-danger);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

@media (max-width: 640px) {
  .form-row { flex-direction: column; gap: 0; }
}

/* --- Tags (Pill Style) --- */

.tag {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  pointer-events: none;
}

.tag-filter {
  cursor: pointer;
  pointer-events: auto;
  color: var(--color-primary);
  background: var(--color-primary-muted);
  border: 1px solid var(--color-border);
  font-family: var(--font-sans);
}

.tag-filter:hover {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.tag-active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.tag-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* --- Footer --- */

.footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--color-text-faint);
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--color-text-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: color var(--transition), background var(--transition);
}

.footer-links a:hover {
  color: var(--color-purple);
  background: var(--color-purple-muted);
}

@media (max-width: 640px) {
  .footer-inner {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}