/* ==================== Buttons & Controls ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: var(--font-sans);
  border-radius: var(--radius-sm);
  text-align: center;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-on-accent);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-strong);
  border-color: var(--color-accent-strong);
  color: var(--color-on-accent);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  background: var(--color-surface);
  border-color: var(--color-text);
  color: var(--color-text);
}

.btn-full {
  width: 100%;
}

.theme-toggle {
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--color-border);
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition:
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.sun-icon,
.moon-icon {
  position: absolute;
}

html[data-theme="dark"] .sun-icon {
  display: none;
}

html:not([data-theme="dark"]) .moon-icon {
  display: none;
}

/* ==================== Tags & Labels ==================== */
.tech-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 450;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.status-dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

/* ==================== Surfaces & Cards ==================== */
.surface-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.hero-cta,
.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* ==================== Forms ==================== */
.form-group {
  margin-bottom: 1.6rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0;
  border: none;
  border-bottom: 1px solid var(--color-border-strong);
  border-radius: 0;
  background: transparent;
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-group select {
  cursor: pointer;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-text);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-subtle);
}

.form-group input[aria-invalid="true"],
.form-group select[aria-invalid="true"],
.form-group textarea[aria-invalid="true"] {
  border-color: var(--color-danger);
}

.error-message {
  display: block;
  min-height: 1.25rem;
  margin-top: 0.4rem;
  font-size: 0.8125rem;
  color: var(--color-danger);
}

.form-status {
  margin-top: 1.25rem;
  font-size: 0.9375rem;
}

.form-status.success,
.form-status.error {
  padding: 0.9rem 1.1rem;
  border-left: 2px solid;
  background: var(--color-surface);
}

.form-status.success {
  color: var(--color-success);
  border-color: var(--color-success);
}

.form-status.error {
  color: var(--color-danger);
  border-color: var(--color-danger);
}

/* ==================== Education Card ==================== */
.education-card {
  padding: 2rem;
}

@media (min-width: 768px) {
  .education-card {
    padding: 2.5rem;
  }
}

.education-logo {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  background: #ffffff;
  border: 1px solid var(--color-border);
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.education-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ==================== Project Rows (editorial list) ==================== */
.project-rows {
  display: flex;
  flex-direction: column;
}

.project-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 3rem 0;
  border-top: 1px solid var(--color-border);
  align-items: center;
}

.project-rows > .project-row:first-child {
  border-top: none;
  padding-top: 0;
}

@media (min-width: 860px) {
  .project-row {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    padding: 4.5rem 0;
  }

  .project-row:nth-child(even) .project-row-media {
    order: 2;
  }

  .project-row:nth-child(even) .project-row-body {
    order: 1;
  }
}

.project-row-media {
  display: block;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 11;
  background: var(--color-surface);
}

/* Screenshots vary in aspect ratio; contain keeps headlines from being
   cropped out of the frame. */
.project-row-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.9s var(--ease);
}

.project-row:hover .project-row-media img {
  transform: scale(1.02);
}

.project-row-media-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-style: italic;
  color: var(--color-text-subtle);
  background: var(--color-surface);
}

.project-row-index {
  display: block;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-subtle);
  margin-bottom: 0.85rem;
}

.project-row-title {
  margin-bottom: 0.85rem;
}

.project-row-title a {
  color: var(--color-text);
}

.project-row-title a:hover {
  color: var(--color-accent);
}

.project-row-tagline {
  margin-bottom: 1.15rem;
}

.project-row-outcome {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.0625rem;
  line-height: var(--line-height-snug);
  color: var(--color-text);
  margin-bottom: 1.5rem;
  padding-left: 1.15rem;
  border-left: 1px solid var(--color-border-strong);
  max-width: 46ch;
}

.project-row-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.project-row-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-text);
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--color-border-strong);
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.project-row-cta svg {
  width: 15px;
  height: 15px;
  transition: transform var(--transition-fast);
}

.project-row-cta:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.project-row-cta:hover svg {
  transform: translateX(3px);
}

.projects-section-cta {
  margin-top: 3rem;
}