/* =============================================================
   SPRUCE PROJECT — Components
   Nav, buttons, forms, cards, placeholders
   ============================================================= */

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding-inline: var(--container-pad);
  transition: background-color var(--duration-base) var(--ease-out);
}

.nav.scrolled {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text);
  flex-shrink: 0;
}

.nav__logo-img {
  height: 28px;
  width: auto;
  flex-shrink: 0;
}

.nav__logo:hover {
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-left: auto;
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-neutral);
  position: relative;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-out);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link.active::after {
  transform: scaleX(1);
}

.nav__link.active {
  color: var(--color-accent);
}

/* Nav utility controls (lang, palette) */
.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-left: var(--space-lg);
}

.nav__toggle {
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-muted);
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition:
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.nav__toggle:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
}

/* Mobile nav */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  margin-left: auto;
  cursor: pointer;
  padding: var(--space-md);
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background-color: var(--color-text);
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}

@media (max-width: 768px) {
  .nav__hamburger { display: flex; }

  .nav__logo-img {
    height: 18px;
  }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-md) var(--container-pad) var(--space-lg);
    border-top: 1px solid var(--color-border);
    transform: translateY(-110%);
    opacity: 0;
    transition:
      transform var(--duration-base) var(--ease-out),
      opacity var(--duration-fast) var(--ease-out);
    margin-left: 0;
  }

  .nav__links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav__link {
    padding-block: var(--space-md);
    font-size: var(--text-base);
    border-bottom: 1px solid var(--color-border);
    width: 100%;
  }

  .nav__controls {
    margin-left: 0;
    padding-top: var(--space-md);
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-sm);
  transition:
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border: 1px solid var(--color-accent);
}

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

.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

/* --- Image Placeholders --- */
.placeholder {
  width: 100%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

/* Aspect ratio via padding trick */
.placeholder[data-ratio="16/9"]  { padding-top: 56.25%; }
.placeholder[data-ratio="4/3"]   { padding-top: 75%; }
.placeholder[data-ratio="3/2"]   { padding-top: 66.67%; }
.placeholder[data-ratio="1/1"]   { padding-top: 100%; }
.placeholder[data-ratio="21/9"]  { padding-top: 42.86%; }

/* Diagonal crosshatch pattern */
.placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      45deg,
      var(--color-border) 0,
      var(--color-border) 1px,
      transparent 0,
      transparent 50%
    );
  background-size: 20px 20px;
  opacity: 0.4;
}

/* Ratio label */
.placeholder::after {
  content: attr(data-ratio);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: var(--tracking-wide);
  color: var(--color-muted);
  text-transform: uppercase;
}

/* --- Forms --- */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.field label {
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-neutral);
}

.field input,
.field textarea {
  background-color: transparent;
  border: 0;
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-md);
  font-size: var(--text-base);
  color: var(--color-text);
  transition:
    border-color var(--duration-fast) var(--ease-out);
}

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

.field textarea {
  resize: vertical;
  min-height: 140px;
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--color-muted);
}

/* --- Alerts --- */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}

.alert--success {
  background-color: rgba(98, 146, 158, 0.15);
  border: 1px solid rgba(98, 146, 158, 0.4);
  color: var(--color-accent);
}

.alert--error {
  background-color: rgba(220, 100, 80, 0.15);
  border: 1px solid rgba(220, 100, 80, 0.4);
  color: #e07060;
}

/* --- Project Card --- */
.project-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.project-card__body {
  padding: var(--space-md) 0;
}

.project-card__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semi);
  margin-bottom: var(--space-xs);
}

.project-card__desc {
  font-size: var(--text-sm);
  color: var(--color-neutral);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.project-card__img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  transition: transform var(--duration-base) var(--ease-out);
}

.project-card:hover .project-card__img {
  transform: scale(1.02);
}

.project-card .placeholder {
  transition: transform var(--duration-base) var(--ease-out);
}

.project-card:hover .placeholder {
  transform: scale(1.02);
}

/* --- Section labels --- */
.section-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semi);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

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