/* =============================================================================
   FORGE — Components
   Buttons, Cards, Tags, Timeline, Forms, Breadcrumbs, Header, Footer
   ============================================================================= */

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-header);
  transition: height var(--duration-normal) var(--ease-default),
              border-color var(--duration-normal) var(--ease-default);
}

.site-header.scrolled {
  height: var(--header-height-scrolled);
  border-bottom-color: var(--color-accent-border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-mono);
  font-weight: var(--weight-bold);
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--color-accent);
  text-decoration: none;
}

.logo .slash {
  color: var(--color-text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-decoration: none;
  position: relative;
  transition: color var(--duration-fast) var(--ease-default);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text-primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
}

/* --- Nav Dropdown --- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding-top: 16px;
  min-width: 200px;
  z-index: 10;
}

.nav-dropdown-inner {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  padding: var(--space-3) 0;
}

.nav-dropdown-inner a {
  display: block;
  padding: var(--space-2) var(--space-6);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default),
              background var(--duration-fast) var(--ease-default);
  white-space: nowrap;
}

.nav-dropdown-inner a:hover {
  color: var(--color-accent);
  background: rgba(255, 107, 26, 0.05);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  display: block;
}

/* Mobile nav sub-links */
.mobile-nav-sub {
  font-size: var(--text-sm) !important;
  padding-left: var(--space-6);
  opacity: 0.7;
}

.mobile-nav-sub:hover {
  opacity: 1;
}

.nav-resume {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  background: var(--color-accent);
  padding: 10px 20px;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: background var(--duration-fast) var(--ease-default),
              transform var(--duration-fast) var(--ease-default);
}

.nav-resume:hover {
  background: var(--color-accent-hover);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
}

/* Mobile nav */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  margin: 5px 0;
  transition: all var(--duration-normal) var(--ease-default);
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.98);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  font-family: var(--font-mono);
  font-size: var(--text-md);
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--color-accent);
}

@media (max-width: 768px) {
  .nav-links, .nav-resume { display: none; }
  .hamburger { display: block; }
  .header-inner { padding: 0 var(--gutter-mobile); }
}

@media (max-width: 1024px) and (min-width: 769px) {
  .header-inner { padding: 0 var(--gutter-tablet); }
  .nav-links { gap: var(--space-5); }
}

/* --- Buttons --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  background: var(--color-accent);
  padding: 16px 32px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background var(--duration-fast) var(--ease-default),
              transform var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-primary);
  background: transparent;
  padding: 16px 32px;
  border: 1px solid var(--color-border);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-default);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-tertiary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: none;
  padding: 0;
  transition: color var(--duration-fast) var(--ease-default);
}

.btn-tertiary .arrow {
  transition: transform var(--duration-fast) var(--ease-default);
}

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

.btn-tertiary:hover .arrow {
  transform: translateX(4px);
}

/* --- Cards --- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-default);
}

.card:hover {
  border-color: var(--color-accent-border);
  background: var(--color-bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card--chamfer {
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.card--featured {
  border-color: var(--color-accent-border);
  padding: var(--space-10);
  position: relative;
  background: linear-gradient(135deg, var(--color-accent-dim), transparent 60%), var(--color-bg-card);
}

.card--featured .badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border: 1px solid var(--color-accent-border);
  padding: 4px 10px;
}

/* Image card */
.card-image {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: all var(--duration-normal) var(--ease-default);
}

.card-image:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-accent-border);
}

.card-image .card-img {
  height: 200px;
  overflow: hidden;
  position: relative;
}

.card-image .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(40%) contrast(1.05);
  transition: filter var(--duration-slow) var(--ease-default),
              transform var(--duration-slow) var(--ease-default);
}

.card-image:hover .card-img img {
  filter: grayscale(0%) contrast(1.1);
  transform: scale(1.05);
}

.card-image .card-img::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(to top, var(--color-bg-card), transparent);
}

.card-image .card-body {
  padding: var(--space-6);
}

/* Impact card */
.impact-card {
  background: var(--color-bg-primary);
  padding: var(--space-8);
  position: relative;
  text-align: center;
}

.impact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-default);
}

.impact-card:hover::before {
  transform: scaleX(1);
}

.impact-card .number {
  font-family: var(--font-mono);
  font-weight: var(--weight-bold);
  font-size: clamp(36px, 4vw, 56px);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-3);
}

.impact-card .label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.impact-card .desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

/* Skill cluster card */
.skill-cluster {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-default);
}

.skill-cluster::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--color-accent);
  transition: height var(--duration-normal) var(--ease-default);
}

.skill-cluster:hover::before {
  height: 100%;
}

.skill-cluster:hover {
  border-color: var(--color-accent-border);
}

/* --- Tags --- */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-default);
}

.tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  padding: var(--space-6) 0;
}

.breadcrumbs a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--color-text-primary);
}

.breadcrumbs .sep {
  margin: 0 var(--space-2);
  color: var(--color-text-muted);
}

.breadcrumbs .current {
  color: var(--color-accent);
}

/* --- Accordion --- */
.accordion-item {
  border: 1px solid var(--color-border);
  margin-bottom: -1px;
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  background: var(--color-bg-card);
  border: none;
  color: var(--color-text-primary);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-default);
}

.accordion-header:hover {
  background: var(--color-bg-card-hover);
}

.accordion-header .chevron {
  transition: transform var(--duration-normal) var(--ease-default);
  color: var(--color-text-muted);
}

.accordion-header[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) var(--ease-default);
  background: var(--color-bg-primary);
}

.accordion-body-inner {
  padding: var(--space-6);
}

/* --- Forms --- */
.form-group {
  position: relative;
  margin-bottom: var(--space-6);
}

.form-input {
  width: 100%;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-family: var(--font-display);
  font-size: var(--text-base);
  padding: 14px 16px;
  transition: border-color var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
}

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

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

textarea.form-input {
  min-height: 150px;
  resize: vertical;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-12);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-brand .footer-logo {
  font-family: var(--font-mono);
  font-weight: var(--weight-bold);
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.footer-brand .tagline {
  font-style: italic;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav a {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--color-text-primary);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-default);
}

.footer-social a:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
  color: var(--color-accent);
}

.footer-bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.footer-bottom .copyright {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer-bottom .status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding: 0 var(--gutter-mobile);
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    padding-left: var(--gutter-mobile);
    padding-right: var(--gutter-mobile);
  }
}

/* --- Page nav (prev/next) --- */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-16);
}

.page-nav a {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--duration-fast) var(--ease-default);
}

.page-nav a:hover {
  color: var(--color-accent);
}

/* --- Gallery grid --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.gallery-grid img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  filter: grayscale(40%) contrast(1.05);
  cursor: pointer;
  transition: filter var(--duration-slow) var(--ease-default),
              transform var(--duration-normal) var(--ease-default);
}

.gallery-grid img:hover {
  filter: grayscale(0%) contrast(1.1);
  transform: scale(1.02);
}

@media (max-width: 1024px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .gallery-grid { grid-template-columns: 1fr; }
}

/* --- Lightbox --- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 10000;
  align-items: center;
  justify-content: center;
}

.lightbox.open {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  background: none;
  border: none;
  color: white;
  font-size: 32px;
  cursor: pointer;
}