/* Shared UI: progress, back-to-top, nav, menu, buttons, chips, modals */

/* —— Scroll progress —— */
.zk-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  z-index: 120;
  background: var(--accent);
  width: 0%;
  transition: width 0.12s linear;
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.6);
}

/* —— Back to top —— */
.zk-back-top {
  position: fixed;
  right: clamp(18px, 4vw, 40px);
  bottom: clamp(18px, 4vw, 40px);
  z-index: 96;
  cursor: pointer;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 20px;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
  animation: zkfade 0.3s ease both;
  transition: transform 0.18s ease, box-shadow 0.3s ease;
}

.zk-back-top.is-visible {
  display: flex;
}

.zk-back-top:hover {
  box-shadow: 0 14px 38px rgba(59, 130, 246, 0.55);
}

/* —— Nav —— */
.zk-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 64px);
  backdrop-filter: blur(14px);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.4s ease, border-color 0.4s ease;
}

.zk-nav.is-scrolled {
  background: var(--nav-solid);
  border-bottom-color: var(--border);
}

.zk-nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: inherit;
}

.zk-nav-brand:hover {
  color: inherit;
}

.zk-nav-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
}

.zk-theme-toggle {
  margin-right: auto;
  margin-left: 16px;
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 62px;
  height: 32px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--chip-bg);
  border: 1px solid var(--border-mid);
  transition: border-color 0.25s ease, background 0.25s ease;
  color: inherit;
}

.zk-theme-toggle:hover {
  border-color: var(--accent);
}

.zk-theme-icon {
  font-size: 12px;
  line-height: 1;
  color: var(--text-mute);
}

.zk-theme-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  transform: translateX(0);
  transition: transform 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
}

[data-theme="light"] .zk-theme-knob {
  transform: translateX(0);
}

[data-theme="dark"] .zk-theme-knob {
  transform: translateX(30px);
}

.zk-nav-end {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
}

.zk-navlinks {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 34px);
}

.zk-nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 600;
  color: inherit;
  padding: 6px 2px;
  opacity: 0.72;
  transition: opacity 0.25s ease;
}

.zk-nav-link:hover {
  color: inherit;
  opacity: 1;
}

.zk-nav-link[aria-current="page"] {
  opacity: 1;
}

.zk-nav-link-bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.zk-nav-link[aria-current="page"] .zk-nav-link-bar {
  transform: scaleX(1);
}

.zk-burger {
  display: none;
  cursor: pointer;
  background: transparent;
  border: none;
  color: inherit;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.zk-burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}

.zk-burger span:last-child {
  width: 18px;
}

/* —— Buttons —— */
.zk-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  padding: 16px 30px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.3s ease, border-color 0.25s ease,
    background 0.25s ease;
  text-decoration: none;
}

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

.zk-btn--primary:hover {
  color: #fff;
  box-shadow: 0 14px 40px rgba(59, 130, 246, 0.45);
}

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

.zk-btn--ghost:hover {
  color: var(--text);
  border-color: var(--text);
  background: var(--chip-bg);
}

.zk-btn--nav {
  font-size: 14px;
  padding: 10px 18px;
  color: var(--inv-text);
  background: var(--inv-bg);
}

.zk-btn--nav:hover {
  color: var(--inv-text);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
}

.zk-btn--sm {
  font-size: 14px;
  padding: 11px 20px;
  gap: 8px;
  color: #fff;
  background: var(--accent);
}

.zk-btn--sm:hover {
  color: #fff;
  box-shadow: 0 10px 26px rgba(59, 130, 246, 0.4);
}

.zk-btn--submit {
  font-size: 16px;
  padding: 15px 26px;
  color: #fff;
  background: var(--accent);
  border: none;
  justify-content: center;
}

.zk-btn--submit:hover {
  box-shadow: 0 12px 34px rgba(59, 130, 246, 0.4);
}

.zk-btn--link {
  cursor: pointer;
  margin-top: 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  background: transparent;
  border: none;
  padding: 0;
}

.zk-btn--inv {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--inv-text);
  background: var(--inv-bg);
  padding: 13px 22px;
  border-radius: 999px;
  text-decoration: none;
}

.zk-btn--inv:hover {
  color: var(--inv-text);
}

.zk-btn--outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border-mid);
  padding: 13px 22px;
  border-radius: 999px;
  text-decoration: none;
}

.zk-btn--outline:hover {
  color: var(--text);
}

/* —— Chips —— */
.zk-chip {
  font-size: 12px;
  font-weight: 600;
  color: var(--chip-text);
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  padding: 5px 11px;
  border-radius: 7px;
}

.zk-chip--lg {
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 8px;
}

.zk-badge {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--success);
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  padding: 3px 9px;
  border-radius: 999px;
}

/* —— Mobile menu —— */
.zk-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 130;
  background: var(--overlay);
  backdrop-filter: blur(6px);
  flex-direction: column;
  padding: 24px clamp(20px, 6vw, 48px);
  animation: zkfade 0.3s ease both;
}

.zk-menu.is-open {
  display: flex;
}

.zk-menu-top {
  display: flex;
  justify-content: flex-end;
}

.zk-menu-close {
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 34px;
  line-height: 1;
  padding: 6px 12px;
}

.zk-menu-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.zk-menu-link {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 9vw, 56px);
  letter-spacing: -0.03em;
  color: var(--text);
  padding: 6px 0;
}

.zk-menu-link:hover {
  color: var(--text);
}

.zk-menu .zk-btn--primary {
  margin-top: 22px;
  align-self: flex-start;
  padding: 14px 26px;
  font-size: 17px;
}

/* —— Modals —— */
.zk-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 140;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vw, 48px);
  background: var(--scrim);
  backdrop-filter: blur(8px);
  animation: zkfade 0.25s ease both;
}

.zk-modal.is-open {
  display: flex;
}

.zk-modal--resume {
  z-index: 150;
  backdrop-filter: blur(10px);
}

.zk-modal-panel {
  position: relative;
  width: min(760px, 100%);
  max-height: 88vh;
  overflow: auto;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: clamp(24px, 4vw, 40px);
  animation: zkfade 0.28s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.zk-modal-panel--resume {
  width: min(860px, 100%);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

.zk-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  cursor: pointer;
  background: var(--chip-bg);
  border: 1px solid var(--chip-border);
  color: var(--chip-text);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 22px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.zk-modal-kicker {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 8px;
}

.zk-modal-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 38px);
  letter-spacing: -0.02em;
  margin: 0 0 4px;
  color: var(--text);
  padding-right: 48px;
}

.zk-modal-meta {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-mute);
  margin: 0 0 12px;
}

.zk-modal-summary {
  font-size: 17px;
  line-height: 1.5;
  color: var(--text-mute);
  margin: 0 0 22px;
  max-width: 60ch;
}

.zk-modal-shots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.zk-modal-shot {
  aspect-ratio: 16 / 10;
  border-radius: 12px;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  background-color: var(--surface-2);
  border: 1px solid var(--ph-border);
}

.zk-modal-body {
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dim);
  margin-bottom: 26px;
}

.zk-modal-body p {
  margin: 0 0 14px;
}

.zk-modal-body p:last-child {
  margin-bottom: 0;
}

.zk-modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 26px;
}

.zk-modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.zk-resume-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.zk-resume-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  margin: 0;
  color: var(--text);
}

.zk-resume-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.zk-resume-header .zk-modal-close {
  position: static;
}

.zk-resume-body {
  flex: 1;
  overflow: auto;
  background: var(--ph-b);
  min-height: 360px;
}

.zk-resume-body object {
  width: 100%;
  height: 60vh;
  border: none;
  display: block;
}

.zk-resume-fallback {
  height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  padding: 32px;
  color: var(--ph-text);
  font-family: ui-monospace, Menlo, monospace;
  font-size: 14px;
  background-image: repeating-linear-gradient(
    135deg,
    var(--ph-a) 0 14px,
    var(--ph-b) 14px 28px
  );
}

.zk-resume-fallback span:first-child {
  font-size: 30px;
}

.zk-resume-fallback span:last-child {
  max-width: 36ch;
  line-height: 1.5;
}

/* —— Icon mask helper —— */
.zk-icon {
  flex: 0 0 auto;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
}

/* —— Responsive nav —— */
@media (max-width: 760px) {
  .zk-navlinks {
    display: none !important;
  }

  .zk-burger {
    display: flex !important;
  }
}