/* ========================================
   Jasur Osimi — Portfolio
   Design System: Based on Jakub Zeg
   ======================================== */

@font-face {
  font-family: "Inter";
  src: url("/fonts/Inter-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* --- Custom Properties (#19) --- */
:root {
  --color-text: rgb(0, 0, 0);
  --color-bg: #FFFFFF;
  --color-surface: #F6F6F6;
  --color-surface-dark: #F5F5F5;
  --color-border: rgba(0, 0, 0, 0.06);
  --color-white: rgb(255, 255, 255);

  --font-body: 'Inter', 'Inter Display', sans-serif;
  --font-size-sm: 12px;
  --font-size-base: 16px;
  --font-size-lg: 28px;
  --font-size-xl: 44px;
  --font-size-display: 32px;

  --ls-tight: -0.4px;
  --ls-base: 0.7px;
  --ls-small: 0.4px;

  --lh-base: 24px;
  --lh-small: 18px;

  --gap: 8px;
  --radius: 10px;
  --radius-sm: 6px;

  --ease-spring: cubic-bezier(0.22, 1, 0.36, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth; /* #16 */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-feature-settings: 'cv11' 1, 'ss01' 1;
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

body.info-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible {
  outline: 2px solid #000;
  outline-offset: 2px;
}

img, video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 12px;
  left: 12px;
  right: 12px;
  z-index: 10;
  display: flex;
  align-items: center;
  mix-blend-mode: difference;
  color: var(--color-white);
  font-size: var(--font-size-base);
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
  padding: 0;
  pointer-events: none;
}

.nav a,
.nav button {
  pointer-events: auto;
  cursor: pointer;
}

.nav-button {
  appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  padding: 0;
}

.nav-left,
.nav-center,
.nav-right {
  flex: 1;
  display: flex;
  align-items: center;
}

.nav-center {
  justify-content: center;
  gap: 10px;
}

.nav-right {
  justify-content: flex-end;
  gap: 10px;
}

.nav-left {
  gap: var(--gap);
}

.nav-back {
  display: none;
  font-size: 18px;
}

.nav-back.visible {
  display: inline;
}

.nav-link {
  transition: opacity 0.2s ease;
}

.nav-link:hover {
  opacity: 0.6;
}

/* --- Main Content --- */
.main {
  padding: 40px var(--gap) 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
}

/* --- Pages (#1 — transitions) --- */
.page {
  opacity: 0;
  visibility: hidden;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  transition: opacity 0.3s var(--ease-spring), visibility 0.3s;
}

.page.active {
  opacity: 1;
  visibility: visible;
  position: relative;
}

.page.leaving {
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

/* --- Loading Skeleton (#6) --- */
.masonry-skeleton {
  display: grid;
  grid-template-columns: repeat(var(--masonry-columns, 3), minmax(0, 1fr));
  gap: var(--gap);
  width: 100%;
}

.masonry-skeleton-col {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.skeleton-card {
  border-radius: var(--radius);
  background: var(--color-surface);
  animation: skeleton-pulse 1.2s ease-in-out infinite;
}

@keyframes skeleton-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.3; }
}

/* --- Masonry (Responsive CSS Grid) --- */
.masonry {
  --masonry-columns: 3;
  --masonry-row-unit: 1px;
  display: grid;
  grid-template-columns: repeat(var(--masonry-columns), minmax(0, 1fr));
  grid-auto-rows: var(--masonry-row-unit);
  grid-auto-flow: row dense;
  column-gap: var(--gap);
  row-gap: 0;
  width: 100%;
  align-items: start;
}

.masonry.masonry--uniform-two {
  --masonry-columns: 2;
  grid-auto-rows: auto;
  grid-auto-flow: row;
}

.masonry.masonry--uniform-two .card {
  grid-column-end: span 1;
}

.masonry > .empty-state {
  grid-column: 1 / -1;
}

/* --- Cards --- */
.card {
  border-radius: var(--radius);
  background: transparent;
  overflow: hidden;
  position: relative;
  width: 100%;
  min-width: 0;
  cursor: pointer;
  transition: transform 0.44s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  opacity: 1;
  grid-column-end: span var(--card-col-span, 1);
}

.card:focus-visible {
  outline: 2px solid #000;
  outline-offset: -2px;
}

/* #15 — will-change only on hover */
.card:hover {
  will-change: transform;
}

.card.appeared {
  opacity: 1;
  transition: transform 0.44s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s var(--ease-spring);
}

.card.locked {
  cursor: not-allowed;
}

/* #17 — card-media positioning in CSS instead of JS */
.card-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.card-media img,
.card-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Padded fit mode */
.card--padded { background: var(--color-surface); }
.card--padded .card-media { display: flex; align-items: center; justify-content: center; padding: var(--card-padding, 20%); }
.card--padded .card-media img,
.card--padded .card-media video { width: auto; height: auto; max-width: 100%; max-height: 100%; object-fit: contain; }

/* Placeholder card when no media */
.card-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
}

.card-placeholder-text {
  font-size: var(--font-size-sm);
  letter-spacing: var(--ls-small);
  line-height: var(--lh-small);
  color: var(--color-text);
  opacity: 0.3;
}

/* #18 — media error fallback */
.card-media-error {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
}

.card-media-error span {
  font-size: var(--font-size-sm);
  letter-spacing: var(--ls-small);
  line-height: var(--lh-small);
  color: var(--color-text);
  opacity: 0.25;
}

/* --- Card Hover Tags --- */
.card-tags {
  position: absolute;
  bottom: 10px;
  left: 10px;
  right: 10px;
  display: flex;
  flex-wrap: nowrap;
  gap: 4px;
  overflow: hidden;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
  z-index: 2;
}

.card.card--has-incoming .card-tags {
  right: 124px; /* reserve space only when incoming label exists */
}

.card:hover .card-tags {
  opacity: 1;
  transform: translateY(0);
}

.card:focus-visible .card-tags {
  opacity: 1;
  transform: translateY(0);
}

.tag-pill {
  background: var(--color-white);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: var(--font-size-sm);
  font-weight: 400;
  letter-spacing: var(--ls-small);
  line-height: var(--lh-small);
  flex: 0 0 auto;
  white-space: nowrap;
}

/* --- Footer (#5 — spacing fix) --- */
.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 48px var(--gap) 24px;
  font-size: var(--font-size-base);
  font-weight: 400;
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
}

.footer.hidden {
  display: none;
}

.footer-link {
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.footer-link:hover {
  opacity: 1;
}

.footer-email {
  appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  padding: 0;
  cursor: pointer;
  position: relative;
}

/* --- Bottom Bar --- */
.bottom-bar {
  display: flex;
  justify-content: flex-start;
  gap: 16px;
  align-items: center;
  padding: 100px 12px 12px;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
}

.bottom-link {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--color-text);
  font: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  padding: 0;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.bottom-link:hover {
  opacity: 0.5;
}

/* --- Info Overlay (backdrop blur) --- */
.info-overlay {
  position: fixed;
  inset: 0;
  z-index: 8;
  background: rgba(0, 0, 0, 0.1);
  -webkit-backdrop-filter: blur(0px);
  backdrop-filter: blur(0px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.4s ease, visibility 0.4s, backdrop-filter 0.4s ease, -webkit-backdrop-filter 0.4s ease;
}

.info-overlay.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

/* --- Info Modal (#3 — animated) --- */
.info-modal {
  position: fixed;
  top: 48px;
  right: var(--gap);
  z-index: 9;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  width: 819px;
  max-width: calc(100vw - 16px);
  box-shadow: 0 0 0 1px var(--color-border);
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px) scale(0.98);
  transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
}

.info-modal.active {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.info-title {
  font-size: var(--font-size-base);
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
  margin-bottom: 16px;
}

.info-bio {
  font-size: var(--font-size-base);
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
  margin-bottom: 24px;
  max-width: 560px;
}

.info-modal.info-modal--compact .info-bio {
  margin-bottom: 0;
}

.info-history {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.info-row {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 16px;
  font-size: var(--font-size-base);
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
}

/* --- Case Study --- */
.case-study {
  max-width: 1256px;
  margin: 0 auto;
  width: 100%;
}

.case-whitespace {
  height: 260px;
}

.case-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
  font-size: var(--font-size-sm);
  font-weight: 400;
  letter-spacing: var(--ls-small);
  line-height: var(--lh-small);
}

.case-meta-left,
.case-meta-right {
  display: flex;
  gap: 24px;
}

.case-hero {
  width: 100%;
  background: var(--color-surface-dark);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  margin-bottom: 48px;
}

.case-hero img {
  max-width: 60%;
  height: auto;
  object-fit: contain;
}

.case-content {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
  margin-bottom: 48px;
}

.case-headline {
  grid-column: 1 / 7;
  font-size: var(--font-size-xl);
  font-weight: 400;
  letter-spacing: var(--ls-tight);
  line-height: 1.07;
}

.case-body {
  grid-column: 8 / 12;
  font-size: var(--font-size-base);
  font-weight: 400;
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
}

.case-body p + p {
  margin-top: 16px;
}

.case-media {
  width: 100%;
  margin-bottom: 24px;
}

.case-media img,
.case-media video {
  width: 100%;
  border-radius: 0;
}

.case-phone-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
  margin-bottom: 24px;
}

.case-phone-row img {
  width: 100%;
  border-radius: var(--radius);
}

.case-quote {
  grid-column: 7 / 12;
  margin-bottom: 48px;
}

.case-quote blockquote {
  font-size: var(--font-size-base);
  font-weight: 400;
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
  margin-bottom: 8px;
}

.case-quote cite {
  font-size: var(--font-size-sm);
  font-weight: 400;
  letter-spacing: var(--ls-small);
  line-height: var(--lh-small);
  font-style: normal;
}

.case-section-heading {
  font-size: var(--font-size-lg);
  font-weight: 400;
  letter-spacing: var(--ls-tight);
  line-height: 1.07;
  padding-bottom: var(--gap);
  border-bottom: 1px solid var(--color-text);
  margin-bottom: 24px;
}

.case-deliverables {
  font-size: var(--font-size-base);
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
  list-style: none;
  margin-bottom: 48px;
}

.case-deliverables li + li {
  margin-top: 4px;
}

/* --- Empty State --- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 120px 20px;
  width: 100%;
  text-align: center;
}

.empty-title {
  font-size: var(--font-size-display);
  letter-spacing: var(--ls-tight);
  line-height: 1.07;
  margin-bottom: 12px;
}

.empty-body {
  font-size: var(--font-size-base);
  letter-spacing: var(--ls-base);
  line-height: var(--lh-base);
  opacity: 0.4;
  max-width: 400px;
}

/* --- Animations --- */
@keyframes spring-fade {
  0% { opacity: 0.001; }
  60% { opacity: 1.05; }
  80% { opacity: 0.98; }
  100% { opacity: 1; }
}

.card.appeared {
  animation: spring-fade 0.4s var(--ease-spring) forwards;
}

/* --- Responsive: Mobile --- */
@media (max-width: 1199.98px) {
  .masonry {
    --masonry-columns: 2;
  }

  .info-modal {
    width: calc(100vw - 16px);
    top: 48px;
    right: var(--gap);
  }

  .info-row {
    grid-template-columns: 60px 1fr 1fr;
    gap: var(--gap);
    font-size: 14px;
  }

  .case-headline {
    grid-column: 1 / -1;
    font-size: var(--font-size-display);
    margin-bottom: 16px;
  }

  .case-body {
    grid-column: 1 / -1;
  }

  .case-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .case-meta {
    flex-direction: column;
    gap: 4px;
  }

  .case-phone-row {
    grid-template-columns: 1fr;
    gap: var(--gap);
  }

  .case-whitespace {
    height: 120px;
  }
}

@media (max-width: 767.98px) {
  .masonry {
    --masonry-columns: 1;
  }

  .masonry.masonry--uniform-two {
    --masonry-columns: 1;
  }

  .card-tags {
    right: 10px;
  }

  .card-incoming {
    display: none;
  }
}

/* --- Arrange Mode (iOS-style drag-to-reorder) --- */
@keyframes arrange-wobble {
  0%   { transform: rotate(-1.2deg); }
  50%  { transform: rotate(1.2deg); }
  100% { transform: rotate(-1.2deg); }
}

.arrange-wobble {
  animation: arrange-wobble 0.35s ease-in-out infinite;
}

.arrange-mode .card {
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}

.arrange-mode .card:hover:not(.locked) {
  transform: none;
}

.arrange-mode .card:hover .card-tags {
  opacity: 0;
  transform: translateY(4px);
}

.arrange-mode .card:active {
  cursor: grabbing;
}

.arrange-ghost {
  position: fixed;
  z-index: 1000;
  opacity: 0.85;
  transform: scale(1.04);
  box-shadow: 0 20px 60px rgba(0,0,0,0.18), 0 4px 16px rgba(0,0,0,0.12);
  pointer-events: none;
  border-radius: var(--radius);
  overflow: hidden;
  transition: none;
  will-change: transform, left, top;
}

.arrange-toolbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding: 16px var(--gap) calc(16px + env(safe-area-inset-bottom, 0px));
  background: rgba(255,255,255,0.72);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  backdrop-filter: blur(20px) saturate(1.4);
  border-top: 1px solid var(--color-border);
  transform: translateY(100%);
  transition: transform 0.4s var(--ease-spring);
}

.arrange-toolbar.visible {
  transform: translateY(0);
}

.arrange-toolbar button {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: var(--ls-small);
  line-height: var(--lh-small);
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.arrange-toolbar button:active {
  transform: scale(0.96);
}

.arrange-toolbar .arrange-cancel {
  background: var(--color-surface);
  color: var(--color-text);
}

.arrange-toolbar .arrange-save {
  background: var(--color-text);
  color: var(--color-bg);
}

.arrange-toolbar button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── "case study incoming" label on cards ── */
.card-incoming {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: transparent;
  color: var(--color-white);
  mix-blend-mode: difference;
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: var(--font-size-sm);
  font-weight: 400;
  letter-spacing: var(--ls-small);
  line-height: var(--lh-small);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s ease;
  transition-delay: 0s;
  z-index: 3;
}

.card:hover .card-incoming {
  opacity: 1;
  transition-delay: 0.8s;
}

.card:focus-visible .card-incoming {
  opacity: 1;
  transition-delay: 0.8s;
}

.arrange-mode .card:hover .card-incoming {
  opacity: 0;
  transition-delay: 0s;
}

@media (hover: none) {
  .card-incoming {
    opacity: 1;
    transition-delay: 0s;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
  .arrange-wobble {
    animation: none;
  }
}