/* Instagram-style Mobile Wedding Invitation */

:root {
  --ig-bg: #fafafa;
  --ig-surface: #ffffff;
  --ig-text: #262626;
  --ig-text-secondary: #8e8e8e;
  --ig-border: #dbdbdb;
  --ig-link: #0095f6;
  --ig-like: #ed4956;
  --ig-gradient: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --font-script: "Pacifico", cursive;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --header-h: 44px;
  --tabbar-h: 50px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--ig-bg);
  color: var(--ig-text);
  font-size: 14px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 430px;
  margin: 0 auto;
  background: var(--ig-bg);
  min-height: 100dvh;
  padding-bottom: calc(var(--tabbar-h) + var(--safe-bottom) + 8px);
}

/* ── Header ── */
.ig-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: calc(var(--header-h) + var(--safe-top));
  padding: var(--safe-top) 16px 0;
  background: var(--ig-surface);
  border-bottom: 1px solid var(--ig-border);
}

.ig-logo {
  grid-column: 2;
  font-family: var(--font-script);
  font-size: 26px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;
  color: var(--ig-text);
}

.ig-header .ig-icon-btn {
  grid-column: 3;
  justify-self: end;
}

.ig-icon-btn {
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  color: var(--ig-text);
  -webkit-tap-highlight-color: transparent;
}

/* ── Stories ── */
.stories {
  background: var(--ig-surface);
  border-bottom: 1px solid var(--ig-border);
  padding: 12px 0;
}

.stories-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding: 0 16px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.stories-track::-webkit-scrollbar {
  display: none;
}

.story {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  width: 72px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.story-ring {
  display: flex;
  padding: 2.5px;
  border-radius: 50%;
  background: var(--ig-gradient);
  transition: background 0.2s ease;
}

.story-ring.viewed,
.story.viewed > .story-ring,
.profile-avatar-wrap.viewed > .story-ring {
  background: #c7c7c7 !important;
  background-image: none !important;
}

.story-ring--lg {
  padding: 3px;
}

.story-thumb {
  display: block;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  overflow: hidden;
  border: 2.5px solid var(--ig-surface);
  background: #efefef;
}

.story-thumb--lg {
  width: 86px;
  height: 86px;
}

.story-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.story-thumb.empty {
  background: linear-gradient(135deg, #efefef, #dbdbdb);
}

.story-label {
  font-size: 11px;
  color: var(--ig-text);
  max-width: 72px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Profile ── */
.profile {
  background: var(--ig-surface);
  padding: 16px;
  border-bottom: 1px solid var(--ig-border);
}

.profile-top {
  display: flex;
  align-items: center;
  gap: 28px;
}

.profile-avatar-wrap--clickable {
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.profile-stats {
  flex: 1;
  display: flex;
  justify-content: space-around;
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 16px;
  font-weight: 600;
}

.stat span {
  font-size: 12px;
  color: var(--ig-text-secondary);
}

.profile-info {
  margin-top: 12px;
}

.profile-name {
  font-size: 14px;
  font-weight: 600;
}

.profile-bio {
  margin-top: 2px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ig-text);
}

.profile-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.btn-follow,
.btn-message {
  flex: 1;
  text-align: center;
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

.btn-follow {
  background: var(--ig-link);
  color: #fff;
}

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

.profile-highlights {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  overflow-x: auto;
  scrollbar-width: none;
}

.profile-highlights::-webkit-scrollbar {
  display: none;
}

.highlight {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--ig-text);
  font-size: 12px;
  flex-shrink: 0;
}

.highlight-ring {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 1px solid var(--ig-border);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ig-bg);
}

.highlight-icon {
  font-size: 24px;
}

/* ── Posts ── */
.post {
  background: var(--ig-surface);
  border-bottom: 1px solid var(--ig-border);
  margin-bottom: 8px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.post.visible {
  opacity: 1;
  transform: translateY(0);
}

.post-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
}

.post-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.post-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  overflow: hidden;
  background: #efefef;
  flex-shrink: 0;
}

.post-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.post-username {
  display: block;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
}

.post-location {
  display: block;
  font-size: 12px;
  color: var(--ig-text-secondary);
  line-height: 1.2;
}

.post-media {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: #efefef;
  overflow: hidden;
}

.post-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.post-media--map {
  aspect-ratio: auto;
}

.post-media--map.post-media--clickable {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.post-media--map img {
  height: auto;
  object-fit: contain;
}

.post-media.is-empty .map-empty {
  display: flex;
}

.post-media.is-empty img {
  display: none;
}

.map-empty {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  color: var(--ig-text-secondary);
  font-size: 13px;
}

.post-media--text {
  aspect-ratio: 1;
  padding: 32px 24px;
  background-color: #262626;
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.42), rgba(0, 0, 0, 0.42)),
    url('images/background/invitation.jpg');
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
  font-size: 15px;
  line-height: 1.8;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.post-signature {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 13px;
  line-height: 1.8;
  opacity: 0.92;
}

.post-signature span {
  display: block;
}

.post-media--card {
  aspect-ratio: auto;
  padding: 24px 20px;
  background: var(--ig-bg);
}

.post-media--gift {
  padding: 20px 16px;
}

.card-title {
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.card-footer {
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  color: var(--ig-text-secondary);
}

.card-countdown {
  text-align: center;
  margin-top: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ig-link);
  font-variant-numeric: tabular-nums;
}

/* ── Calendar ── */
.calendar-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--ig-text-secondary);
  margin-bottom: 6px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  border-radius: 50%;
}

.calendar-day.empty { visibility: hidden; }
.calendar-day.sunday { color: var(--ig-like); }
.calendar-day.saturday { color: var(--ig-link); }

.calendar-day.wedding-day {
  background: var(--ig-gradient);
  color: #fff;
  font-weight: 600;
}

/* ── Profile Grid ── */
.profile-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.grid-item {
  position: relative;
  aspect-ratio: 1;
  background: #efefef;
  overflow: hidden;
  margin: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.grid-item.empty span {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ig-text-secondary);
  font-size: 13px;
  background: #efefef;
}

.grid-item.empty img {
  display: none;
}

.grid-item--placeholder span {
  font-size: 24px;
  color: var(--ig-border);
}

/* ── Gallery Viewer ── */
.gallery-viewer {
  position: fixed;
  inset: 0;
  z-index: 210;
  background: #000;
  display: flex;
  flex-direction: column;
  touch-action: none;
  overscroll-behavior: none;
  transition: transform 0.2s ease, opacity 0.2s ease;
  will-change: transform, opacity;
}

.gallery-viewer[hidden] {
  display: none;
}

body.gallery-open {
  touch-action: none;
  overscroll-behavior: none;
}

.gallery-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(12px + var(--safe-top)) 16px 8px;
  color: #fff;
  z-index: 2;
}

.gallery-counter {
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.gallery-close {
  background: none;
  border: none;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  padding: 8px;
}

.gallery-stage {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.gallery-track {
  display: flex;
  height: 100%;
  transition: transform 0.28s ease;
  will-change: transform;
}

.gallery-track.is-dragging {
  transition: none;
}

.gallery-slide {
  flex: 0 0 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.gallery-slide img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
  touch-action: none;
}

/* ── Post Actions ── */
.post-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px 0;
}

.post-actions-left {
  display: flex;
  gap: 14px;
}

.ig-action {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--ig-text);
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.15s ease;
}

.ig-action:active {
  transform: scale(0.9);
}

.like-btn.liked .icon-heart {
  fill: var(--ig-like);
  stroke: var(--ig-like);
  animation: heartPop 0.3s ease;
}

@keyframes heartPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.25); }
  100% { transform: scale(1); }
}

.post-likes,
.post-caption,
.post-time {
  padding: 0 12px;
}

.post-likes {
  margin-top: 6px;
  font-size: 14px;
}

.post-caption {
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.5;
}

.post-body {
  padding: 8px 12px 0;
}

.post-body .post-caption {
  padding: 0;
}

.link-row {
  display: flex;
  gap: 16px;
  margin-top: 8px;
  padding: 0 12px 8px;
}

.link-row--location {
  flex-wrap: nowrap;
  align-items: center;
  gap: 8px;
  padding: 0;
  margin-top: 10px;
}

.location-actions {
  margin-top: 10px;
}

.location-actions .link-row--location {
  margin-top: 0;
}

.link-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 8px;
  background: var(--ig-bg);
  border: 1px solid var(--ig-border);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  color: var(--ig-text);
  white-space: nowrap;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.link-chip--transport.is-active {
  border-color: var(--ig-link);
  color: var(--ig-link);
}

.map-icon {
  display: inline-flex;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  overflow: hidden;
}

.map-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.transport-body {
  width: 100%;
  padding-top: 10px;
  font-size: 13px;
  color: var(--ig-text-secondary);
}

.transport-body[hidden] {
  display: none;
}

.link-action {
  color: var(--ig-link);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.transport {
  padding: 0 12px 8px;
  font-size: 13px;
  color: var(--ig-text-secondary);
}

.transport summary {
  color: var(--ig-link);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  padding: 4px 0;
}

.transport summary::-webkit-details-marker {
  display: none;
}

.transport p,
.transport-body p {
  margin-top: 8px;
  line-height: 1.6;
}

.transport strong,
.transport-body strong {
  color: var(--ig-text);
}

.transport-section {
  margin-top: 14px;
}

.transport-body .transport-section:first-child {
  margin-top: 8px;
}

.transport-section:first-of-type {
  margin-top: 8px;
}

.transport-steps {
  margin-top: 6px;
  padding-left: 18px;
  line-height: 1.6;
}

.transport-steps li {
  margin-top: 4px;
}

.transport-note {
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
}

.post-time {
  margin-top: 4px;
  margin-bottom: 12px;
  font-size: 10px;
  color: var(--ig-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ── Gift / Account ── */
.gift-desc {
  text-align: center;
  font-size: 13px;
  color: var(--ig-text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.account-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.account-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ig-surface);
  border: 1px solid var(--ig-border);
  border-radius: 8px;
}

.account-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--ig-link);
  white-space: nowrap;
}

.account-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.account-bank {
  display: block;
  font-size: 12px;
  color: var(--ig-text-secondary);
}

.account-number {
  display: block;
  font-size: 16px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.account-holder {
  display: block;
  font-size: 12px;
  color: var(--ig-text-secondary);
}

.btn-copy {
  padding: 7px 14px;
  border: none;
  border-radius: 8px;
  background: var(--ig-link);
  color: #fff;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}

.btn-copy:active {
  opacity: 0.8;
}

/* ── Footer ── */
.ig-footer {
  text-align: center;
  padding: 24px 16px;
  font-size: 12px;
  color: var(--ig-text-secondary);
}

/* ── Tab Bar ── */
.tabbar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: calc(var(--tabbar-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: var(--ig-surface);
  border-top: 1px solid var(--ig-border);
  z-index: 100;
}

.tabbar-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  color: var(--ig-text);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.tabbar-item.active {
  color: var(--ig-text);
}

.tabbar-add svg {
  stroke-width: 1.5;
}

.tabbar-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--ig-border);
  background: #efefef;
}

.tabbar-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ── Story Viewer ── */
.story-viewer {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: #000;
  display: flex;
  flex-direction: column;
  touch-action: none;
  overscroll-behavior: none;
  transition: transform 0.2s ease, opacity 0.2s ease;
  will-change: transform, opacity;
}

.story-viewer[hidden] {
  display: none;
}

body.story-open {
  touch-action: none;
  overscroll-behavior: none;
}

.story-viewer-bars {
  position: relative;
  z-index: 3;
  flex-shrink: 0;
  display: flex;
  gap: 4px;
  padding: calc(10px + var(--safe-top)) 10px 6px;
}

.story-bar {
  flex: 1;
  height: 3px;
  background: rgba(255, 255, 255, 0.35);
  border-radius: 2px;
  overflow: hidden;
}

.story-bar-fill {
  display: block;
  width: 0;
  height: 100%;
  background: #fff;
  border-radius: 2px;
  transition: none;
}

.story-close {
  position: absolute;
  top: calc(12px + var(--safe-top));
  right: 12px;
  background: none;
  border: none;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  z-index: 4;
  padding: 8px;
}

.story-viewer-content {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: 0;
  touch-action: none;
}

.story-viewer-content img,
.story-image {
  flex: 1;
  width: 100%;
  min-height: 0;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  border-radius: 0;
  touch-action: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
  pointer-events: none;
}

.story-viewer-content p {
  flex-shrink: 0;
  color: #fff;
  margin: 0;
  padding: 10px 16px calc(12px + var(--safe-bottom));
  font-size: 14px;
  text-align: center;
  user-select: none;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: calc(var(--tabbar-h) + var(--safe-bottom) + 16px);
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: rgba(38, 38, 38, 0.92);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 300;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .post {
    opacity: 1;
    transform: none;
  }
}