/* ─── Design Tokens ──────────────────────────────────────────────── */
:root {
  --c-bg:         #0A0B0F;
  --c-surface-01: #0F1016;
  --c-surface-02: #14151A;
  --c-surface-03: #1A1B25;
  --c-border:     #2A2B35;
  --c-border-dim: rgba(255,255,255,0.055);
  --c-text-muted: #6B7280;
  --c-white:      #FFFFFF;
  --c-ice:        #E4E4E7;
  --c-orange:     #F26522;
  --c-neon:       #FF7029;

  --radius-bento: 1.5rem;
  --radius-card:  1.125rem;

  --shadow-card:       0 1px 0 rgba(255,255,255,0.04), inset 0 0 0 1px rgba(255,255,255,0.05);
  --shadow-card-hover: 0 20px 60px rgba(0,0,0,0.55), 0 1px 0 rgba(255,255,255,0.06);
  --shadow-orange-sm:  0 0 22px rgba(242,101,34,0.3);
  --shadow-orange:     0 0 50px rgba(242,101,34,0.2), 0 0 100px rgba(242,101,34,0.08);
  --shadow-hero-btn:   0 8px 32px rgba(242,101,34,0.35), 0 2px 8px rgba(0,0,0,0.4);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overscroll-behavior: none;
}

body {
  background-color: var(--c-bg);
  color: var(--c-white);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-weight: 400;
  line-height: 1.65;
  min-height: 100dvh;
  overflow-x: hidden;
  position: relative;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Clash Display', system-ui, sans-serif;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

img, video { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
p { line-height: 1.75; }
a { color: inherit; text-decoration: none; }

/* ─── Accessibility ──────────────────────────────────────────────── */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

::selection { background: rgba(242,101,34,0.25); color: #fff; }

:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ─── Background layers ──────────────────────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
  z-index: 0;
}

.ambient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.ambient-orb--top {
  top: -25%;
  right: -20%;
  width: 70vw;
  height: 65vh;
  background: radial-gradient(ellipse at center, rgba(242,101,34,0.06) 0%, transparent 65%);
  animation: drift-top 55s ease-in-out infinite;
}

.ambient-orb--bottom {
  bottom: -30%;
  left: -10%;
  width: 55vw;
  height: 55vh;
  background: radial-gradient(ellipse at center, rgba(242,101,34,0.03) 0%, transparent 65%);
  animation: drift-bottom 70s ease-in-out infinite;
}

@keyframes drift-top {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(-4%, 3%) scale(1.04); }
  66%       { transform: translate(3%, -2%) scale(0.97); }
}

@keyframes drift-bottom {
  0%, 100% { transform: translate(0, 0) scale(1); }
  40%       { transform: translate(5%, -4%) scale(1.05); }
  75%       { transform: translate(-3%, 2%) scale(0.96); }
}

/* ─── App Shell ──────────────────────────────────────────────────── */
.app-shell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* ─── Header ─────────────────────────────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 1.375rem;
  padding-top: calc(0.9375rem + env(safe-area-inset-top));
  padding-bottom: 0.9375rem;
  /* Apple systemBackground — same color as iOS nav bars in light mode */
  background: #F2F2F7;
  /* Hairline separator — Apple standard */
  border-bottom: 1px solid rgba(0, 0, 0, 0.12);
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-logo {
  height: 26px;
  width: auto;
  flex-shrink: 0;
}

.app-header-spacer { flex: 1; }

.app-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 6px rgba(34, 197, 94, 0.5);
  animation: status-pulse 2.5s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px rgba(34,197,94,0.5); }
  50%       { opacity: 0.55; box-shadow: 0 0 3px rgba(34,197,94,0.25); }
}

/* ─── Text gradient (hero heading) ──────────────────────────────── */
.text-orange-gradient {
  background: linear-gradient(135deg, #F26522 0%, #FF7029 50%, #F26522 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50%       { background-position: 100% 50%; }
}

/* ─── State machine ──────────────────────────────────────────────── */
.state         { display: none; flex: 1; flex-direction: column; }
.state.active  { display: flex; }

/* ─── Empty State Hero ───────────────────────────────────────────── */
#state-empty.active {
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  padding: 2rem 1.5rem;
  padding-bottom: calc(2rem + env(safe-area-inset-bottom));
}

/* Preview mockup */
.hero-preview {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  animation: float 5s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.preview-frame {
  position: relative;
  width: min(300px, 80vw);
  aspect-ratio: 16 / 9;
  border-radius: 0.875rem;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.08),
    0 24px 64px rgba(0,0,0,0.6),
    0 0 40px rgba(242,101,34,0.08);
}

/* Simulated "user photo" background */
.preview-photo-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 30% 40%, #2a3a4a 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 70% 60%, #1e2835 0%, transparent 50%),
    linear-gradient(160deg, #1a2332 0%, #0e1520 40%, #0a1018 100%);
}

/* Actual WTC overlay applied on top */
.preview-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: bottom center;
}

/* Animated scan line */
.preview-scan-line {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(242,101,34,0.06) 50%,
    transparent 100%
  );
  background-size: 100% 40%;
  animation: scan 3s ease-in-out infinite;
}

@keyframes scan {
  0%   { background-position: 0 -40%; }
  100% { background-position: 0 140%; }
}

/* Corner brackets */
.preview-corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--c-orange);
  border-style: solid;
  opacity: 0.6;
}
.preview-corner--tl { top: 8px; left: 8px;  border-width: 2px 0 0 2px; border-radius: 2px 0 0 0; }
.preview-corner--tr { top: 8px; right: 8px; border-width: 2px 2px 0 0; border-radius: 0 2px 0 0; }
.preview-corner--bl { bottom: 8px; left: 8px;  border-width: 0 0 2px 2px; border-radius: 0 0 0 2px; }
.preview-corner--br { bottom: 8px; right: 8px; border-width: 0 2px 2px 0; border-radius: 0 0 2px 0; }

/* "Frame WTC Services" badge */
.preview-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  background: rgba(242,101,34,0.1);
  border: 1px solid rgba(242,101,34,0.2);
  border-radius: 100px;
  font-size: 0.6875rem;
  font-weight: 500;
  color: rgba(242,101,34,0.9);
  letter-spacing: 0.04em;
  backdrop-filter: blur(8px);
}

.preview-badge-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-orange);
  animation: status-pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

/* Hero text */
.hero-text {
  text-align: center;
  max-width: 360px;
}

.hero-heading {
  font-size: clamp(1.875rem, 6vw, 2.75rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 0.875rem;
}

.hero-sub {
  font-size: 0.875rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 280px;
  margin: 0 auto;
}

/* CTA area */
.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

/* Hero primary button */
.btn-hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.9375rem 2.25rem;
  min-height: 54px;
  background: var(--c-orange);
  color: #fff;
  border-radius: 0.5rem;
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.15s;
  box-shadow: var(--shadow-hero-btn);
  border: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  animation: btn-breathe 3s ease-in-out infinite;
}

@keyframes btn-breathe {
  0%, 100% { box-shadow: var(--shadow-hero-btn); }
  50%       { box-shadow: 0 12px 40px rgba(242,101,34,0.45), 0 2px 8px rgba(0,0,0,0.4); }
}

.btn-hero:hover {
  background: var(--c-neon);
  transform: translateY(-1px);
  box-shadow: 0 12px 40px rgba(242,101,34,0.45), 0 2px 12px rgba(0,0,0,0.5);
}

.btn-hero:active { transform: scale(0.97); }

/* Feature pills */
.feature-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3125rem 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: 100px;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--c-text-muted);
  background: rgba(255,255,255,0.02);
  letter-spacing: 0.02em;
}

.pill svg { opacity: 0.6; flex-shrink: 0; }

/* ─── Processing State ───────────────────────────────────────────── */
#state-processing.active {
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
  text-align: center;
  padding: 2rem;
}

.loader-wrap {
  position: relative;
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.loader-ring {
  position: absolute;
  border-radius: 50%;
  border-style: solid;
  border-color: transparent;
}

.loader-ring--outer {
  width: 100px;
  height: 100px;
  border-width: 1.5px;
  border-top-color: rgba(242,101,34,0.3);
  border-right-color: rgba(242,101,34,0.1);
  animation: spin 2.5s linear infinite;
}

.loader-ring--mid {
  width: 76px;
  height: 76px;
  border-width: 2px;
  border-top-color: rgba(242,101,34,0.6);
  border-left-color: rgba(242,101,34,0.15);
  animation: spin-reverse 1.6s linear infinite;
}

.loader-ring--inner {
  width: 54px;
  height: 54px;
  border-width: 2.5px;
  border-top-color: var(--c-orange);
  border-right-color: rgba(242,101,34,0.2);
  animation: spin 1s linear infinite;
}

@keyframes spin         { to { transform: rotate(360deg); } }
@keyframes spin-reverse { to { transform: rotate(-360deg); } }

.loader-core {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-surface-02);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-orange);
  animation: core-pulse 1.6s ease-in-out infinite;
  position: relative;
  z-index: 1;
}

@keyframes core-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(242,101,34,0); }
  50%       { box-shadow: 0 0 0 6px rgba(242,101,34,0.08); }
}

.processing-label {
  font-family: 'Clash Display', system-ui, sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.processing-count {
  font-size: 0.8125rem;
  color: var(--c-text-muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

/* ─── Results: toolbar ───────────────────────────────────────────── */
#state-results.active {
  overflow: hidden;
}

.results-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.125rem;
  border-bottom: 1px solid var(--c-border-dim);
  flex-shrink: 0;
}

.results-toolbar-left {
  flex: 1;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}

.results-count-badge {
  font-family: 'Clash Display', system-ui, sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.results-label {
  font-size: 0.75rem;
  color: var(--c-text-muted);
}

/* ─── Photo Grid ─────────────────────────────────────────────────── */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.625rem;
  padding: 0.75rem 0.75rem calc(7rem + env(safe-area-inset-bottom));
  overflow-y: auto;
  flex: 1;
  align-content: start;
}

/* ─── Photo Card ─────────────────────────────────────────────────── */
.photo-card {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--c-surface-02);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.2s;
  animation: card-enter 0.35s cubic-bezier(0.34,1.56,0.64,1) both;
  cursor: pointer;
}

@keyframes card-enter {
  from { opacity: 0; transform: scale(0.88) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.photo-card:hover { transform: scale(1.02); box-shadow: var(--shadow-card-hover); }
.photo-card:active { transform: scale(0.98); }

/* Full-bleed image */
.photo-card-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.photo-card:hover .photo-card-img { transform: scale(1.04); }

/* Gradient overlay with action buttons */
.photo-card-actions {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem 0.625rem 0.625rem;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.75) 0%,
    rgba(0,0,0,0.3) 60%,
    transparent 100%
  );
  display: flex;
  gap: 0.375rem;
  justify-content: flex-end;
  opacity: 0;
  transition: opacity 0.2s;
}

/* Always show on touch devices */
@media (hover: none) { .photo-card-actions { opacity: 1; } }
.photo-card:hover .photo-card-actions { opacity: 1; }

/* Icon-style card buttons */
.card-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.375rem 0.625rem;
  border-radius: 0.375rem;
  border: none;
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 500;
  font-size: 0.625rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
  min-height: 32px;
}

.card-btn:active { transform: scale(0.94); }

.card-btn-save {
  background: var(--c-orange);
  color: #fff;
}
.card-btn-save:hover { background: var(--c-neon); }

.card-btn-share {
  background: rgba(255,255,255,0.15);
  color: var(--c-white);
  backdrop-filter: blur(4px);
}
.card-btn-share:hover { background: rgba(255,255,255,0.25); }

/* WTC badge on card */
.photo-card-badge {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.45rem;
  background: rgba(10,11,15,0.7);
  border: 1px solid rgba(242,101,34,0.3);
  border-radius: 4px;
  font-size: 0.5625rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(242,101,34,0.9);
  backdrop-filter: blur(6px);
}

/* ─── Buttons (generic) ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5625rem 1.125rem;
  min-height: 40px;
  border-radius: 0.375rem;
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s, transform 0.1s;
  cursor: pointer;
  white-space: nowrap;
  border: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  text-decoration: none;
}

.btn:active { transform: scale(0.96); }

.btn-primary {
  background: var(--c-orange);
  color: #fff;
}
.btn-primary:hover {
  background: var(--c-neon);
  box-shadow: var(--shadow-orange-sm);
}

.btn-ghost {
  background: transparent;
  color: rgba(228,228,231,0.55);
  border: 1px solid var(--c-border);
}
.btn-ghost:hover {
  color: var(--c-white);
  border-color: rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
}

.btn-outline-subtle {
  background: transparent;
  color: var(--c-ice);
  border: 1px solid var(--c-border);
}
.btn-outline-subtle:hover {
  border-color: rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.05);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  min-height: 34px;
  font-size: 0.625rem;
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* ─── Bottom Bar ─────────────────────────────────────────────────── */
.bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.875rem 1rem;
  padding-bottom: calc(0.875rem + env(safe-area-inset-bottom));
  display: none;
  align-items: center;
  gap: 0.625rem;
  z-index: 20;
  /* Gradient fade from transparent to dark */
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(10,11,15,0.85) 25%,
    rgba(10,11,15,0.97) 100%
  );
  padding-top: 1.5rem;
}

.bottom-bar.visible { display: flex; }

.btn-save-all {
  flex: 1;
  min-height: 46px;
  font-size: 0.75rem;
  box-shadow: var(--shadow-orange-sm);
}

/* ─── Install Banner ─────────────────────────────────────────────── */
.install-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0.875rem 1rem;
  padding-bottom: calc(0.875rem + env(safe-area-inset-bottom));
  background: rgba(20, 21, 26, 0.96);
  border-top: 1px solid rgba(242,101,34,0.2);
  backdrop-filter: blur(20px);
  animation: slide-up 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes slide-up {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.install-banner-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: 480px;
  margin: 0 auto;
}

.install-banner-icon {
  width: 36px;
  height: 36px;
  border-radius: 0.5rem;
  background: rgba(242,101,34,0.1);
  border: 1px solid rgba(242,101,34,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-orange);
  flex-shrink: 0;
}

.install-banner-text {
  flex: 1;
  font-size: 0.8125rem;
  color: var(--c-ice);
  line-height: 1.5;
}

.install-banner-text strong { color: var(--c-white); }

.icon-share {
  display: inline-block;
  width: 13px;
  height: 13px;
  vertical-align: middle;
  margin: 0 1px;
  color: var(--c-orange);
}

.install-banner-close {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: var(--c-text-muted);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.install-banner-close:hover { background: rgba(255,255,255,0.12); color: var(--c-white); }

/* ─── Reset button ───────────────────────────────────────────────── */
.btn-reset:hover {
  color: #f87171;
  border-color: rgba(248,113,113,0.25);
  background: rgba(248,113,113,0.05);
}

/* ─── Lightbox ───────────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox[hidden] { display: none; }

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.lightbox-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 4.5rem;
  max-width: 100vw;
  max-height: 100dvh;
}

.lightbox-img {
  max-width: 100%;
  max-height: calc(100dvh - 8rem);
  object-fit: contain;
  border-radius: 0.625rem;
  box-shadow: 0 24px 80px rgba(0,0,0,0.8);
  display: block;
  animation: lb-enter 0.2s ease-out;
}

@keyframes lb-enter {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

.lightbox-close {
  position: absolute;
  top: calc(1rem + env(safe-area-inset-top));
  right: 1rem;
  z-index: 2;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.12);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
  backdrop-filter: blur(4px);
  flex-shrink: 0;
}

.lightbox-close:hover { background: rgba(255,255,255,0.2); }

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.12);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
  backdrop-filter: blur(4px);
}

.lightbox-nav:hover { background: rgba(255,255,255,0.2); }
.lightbox-nav[hidden] { display: none; }
.lightbox-nav--prev { left: 0.75rem; }
.lightbox-nav--next { right: 0.75rem; }

.lightbox-counter {
  position: absolute;
  bottom: calc(1rem + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-size: 0.6875rem;
  color: rgba(255,255,255,0.4);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* ─── Scrollbar ──────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #1e1f28; border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-border); }

/* ─── Reduced Motion ─────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ─── Tablet / Desktop ───────────────────────────────────────────── */
@media (min-width: 540px) {
  #state-empty.active { gap: 3rem; padding: 3rem 2rem; }

  .preview-frame { width: min(380px, 80vw); }

  .hero-heading { font-size: clamp(2.25rem, 5vw, 3rem); }

  .hero-sub { max-width: 340px; }
}

@media (min-width: 768px) {
  #state-empty.active {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 4rem;
    padding: 2rem 4rem;
  }

  .hero-preview { order: 2; }
  .hero-text    { text-align: left; order: 1; }
  .hero-cta     { align-items: flex-start; order: 1; }

  /* Combine text + cta on left side */
  #state-empty .hero-text,
  #state-empty .hero-cta { max-width: 380px; }

  .photo-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
    padding: 1.25rem 1.5rem calc(7rem + env(safe-area-inset-bottom));
  }

  .bottom-bar { max-width: 600px; left: 50%; transform: translateX(-50%); border-radius: 1rem 1rem 0 0; }
}

@media (min-width: 1024px) {
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
  .results-toolbar { padding: 1rem 1.75rem; }
}