/* ===========================================================
   Flip Image — styles
   All classes are namespaced with "flip-" and scoped under
   #flip-app so they won't clash with your website's theme.
   =========================================================== */

:root {
  --flip-bg-1: #0a1020;
  --flip-bg-2: #121a36;
  --flip-bg-3: #070b18;
  --flip-glass: rgba(255, 255, 255, 0.055);
  --flip-glass-2: rgba(255, 255, 255, 0.09);
  --flip-border: rgba(255, 255, 255, 0.12);
  --flip-text: #eaf2ff;
  --flip-muted: #9fb2d0;
  --flip-dim: #6f82a0;
  --flip-sky: #0ea5e9;
  --flip-indigo: #6366f1;
  --flip-grad: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  --flip-radius: 16px;
  --flip-shadow: 0 22px 50px -22px rgba(0, 0, 0, 0.65);
  --flip-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --flip-display: 'Space Grotesk', var(--flip-font);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; width: 100%; }

body {
  font-family: var(--flip-font);
  color: var(--flip-text);
  overflow: hidden; /* full-screen app — internal sections scroll instead */
  background:
    radial-gradient(1150px 780px at 84% -10%, rgba(14, 165, 233, 0.20), transparent 60%),
    radial-gradient(950px 720px at -6% 112%, rgba(99, 102, 241, 0.22), transparent 55%),
    linear-gradient(160deg, var(--flip-bg-1), var(--flip-bg-2) 52%, var(--flip-bg-3));
  background-attachment: fixed;
}

/* Full-screen app shell */
#flip-app {
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  max-width: 1640px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hidden { display: none !important; }

/* ---------- Header ---------- */
.flip-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; flex-shrink: 0; }
.flip-brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.flip-logo { flex-shrink: 0; width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; background: var(--flip-grad); color: #fff; box-shadow: 0 12px 24px -10px rgba(14, 165, 233, 0.7); }
.flip-logo svg { width: 24px; height: 24px; }
.flip-brand-text { min-width: 0; }
.flip-brand-text h1 { margin: 0; font-family: var(--flip-display); font-size: clamp(18px, 2.4vw, 25px); font-weight: 700; line-height: 1.1; }
.flip-brand-text p { margin: 3px 0 0; color: var(--flip-muted); font-size: 13px; }
.flip-header-actions { display: flex; gap: 10px; flex-wrap: wrap; flex-shrink: 0; }

/* ---------- Buttons ---------- */
.flip-btn {
  font-family: inherit; font-size: 14px; font-weight: 600; color: var(--flip-text);
  background: var(--flip-glass); border: 1px solid var(--flip-border); border-radius: 12px;
  padding: 10px 16px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease, filter 0.2s ease, border-color 0.2s ease;
  -webkit-tap-highlight-color: transparent; white-space: nowrap;
}
.flip-btn:hover { background: var(--flip-glass-2); transform: translateY(-1px); }
.flip-btn:active { transform: translateY(0); }
.flip-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.flip-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.flip-btn-primary { background: var(--flip-grad); border-color: transparent; color: #fff; box-shadow: 0 12px 26px -12px rgba(14, 165, 233, 0.8); }
.flip-btn-primary:hover { filter: brightness(1.08); background: var(--flip-grad); }
.flip-btn-ghost { background: transparent; }
.flip-btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 10px; }
.flip-btn-block { width: 100%; }
.flip-btn:focus-visible { outline: 2px solid var(--flip-indigo); outline-offset: 2px; }
.flip-btn.active { background: var(--flip-grad); border-color: transparent; color: #fff; }

/* ---------- Main layout ---------- */
.flip-main { flex: 1 1 auto; min-height: 0; display: flex; gap: 14px; }

/* Sidebar */
.flip-sidebar { width: 300px; flex-shrink: 0; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; padding-right: 4px; }
.flip-sidebar::-webkit-scrollbar { width: 9px; }
.flip-sidebar::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.15); border-radius: 10px; }

.flip-panel { background: var(--flip-glass); border: 1px solid var(--flip-border); border-radius: var(--flip-radius); padding: 13px 15px; display: flex; flex-direction: column; gap: 11px; }
.flip-panel-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--flip-dim); font-weight: 700; }

/* Flip action grid (2x2) */
.flip-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.flip-action {
  font-family: inherit; font-size: 12.5px; font-weight: 600; color: var(--flip-text);
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--flip-border); border-radius: 12px;
  padding: 13px 8px; cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 7px;
  transition: background 0.18s, border-color 0.18s, transform 0.15s, color 0.18s;
}
.flip-action svg { width: 24px; height: 24px; }
.flip-action:hover { background: var(--flip-glass-2); transform: translateY(-1px); border-color: rgba(99, 102, 241, 0.5); }
.flip-action.active { background: var(--flip-grad); border-color: transparent; color: #fff; box-shadow: 0 10px 22px -12px rgba(99, 102, 241, 0.9); }

/* Fields */
.flip-field { display: flex; flex-direction: column; gap: 6px; }
.flip-field > label { font-size: 11.5px; color: var(--flip-muted); font-weight: 600; }
.flip-field > label span { color: var(--flip-indigo); }
.flip-field select { font-family: inherit; font-size: 14px; color: var(--flip-text); background: rgba(0, 0, 0, 0.28); border: 1px solid var(--flip-border); border-radius: 10px; padding: 9px 10px; outline: none; cursor: pointer; }
.flip-field select:focus { border-color: var(--flip-indigo); }
.flip-field select option { color: #111; }
.flip-field input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 6px; background: rgba(255, 255, 255, 0.16); outline: none; margin: 9px 0 2px; }
.flip-field input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--flip-indigo); border: 2px solid #fff; cursor: pointer; box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4); }
.flip-field input[type="range"]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--flip-indigo); border: 2px solid #fff; cursor: pointer; }
.flip-bg-row { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.flip-bg-row input[type="color"] { width: 40px; height: 34px; padding: 2px; border: 1px solid var(--flip-border); border-radius: 8px; background: transparent; cursor: pointer; }
.flip-color-hex { font-size: 12px; color: var(--flip-muted); font-family: monospace; }
.flip-check { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--flip-text); cursor: pointer; font-weight: 500; }
.flip-check input { width: 16px; height: 16px; accent-color: var(--flip-indigo); cursor: pointer; }

/* ---------- Stage ---------- */
.flip-stage { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 12px; }
.flip-stage-toolbar { flex-shrink: 0; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.flip-info { font-size: 13px; color: var(--flip-muted); flex: 1 1 200px; }
.flip-info b { color: var(--flip-text); }
.flip-info .flip-now { color: var(--flip-indigo); font-weight: 600; }
.flip-info .flip-tx { color: var(--flip-sky); font-size: 12px; }

.flip-stage-wrap {
  flex: 1 1 auto; min-height: 0; position: relative; border-radius: var(--flip-radius); overflow: hidden; border: 1px solid var(--flip-border);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.045) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.045) 75%),
    linear-gradient(45deg, rgba(255, 255, 255, 0.045) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.045) 75%);
  background-size: 24px 24px; background-position: 0 0, 12px 12px; background-color: #0b1120;
  transition: box-shadow 0.2s, border-color 0.2s;
}
#flip-app.flip-dragging .flip-stage-wrap { border-color: var(--flip-sky); box-shadow: inset 0 0 0 3px rgba(14, 165, 233, 0.25); }

.flip-single, .flip-compare { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; padding: 20px; }

/* Single preview with 3D flip animation */
.flip-single { perspective: 1300px; }
#flip-canvas { max-width: 100%; max-height: 100%; display: block; border-radius: 6px; box-shadow: var(--flip-shadow); transform-style: preserve-3d; }
@keyframes flip-anim-h { 0% { transform: rotateY(0deg); } 50% { transform: rotateY(90deg); } 100% { transform: rotateY(0deg); } }
@keyframes flip-anim-v { 0% { transform: rotateX(0deg); } 50% { transform: rotateX(90deg); } 100% { transform: rotateX(0deg); } }
.flip-anim-h { animation: flip-anim-h 0.45s ease; }
.flip-anim-v { animation: flip-anim-v 0.45s ease; }

/* Compare mode */
.flip-pane { flex: 1 1 0; min-width: 0; min-height: 0; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.flip-pane canvas { max-width: 100%; max-height: 100%; border-radius: 6px; box-shadow: var(--flip-shadow); }
.flip-pane-label { font-size: 11px; color: var(--flip-muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }
.flip-divider { color: var(--flip-dim); font-size: 26px; font-weight: 700; flex-shrink: 0; align-self: center; }

/* Empty state */
.flip-empty { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 8px; padding: 24px; color: var(--flip-muted); }
.flip-empty-art { font-size: 52px; }
.flip-empty h2 { color: var(--flip-text); font-family: var(--flip-display); margin: 12px 0 4px; font-size: 20px; }
.flip-empty p { max-width: 460px; margin: 0; font-size: 14px; line-height: 1.5; }
.flip-features { list-style: none; margin: 18px 0 0; padding: 0; display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.flip-features li { font-size: 12.5px; color: var(--flip-muted); background: var(--flip-glass); border: 1px solid var(--flip-border); padding: 6px 12px; border-radius: 999px; }

/* Filmstrip */
.flip-filmstrip { flex-shrink: 0; display: flex; gap: 8px; overflow-x: auto; max-width: 100%; padding: 2px; min-height: 4px; }
.flip-filmstrip::-webkit-scrollbar { height: 6px; }
.flip-filmstrip::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.15); border-radius: 6px; }
.flip-thumb { position: relative; width: 60px; height: 60px; flex-shrink: 0; border-radius: 9px; overflow: hidden; cursor: pointer; border: 2px solid transparent; background: #000; transition: border-color 0.15s, transform 0.15s; }
.flip-thumb:hover { transform: translateY(-2px); }
.flip-thumb.active { border-color: var(--flip-indigo); box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.3); }
.flip-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.flip-thumb-badge { position: absolute; bottom: 2px; left: 2px; font-size: 11px; font-weight: 700; color: #fff; background: rgba(99, 102, 241, 0.92); padding: 1px 5px; border-radius: 5px; }
.flip-thumb-remove { position: absolute; top: 2px; right: 2px; width: 18px; height: 18px; border-radius: 50%; background: rgba(0, 0, 0, 0.65); color: #fff; border: none; font-size: 14px; line-height: 1; cursor: pointer; display: grid; place-items: center; padding: 0; }
.flip-thumb-remove:hover { background: rgba(239, 68, 68, 0.9); }

/* ---------- Footer ---------- */
.flip-footer { flex-shrink: 0; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-size: 12px; color: var(--flip-dim); padding: 0 4px; }

/* ---------- Toast ---------- */
.flip-toast { position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(24px); background: rgba(18, 26, 54, 0.96); border: 1px solid var(--flip-border); color: var(--flip-text); padding: 12px 18px; border-radius: 12px; font-size: 14px; font-weight: 500; opacity: 0; pointer-events: none; transition: opacity 0.3s ease, transform 0.3s ease; z-index: 1100; box-shadow: var(--flip-shadow); max-width: 92vw; text-align: center; }
.flip-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.flip-toast.error { border-color: rgba(239, 68, 68, 0.6); }
.flip-toast.success { border-color: rgba(16, 185, 129, 0.6); }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .flip-main { flex-direction: column; }
  .flip-sidebar { width: 100%; max-height: 40vh; }
  .flip-grid { grid-template-columns: repeat(4, 1fr); }
  .flip-stage { min-height: 360px; }
}
@media (max-width: 560px) {
  #flip-app { padding: 12px; gap: 10px; }
  .flip-grid { grid-template-columns: 1fr 1fr; }
  .flip-brand-text p { display: none; }
  .flip-divider { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}