@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600&family=Space+Grotesk:wght@400;500;600&display=swap");

@layer reset, tokens, base, layout, component, responsive;

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

@layer tokens {
  /* ── Mode sombre (défaut) ── */
  :root {
    color-scheme: dark;

    --bg:           #1e2130;
    --bg-alt:       #252838;
    --shadow-light: #2a2f45;
    --shadow-dark:  #13161f;
    --primary:      #818cf8;
    --primary-dark: #6366f1;
    --primary-glow: rgba(129, 140, 248, 0.22);
    --text-dark:    #e2e5f0;
    --text-muted:   #8b90a8;
    --text-light:   #555b78;
    --track-fill:   var(--primary);
    --track-empty:  var(--bg);
    --seg-active-bg: linear-gradient(145deg, #2d3248, #1a1d2e);
    --anchor-active-bg: linear-gradient(145deg, #2c2f52, #1e2040);
    --preview-wrap-bg: linear-gradient(145deg, #181b28, #252838);
    --info-border:  rgba(255,255,255,0.05);
    --row-border:   rgba(255,255,255,0.05);

    --neu-out:    6px 6px 14px var(--shadow-dark), -6px -6px 14px var(--shadow-light);
    --neu-out-sm: 4px 4px 8px var(--shadow-dark),  -4px -4px 8px var(--shadow-light);
    --neu-in:     inset 4px 4px 10px var(--shadow-dark), inset -4px -4px 10px var(--shadow-light);
    --neu-in-sm:  inset 2px 2px 6px var(--shadow-dark),  inset -2px -2px 6px var(--shadow-light);

    --font-display: "Space Grotesk", sans-serif;
    --font-body:    "Outfit", sans-serif;
    --radius:    16px;
    --radius-sm: 10px;
    --radius-xs: 8px;
  }

  /* ── Mode clair ── */
  :root[data-theme="light"] {
    color-scheme: light;

    --bg:           #e0e5ec;
    --bg-alt:       #e8ecf3;
    --shadow-light: #ffffff;
    --shadow-dark:  #a3b1c6;
    --primary:      #6366f1;
    --primary-dark: #4f52d1;
    --primary-glow: rgba(99, 102, 241, 0.18);
    --text-dark:    #374151;
    --text-muted:   #6b7280;
    --text-light:   #9ca3af;
    --track-fill:   var(--primary);
    --track-empty:  var(--bg);
    --seg-active-bg: linear-gradient(145deg, #f0f5fc, #d8dde6);
    --anchor-active-bg: linear-gradient(145deg, #d8dcf5, #c8ccee);
    --preview-wrap-bg: linear-gradient(145deg, #d8dde6, #eaeef5);
    --info-border:  rgba(163, 177, 198, 0.3);
    --row-border:   rgba(163, 177, 198, 0.25);
  }
}

@layer base {
  body {
    background: var(--bg);
    color: var(--text-dark);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-block-size: 100dvh;
    overflow-x: clip;
    transition: background 0.3s ease, color 0.3s ease;
  }
}

@layer layout {
  .wrapper {
    margin-inline: auto;
    max-inline-size: min(100% - 2.5rem, 52rem);
    padding: 2.5rem 0 5rem;
  }

  header {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    margin-block-end: 2rem;
    padding: 1.25rem 1.75rem;
    border-radius: var(--radius);
    box-shadow: var(--neu-out);
    background: var(--bg);
  }

  header h1 {
    display: flex;
    align-items: center;
    gap: 0.4em;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--primary), #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  header h1 svg {
    /* SVG uses currentColor; reset text-fill so it's not transparent */
    color: var(--primary);
    -webkit-text-fill-color: initial;
    flex-shrink: 0;
  }

  header span {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    flex: 1;
  }

  .intro {
    background: var(--bg);
    box-shadow: var(--neu-in-sm);
    border-radius: var(--radius);
    font-size: 0.6875rem;
    line-height: 1.75;
    margin-block-end: 1.5rem;
    padding: 1.25rem 1.5rem;
  }

  .intro p {
    color: var(--text-muted);
    margin-block-end: 0.625rem;
  }

  .intro-note {
    color: var(--text-light);
    font-size: 0.625rem;
    letter-spacing: 0.03em;
    margin-block-end: 0 !important;
  }
}

@layer component {

  /* ── Drop Zone ── */
  #drop_zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding-block: 2.5rem;
    margin-block-end: 1.5rem;
    border-radius: var(--radius);
    background: var(--bg);
    box-shadow: var(--neu-in);
    cursor: pointer;
    text-align: center;
    transition: box-shadow 0.2s ease;
    border: none;
    outline: none;
  }

  #drop_zone.is-over {
    box-shadow:
      inset 4px 4px 10px var(--shadow-dark),
      inset -4px -4px 10px var(--shadow-light),
      0 0 0 2px var(--primary),
      0 0 24px var(--primary-glow);
  }

  #drop_zone label {
    color: var(--primary);
    cursor: pointer;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
    font-weight: 500;
  }

  #drop_zone input[type="file"] { display: none; }

  .drop-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-block-end: 0.5rem;
    padding: 1rem;
    border-radius: 50%;
    box-shadow: var(--neu-out-sm);
    background: var(--bg);
    transition: box-shadow 0.2s;
  }

  #drop_zone:hover .drop-icon,
  #drop_zone:focus-visible .drop-icon {
    box-shadow: var(--neu-in-sm);
  }

  .drop-hint {
    color: var(--text-light);
    font-size: 0.6875rem;
    letter-spacing: 0.04em;
  }

  /* ── Controls Panel ── */
  #controls {
    background: var(--bg);
    box-shadow: var(--neu-out);
    border-radius: var(--radius);
    margin-block-end: 1.5rem;
    padding: 0.25rem 0;
    overflow: hidden;
  }

  .control-row {
    display: grid;
    grid-template-columns: 7.5rem minmax(0, 1fr);
    gap: 1rem;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-block-end: 1px solid var(--row-border);
    transition: background 0.15s;
  }

  .control-row:last-child { border-block-end: none; }

  .control-label {
    color: var(--text-muted);
    font-size: 0.625rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
  }

  .control-row.align-start { align-items: start; }
  .control-row.align-start .control-label { padding-block-start: 0.4rem; }

  /* ── Segment Groups ── */
  .seg-group {
    display: inline-flex;
    flex-wrap: nowrap;
    border-radius: var(--radius-xs);
    box-shadow: var(--neu-in-sm);
    background: var(--bg);
    padding: 3px;
    gap: 2px;
    max-inline-size: 100%;
    overflow: hidden;
  }

  .seg-group button {
    -webkit-appearance: none;
    appearance: none;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.625rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.4rem 0.75rem;
    border-radius: calc(var(--radius-xs) - 3px);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    flex-shrink: 1;
    min-inline-size: 0;
    box-shadow: none;
  }

  .seg-group button:where(:hover, :focus-visible):not(.is-active) {
    color: var(--text-dark);
    background: rgba(255,255,255,0.06);
  }

  .seg-group button:focus { outline: none; }
  .seg-group button:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; }

  .seg-group button.is-active {
    background: var(--seg-active-bg);
    box-shadow: var(--neu-out-sm);
    color: var(--primary);
    font-weight: 600;
    cursor: default;
    pointer-events: none;
  }

  /* ── Anchor Grid ── */
  #anchor_grid {
    display: grid;
    grid-template-columns: repeat(3, 1.5rem);
    gap: 4px;
    padding: 6px;
    border-radius: var(--radius-xs);
    box-shadow: var(--neu-in-sm);
    background: var(--bg);
    width: fit-content;
  }

  .anchor-btn {
    -webkit-appearance: none;
    appearance: none;
    border: none;
    block-size: 1.5rem;
    inline-size: 1.5rem;
    border-radius: 5px;
    background: var(--bg);
    box-shadow: var(--neu-out-sm);
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
    padding: 0;
  }

  .anchor-btn::after {
    content: "";
    position: absolute;
    inset-block-start: 50%;
    inset-inline-start: 50%;
    transform: translate(-50%, -50%);
    block-size: 4px;
    inline-size: 4px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: background 0.15s;
  }

  .anchor-btn.is-active {
    background: var(--anchor-active-bg);
    box-shadow: var(--neu-in-sm);
    cursor: default;
    pointer-events: none;
  }

  .anchor-btn.is-active::after {
    background: var(--primary);
    block-size: 6px;
    inline-size: 6px;
    box-shadow: 0 0 6px var(--primary-glow);
  }

  .anchor-btn:where(:hover, :focus-visible):not(.is-active) {
    box-shadow: var(--neu-in-sm);
  }

  .anchor-btn:focus { outline: none; }
  .anchor-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; }

  /* ── Range Slider ── */
  #row_quality.is-hidden { display: none; }

  .slider-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    inline-size: 100%;
  }

  input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    inline-size: 100%;
    cursor: pointer;
    flex: 1;
  }

  /* Track — webkit: use background gradient to show fill */
  input[type="range"]::-webkit-slider-runnable-track {
    height: 8px;
    border-radius: 4px;
    background:
      linear-gradient(
        to right,
        var(--primary) 0%,
        var(--primary) var(--slider-pct, 90%),
        transparent var(--slider-pct, 90%),
        transparent 100%
      ),
      var(--bg);
    box-shadow: var(--neu-in-sm);
  }

  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--shadow-light), var(--bg));
    box-shadow: 4px 4px 8px var(--shadow-dark), -3px -3px 7px var(--shadow-light);
    cursor: pointer;
    margin-top: -7px;
    transition: box-shadow 0.2s;
  }

  input[type="range"]::-webkit-slider-thumb:hover {
    box-shadow:
      3px 3px 6px var(--shadow-dark),
      -3px -3px 6px var(--shadow-light),
      0 0 0 3px var(--primary-glow);
  }

  /* Firefox */
  input[type="range"]::-moz-range-track {
    height: 8px;
    border-radius: 4px;
    background: var(--bg);
    box-shadow: var(--neu-in-sm);
  }

  input[type="range"]::-moz-range-progress {
    height: 8px;
    border-radius: 4px 0 0 4px;
    background: var(--primary);
  }

  input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--shadow-light), var(--bg));
    box-shadow: 4px 4px 8px var(--shadow-dark), -3px -3px 7px var(--shadow-light);
    cursor: pointer;
  }

  /* ── Text/Number Inputs ── */
  .input-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .input-unit {
    color: var(--text-muted);
    font-size: 0.6875rem;
  }

  input[type="number"],
  input[type="text"] {
    background: var(--bg);
    border: none;
    box-shadow: var(--neu-in-sm);
    color: var(--text-dark);
    font-family: var(--font-body);
    font-size: 0.8125rem;
    inline-size: 6.5rem;
    outline: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-xs);
    transition: box-shadow 0.2s;
  }

  input[type="number"]:focus,
  input[type="text"]:focus {
    box-shadow:
      var(--neu-in-sm),
      0 0 0 2px var(--primary-glow);
  }

  input[type="number"]::-webkit-inner-spin-button,
  input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }

  .custom-ratio-inputs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .custom-ratio-inputs input[type="number"] {
    inline-size: 4.5rem;
    text-align: center;
  }

  /* ── Hints & Previews ── */
  #format_hint {
    color: var(--text-light);
    font-size: 0.625rem;
    letter-spacing: 0.03em;
    margin-block-start: 0.5rem;
    max-inline-size: 28rem;
    line-height: 1.6;
  }

  #naming_preview {
    color: var(--primary);
    font-size: 0.6875rem;
    font-weight: 500;
    margin-block-start: 0.5rem;
    letter-spacing: 0.01em;
  }

  /* ── Preview Grid ── */
  #preview_grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
    margin-block-end: 1.5rem;
  }

  .preview-card:hover { box-shadow: var(--neu-out-sm); }

  .preview-canvas-wrap {
    background: var(--preview-wrap-bg);
    overflow: hidden;
  }

  .preview-canvas-wrap img {
    block-size: 100%;
    display: block;
    inline-size: 100%;
    object-fit: cover;
  }

  .preview-info {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    justify-content: space-between;
    padding: 0.375rem 0.375rem 0.375rem 0.625rem;
    border-block-start: 1px solid var(--info-border);
  }

  .preview-info-text { min-inline-size: 0; }
  .preview-info-actions { display: flex; flex-shrink: 0; }

  .preview-name {
    font-size: 0.6875rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-dark);
  }

  .preview-dims {
    color: var(--text-light);
    font-size: 0.5625rem;
    letter-spacing: 0.04em;
    margin-block-start: 0.1rem;
  }

  .preview-remove,
  .preview-download {
    -webkit-appearance: none;
    appearance: none;
    display: flex;
    align-items: center;
    justify-content: center;
    block-size: 1.75rem;
    inline-size: 1.75rem;
    border: none;
    background: var(--bg);
    border-radius: 50%;
    box-shadow: var(--neu-out-sm);
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
    transition: all 0.2s ease;
  }

  .preview-remove:hover  { box-shadow: var(--neu-in-sm); color: #f87171; }
  .preview-download:hover { box-shadow: var(--neu-in-sm); color: var(--primary); }
  .preview-drag {
    -webkit-appearance: none;
    appearance: none;
    display: flex;
    align-items: center;
    justify-content: center;
    block-size: 1.75rem;
    inline-size: 1.75rem;
    border: none;
    background: transparent;
    box-shadow: none;
    color: var(--text-light);
    cursor: grab;
    padding: 0;
    flex-shrink: 0;
    transition: color 0.2s ease;
    border-radius: 50%;
  }

  .preview-drag:hover { color: var(--text-muted); box-shadow: none; }
  .preview-drag:active { cursor: grabbing; }

  .preview-card {
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--neu-out);
    background: var(--bg);
    transition: box-shadow 0.2s, opacity 0.2s, transform 0.15s;
    cursor: default;
  }

  .preview-card.is-dragging {
    opacity: 0.45;
    transform: scale(0.97);
    box-shadow: var(--neu-in-sm);
  }

  .preview-card.drop-target {
    box-shadow:
      var(--neu-out),
      0 0 0 2px var(--primary),
      0 0 16px var(--primary-glow);
  }

  /* size summary */
  #size_summary {
    color: var(--text-light);
    font-size: 0.6rem;
    letter-spacing: 0.04em;
    flex: 0;
    white-space: nowrap;
  }

  /* cancel button */
  #btn_cancel {
    background: transparent;
    box-shadow: none;
    color: var(--text-muted);
    border: 1px solid var(--row-border);
    padding: 0.4rem 0.9rem;
  }
  #btn_cancel:hover { box-shadow: none; color: #f87171; border-color: #f87171; background: transparent; }

  /* ── Action Bar ── */
  #action_bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: flex-end;
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    background: var(--bg);
    box-shadow: var(--neu-out);
  }

  #status_bar {
    color: var(--text-muted);
    flex: 1;
    font-size: 0.6875rem;
    letter-spacing: 0.03em;
    min-block-size: 1.2em;
  }

  /* ── Buttons ── */
  button {
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg);
    border: none;
    border-radius: var(--radius-sm);
    box-shadow: var(--neu-out-sm);
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.625rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    padding: 0.5rem 1.25rem;
    text-transform: uppercase;
    transition: all 0.2s ease;
  }

  button:focus { outline: none; }

  button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }

  button:where(:hover, :focus-visible):not(:disabled) {
    box-shadow: var(--neu-in-sm);
    color: var(--text-dark);
  }

  button:active:not(:disabled) { box-shadow: var(--neu-in-sm); }

  /* ── Theme Toggle ── */
  #theme_toggle {
    margin-inline-start: auto;
    background: var(--bg);
    border: none;
    border-radius: 50%;
    box-shadow: var(--neu-out-sm);
    color: var(--primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    inline-size: 2.25rem;
    block-size: 2.25rem;
    padding: 0;
    flex-shrink: 0;
    transition: all 0.2s ease;
    text-transform: none;
    font-size: 1rem;
    letter-spacing: 0;
  }

  #theme_toggle:where(:hover, :focus-visible) {
    box-shadow: var(--neu-in-sm);
    color: var(--primary);
    opacity: 0.8;
  }

  button:disabled {
    cursor: not-allowed;
    opacity: 0.35;
  }

  #btn_export:not(:disabled) {
    background: linear-gradient(145deg, #7577f5, #5355e0);
    box-shadow:
      4px 4px 12px rgba(83, 85, 224, 0.45),
      -2px -2px 6px var(--shadow-light);
    color: #fff;
    font-weight: 600;
    letter-spacing: 0.08em;
  }

  #btn_export:where(:hover, :focus-visible):not(:disabled) {
    background: linear-gradient(145deg, #6567e8, #4446cc);
    box-shadow:
      2px 2px 8px rgba(83, 85, 224, 0.5),
      -1px -1px 4px var(--shadow-light),
      inset 1px 1px 3px rgba(255,255,255,0.12);
    color: #fff;
  }

  /* ── Responsive ── */
  @media (width <= 36em) {
    .wrapper {
      max-inline-size: 100%;
      padding-inline: 0.875rem;
    }

    .control-row {
      grid-template-columns: 1fr;
      gap: 0.4rem;
      padding-block: 0.625rem;
    }

    .control-label { padding-block-start: 0; }

    .seg-group button { padding: 0.375rem 0.5rem; }
  }
}