* { margin: 0; padding: 0; box-sizing: border-box; }
:root { --primary:#5aaea6; --primary-dark:#378d84; --soft:#edf8f6; --ink:#17211f; --muted:#74807d; --bg:#f7faf8; --surface:#fff; --border:#e1e9e6; --danger:#c87578; --shadow:0 14px 35px rgba(35,62,58,.07); }
html { scroll-behavior:smooth; }
body { min-height:100vh; background:var(--bg); color:var(--ink); font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; -webkit-font-smoothing:antialiased; }
body.modal-open { overflow:hidden; }

button,a,select { font:inherit; }
nav { height:66px; display:flex; align-items:center; padding:0 clamp(18px,5vw,64px); background:var(--bg); border-bottom:1px solid var(--border); position:sticky; top:0; z-index:20; }
.logo { color:var(--ink); font-size:20px; font-weight:760; letter-spacing:-.04em; text-decoration:none; }
.nav-back { display:inline-flex; align-items:center; gap:8px; margin-left:28px; color:var(--muted); font-size:13px; text-decoration:none; transition:color .18s; }
.nav-back:hover { color:var(--primary-dark); }
.tool-hero { max-width:820px; margin:auto; padding:58px 24px 34px; text-align:center; }
.tool-hero h1 { margin-bottom:12px; font-size:clamp(32px,5vw,48px); font-weight:760; letter-spacing:-.06em; }
.tool-hero p { max-width:560px; margin:auto; color:var(--muted); font-size:15px; line-height:1.65; }
.tool-area { width:min(920px,100%); margin:auto; padding-left:28px; padding-right:28px; }
.tool-area { padding-bottom:68px; }
.drop-zone { padding:66px 30px; border:1px dashed #b9d4cf; border-radius:18px; background:var(--surface); text-align:center; cursor:pointer; transition:border-color .18s,background .18s,box-shadow .18s; }
.drop-zone:hover,.drop-zone.dragover,.drop-zone:focus-visible { border-color:var(--primary); background:#fbfffe; box-shadow:var(--shadow); outline:none; }
.drop-zone-icon { margin-bottom:16px; color:var(--primary-dark); font-size:32px; }
.drop-zone h3 { margin-bottom:8px; font-size:19px; letter-spacing:-.02em; }
.drop-zone p { margin-bottom:21px; color:var(--muted); font-size:13px; }
.btn-select,.btn-action,.btn-download,.btn-again { cursor:pointer; transition:background .18s,border-color .18s,opacity .18s; }
.btn-select,.btn-action { border:1px solid var(--primary-dark); border-radius:9px; background:var(--primary-dark); color:#fff; font-weight:700; }
.btn-select { padding:11px 20px; font-size:13px; }
.btn-select:hover,.btn-action:hover { background:#2f7f77; }
#fileInput { display:none; }
.upload-error { display:none; max-width:360px; margin:14px auto 0; color:#8f4247; font-size:12px; line-height:1.4; }
.upload-error.visible { display:block; }
.files-panel,.result-area { display:none; width:100%; padding:22px; margin-top:18px; border:1px solid var(--border); border-radius:16px; background:var(--surface); box-shadow:0 4px 14px rgba(35,62,58,.035); }
.files-panel.visible { display:block; }
.panel-header { display:flex; align-items:center; justify-content:space-between; gap:16px; padding-bottom:19px; border-bottom:1px solid var(--border); }
.panel-actions { display:flex; align-items:center; gap:12px; }
.panel-title { overflow:hidden; font-size:16px; font-weight:700; text-overflow:ellipsis; white-space:nowrap; }
.panel-count { color:var(--muted); font-size:12px; white-space:nowrap; }
.btn-change { padding:6px 9px; border:1px solid var(--border); border-radius:7px; background:var(--surface); color:var(--muted); font-size:12px; cursor:pointer; }
.btn-change:hover,.btn-change:focus-visible { border-color:var(--primary); color:var(--primary-dark); outline:none; }
.options-box { margin:20px 0; padding:16px; border:1px solid var(--border); border-radius:11px; background:var(--bg); }
.option-row { display:flex; align-items:center; justify-content:space-between; gap:18px; }
.option-row:focus-within { outline:2px solid rgba(90,174,166,.25); outline-offset:5px; border-radius:8px; }
.option-label { margin-bottom:4px; font-size:14px; font-weight:700; }
.option-hint { color:var(--muted); font-size:12px; }
.quality-choice { display:grid; grid-template-columns:repeat(3, minmax(76px, 1fr)); gap:5px; padding:4px; border:1px solid var(--border); border-radius:10px; background:#f1f6f4; }
.quality-option { min-width:0; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px; padding:8px 10px; border:1px solid transparent; border-radius:7px; background:transparent; color:var(--muted); cursor:pointer; transition:background .18s, border-color .18s, color .18s, box-shadow .18s; }
.quality-option span { font-size:12px; font-weight:700; line-height:1.1; }
.quality-option small { font-size:10px; line-height:1; }
.quality-option:hover { color:var(--ink); background:rgba(255,255,255,.75); }
.quality-option.is-selected { border-color:#b7d8d2; background:var(--surface); color:var(--primary-dark); box-shadow:0 2px 7px rgba(35,62,58,.08); }
.quality-option:focus-visible { outline:3px solid rgba(90,174,166,.28); outline-offset:2px; }
.error-msg { display:none; margin:12px 0; padding:10px 12px; border-left:3px solid var(--danger); background:#fff7f7; color:#8f4247; font-size:12px; }
.error-msg.visible { display:block; }
.btn-action { width:100%; display:flex; align-items:center; justify-content:center; gap:9px; padding:14px; font-size:14px; }
.btn-action:disabled { opacity:.55; cursor:not-allowed; }
.progress-area { display:none; margin-top:20px; }
.progress-area.visible { display:block; }
.progress-bar-wrap { height:6px; margin-bottom:8px; overflow:hidden; border-radius:4px; background:#e8efed; }
.progress-bar { width:0; height:100%; border-radius:4px; background:var(--primary); transition:width .3s; }
.progress-label { color:var(--muted); font-size:12px; text-align:center; }

.result-area { position:fixed; inset:0; z-index:100; display:none; align-items:center; justify-content:center; padding:24px; background:rgba(21,34,32,.38); backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px); }
.result-area.visible { display:flex; }
.result-modal { position:relative; width:min(720px,100%); max-height:min(86vh,760px); overflow:auto; padding:24px; border:1px solid rgba(255,255,255,.65); border-radius:18px; background:var(--surface); box-shadow:0 24px 80px rgba(18,39,35,.24); animation:modalIn .2s ease-out; }
.modal-close { position:absolute; top:14px; right:14px; width:32px; height:32px; border:1px solid var(--border); border-radius:8px; background:var(--surface); color:var(--muted); font-size:22px; line-height:1; cursor:pointer; }
.modal-close:hover,.modal-close:focus-visible { border-color:var(--primary); color:var(--ink); outline:none; }
@keyframes modalIn { from { opacity:0; transform:translateY(10px) scale(.98); } to { opacity:1; transform:translateY(0) scale(1); } }
.result-success { display:flex; align-items:center; gap:12px; padding:13px 42px 13px 15px; margin-bottom:18px; border:1px solid #cfe6e1; border-radius:11px; background:#f4fbf9; }
.result-success-icon { width:36px; height:36px; display:grid; place-items:center; border-radius:10px; background:var(--soft); color:var(--primary-dark); }
.result-success-title { margin-bottom:3px; font-size:15px; font-weight:750; }
.result-success-sub { color:var(--muted); font-size:12px; }
.preview-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(142px,178px)); justify-content:center; gap:12px; max-height:330px; overflow:auto; padding:2px 4px 10px 2px; margin-bottom:18px; }
.preview-card { overflow:hidden; border:1px solid var(--border); border-radius:9px; background:var(--surface); cursor:pointer; transition:border-color .18s,transform .18s,box-shadow .18s; }
.preview-card:hover { border-color:var(--primary); box-shadow:var(--shadow); transform:translateY(-2px); }
.preview-card img { display:block; width:100%; height:190px; object-fit:contain; background:#f1f5f3; }
.preview-card div { padding:8px; color:var(--muted); font-size:11px; text-align:center; }
.result-actions { display:flex; align-items:center; justify-content:center; gap:10px; padding-top:2px; }
.btn-download { flex:0 1 280px; padding:12px 16px; border:0; border-radius:9px; background:var(--ink); color:#fff; font-size:13px; font-weight:700; }
.btn-download:hover { background:#293936; }
.btn-again { padding:12px 16px; border:1px solid var(--border); border-radius:9px; background:var(--surface); color:var(--ink); font-size:13px; }
.btn-again:hover { background:var(--bg); }

/* Visionneuse d'image individuelle : centrée, une image + bouton téléchargement en dessous */
.image-viewer { position:fixed; inset:0; z-index:120; display:none; align-items:center; justify-content:center; padding:24px; background:rgba(21,34,32,.6); backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px); }
.image-viewer.visible { display:flex; }
.image-viewer-inner { position:relative; width:min(560px,100%); max-height:90vh; display:flex; flex-direction:column; align-items:center; gap:16px; padding:28px 24px 24px; border-radius:18px; background:var(--surface); box-shadow:0 24px 80px rgba(18,39,35,.3); animation:modalIn .2s ease-out; }
.image-viewer-frame { width:100%; max-height:56vh; display:flex; align-items:center; justify-content:center; overflow:hidden; border-radius:12px; background:#f1f5f3; border:1px solid var(--border); }
.image-viewer-frame img { max-width:100%; max-height:56vh; object-fit:contain; display:block; }
.image-viewer-caption { color:var(--muted); font-size:13px; font-weight:700; letter-spacing:.01em; }
.image-viewer-actions { display:flex; align-items:center; justify-content:center; gap:10px; width:100%; }
.image-viewer-actions .btn-download { flex:1 1 auto; }
.btn-viewer-nav { flex:0 0 auto; width:38px; height:38px; display:grid; place-items:center; border:1px solid var(--border); border-radius:9px; background:var(--surface); color:var(--ink); font-size:14px; cursor:pointer; transition:border-color .18s,color .18s,opacity .18s; }
.btn-viewer-nav:hover:not(:disabled) { border-color:var(--primary); color:var(--primary-dark); }
.btn-viewer-nav:disabled { opacity:.35; cursor:not-allowed; }

@media (max-width:680px) { nav{height:60px;padding:0 16px}.nav-back{margin-left:16px}.tool-hero{padding:48px 20px 32px}.tool-hero h1{font-size:34px}.tool-area{padding-right:16px;padding-left:16px}.drop-zone{padding:48px 20px}.option-row{align-items:flex-start;flex-direction:column}.option-row select{width:100%}.result-area{padding:14px}.result-modal{max-height:90vh;padding:18px}.result-actions{flex-direction:column}.btn-download,.btn-again{width:100%}.preview-grid{grid-template-columns:repeat(2,minmax(0,1fr));max-height:300px}.preview-card img{height:150px}.btn-download{flex-basis:auto}.image-viewer{padding:14px}.image-viewer-inner{padding:22px 16px 18px}.image-viewer-actions{flex-wrap:wrap}.image-viewer-actions .btn-download{order:1;width:100%}.btn-viewer-nav{order:2}}
@media (prefers-reduced-motion:reduce) { *,*::before,*::after{transition-duration:.01ms!important;scroll-behavior:auto!important} }

/* ==================== PDF → JPG — ERGONOMIE FINALE ==================== */
.tool-area { width: min(880px, 100%); }
.drop-zone { padding: 52px 24px; }
.result-modal { width: min(740px, 100%); }
.preview-grid { grid-template-columns: repeat(auto-fit, minmax(148px, 1fr)); max-height: 360px; }
.image-viewer { padding: clamp(12px, 3vw, 24px); }
.image-viewer-inner { width: min(620px, 100%); max-height: min(88vh, 820px); padding: 20px; gap: 12px; }
.image-viewer-frame { height: min(62vh, 560px); max-height: none; }
.image-viewer-frame img { width: 100%; height: 100%; max-width: 100%; max-height: none; object-fit: contain; }
.image-viewer-caption { font-size: 12px; }
.image-viewer-actions { display: flex; align-items: center; justify-content: center; width: auto; gap: 10px; }
.image-viewer-actions .btn-download { width: 42px; height: 42px; min-width: 42px; flex: 0 0 42px; display: grid; place-items: center; padding: 0; border-radius: 10px; font-size: 14px; }
.image-viewer-actions .btn-download span { display: none; }
.btn-viewer-nav { width: 42px; height: 42px; }
.btn-viewer-nav:focus-visible, .modal-close:focus-visible, .image-viewer-actions .btn-download:focus-visible { outline: 3px solid rgba(90,174,166,.3); outline-offset: 3px; }

@media (max-width:680px) {
    .drop-zone { padding: 42px 18px; }
    .image-viewer-inner { padding: 18px 14px 14px; }
    .image-viewer-frame { height: min(62vh, 480px); }
    .option-row { align-items:stretch; flex-direction:column; }
    .quality-choice { width:100%; }
    .quality-option { padding:9px 6px; }
    .image-viewer-actions { width: auto; gap: 8px; }
    .image-viewer-actions .btn-download { width: 40px; height: 40px; min-width: 40px; flex-basis: 40px; }
    .btn-viewer-nav { width: 40px; height: 40px; }
}