/* =========================================================
   BookSwap — feuille de style commune
   ========================================================= */
:root{
  --navy:#16255a; --navy-dark:#0f1c47; --navy2:#1e3a8a; --blue:#2563eb;
  --light:#f4f6fb; --white:#fff; --border:#e2e6f0;
  --text:#1f2937; --muted:#6b7280;
  --green:#16a34a; --red:#dc2626; --orange:#f59e0b;
  --radius:10px; --shadow:0 4px 18px rgba(20,35,80,.10);
  --sidebar:250px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--light);color:var(--text);line-height:1.5}
a{text-decoration:none;color:inherit}
img{max-width:100%}
::selection{background:#c7d6ff}

/* ---------- Boutons ---------- */
.btn{border:none;border-radius:6px;padding:9px 17px;font-size:14px;font-family:inherit;cursor:pointer;transition:.15s;display:inline-flex;align-items:center;gap:6px;justify-content:center}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--navy2);color:#fff}
.btn-primary:hover{background:var(--blue)}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5)}
.btn-outline:hover{background:rgba(255,255,255,.14)}
.btn-ghost{background:#eef2fb;color:var(--navy2)}
.btn-ghost:hover{background:#e0e8fb}
.btn-danger{background:#fee2e2;color:var(--red)}
.btn-danger:hover{background:#fecaca}
.btn-warn{background:#fef3c7;color:#92400e}
.btn-warn:hover{background:#fde68a}
.btn-ok{background:#dcfce7;color:#166534}
.btn-sm{padding:5px 11px;font-size:12.5px}
.btn-block{width:100%;padding:12px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---------- En-tête public ---------- */
header.topbar{background:var(--navy);color:#fff;padding:0 28px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px;position:sticky;top:0;z-index:50;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.logo{font-size:21px;font-weight:700;white-space:nowrap}
.logo span{color:#7aa2ff}
nav.main-nav{display:flex;gap:24px;font-size:15px;flex:1}
nav.main-nav a{padding:6px 0;border-bottom:2px solid transparent;cursor:pointer}
nav.main-nav a:hover,nav.main-nav a.active{border-bottom-color:#7aa2ff}
.auth-btns{display:flex;gap:10px;align-items:center}
.user-chip{display:flex;align-items:center;gap:9px;font-size:14px}
.user-chip .av{width:32px;height:32px;border-radius:50%;background:#2b4a9e;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(120deg,#16255a,#2b4a9e);color:#fff;padding:56px 28px;text-align:center}
.hero h1{font-size:34px;margin-bottom:10px;font-weight:700}
.hero p{opacity:.85;font-size:16px}

/* ---------- Recherche ---------- */
.search-zone{max-width:1120px;margin:-28px auto 0;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;display:flex;gap:12px;flex-wrap:wrap}
.search-zone input,.search-zone select{flex:1;min-width:150px;padding:11px 13px;border:1px solid var(--border);border-radius:6px;font-size:14px;font-family:inherit}
input:focus,select:focus,textarea:focus{outline:2px solid #c7d6ff;border-color:#c7d6ff}

/* ---------- Layout ---------- */
.wrap{max-width:1120px;margin:0 auto;padding:32px 20px 60px}
.section-title{font-size:20px;color:var(--navy);margin:24px 0 16px;font-weight:600}
.page-title{font-size:24px;color:var(--navy);font-weight:600;margin-bottom:6px}
.page-sub{font-size:14px;color:var(--muted);margin-bottom:22px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.card h3{font-size:16px;color:var(--navy);margin-bottom:14px;font-weight:600}
.head-flex{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.head-flex h3{margin:0}

/* ---------- Grille catalogue ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:20px}
.book-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.18s}
.book-card:hover{transform:translateY(-4px);box-shadow:0 8px 22px rgba(20,35,80,.13)}
.cover{height:148px;display:flex;align-items:center;justify-content:center;font-size:42px;color:#fff;font-weight:700;letter-spacing:1px}
.book-body{padding:14px;flex:1;display:flex;flex-direction:column;gap:4px}
.book-body h3{font-size:15px;color:var(--navy);font-weight:600}
.book-body .author,.book-body .meta{font-size:12.5px;color:var(--muted)}
.price{font-weight:700;color:var(--navy2);font-size:16px;margin-top:5px}
.tag{display:inline-block;font-size:11px;padding:3px 8px;border-radius:20px;background:#eef2fb;color:var(--navy2);width:fit-content}
.book-actions{display:flex;gap:8px;padding:0 14px 14px}
.book-actions .btn{flex:1}
.empty{text-align:center;color:var(--muted);padding:44px 20px;grid-column:1/-1;font-size:14.5px}
.empty .big{font-size:34px;display:block;margin-bottom:10px}

/* ---------- Barre latérale (espaces privés) ---------- */
body.app{display:flex;min-height:100vh}
aside.side{width:var(--sidebar);background:var(--navy);color:#cbd5e1;flex:none;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
aside.side.admin{background:var(--navy-dark)}
.brand{padding:19px 20px;border-bottom:1px solid rgba(255,255,255,.1)}
.brand .t{font-size:21px;font-weight:700;color:#fff}
.brand .t span{color:#7aa2ff}
.brand .r{font-size:11px;color:var(--orange);letter-spacing:.6px;margin-top:3px}
.menu{flex:1;padding:14px 10px;overflow:auto}
.menu a{display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:7px;font-size:14px;cursor:pointer;margin-bottom:3px}
.menu a:hover{background:rgba(255,255,255,.08);color:#fff}
.menu a.active{background:#2b4a9e;color:#fff;font-weight:500}
.menu .sep{height:1px;background:rgba(255,255,255,.12);margin:10px 14px}
.badge{background:var(--red);color:#fff;font-size:11px;border-radius:10px;padding:1px 7px;margin-left:auto}
.who{padding:14px 20px;border-top:1px solid rgba(255,255,255,.1);font-size:12.5px;color:#94a3b8}
.who b{color:#fff;display:block;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
main.content{flex:1;padding:26px 32px 60px;max-width:1300px;min-width:0}
.view{display:none}.view.active{display:block;animation:fade .18s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* ---------- Profil / statistiques ---------- */
.top-row{display:grid;grid-template-columns:1.2fr 1fr;gap:20px}
.profil{display:flex;gap:16px;align-items:center}
.avatar{width:78px;height:78px;border-radius:50%;background:linear-gradient(135deg,#7c3aed,#2563eb);color:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:700;flex:none}
.profil h2{font-size:18px;color:var(--navy);margin-bottom:3px}
.profil .mail{font-size:13px;color:var(--muted)}
.pill{display:inline-block;background:#eef2fb;color:var(--navy2);font-size:12px;padding:3px 10px;border-radius:20px;margin-top:7px}
.link-edit{color:var(--blue);font-size:13px;cursor:pointer;display:inline-block;margin-top:8px}
.link-edit:hover{text-decoration:underline}
.stats{display:flex;justify-content:space-around;text-align:center;gap:10px}
.stat .circle{width:64px;height:64px;border-radius:50%;border:3px solid var(--navy2);display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;color:var(--navy);margin:0 auto 7px}
.stat small{font-size:12px;color:var(--muted)}
.info-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.line{display:flex;justify-content:space-between;gap:10px;font-size:13.5px;padding:7px 0;border-bottom:1px dashed var(--border)}
.line:last-child{border:none}
.line b{color:var(--navy2);white-space:nowrap}

/* ---------- KPI admin ---------- */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(185px,1fr));gap:18px;margin-bottom:22px}
.kpi{background:#fff;border:1px solid var(--border);border-left:4px solid var(--navy2);border-radius:var(--radius);padding:18px}
.kpi .v{font-size:28px;font-weight:700;color:var(--navy)}
.kpi .l{font-size:13px;color:var(--muted);margin-top:3px}
.kpi.orange{border-left-color:var(--orange)}
.kpi.red{border-left-color:var(--red)}
.kpi.green{border-left-color:var(--green)}

/* ---------- Tableaux ---------- */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th{text-align:left;padding:10px;background:#f8fafc;color:var(--navy);font-weight:600;border-bottom:2px solid var(--border);font-size:13px;white-space:nowrap}
td{padding:10px;border-bottom:1px solid var(--border);vertical-align:middle}
tr:hover td{background:#fafbff}
td.empty-row{text-align:center;color:var(--muted);padding:30px}
.acts{display:flex;gap:5px;flex-wrap:wrap}
.st{font-size:11.5px;padding:3px 9px;border-radius:20px;font-weight:500;white-space:nowrap;display:inline-block}
.st.publiee,.st.vente{background:#dbeafe;color:#1e40af}
.st.vendue,.st.actif,.st.traite{background:#dcfce7;color:#166534}
.st.attente,.st.signalee,.st.en_attente{background:#fef3c7;color:#92400e}
.st.echange{background:#ede9fe;color:#5b21b6}
.st.archivee{background:#f1f5f9;color:#475569}
.st.banni{background:#fee2e2;color:#991b1b}
.role{font-size:11.5px;padding:3px 9px;border-radius:5px;background:#eef2fb;color:var(--navy2)}
.role.admin{background:#fef3c7;color:#92400e}
.filters{display:flex;gap:10px;flex-wrap:wrap}
.filters input,.filters select{padding:9px 12px;border:1px solid var(--border);border-radius:6px;font-size:13.5px;font-family:inherit;min-width:145px}

/* ---------- Mini cartes ---------- */
.mini-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px}
.mini{display:flex;gap:12px;border:1px solid var(--border);border-radius:8px;padding:12px}
.mini .cov{width:46px;height:64px;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff;flex:none;font-weight:700}
.mini h4{font-size:14px;color:var(--navy)}
.mini small{color:var(--muted);font-size:12px;display:block}
.mini .p{color:var(--navy2);font-weight:700;font-size:14px;margin-top:3px}

/* ---------- Messagerie ---------- */
.msg-list{display:flex;flex-direction:column;gap:10px}
.msg-item{border:1px solid var(--border);border-radius:8px;padding:13px;cursor:pointer}
.msg-item:hover{background:#fafbff}
.msg-item .from{font-weight:600;color:var(--navy);font-size:14px}
.msg-item .prev{font-size:13px;color:var(--muted);margin-top:3px;white-space:pre-wrap}
.msg-item .date{float:right;font-size:12px;color:var(--muted)}
.msg-item.unread{border-left:3px solid var(--blue);background:#f8faff}

/* ---------- Modales & formulaires ---------- */
.overlay{position:fixed;inset:0;background:rgba(15,23,42,.55);display:none;align-items:center;justify-content:center;z-index:100;padding:20px}
.overlay.open{display:flex}
.modal{background:#fff;border-radius:12px;width:100%;max-width:470px;max-height:90vh;overflow:auto;padding:26px;animation:pop .16s ease}
.modal.wide{max-width:640px}
@keyframes pop{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
.modal h2{font-size:19px;color:var(--navy);margin-bottom:4px}
.modal .sub{font-size:13px;color:var(--muted);margin-bottom:16px}
.close-x{float:right;cursor:pointer;color:var(--muted);font-size:20px;line-height:1}
.close-x:hover{color:var(--red)}
.field{margin-bottom:13px}
.field label{display:block;font-size:13px;margin-bottom:5px;font-weight:500;color:#374151}
.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;font-family:inherit;background:#fff}
.field textarea{resize:vertical}
.field input[readonly]{background:#f8fafc;color:var(--muted)}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row .field{flex:1;min-width:140px}
.modal-actions{display:flex;gap:10px;margin-top:18px}
.modal-actions .btn{flex:1}
.msg{padding:10px 12px;border-radius:6px;font-size:13px;margin-bottom:12px;display:none}
.msg.ok{background:#dcfce7;color:#166534;display:block}
.msg.err{background:#fee2e2;color:#991b1b;display:block}
.note{background:#fff7ed;border-left:3px solid var(--orange);padding:10px 12px;font-size:13px;color:#92400e;border-radius:4px;margin-top:12px}
.detail-head{display:flex;gap:18px;margin-bottom:14px;flex-wrap:wrap}
.detail-head .cover{width:108px;height:148px;border-radius:8px;flex:none}
.dl{font-size:14px;padding:6px 0;border-bottom:1px dashed var(--border)}
.dl:last-child{border:none}
.dl b{color:var(--navy);display:inline-block;min-width:132px}

/* ---------- Pages d'authentification (maquette Figure 1) ---------- */
body.auth{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:34px 18px;
  background:
    radial-gradient(circle at 20% 20%, rgba(37,99,235,.10), transparent 60%),
    radial-gradient(circle at 80% 70%, rgba(22,37,90,.12), transparent 60%),
    repeating-linear-gradient(90deg,#e8edf7 0 14px,#dfe6f4 14px 22px,#eef2fb 22px 34px,#e3eaf6 34px 46px),
    var(--light);
}
body.auth::before{content:"";position:fixed;inset:0;backdrop-filter:blur(6px);background:rgba(244,246,251,.72);z-index:0}
.auth-wrap{position:relative;z-index:1;width:100%;max-width:430px;text-align:center}
.auth-logo{font-size:27px;font-weight:700;color:var(--navy);margin-bottom:18px;letter-spacing:.3px}
.auth-logo span{color:var(--blue)}
.auth-card{background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:0 10px 34px rgba(20,35,80,.13);padding:30px 28px;text-align:left}
.auth-card h1{font-size:20px;color:var(--navy);text-align:center;margin-bottom:22px;font-weight:600}
.auth-card .field label{font-size:12.5px;color:#4b5563}
.input-icon{position:relative}
.input-icon input{padding-left:38px}
.input-icon .ic{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:#9aa4b8;font-size:14px}
.input-icon .eye{position:absolute;right:10px;top:50%;transform:translateY(-50%);cursor:pointer;color:#9aa4b8;font-size:15px;background:none;border:none}
.auth-row{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;margin:6px 0 18px}
.auth-row label{color:var(--muted);display:flex;align-items:center;gap:6px;cursor:pointer}
.auth-row a{color:var(--blue);cursor:pointer}
.auth-row a:hover{text-decoration:underline}
.auth-sep{display:flex;align-items:center;gap:10px;color:#9aa4b8;font-size:12px;margin:20px 0 14px}
.auth-sep::before,.auth-sep::after{content:"";flex:1;height:1px;background:var(--border)}
.auth-alt{text-align:center;font-size:13.5px}
.auth-alt a{color:var(--blue);font-weight:500}
.auth-alt a:hover{text-decoration:underline}
.auth-legal{position:relative;z-index:1;text-align:center;font-size:11.5px;color:var(--muted);margin-top:16px;line-height:1.7}
.auth-legal a{color:var(--muted);text-decoration:underline}
.auth-card.large{max-width:none}
.auth-wrap.large{max-width:560px}

/* ---------- Onglets du bloc d'authentification partagé ---------- */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:16px;flex-wrap:wrap}
.tab{background:none;border:none;border-bottom:2px solid transparent;padding:9px 12px;font-size:13.5px;font-family:inherit;color:var(--muted);cursor:pointer}
.tab:hover{color:var(--navy)}
.tab.active{color:var(--navy2);border-bottom-color:var(--navy2);font-weight:600}
.onglet{display:none}
.onglet.active{display:block}
.banniere{background:#eef2fb;border:1px solid #cfdcf7;color:var(--navy);border-radius:8px;padding:13px 15px;font-size:13.5px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:16px;text-align:left}
.banniere .btn{margin-left:auto}

/* ---------- Notification ---------- */
.toast{position:fixed;bottom:24px;right:24px;background:var(--navy);color:#fff;padding:13px 20px;border-radius:8px;font-size:14px;opacity:0;transform:translateY(12px);transition:.25s;z-index:200;pointer-events:none;max-width:340px}
.toast.show{opacity:1;transform:none}

/* ---------- Pied de page ---------- */
footer{background:var(--navy);color:#cbd5e1;padding:24px 28px;text-align:center;font-size:13px}
footer a{color:#7aa2ff}
footer a:hover{text-decoration:underline}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .top-row,.info-row{grid-template-columns:1fr}
  nav.main-nav{display:none}
}
@media(max-width:720px){
  body.app{flex-direction:column}
  aside.side{width:100%;height:auto;position:static}
  .menu{display:flex;flex-wrap:wrap}
  .menu a{margin:0 3px 3px 0}
  main.content{padding:20px 16px 50px}
  .hero h1{font-size:26px}
}

/* ---------- Chargement ---------- */
.chargement{position:fixed;top:12px;right:12px;background:#fff;border:1px solid var(--border);border-radius:8px;padding:8px 14px;font-size:13px;color:var(--navy);box-shadow:var(--shadow);display:none;align-items:center;gap:8px;z-index:300}
.chargement.on{display:flex}
.spin{width:13px;height:13px;border:2px solid #c7d6ff;border-top-color:var(--navy2);border-radius:50%;animation:tourne .7s linear infinite;display:inline-block}
@keyframes tourne{to{transform:rotate(360deg)}}
code{background:#eef2fb;padding:1px 5px;border-radius:4px;font-size:12.5px}

/* ---------- Boutons afficher / masquer les mots de passe ---------- */
.champ-mdp{position:relative;display:block}
.champ-mdp input{width:100%;padding-right:42px}
.champ-mdp .oeil,.input-icon .eye{position:absolute;right:8px;top:50%;transform:translateY(-50%);
  background:none;border:none;cursor:pointer;font-size:15px;line-height:1;color:#9aa4b8;padding:4px;border-radius:5px}
.champ-mdp .oeil:hover,.input-icon .eye:hover{color:var(--navy2);background:#eef2fb}
.champ-mdp .oeil:focus-visible,.input-icon .eye:focus-visible{outline:2px solid #c7d6ff}