:root {
    --ink: #102f43;
    --muted: #6b7f8d;
    --navy: #0a344e;
    --navy-2: #0e4969;
    --teal: #19a88e;
    --teal-soft: #dff7f1;
    --orange: #f29e4c;
    --red: #dc5a5a;
    --paper: #f5f7f8;
    --white: #fff;
    --line: #dfe7eb;
    --shadow: 0 18px 50px rgba(15, 47, 65, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: "DM Sans", sans-serif; color: var(--ink); background: var(--paper); }
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }

.app-shell { min-height: 100vh; display: flex; }
.sidebar { position: fixed; inset: 0 auto 0 0; width: 260px; display: flex; flex-direction: column; padding: 28px 20px; color: #fff; background: linear-gradient(165deg, #082f49 0%, #0a3a54 55%, #095b68 100%); z-index: 30; }
.brand { display: flex; align-items: center; gap: 12px; padding: 0 8px 30px; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; font: 800 14px Manrope, sans-serif; background: linear-gradient(135deg, #21c4a7, #9fe6d7); color: #073448; box-shadow: 0 8px 22px rgba(19, 190, 160, .24); }
.brand strong, .brand small { display: block; }
.brand strong { font: 800 19px Manrope, sans-serif; letter-spacing: -.4px; }
.brand small { margin-top: 2px; color: rgba(255,255,255,.58); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.nav-list { display: grid; gap: 7px; }
.nav-list a { display: flex; align-items: center; gap: 13px; padding: 13px 14px; color: rgba(255,255,255,.72); border-radius: 12px; font-size: 14px; font-weight: 600; transition: .2s ease; }
.nav-list a span { width: 22px; text-align: center; font-size: 19px; }
.nav-list a:hover, .nav-list a.active { color: #fff; background: rgba(255,255,255,.12); transform: translateX(2px); }
.nav-list a.active { box-shadow: inset 3px 0 #2bd0b2; }
.sidebar-foot { margin-top: auto; border-top: 1px solid rgba(255,255,255,.12); padding-top: 20px; }
.user-card { display: flex; align-items: center; gap: 10px; }
.avatar { width: 38px; height: 38px; display: grid; place-items: center; background: #fff; color: var(--navy); border-radius: 50%; font-weight: 800; }
.user-card strong, .user-card small { display: block; }
.user-card strong { font-size: 13px; }
.user-card small { margin-top: 2px; color: rgba(255,255,255,.55); font-size: 11px; }
.logout-link { display: block; margin-top: 15px; color: rgba(255,255,255,.62); font-size: 12px; }

.main-content { flex: 1; margin-left: 260px; min-width: 0; }
.topbar { height: 112px; display: flex; align-items: center; gap: 18px; padding: 22px clamp(22px, 4vw, 56px); background: rgba(255,255,255,.86); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.topbar h1 { margin: 2px 0 0; font: 800 clamp(22px, 2.6vw, 31px) Manrope, sans-serif; letter-spacing: -.8px; }
.eyebrow { margin: 0; color: var(--teal); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .14em; }
.date-chip { margin-left: auto; padding: 9px 13px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: #fff; font-size: 12px; text-transform: capitalize; }
.menu-toggle { display: none; border: 0; background: transparent; font-size: 22px; color: var(--ink); }
.page-content { padding: 34px clamp(22px, 4vw, 56px) 60px; }

.alert { margin: 18px clamp(22px, 4vw, 56px) 0; padding: 14px 17px; border-radius: 12px; display: flex; justify-content: space-between; align-items: center; font-size: 14px; }
.alert-success { color: #096955; background: #dff7f1; border: 1px solid #b8eadf; }
.alert-error { color: #9a3030; background: #feecec; border: 1px solid #f4caca; }
.alert button { border: 0; background: transparent; font-size: 20px; cursor: pointer; color: inherit; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 18px; margin-bottom: 26px; }
.stat-card { position: relative; overflow: hidden; min-height: 148px; padding: 22px; border: 1px solid rgba(213,224,229,.8); border-radius: 18px; background: var(--white); box-shadow: var(--shadow); }
.stat-card::after { content: ''; position: absolute; width: 90px; height: 90px; right: -30px; top: -30px; border-radius: 50%; background: var(--accent-soft, #e8f4f5); }
.stat-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 11px; color: var(--accent, var(--teal)); background: var(--accent-soft, var(--teal-soft)); font-size: 18px; }
.stat-card p { margin: 16px 0 5px; color: var(--muted); font-size: 12px; font-weight: 600; }
.stat-card strong { font: 800 24px Manrope, sans-serif; letter-spacing: -.7px; }
.stat-card.orange { --accent: #d67a25; --accent-soft: #fff0df; }
.stat-card.blue { --accent: #2671a1; --accent-soft: #e3f1fa; }
.stat-card.red { --accent: #ce4d57; --accent-soft: #fde8ea; }

.content-grid { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(280px, .8fr); gap: 22px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 12px 38px rgba(15,47,65,.055); overflow: hidden; }
.panel + .panel { margin-top: 22px; }
.panel-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 21px 23px; border-bottom: 1px solid var(--line); }
.panel-header h2 { margin: 0; font: 800 17px Manrope, sans-serif; letter-spacing: -.3px; }
.panel-header p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.panel-body { padding: 23px; }
.panel-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 10px; padding: 10px 14px; cursor: pointer; font-weight: 700; font-size: 13px; transition: transform .18s, box-shadow .18s; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, #169d85, #087f78); box-shadow: 0 8px 20px rgba(15,150,131,.2); }
.btn-secondary { color: var(--navy); background: #edf3f5; }
.btn-outline { color: var(--navy); background: #fff; border: 1px solid var(--line); }
.btn-danger { color: #b43e46; background: #fdebed; }
.btn-sm { padding: 8px 10px; font-size: 11px; border-radius: 8px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { padding: 12px 14px; color: #84939c; background: #f7f9fa; font-size: 10px; text-transform: uppercase; letter-spacing: .09em; text-align: left; white-space: nowrap; }
td { padding: 15px 14px; border-top: 1px solid #edf1f3; font-size: 13px; vertical-align: middle; }
tbody tr:hover { background: #fbfdfd; }
.number-link { color: #0f8778; font-weight: 800; }
.subtext { display: block; margin-top: 3px; color: var(--muted); font-size: 11px; }
.amount { font-weight: 700; white-space: nowrap; }
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 5px 9px; border-radius: 999px; font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; }
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge-payee { color: #09866f; background: #e0f6f1; }
.badge-partielle { color: #c17020; background: #fff0dd; }
.badge-brouillon { color: #637783; background: #edf2f4; }
.badge-en_retard { color: #c4434d; background: #fde8eb; }
.actions { display: flex; gap: 6px; flex-wrap: wrap; }
.search { width: min(240px, 100%); padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; outline: none; background: #f9fbfb; }
.search:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(25,168,142,.1); }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.form-group { display: grid; gap: 7px; }
.form-group.full { grid-column: 1 / -1; }
label { font-size: 12px; font-weight: 800; color: #405c6b; }
input, select, textarea { width: 100%; border: 1px solid #d9e3e7; border-radius: 10px; padding: 11px 12px; outline: none; color: var(--ink); background: #fff; }
input:focus, select:focus, textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(25,168,142,.11); }
textarea { resize: vertical; min-height: 100px; }
.form-help { color: var(--muted); font-size: 11px; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; padding-top: 20px; border-top: 1px solid var(--line); margin-top: 22px; }
.balance-box { padding: 13px 15px; border-radius: 12px; color: #096955; background: var(--teal-soft); }
.balance-box small, .balance-box strong { display: block; }
.balance-box small { font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.balance-box strong { margin-top: 4px; font: 800 19px Manrope, sans-serif; }

.drop-zone { position: relative; padding: 28px 20px; border: 2px dashed #bcd2d8; border-radius: 14px; text-align: center; color: var(--muted); background: #f8fbfb; transition: .2s; }
.drop-zone:hover { border-color: var(--teal); background: #f3fcfa; }
.drop-zone input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.drop-zone strong { display: block; color: var(--ink); margin-bottom: 5px; }
.drop-zone .file-name { display: block; margin-top: 8px; color: var(--teal); font-size: 12px; font-weight: 700; }

.quick-list { display: grid; gap: 12px; }
.quick-item { display: flex; align-items: center; gap: 12px; padding: 13px; border: 1px solid var(--line); border-radius: 12px; }
.quick-item .dot { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; background: var(--teal-soft); color: var(--teal); }
.quick-item strong { display: block; font-size: 13px; }
.quick-item small { color: var(--muted); font-size: 11px; }
.empty-state { padding: 50px 20px; text-align: center; color: var(--muted); }
.empty-state span { display: block; font-size: 35px; margin-bottom: 10px; }
.empty-state h3 { margin: 0 0 6px; color: var(--ink); }
.invoice-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 22px; }
.summary-tile { padding: 16px; border: 1px solid var(--line); border-radius: 13px; background: #fafcfc; }
.summary-tile small, .summary-tile strong { display: block; }
.summary-tile small { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.summary-tile strong { margin-top: 5px; font-size: 15px; }

.login-page { min-height: 100vh; display: grid; grid-template-columns: 1fr 1fr; background: #fff; }
.login-visual { position: relative; overflow: hidden; display: flex; align-items: flex-end; padding: 64px; color: #fff; background: linear-gradient(145deg, #073047, #075464 65%, #0e917f); }
.login-visual::before, .login-visual::after { content: ''; position: absolute; border-radius: 50%; border: 1px solid rgba(255,255,255,.14); }
.login-visual::before { width: 500px; height: 500px; right: -130px; top: -140px; }
.login-visual::after { width: 350px; height: 350px; right: -50px; top: -65px; }
.visual-content { position: relative; z-index: 2; max-width: 520px; }
.visual-content h1 { margin: 24px 0 14px; font: 800 clamp(38px, 5vw, 65px)/1.02 Manrope, sans-serif; letter-spacing: -2.7px; }
.visual-content p { color: rgba(255,255,255,.74); font-size: 16px; line-height: 1.7; }
.visual-pill { display: inline-flex; padding: 7px 11px; border: 1px solid rgba(255,255,255,.2); border-radius: 999px; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.login-form-wrap { display: grid; place-items: center; padding: 45px; }
.login-card { width: min(420px, 100%); }
.login-card .brand { color: var(--ink); padding-left: 0; }
.login-card .brand small { color: var(--muted); }
.login-card h2 { margin: 35px 0 8px; font: 800 30px Manrope, sans-serif; letter-spacing: -1px; }
.login-card > p { color: var(--muted); margin: 0 0 30px; }
.login-card form { display: grid; gap: 18px; }
.password-field { position: relative; }
.password-field button { position: absolute; right: 8px; top: 8px; border: 0; background: #f1f5f6; border-radius: 7px; padding: 5px 8px; cursor: pointer; color: var(--muted); font-size: 11px; }
.demo-box { margin-top: 22px; padding: 13px; border-radius: 10px; background: #f2f7f8; color: var(--muted); font-size: 11px; line-height: 1.6; }

@media (max-width: 1100px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .content-grid { grid-template-columns: 1fr; }
}
@media (max-width: 800px) {
    .sidebar { transform: translateX(-100%); transition: transform .25s ease; }
    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(3,25,37,.5); z-index: 20; }
    .sidebar-overlay.show { display: block; }
    .main-content { margin-left: 0; }
    .menu-toggle { display: block; }
    .login-page { grid-template-columns: 1fr; }
    .login-visual { display: none; }
    .login-form-wrap { min-height: 100vh; padding: 30px 22px; }
    .invoice-summary { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .stats-grid, .form-grid { grid-template-columns: 1fr; }
    .form-group.full { grid-column: auto; }
    .topbar { height: 96px; padding: 18px; }
    .date-chip { display: none; }
    .page-content { padding: 22px 16px 45px; }
    .panel-header { align-items: flex-start; flex-direction: column; }
    .panel-actions, .search { width: 100%; }
    .panel-actions .btn { flex: 1; }
    .invoice-summary { grid-template-columns: 1fr; }
}