:root{--font-sans:"Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--bg-app:#f8f9fa;--bg-sidebar:#f3f4f5;--bg-surface:#fff;--bg-surface-elevated:#fff;--bg-subtle:#00000005;--border-color:#c6c6cd59;--primary:#2170e4;--primary-hover:#0058be;--primary-light:#2170e414;--text-primary:#191c1d;--text-secondary:#45464d;--text-muted:#76777d;--color-devis:#0058be;--color-devis-bg:#d8e2ff;--color-encours:#b45309;--color-encours-bg:#fbbf241f;--color-termine:#047857;--color-termine-bg:#10b9811f;--color-perdu:#b91c1c;--color-perdu-bg:#ffdad6;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--shadow-sm:0 1px 3px #0000000d, 0 1px 2px #00000008;--shadow-md:0 4px 20px #0000000a;--shadow-lg:0 10px 30px #0000000f;--transition:all .2s cubic-bezier(.4, 0, .2, 1);--blur:blur(12px)}.dark{--bg-app:#090a0f;--bg-sidebar:#12141c;--bg-surface:#1e202b;--bg-surface-elevated:#282a38;--bg-subtle:#ffffff08;--border-color:#ffffff14;--primary:#3b82f6;--primary-hover:#2563eb;--primary-light:#3b82f626;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--color-devis:#38bdf8;--color-devis-bg:#38bdf81a;--color-encours:#fbbf24;--color-encours-bg:#fbbf241a;--color-termine:#10b981;--color-termine-bg:#10b9811a;--color-perdu:#f43f5e;--color-perdu-bg:#f43f5e1a;--shadow-sm:0 2px 8px #0000004d;--shadow-md:0 8px 30px #0006;--shadow-lg:0 12px 40px #00000080}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{background-color:var(--bg-app);color:var(--text-primary);font-family:var(--font-sans);min-height:100vh;transition:background-color var(--transition), color var(--transition);line-height:1.5;overflow-x:hidden}.material-symbols-outlined{font-variation-settings:"FILL" 0, "wght" 500, "GRAD" 0, "opsz" 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100px}}h1{letter-spacing:-.5px;color:var(--text-primary);font-size:28px;font-weight:700}.subtitle{color:var(--text-secondary);margin-top:4px;font-size:14px}.header-section{justify-content:space-between;align-items:center;margin-bottom:32px;display:flex}.btn{font-family:var(--font-sans);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);border:none;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:600;display:inline-flex}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:0 2px 6px #2170e433}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px)}.btn-primary:active{transform:translateY(1px)}.btn-secondary{color:var(--text-secondary);border:1px solid var(--border-color);background-color:#00000008}.dark .btn-secondary{background-color:#ffffff08}.btn-secondary:hover{background-color:#0000000f}.dark 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