:root{--primary:#3498db;--primary-dark:#2980b9;--secondary:#2ecc71;--accent:#e74c3c;--bg:#f5f7fa;--sidebar-bg:#1e293b;--sidebar-text:#e2e8f0;--sidebar-hover:#334155;--card-bg:#fff;--text:#2c3e50;--text-muted:#94a3b8;--border:#e2e8f0;--error:#e74c3c;--success:#2ecc71;--warning:#f39c12}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5}.login-container{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{background:var(--card-bg);border-radius:12px;width:100%;max-width:400px;padding:2.5rem;box-shadow:0 4px 24px #00000014}.login-card h1{text-align:center;color:var(--text);margin-bottom:.25rem}.login-card .subtitle{text-align:center;color:var(--text-muted);margin-bottom:1.5rem;font-size:.9rem}.form-group{margin-bottom:1rem}.form-group 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