/* ===== App Shell ===== */
.app-shell{display:flex;height:100vh;overflow:hidden;}

/* ===== Sidebar (White, Clean, Modern SaaS) ===== */
.sidebar{width:240px;background:var(--sidebar-bg);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;}
.sidebar-logo{padding:20px 16px 20px;display:flex;align-items:center;gap:10px;font-weight:700;font-size:15px;color:var(--text);}
.sidebar-logo svg{flex-shrink:0;}
.sidebar-nav{flex:1;padding:0 10px;overflow-y:auto;}
.nav-group{margin-bottom:12px;}
.nav-label{font-size:10.5px;font-weight:600;color:var(--text3);text-transform:uppercase;letter-spacing:.8px;padding:12px 12px 4px;}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-sm);cursor:pointer;color:var(--text2);font-size:13.5px;transition:all .15s;user-select:none;position:relative;border:none;background:transparent;width:100%;text-align:left;}
.nav-item:hover{background:#F3F4F6;color:var(--text);}
.nav-item.active{background:var(--primary-light);color:var(--primary);font-weight:600;}
.nav-item.active::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:0 3px 3px 0;background:var(--primary);}
.nav-icon{width:18px;text-align:center;flex-shrink:0;font-size:15px;}
.sidebar-footer{padding:14px 16px;border-top:1px solid var(--border);}
.sidebar-user{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.sidebar-avatar{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:#fff;flex-shrink:0;background:var(--purple);}
.sidebar-avatar.admin{background:var(--primary);}
.sidebar-avatar.pm{background:var(--orange);}
.sidebar-avatar.fullstack{background:var(--success);}
.sidebar-user-info .user-name{font-size:13px;font-weight:500;color:var(--text);}
.sidebar-user-info .user-role{font-size:11px;color:var(--text3);}
.sidebar-logout{width:100%;padding:7px 14px;border-radius:var(--radius-sm);border:1px solid var(--border);background:#fff;color:var(--text2);cursor:pointer;font-size:12px;transition:all .15s;text-align:center;}
.sidebar-logout:hover{border-color:var(--primary);color:var(--primary);}

/* ===== Main Content ===== */
.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0;background:var(--bg);}
.topbar{height:52px;background:var(--card);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;flex-shrink:0;}
.topbar-title{font-size:16px;font-weight:600;color:var(--text);}
.topbar-actions{display:flex;align-items:center;gap:10px;}
.top-search{display:flex;align-items:center;gap:6px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 14px;font-size:13px;color:var(--text2);min-width:220px;outline:none;transition:all .15s;}
.top-search:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(53,86,216,.08);}
.page-content{flex:1;overflow-y:auto;padding:20px 24px;}

/* ===== View Tabs (Spreadsheet / Timeline / Calendar / Board) ===== */
.view-tabs{display:flex;align-items:center;gap:0;padding:0 24px;background:var(--card);border-bottom:1px solid var(--border);}
.view-tab{padding:10px 16px;font-size:13px;color:var(--text3);cursor:pointer;border:none;background:transparent;border-bottom:2px solid transparent;transition:all .12s;font-weight:500;display:flex;align-items:center;gap:6px;}
.view-tab:hover{color:var(--text);}
.view-tab.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600;}
.view-tab-icon{font-size:14px;}

/* ===== Login Page ===== */
.auth-page{display:flex;min-height:100vh;background:#f9fafb;}
.login-left{flex:1;position:relative;overflow:hidden;}
.login-left .hero-image{position:absolute;inset:0;}
.login-left .hero-image img{width:100%;height:100%;object-fit:cover;}
.login-left .overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(30,41,59,.82) 0%,rgba(15,23,42,.7) 100%);}
.login-left .hero-content{position:relative;z-index:1;height:100%;display:flex;flex-direction:column;justify-content:center;padding:80px 60px;color:#fff;}
.login-left .brand{display:flex;align-items:flex-start;margin-bottom:0;}
.login-left .brand-logo{max-width:100%;height:auto;filter:drop-shadow(0 4px 20px rgba(53,86,216,0.3));}
.login-right{width:440px;display:flex;align-items:center;justify-content:center;background:#fff;padding:32px;flex-shrink:0;}
.login-form-wrapper{width:100%;max-width:350px;}
.form-header{margin-bottom:24px;}
.form-header h2{font-size:26px;font-weight:700;color:var(--text);margin:0 0 6px;letter-spacing:-0.3px;}
.form-header p{font-size:14px;color:var(--text2);margin:0;}
.form-group{margin-bottom:16px;}
.form-label{display:block;font-size:13px;font-weight:600;color:var(--text);margin-bottom:6px;}
.form-input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;outline:none;transition:border-color .15s,box-shadow .15s;background:#fff;}
.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(53,86,216,.08);}
.form-input::placeholder{color:#c4c8d0;}
select.form-input{appearance:auto;background:#fff;}
textarea.form-input{resize:vertical;min-height:80px;}
.form-options{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;font-size:13px;}
.form-options label{display:flex;align-items:center;gap:6px;color:var(--text2);cursor:pointer;}
.form-options label input[type="checkbox"]{width:15px;height:15px;accent-color:var(--primary);}
.form-options a{color:var(--primary);text-decoration:none;font-weight:500;}
.login-error{display:none;background:var(--danger-bg);color:var(--danger);padding:10px 14px;border-radius:var(--radius-sm);font-size:13px;margin-bottom:16px;text-align:center;}
.login-error.show{display:block;}
.btn-login{width:100%;height:44px;font-size:15px;font-weight:600;border-radius:var(--radius-sm);background:var(--primary);color:#fff;border:none;cursor:pointer;box-shadow:0 2px 6px rgba(53,86,216,.2);transition:all .15s;font-family:inherit;}
.btn-login:hover{background:var(--primary-hover);box-shadow:0 4px 12px rgba(53,86,216,.28);}
.btn-login:active{transform:translateY(0);}
.btn-login:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;}
.demo-section{margin-top:28px;}
.divider{position:relative;text-align:center;margin-bottom:20px;}
.divider::before{content:'';position:absolute;left:0;right:0;top:50%;height:1px;background:var(--border);}
.divider span{position:relative;display:inline-block;padding:0 14px;background:#fff;font-size:12px;color:var(--text3);font-weight:500;}
.demo-accounts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;}
.demo-btn{display:flex;flex-direction:column;align-items:center;gap:5px;padding:12px 8px;background:#f9fafb;border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all .15s;font-size:12px;color:var(--text2);font-weight:500;font-family:inherit;}
.demo-btn .demo-icon{font-size:20px;}
.demo-btn:hover{background:#f3f4f6;border-color:#d1d5db;}
.login-footer{text-align:center;margin-top:20px;font-size:11px;color:var(--text3);}

@media(max-width:1024px){
  .login-left{display:none;}
  .login-right{width:100%;}
  .app-shell{flex-direction:column;}
  .sidebar{display:none;}
}