:root {
  --blue:    #5ba4ef;
  --yellow:  #f2cb5f;
  --green:   #67cf92;
  --purple:  #957ce0;
  --red:     #e74c3c;
  --bg:      #f0f2f5;
  --card:    #ffffff;
  --dark:    #2c3e50;
  --grey:    #7f8c8d;
  --border:  #e8ecef;
  --sidebar: #1e2d3d;
  --shadow:  0 2px 8px rgba(0,0,0,.08);
  --radius:  12px;
  --nav-w:   240px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--dark);min-height:100vh}
a{color:inherit;text-decoration:none}

/* ── Layout ─────────────────────────────────────────────────────────────────── */
.app-layout{display:flex;min-height:100vh}

/* ── Sidebar ─────────────────────────────────────────────────────────────────── */
.sidebar{width:var(--nav-w);background:var(--sidebar);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100;overflow-y:auto}
.nav-logo{display:flex;align-items:center;gap:12px;padding:22px 20px;border-bottom:1px solid rgba(255,255,255,.08)}
.nav-logo-icon{font-size:1.9rem}
.nav-logo-title{color:#fff;font-weight:700;font-size:1rem;line-height:1.2}
.nav-logo-sub{color:rgba(255,255,255,.45);font-size:.72rem}
.nav-items{flex:1;padding:14px 12px;display:flex;flex-direction:column;gap:3px}
.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:8px;color:rgba(255,255,255,.68);font-size:.88rem;font-weight:500;transition:all .15s}
.nav-item:hover{background:rgba(255,255,255,.1);color:#fff}
.nav-item.active{background:var(--blue);color:#fff}
.nav-icon{font-size:1rem;width:20px;text-align:center}
.nav-user{display:flex;align-items:center;gap:10px;padding:14px 16px;border-top:1px solid rgba(255,255,255,.08)}
.nav-avatar{width:34px;height:34px;border-radius:50%;object-fit:cover}
.nav-avatar-placeholder{width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.82rem}
.nav-user-info{flex:1;min-width:0}
.nav-user-name{color:#fff;font-size:.82rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-user-role{color:rgba(255,255,255,.45);font-size:.72rem;text-transform:capitalize}
.nav-signout{background:none;border:none;color:rgba(255,255,255,.35);cursor:pointer;font-size:1rem;padding:4px;line-height:1;transition:color .15s}
.nav-signout:hover{color:#fff}

/* ── Main Content ────────────────────────────────────────────────────────────── */
.main-content{margin-left:var(--nav-w);flex:1;padding:32px;min-width:0}

/* ── Page Header ─────────────────────────────────────────────────────────────── */
.page-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:28px;gap:16px;flex-wrap:wrap}
.page-title{font-size:1.55rem;font-weight:700;color:var(--dark);line-height:1.2}
.page-subtitle{font-size:.88rem;color:var(--grey);margin-top:4px}

/* ── Cards ───────────────────────────────────────────────────────────────────── */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.card-title{font-size:.95rem;font-weight:700;color:var(--dark);margin-bottom:16px;display:flex;align-items:center;gap:8px}

/* ── Stats ───────────────────────────────────────────────────────────────────── */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(175px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 22px;display:flex;align-items:center;gap:16px}
.stat-icon{width:46px;height:46px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.35rem;flex-shrink:0}
.stat-value{font-size:1.7rem;font-weight:700;color:var(--dark);line-height:1}
.stat-label{font-size:.75rem;color:var(--grey);margin-top:3px}

/* ── Grids ───────────────────────────────────────────────────────────────────── */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid-wide{display:grid;grid-template-columns:2fr 1fr;gap:20px}
.col{display:flex;flex-direction:column;gap:20px}

/* ── Table ───────────────────────────────────────────────────────────────────── */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.88rem}
th{background:#f8f9fa;padding:11px 16px;text-align:left;font-weight:700;font-size:.75rem;color:var(--grey);text-transform:uppercase;letter-spacing:.05em;border-bottom:2px solid var(--border)}
td{padding:13px 16px;border-bottom:1px solid var(--border);vertical-align:middle}
tr:last-child td{border-bottom:none}
tbody tr:hover td{background:#fafbfc}

/* ── Badges ──────────────────────────────────────────────────────────────────── */
.badge{display:inline-flex;align-items:center;gap:3px;padding:3px 9px;border-radius:20px;font-size:.76rem;font-weight:700}
.badge-pending  {background:#fef9e7;color:#856404}
.badge-approved {background:#e8f8ef;color:#155724}
.badge-rejected {background:#fde8e8;color:#721c24}
.badge-cancelled{background:#f2f3f4;color:#495057}
.badge-sick     {background:#fde8e8;color:#721c24}
.badge-personal {background:#e8f4fd;color:#0c5460}

/* ── Buttons ─────────────────────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:7px;padding:10px 20px;border-radius:8px;font-size:.88rem;font-weight:600;cursor:pointer;border:none;transition:all .15s;font-family:inherit;text-decoration:none}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover:not(:disabled){background:#4a93dd;box-shadow:0 2px 10px rgba(91,164,239,.4)}
.btn-success{background:var(--green);color:#fff}
.btn-success:hover:not(:disabled){background:#56be80}
.btn-danger {background:var(--red);color:#fff}
.btn-danger:hover:not(:disabled){background:#c0392b}
.btn-outline{background:#fff;color:var(--dark);border:1.5px solid var(--border)}
.btn-outline:hover:not(:disabled){border-color:var(--blue);color:var(--blue)}
.btn-ghost{background:transparent;color:var(--grey);padding:8px 12px}
.btn-ghost:hover{background:var(--bg);color:var(--dark)}
.btn-sm{padding:6px 14px;font-size:.8rem}
.btn-xs{padding:4px 10px;font-size:.75rem}

/* ── Forms ───────────────────────────────────────────────────────────────────── */
.form-group{margin-bottom:18px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{display:block;font-size:.83rem;font-weight:600;color:var(--dark);margin-bottom:5px}
input[type=text],input[type=date],input[type=email],select,textarea{width:100%;padding:10px 13px;border:1.5px solid var(--border);border-radius:8px;font-size:.88rem;color:var(--dark);background:#fff;outline:none;transition:border-color .15s;font-family:inherit}
input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(91,164,239,.1)}
textarea{resize:vertical;min-height:72px}
.form-hint{font-size:.75rem;color:var(--grey);margin-top:4px}

/* ── Toggle Options ──────────────────────────────────────────────────────────── */
.toggle-group{display:flex;gap:8px;flex-wrap:wrap}
.toggle-opt{padding:8px 16px;border-radius:8px;border:1.5px solid var(--border);background:#fff;cursor:pointer;font-size:.84rem;font-weight:500;transition:all .15s;font-family:inherit}
.toggle-opt.active{border-color:var(--blue);background:#e8f4fd;color:var(--blue)}

/* ── Calculation Preview ─────────────────────────────────────────────────────── */
.calc-box{background:#f0f7ff;border:1.5px solid #c8e0fb;border-radius:10px;padding:16px 20px;font-size:.86rem}
.calc-row{display:flex;justify-content:space-between;align-items:center;padding:4px 0;color:var(--dark)}
.calc-row.deduct{color:var(--red)}
.calc-row.total{font-weight:700;font-size:.95rem;border-top:1px solid #c8e0fb;margin-top:8px;padding-top:10px}
.calc-holiday-tag{display:inline-block;font-size:.75rem;background:#e8f8ef;color:#155724;padding:2px 8px;border-radius:4px;margin:3px 0}
.calc-warn{background:#fff8e7;border:1.5px solid #f2cb5f;border-radius:8px;padding:10px 14px;font-size:.82rem;color:#856404;margin-top:8px}

/* ── Modals ──────────────────────────────────────────────────────────────────── */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:1000;align-items:center;justify-content:center;padding:20px}
.modal{background:#fff;border-radius:16px;width:100%;max-width:520px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.modal-header{padding:22px 24px 0;display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.modal-title{font-size:1.1rem;font-weight:700;color:var(--dark)}
.modal-close{background:none;border:none;font-size:1.3rem;cursor:pointer;color:var(--grey);padding:2px;line-height:1}
.modal-body{padding:18px 24px}
.modal-footer{padding:0 24px 22px;display:flex;gap:12px;justify-content:flex-end}

/* ── Tabs ────────────────────────────────────────────────────────────────────── */
.tabs{display:flex;gap:4px;border-bottom:2px solid var(--border);margin-bottom:22px}
.tab-btn{padding:10px 18px;border:none;background:none;font-size:.88rem;font-weight:600;color:var(--grey);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .15s;font-family:inherit}
.tab-btn.active{color:var(--blue);border-bottom-color:var(--blue)}

/* ── Auth Overlay ────────────────────────────────────────────────────────────── */
#auth-overlay{position:fixed;inset:0;background:linear-gradient(135deg,#1e2d3d 0%,#2c3e50 100%);z-index:9000;display:none;align-items:center;justify-content:center}
.auth-box{background:#fff;border-radius:20px;padding:48px 40px;text-align:center;max-width:380px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.auth-logo{font-size:3rem;margin-bottom:14px}
.auth-title{font-size:1.45rem;font-weight:700;color:var(--dark);margin-bottom:6px}
.auth-subtitle{font-size:.88rem;color:var(--grey);margin-bottom:28px}
.btn-google{display:inline-flex;align-items:center;gap:12px;padding:13px 28px;background:#fff;border:2px solid var(--border);border-radius:10px;cursor:pointer;font-size:.9rem;font-weight:600;color:var(--dark);transition:all .2s;box-shadow:0 2px 8px rgba(0,0,0,.08);width:100%;justify-content:center;font-family:inherit}
.btn-google:hover{border-color:var(--blue);box-shadow:0 4px 16px rgba(91,164,239,.2)}

/* ── Calendar Grid ───────────────────────────────────────────────────────────── */
.cal-nav{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.cal-month-label{font-size:1.1rem;font-weight:700;color:var(--dark)}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:3px}
.cal-dow{text-align:center;font-size:.72rem;font-weight:700;color:var(--grey);padding:8px 0;text-transform:uppercase}
.cal-cell{min-height:78px;border-radius:8px;padding:6px;background:#fff;cursor:default}
.cal-cell.today{background:#e8f4fd;outline:2px solid var(--blue)}
.cal-cell.weekend{background:#fafbfc}
.cal-cell.other-month{opacity:.3}
.cal-cell.has-holiday{background:#f0fdf4}
.cal-date{font-size:.78rem;font-weight:600;color:var(--dark);margin-bottom:3px}
.cal-event{font-size:.68rem;padding:2px 5px;border-radius:4px;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500}
.cal-holiday-dot{font-size:.68rem;color:#155724;background:#e8f8ef;padding:2px 5px;border-radius:4px;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ── Filter Bar ──────────────────────────────────────────────────────────────── */
.filter-bar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:18px}
.filter-bar select,.filter-bar input{width:auto;min-width:130px}

/* ── Empty / Loading ─────────────────────────────────────────────────────────── */
.empty{text-align:center;padding:40px 20px;color:var(--grey)}
.empty-icon{font-size:2.5rem;margin-bottom:10px}
.empty-text{font-size:.95rem;font-weight:500;margin-bottom:4px}
.empty-sub{font-size:.82rem}
.loading{display:flex;align-items:center;justify-content:center;padding:40px;color:var(--grey);font-size:.88rem;gap:10px}
@keyframes spin{to{transform:rotate(360deg)}}
.spinner{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--blue);border-radius:50%;animation:spin .7s linear infinite;flex-shrink:0}

/* ── Toast ───────────────────────────────────────────────────────────────────── */
@keyframes slideIn{from{transform:translateX(110%);opacity:0}to{transform:translateX(0);opacity:1}}

/* ── Misc ────────────────────────────────────────────────────────────────────── */
.divider{border:none;border-top:1px solid var(--border);margin:16px 0}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:#ccc;border-radius:3px}

/* ── Responsive ──────────────────────────────────────────────────────────────── */
@media(max-width:768px){
  :root{--nav-w:58px}
  .nav-logo-title,.nav-logo-sub,.nav-item span:last-child,.nav-user-info,.nav-signout{display:none}
  .nav-logo{justify-content:center}
  .nav-item{justify-content:center;padding:12px}
  .nav-user{justify-content:center}
  .main-content{padding:18px 14px}
  .form-row{grid-template-columns:1fr}
  .grid-2,.grid-wide{grid-template-columns:1fr}
}