@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #1c2230;
  --border: #30363d;
  --accent: #00d4aa;
  --accent-dim: rgba(0,212,170,0.12);
  --accent2: #7c6af7;
  --text: #e6edf3;
  --text-muted: #7d8590;
  --red: #f85149;
  --yellow: #d29922;
  --green: #3fb950;
  --radius: 12px;
  --mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Be Vietnam Pro', sans-serif;
  min-height: 100vh;
  font-size: 14px;
}

/* LAYOUT */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
}

.logo {
  padding: 0 20px 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.logo-icon { font-size: 22px; margin-bottom: 4px; }
.logo-title { font-weight: 700; font-size: 15px; color: var(--accent); line-height: 1.2; }
.logo-sub { font-size: 11px; color: var(--text-muted); }

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.15s;
  font-size: 13.5px;
  border-left: 3px solid transparent;
}
.nav-item:hover { color: var(--text); background: var(--accent-dim); }
.nav-item.active { color: var(--accent); background: var(--accent-dim); border-left-color: var(--accent); }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }

.main {
  margin-left: 220px;
  flex: 1;
  padding: 32px;
  max-width: calc(100vw - 220px);
}

.page { display: none; }
.page.active { display: block; }

/* HEADER */
.page-header { margin-bottom: 28px; }
.page-header h1 { font-size: 22px; font-weight: 700; color: var(--text); }
.page-header p { color: var(--text-muted); margin-top: 4px; font-size: 13px; }

/* CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card-title {
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* STATS GRID */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--accent);
}

.stat-card.purple::before { background: var(--accent2); }
.stat-card.yellow::before { background: var(--yellow); }
.stat-card.red::before { background: var(--red); }

.stat-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }
.stat-value { font-size: 28px; font-weight: 700; font-family: var(--mono); color: var(--text); line-height: 1; }
.stat-value.accent { color: var(--accent); }
.stat-value.purple { color: var(--accent2); }
.stat-sub { font-size: 11px; color: var(--text-muted); margin-top: 6px; }

/* GRID UTILS */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; margin-bottom: 16px; }

/* FORMS */
label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 6px; font-weight: 500; }
input, select, textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 13.5px;
  outline: none;
  transition: border 0.15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
input[type=number] { font-family: var(--mono); }
.form-group { margin-bottom: 14px; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px;
  border-radius: 8px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}
.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover { filter: brightness(1.1); }
.btn-secondary { background: var(--surface2); border: 1px solid var(--border); color: var(--text); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: rgba(248,81,73,0.15); border: 1px solid var(--red); color: var(--red); }
.btn-danger:hover { background: rgba(248,81,73,0.25); }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* TABLES */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
thead { background: var(--surface2); }
th { padding: 10px 14px; text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); font-weight: 600; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 11px 14px; border-bottom: 1px solid var(--border); font-size: 13.5px; color: var(--text); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

/* BADGES */
.badge { display: inline-flex; align-items: center; padding: 3px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; letter-spacing: 0.03em; }
.badge-morning { background: rgba(210,153,34,0.15); color: var(--yellow); }
.badge-afternoon { background: rgba(0,212,170,0.12); color: var(--accent); }
.badge-night { background: rgba(124,106,247,0.15); color: var(--accent2); }
.badge-off { background: rgba(248,81,73,0.12); color: var(--red); }
.badge-wfh { background: rgba(63,185,80,0.12); color: var(--green); }

/* UPLOAD ZONE */
.upload-zone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 40px; text-align: center; cursor: pointer; transition: all 0.2s; background: var(--bg); }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--accent); background: var(--accent-dim); }
.upload-icon { font-size: 40px; margin-bottom: 10px; }
.upload-text { color: var(--text-muted); font-size: 14px; }
.upload-text strong { color: var(--accent); }

/* CALENDAR */
.cal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cal-title { font-size: 16px; font-weight: 700; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-day-label { text-align: center; font-size: 11px; color: var(--text-muted); font-weight: 600; padding: 4px; text-transform: uppercase; }
.cal-day { aspect-ratio: 1; border-radius: 8px; display: flex; flex-direction: column; align-items: center; justify-content: center; font-size: 12px; cursor: default; border: 1px solid transparent; transition: all 0.1s; position: relative; min-height: 44px; gap: 2px; }
.cal-day.empty { background: transparent; }
.cal-day.has-shift { cursor: pointer; }
.cal-day.has-shift:hover { border-color: var(--accent); }
.cal-day .day-num { font-weight: 600; font-size: 13px; }
.cal-day .shift-dot { font-size: 9px; font-weight: 700; padding: 1px 5px; border-radius: 4px; line-height: 1.4; }

/* PROGRESS BAR */
.progress { height: 6px; background: var(--border); border-radius: 99px; overflow: hidden; margin-top: 8px; }
.progress-fill { height: 100%; border-radius: 99px; background: var(--accent); transition: width 0.4s ease; }
.progress-fill.purple { background: var(--accent2); }
.progress-fill.yellow { background: var(--yellow); }

/* ALERTS */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 13px; margin-bottom: 16px; display: flex; align-items: flex-start; gap: 10px; }
.alert-info { background: rgba(0,212,170,0.1); border: 1px solid rgba(0,212,170,0.3); color: var(--accent); }
.alert-warn { background: rgba(210,153,34,0.1); border: 1px solid rgba(210,153,34,0.3); color: var(--yellow); }
.alert-error { background: rgba(248,81,73,0.1); border: 1px solid rgba(248,81,73,0.3); color: var(--red); }

/* TABS */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab { padding: 8px 16px; cursor: pointer; font-size: 13.5px; color: var(--text-muted); border-bottom: 2px solid transparent; margin-bottom: -1px; transition: all 0.15s; }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* TOAST */
#toast { position: fixed; bottom: 24px; right: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 12px 20px; font-size: 13px; z-index: 9999; display: none; box-shadow: 0 8px 24px rgba(0,0,0,0.4); max-width: 320px; transition: all 0.2s; }

/* LOGS */
.log-list { max-height: 200px; overflow-y: auto; }
.log-item { padding: 6px 0; border-bottom: 1px solid var(--border); font-family: var(--mono); font-size: 12px; display: flex; gap: 10px; }
.log-time { color: var(--text-muted); white-space: nowrap; }
.log-msg { color: var(--text); }
.log-ok { color: var(--green); }
.log-err { color: var(--red); }

/* UTILS */
.col-flex { display: flex; align-items: center; gap: 8px; }
.flex-end { display: flex; justify-content: flex-end; gap: 8px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.mt8 { margin-top: 8px; }
.mt16 { margin-top: 16px; }
.mb16 { margin-bottom: 16px; }
.text-muted { color: var(--text-muted); font-size: 12px; }
.text-accent { color: var(--accent); }
.text-mono { font-family: var(--mono); }
.empty-state { text-align: center; padding: 48px 20px; color: var(--text-muted); }
.empty-state .es-icon { font-size: 36px; margin-bottom: 12px; }
input[type=file] { display: none; }

@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar .logo-title, .sidebar .logo-sub, .nav-item span { display: none; }
  .main { margin-left: 60px; padding: 20px 16px; max-width: calc(100vw - 60px); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}