*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0f0e0c; --surface: #1a1916; --surface2: #252420; --surface3: #2e2c28;
  --border: #3a3830; --accent: #e8c97d; --accent2: #c5a24e;
  --text: #f0ece0; --text2: #9a9485; --text3: #6a6458;
  --danger: #e05c5c; --success: #6db88a; --info: #6b9fd4; --radius: 10px;
}
body { font-family: 'DM Mono', monospace; background: var(--bg); color: var(--text); min-height: 100vh; font-size: 14px; }

.app { display: flex; min-height: 100vh; }
.sidebar { width: 240px; min-width: 240px; background: var(--surface); border-right: 1px solid var(--border); display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.main { flex: 1; padding: 40px; overflow-y: auto; max-width: 900px; }

.sidebar-logo { padding: 28px 24px 20px; border-bottom: 1px solid var(--border); }
.sidebar-logo h1 { font-family: 'DM Serif Display', serif; font-size: 18px; color: var(--accent); line-height: 1.2; }
.sidebar-logo span { color: var(--text2); font-size: 11px; display: block; margin-top: 4px; }
.sidebar-nav { padding: 16px 12px; flex: 1; }
.nav-label { font-size: 10px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text3); padding: 0 12px; margin: 16px 0 6px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 7px; cursor: pointer; transition: all 0.15s; color: var(--text2); font-size: 13px; border: none; background: none; width: 100%; text-align: left; }
.nav-item:hover { background: var(--surface2); color: var(--text); }
.nav-item.active { background: var(--surface3); color: var(--accent); }
.nav-item svg { flex-shrink: 0; opacity: 0.7; }
.nav-item.active svg { opacity: 1; }
.module-nav-item { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; border-radius: 7px; cursor: pointer; transition: all 0.15s; color: var(--text2); font-size: 12px; border: none; background: none; width: 100%; text-align: left; }
.module-nav-item:hover { background: var(--surface2); color: var(--text); }
.module-nav-item.active { background: var(--surface3); color: var(--accent); }
.module-nav-item .mod-avg { font-size: 11px; color: var(--text3); background: var(--surface2); padding: 1px 6px; border-radius: 4px; }
.module-nav-item.active .mod-avg { background: var(--bg); color: var(--accent2); }

.db-status { display: flex; align-items: center; gap: 6px; padding: 10px 16px; margin: 8px 12px; border-radius: 7px; font-size: 11px; cursor: pointer; border: 1px solid var(--border); background: var(--surface2); color: var(--text2); transition: all 0.15s; }
.db-status:hover { border-color: var(--accent2); color: var(--text); }
.db-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.db-dot.connected { background: var(--success); box-shadow: 0 0 6px var(--success); }
.db-dot.disconnected { background: var(--danger); }
.db-dot.loading { background: var(--accent); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:0.3} }

.page-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 32px; }
.page-title { font-family: 'DM Serif Display', serif; font-size: 28px; color: var(--text); }
.page-subtitle { color: var(--text2); font-size: 12px; margin-top: 4px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.card-title { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); margin-bottom: 14px; font-weight: 500; }

.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 24px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); }
.stat-value { font-size: 26px; font-weight: 300; color: var(--text); margin: 4px 0 2px; line-height: 1; }
.stat-sub { font-size: 11px; color: var(--text2); }
.stat-card.accent { border-color: var(--accent2); }
.stat-card.accent .stat-value { color: var(--accent); }
.stat-card.danger .stat-value { color: var(--danger); }

.progress-bar { height: 6px; background: var(--surface3); border-radius: 3px; overflow: hidden; margin: 8px 0 2px; }
.progress-fill { height: 100%; border-radius: 3px; transition: width 0.4s ease; background: linear-gradient(90deg, var(--accent2), var(--accent)); }
.progress-fill.danger { background: linear-gradient(90deg, #c04444, var(--danger)); }

.grade-badge { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 8px; font-size: 14px; font-weight: 500; }
.grade-high { background: rgba(109,184,138,0.15); color: var(--success); border: 1px solid rgba(109,184,138,0.3); }
.grade-mid  { background: rgba(232,201,125,0.12); color: var(--accent);  border: 1px solid rgba(232,201,125,0.25); }
.grade-low  { background: rgba(224,92,92,0.12);  color: var(--danger);  border: 1px solid rgba(224,92,92,0.25); }
.grades-list { display: flex; flex-direction: column; gap: 8px; }
.grade-row { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--surface2); border-radius: 8px; border: 1px solid var(--border); }
.grade-row-info { flex: 1; }
.grade-row-desc { font-size: 12px; color: var(--text); }
.grade-row-date { font-size: 10px; color: var(--text3); }
.grade-delete { background: none; border: none; cursor: pointer; color: var(--text3); padding: 4px; border-radius: 4px; transition: color 0.15s; }
.grade-delete:hover { color: var(--danger); }

.absence-row { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--surface2); border-radius: 8px; border: 1px solid var(--border); margin-bottom: 8px; }
.absence-type { font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em; padding: 3px 8px; border-radius: 4px; background: rgba(107,159,212,0.12); color: var(--info); border: 1px solid rgba(107,159,212,0.2); min-width: 90px; text-align: center; }

.form-row { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); }
input[type="text"],input[type="number"],input[type="date"],input[type="password"],select {
  background: var(--surface3); border: 1px solid var(--border); color: var(--text);
  padding: 8px 12px; border-radius: 7px; font-family: 'DM Mono', monospace; font-size: 13px; outline: none; transition: border-color 0.15s;
}
input:focus,select:focus { border-color: var(--accent2); }
input[type="number"] { width: 80px; }
select { min-width: 150px; cursor: pointer; }
.btn { padding: 9px 16px; border-radius: 7px; border: none; cursor: pointer; font-family: 'DM Mono', monospace; font-size: 12px; font-weight: 500; transition: all 0.15s; letter-spacing: 0.02em; }
.btn-primary { background: var(--accent); color: #1a1812; }
.btn-primary:hover { background: #f0d88a; }
.btn-ghost { background: transparent; color: var(--text2); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--surface2); color: var(--text); }
.btn-danger { background: rgba(224,92,92,0.15); color: var(--danger); border: 1px solid rgba(224,92,92,0.3); }
.btn-danger:hover { background: rgba(224,92,92,0.25); }
.btn-sm { padding: 6px 12px; font-size: 11px; }
.btn:disabled { opacity:0.45; cursor:not-allowed; }

.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); display: flex; align-items: center; justify-content: center; z-index: 100; backdrop-filter: blur(4px); }
.modal { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 28px; width: 480px; max-width: 95vw; max-height: 90vh; overflow-y: auto; }
.modal-title { font-family: 'DM Serif Display', serif; font-size: 20px; margin-bottom: 6px; color: var(--text); }
.modal-subtitle { color: var(--text3); font-size: 12px; margin-bottom: 20px; line-height: 1.6; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

/* SETUP */
.setup-screen { position: fixed; inset: 0; background: var(--bg); display: flex; align-items: center; justify-content: center; z-index: 200; padding: 20px; overflow-y: auto; }
.setup-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 36px; width: 540px; max-width: 100%; }
.setup-logo { font-family: 'DM Serif Display', serif; font-size: 26px; color: var(--accent); margin-bottom: 6px; }
.setup-desc { color: var(--text3); font-size: 12px; line-height: 1.7; margin-bottom: 28px; }
.setup-step { display: flex; gap: 12px; margin-bottom: 16px; }
.setup-step-num { width: 22px; height: 22px; border-radius: 50%; background: var(--accent2); color: #1a1812; font-size: 11px; font-weight: 600; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; }
.setup-step-text { font-size: 12px; color: var(--text2); line-height: 1.7; }
.setup-step-text strong { color: var(--text); }
.setup-step-text a { color: var(--accent2); text-decoration: none; }
.setup-step-text a:hover { text-decoration: underline; }
.setup-divider { height: 1px; background: var(--border); margin: 24px 0; }
.setup-field { margin-bottom: 12px; }
.setup-field label { display: block; font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); margin-bottom: 5px; }
.setup-field input { width: 100%; }
.setup-error { background: rgba(224,92,92,0.1); border: 1px solid rgba(224,92,92,0.3); color: var(--danger); padding: 10px 14px; border-radius: 7px; font-size: 12px; margin-bottom: 14px; }
.setup-skip { font-size: 11px; color: var(--text3); text-align: center; margin-top: 12px; cursor: pointer; }
.setup-skip:hover { color: var(--text2); text-decoration: underline; }

.empty-state { text-align: center; padding: 48px 24px; color: var(--text3); }
.empty-state p { font-size: 12px; }
.avg-display { display: inline-flex; align-items: baseline; gap: 4px; }
.avg-display .big { font-size: 32px; font-weight: 300; }
.avg-display .small { font-size: 14px; color: var(--text3); }
.toast { position: fixed; bottom: 24px; right: 24px; background: var(--surface3); border: 1px solid var(--border); color: var(--text); padding: 12px 20px; border-radius: 8px; font-size: 12px; z-index: 999; animation: slideUp 0.2s ease; max-width: 320px; }
@keyframes slideUp { from{transform:translateY(20px);opacity:0} to{transform:translateY(0);opacity:1} }
.spin { display:inline-block; width:12px; height:12px; border:2px solid rgba(255,255,255,0.2); border-top-color:currentColor; border-radius:50%; animation:spinA 0.7s linear infinite; vertical-align:middle; margin-right:6px; }
@keyframes spinA { to{transform:rotate(360deg)} }
input[type="date"]::-webkit-calendar-picker-indicator { filter: invert(0.6); cursor: pointer; }
@media(max-width:768px){.app{flex-direction:column}.sidebar{width:100%;height:auto;position:static}.main{padding:20px}.stats-row{grid-template-columns:repeat(2,1fr)}}