@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg-primary:#0a0e27;--bg-secondary:#111638;
  --bg-card:rgba(255,255,255,0.04);--bg-card-hover:rgba(255,255,255,0.08);
  --glass:rgba(255,255,255,0.06);--glass-border:rgba(255,255,255,0.1);
  --accent:#7c3aed;--accent-light:#a78bfa;
  --cyan:#06b6d4;--cyan-light:#22d3ee;
  --green:#10b981;--red:#ef4444;--orange:#f59e0b;--pink:#ec4899;
  --text:#e2e8f0;--text-dim:#94a3b8;--text-muted:#64748b;
  --radius:16px;--radius-sm:10px;
  --shadow:0 8px 32px rgba(0,0,0,0.3);
  --transition:0.3s cubic-bezier(0.4,0,0.2,1);
}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',sans-serif;background:var(--bg-primary);color:var(--text);
  min-height:100vh;overflow-x:hidden;
  background-image:
    radial-gradient(ellipse at 20% 50%,rgba(124,58,237,0.08) 0%,transparent 50%),
    radial-gradient(ellipse at 80% 20%,rgba(6,182,212,0.06) 0%,transparent 50%),
    radial-gradient(ellipse at 50% 80%,rgba(236,72,153,0.05) 0%,transparent 50%);
}

/* SIDEBAR */
.sidebar{position:fixed;top:0;left:0;width:260px;height:100vh;background:var(--bg-secondary);border-right:1px solid var(--glass-border);padding:24px 16px;display:flex;flex-direction:column;z-index:100}
.logo{display:flex;align-items:center;gap:12px;padding:8px 12px;margin-bottom:32px}
.logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--accent),var(--cyan));border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px}
.logo-text{font-size:18px;font-weight:700;background:linear-gradient(135deg,var(--accent-light),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{list-style:none;flex:1}
.nav-links li{margin-bottom:4px}
.nav-links a{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius-sm);color:var(--text-dim);text-decoration:none;font-size:14px;font-weight:500;transition:var(--transition)}
.nav-links a:hover{background:var(--bg-card-hover);color:var(--text)}
.nav-links a.active{background:linear-gradient(135deg,rgba(124,58,237,0.2),rgba(6,182,212,0.1));color:var(--accent-light);border:1px solid rgba(124,58,237,0.3)}
.nav-links a .icon{font-size:18px;width:24px;text-align:center}
.alert-count{background:var(--red);color:white;font-size:11px;font-weight:700;padding:2px 7px;border-radius:10px;margin-left:auto}
.sidebar-footer{padding:12px;border-top:1px solid var(--glass-border)}
.semester-badge{background:linear-gradient(135deg,rgba(124,58,237,0.15),rgba(6,182,212,0.1));border:1px solid rgba(124,58,237,0.2);border-radius:var(--radius-sm);padding:10px 14px;text-align:center;font-size:13px;font-weight:600;color:var(--accent-light)}

/* MAIN */
.main{margin-left:260px;padding:32px;min-height:100vh}
.page{display:none;animation:fadeIn 0.4s ease}.page.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.page-header{margin-bottom:28px}
.page-header h1{font-size:28px;font-weight:700;margin-bottom:4px}
.page-header p{color:var(--text-dim);font-size:14px}

/* STAT CARDS */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:32px}
.stat-card{background:var(--glass);backdrop-filter:blur(16px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:24px;transition:var(--transition);position:relative;overflow:hidden}
.stat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--radius) var(--radius) 0 0}
.stat-card.purple::before{background:linear-gradient(90deg,var(--accent),var(--accent-light))}
.stat-card.cyan::before{background:linear-gradient(90deg,var(--cyan),var(--cyan-light))}
.stat-card.green::before{background:linear-gradient(90deg,var(--green),#34d399)}
.stat-card.orange::before{background:linear-gradient(90deg,var(--orange),#fbbf24)}
.stat-card.red::before{background:linear-gradient(90deg,var(--red),#f87171)}
.stat-card:hover{transform:translateY(-4px);background:var(--bg-card-hover);box-shadow:var(--shadow)}
.stat-card .stat-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px}
.stat-card.purple .stat-icon{background:rgba(124,58,237,0.15)}
.stat-card.cyan .stat-icon{background:rgba(6,182,212,0.15)}
.stat-card.green .stat-icon{background:rgba(16,185,129,0.15)}
.stat-card.orange .stat-icon{background:rgba(245,158,11,0.15)}
.stat-card.red .stat-icon{background:rgba(239,68,68,0.15)}
.stat-card .stat-value{font-size:32px;font-weight:800;margin-bottom:4px}
.stat-card .stat-label{color:var(--text-dim);font-size:13px;font-weight:500}

/* GLASS CARD */
.glass-card{background:var(--glass);backdrop-filter:blur(16px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:24px;margin-bottom:24px}
.glass-card h3{font-size:16px;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:8px}

/* CHARTS */
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:32px}
.bar-chart{display:flex;flex-direction:column;gap:12px}
.bar-row{display:flex;align-items:center;gap:12px}
.bar-label{width:120px;font-size:13px;color:var(--text-dim);text-align:right;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bar-track{flex:1;height:28px;background:rgba(255,255,255,0.04);border-radius:6px;overflow:hidden;position:relative}
.bar-fill{height:100%;border-radius:6px;transition:width 1s cubic-bezier(0.4,0,0.2,1);display:flex;align-items:center;justify-content:flex-end;padding-right:8px;font-size:11px;font-weight:600;color:white;min-width:fit-content}
.bar-fill.safe{background:linear-gradient(90deg,var(--green),#34d399)}
.bar-fill.warning{background:linear-gradient(90deg,var(--orange),#fbbf24)}
.bar-fill.danger{background:linear-gradient(90deg,var(--red),#f87171)}
.bar-fill.accent{background:linear-gradient(90deg,var(--accent),var(--cyan))}

/* STUDENT CARDS */
.student-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;margin-bottom:28px}
.student-card{background:var(--glass);backdrop-filter:blur(16px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:24px;cursor:pointer;transition:var(--transition);position:relative;overflow:hidden}
.student-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--cyan))}
.student-card:hover{transform:translateY(-4px);background:var(--bg-card-hover);box-shadow:var(--shadow)}
.student-card .sc-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:16px}
.student-card .sc-avatar{width:48px;height:48px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--cyan));display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;color:white}
.student-card .sc-overall{text-align:right}
.student-card .sc-overall .pct{font-size:24px;font-weight:800}
.student-card .sc-overall .lbl{font-size:11px;color:var(--text-dim)}
.student-card .sc-name{font-size:17px;font-weight:700;margin-bottom:2px}
.student-card .sc-reg{font-size:12px;color:var(--text-dim);margin-bottom:12px}
.student-card .sc-meta{display:flex;gap:8px;flex-wrap:wrap}
.sc-tag{padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600;background:rgba(124,58,237,0.12);color:var(--accent-light)}
.sc-tag.warn{background:rgba(239,68,68,0.12);color:var(--red)}

/* DETAIL VIEW */
.detail-back{background:none;border:none;color:var(--accent-light);font-family:'Inter';font-size:14px;cursor:pointer;margin-bottom:20px;display:flex;align-items:center;gap:6px;font-weight:500}
.detail-back:hover{text-decoration:underline}
.detail-info{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-bottom:24px}
.info-item{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius-sm);padding:14px}
.info-item .info-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.05em;margin-bottom:4px}
.info-item .info-value{font-size:15px;font-weight:600}

/* SUBJECT TABLE */
.subject-table{width:100%;border-collapse:collapse;margin-top:8px}
.subject-table th{text-align:left;padding:12px 14px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-muted);border-bottom:1px solid var(--glass-border)}
.subject-table td{padding:14px;font-size:14px;border-bottom:1px solid rgba(255,255,255,0.03)}
.subject-table tbody tr{transition:var(--transition)}
.subject-table tbody tr:hover{background:var(--bg-card-hover)}
.subject-table .code{color:var(--cyan);font-weight:600;font-size:12px}
.att-badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:700}
.att-badge.safe{background:rgba(16,185,129,0.15);color:var(--green)}
.att-badge.danger{background:rgba(239,68,68,0.15);color:var(--red)}
.att-badge.warning{background:rgba(245,158,11,0.15);color:var(--orange)}

/* ALERT CARDS */
.alert-card{background:var(--glass);border:1px solid rgba(239,68,68,0.2);border-left:4px solid var(--red);border-radius:var(--radius-sm);padding:18px 20px;margin-bottom:12px;display:flex;align-items:center;gap:16px;animation:fadeIn 0.3s ease}
.alert-card .alert-icon{font-size:28px;flex-shrink:0}
.alert-card .alert-body{flex:1}
.alert-card .alert-title{font-size:14px;font-weight:700;margin-bottom:2px}
.alert-card .alert-desc{font-size:13px;color:var(--text-dim)}
.alert-card .alert-pct{font-size:22px;font-weight:800;color:var(--red);flex-shrink:0}
.alert-card.warning-card{border-color:rgba(245,158,11,0.2);border-left-color:var(--orange)}
.alert-card.warning-card .alert-pct{color:var(--orange)}
.no-alerts{text-align:center;padding:60px 20px;color:var(--text-dim)}
.no-alerts .na-icon{font-size:48px;margin-bottom:16px}
.no-alerts h3{font-size:18px;color:var(--text);margin-bottom:8px}

/* AI CHAT */
.ai-container{max-width:800px;margin:0 auto}
.ai-header{text-align:center;margin-bottom:32px}
.ai-header .ai-logo{width:64px;height:64px;margin:0 auto 16px;background:linear-gradient(135deg,var(--accent),var(--cyan));border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:28px;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(124,58,237,0.4)}50%{box-shadow:0 0 0 12px rgba(124,58,237,0)}}
.ai-header h2{font-size:22px;margin-bottom:6px}
.ai-header p{color:var(--text-dim);font-size:14px}
.suggestions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:24px}
.suggestion-chip{padding:12px 16px;border-radius:var(--radius-sm);background:var(--glass);border:1px solid var(--glass-border);color:var(--text-dim);font-size:13px;cursor:pointer;transition:var(--transition);text-align:left;font-family:'Inter'}
.suggestion-chip:hover{background:var(--bg-card-hover);color:var(--text);border-color:var(--accent)}
.chat-messages{display:flex;flex-direction:column;gap:16px;margin-bottom:20px;max-height:50vh;overflow-y:auto;padding-right:8px}
.chat-messages::-webkit-scrollbar{width:4px}
.chat-messages::-webkit-scrollbar-track{background:transparent}
.chat-messages::-webkit-scrollbar-thumb{background:var(--glass-border);border-radius:4px}
.chat-msg{padding:14px 18px;border-radius:var(--radius-sm);font-size:14px;line-height:1.6;animation:fadeIn 0.3s ease}
.chat-msg.user{background:linear-gradient(135deg,rgba(124,58,237,0.2),rgba(124,58,237,0.1));border:1px solid rgba(124,58,237,0.2);align-self:flex-end;max-width:80%}
.chat-msg.ai{background:var(--glass);border:1px solid var(--glass-border);align-self:flex-start;max-width:90%}
.chat-msg .result-table{width:100%;border-collapse:collapse;margin-top:12px;font-size:13px}
.chat-msg .result-table th{text-align:left;padding:8px;border-bottom:1px solid var(--glass-border);color:var(--text-dim);font-size:11px;text-transform:uppercase}
.chat-msg .result-table td{padding:8px;border-bottom:1px solid rgba(255,255,255,0.03)}
.chat-input-wrap{display:flex;gap:12px;background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius);padding:8px}
.chat-input-wrap input{flex:1;background:none;border:none;outline:none;color:var(--text);font-family:'Inter';font-size:14px;padding:8px 12px}
.chat-input-wrap input::placeholder{color:var(--text-muted)}
.chat-input-wrap button{padding:10px 20px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--accent),var(--cyan));border:none;color:white;font-family:'Inter';font-weight:600;cursor:pointer;transition:var(--transition)}
.chat-input-wrap button:hover{opacity:0.9;transform:scale(1.02)}

/* TOAST */
.toast-container{position:fixed;top:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:8px}
.toast{padding:14px 20px;border-radius:var(--radius-sm);background:var(--bg-secondary);border:1px solid var(--glass-border);color:var(--text);font-size:14px;animation:slideInRight 0.3s ease,fadeOut 0.3s ease 2.7s;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow)}
.toast.success{border-left:3px solid var(--green)}
.toast.error{border-left:3px solid var(--red)}
.toast.info{border-left:3px solid var(--cyan)}
.toast.warning{border-left:3px solid var(--orange)}
@keyframes slideInRight{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
@keyframes fadeOut{from{opacity:1}to{opacity:0}}

.typing-dots{display:inline-flex;gap:4px;padding:4px 0}
.typing-dots span{width:6px;height:6px;border-radius:50%;background:var(--accent-light);animation:bounce 1.4s infinite ease-in-out}
.typing-dots span:nth-child(2){animation-delay:0.2s}
.typing-dots span:nth-child(3){animation-delay:0.4s}
@keyframes bounce{0%,80%,100%{transform:scale(0)}40%{transform:scale(1)}}

/* RISK LIST */
.risk-item{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--glass-border);font-size:13px}
.risk-item:last-child{border:none}
.risk-item .ri-name{flex:1}
.risk-item .ri-student{color:var(--text-dim);width:100px}
.risk-item .ri-pct{font-weight:700;color:var(--red)}

@media(max-width:768px){
  .sidebar{display:none}.main{margin-left:0;padding:20px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .chart-grid{grid-template-columns:1fr}
  .suggestions{grid-template-columns:1fr}
  .student-cards{grid-template-columns:1fr}
  .detail-info{grid-template-columns:1fr 1fr}
}