:root{
	--arpa-red:#e6242b;
	--arpa-red-dark:#c81e24;
	--arpa-black:#15161a;
	--arpa-dark:#1e2025;
	--arpa-gray:#6b7280;
	--arpa-light:#f5f6f8;
	--arpa-border:#e8e9ec;
	--arpa-green:#22a559;
	--arpa-gold:#f2a900;
	--arpa-blue:#2f6fed;
	--arpa-radius:12px;
}

/* ---------- Buttons ---------- */
.arpa-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:8px;font-weight:600;font-size:14px;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:.15s ease;}
.arpa-btn-primary{background:var(--arpa-red);color:#fff;}
.arpa-btn-primary:hover{background:var(--arpa-red-dark);color:#fff;}
.arpa-btn-outline{background:#fff;color:var(--arpa-black);border-color:var(--arpa-border);}
.arpa-btn-outline:hover{border-color:var(--arpa-red);color:var(--arpa-red);}
.arpa-btn-block{width:100%;}
.arpa-btn-sm{padding:6px 14px;font-size:13px;}
.arpa-btn:disabled{opacity:.6;cursor:not-allowed;}

/* ---------- Forms ---------- */
.arpa-form label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--arpa-black);}
.arpa-form input[type=text],.arpa-form input[type=email],.arpa-form input[type=password]{width:100%;padding:11px 14px;border:1px solid var(--arpa-border);border-radius:8px;margin-bottom:14px;font-size:14px;}
.arpa-form-row{display:flex;justify-content:space-between;align-items:center;font-size:13px;margin-bottom:16px;}
.arpa-error{background:#fdeceb;color:var(--arpa-red);padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:14px;}
.arpa-success{background:#eaf7ef;color:var(--arpa-green);padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:14px;}
.arpa-notice{background:var(--arpa-light);color:var(--arpa-gray);padding:14px;border-radius:8px;font-size:14px;}

/* ---------- Badges ---------- */
.arpa-badge{display:inline-block;background:var(--arpa-light);color:var(--arpa-black);padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;}

/* ---------- Quiz ---------- */
.arpa-quiz-layout{display:grid;grid-template-columns:1fr 280px;gap:24px;align-items:start;}
.arpa-quiz-main{background:#fff;border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);padding:24px;}
.arpa-quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;border-bottom:1px solid var(--arpa-border);padding-bottom:16px;}
.arpa-timer{font-weight:700;color:var(--arpa-red);}
.arpa-question h3{font-size:18px;margin-bottom:20px;line-height:1.5;}
.arpa-options{display:flex;flex-direction:column;gap:10px;}
.arpa-option{display:flex;align-items:center;gap:12px;padding:14px 16px;border:1px solid var(--arpa-border);border-radius:10px;cursor:pointer;transition:.15s;}
.arpa-option:hover{border-color:var(--arpa-red);}
.arpa-option input:checked ~ .arpa-option-letter,.arpa-option:has(input:checked){border-color:var(--arpa-red);background:#fdeceb;}
.arpa-option-letter{width:26px;height:26px;border-radius:50%;background:var(--arpa-light);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;}
.arpa-option input{margin:0;}
.arpa-quiz-nav{display:flex;gap:10px;margin-top:24px;flex-wrap:wrap;}
.arpa-quiz-sidebar{background:#fff;border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);padding:20px;}
.arpa-quiz-sidebar h4{margin-bottom:14px;font-size:15px;}
.arpa-palette{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-bottom:16px;}
.arpa-palette-btn{width:36px;height:36px;border-radius:8px;border:1px solid var(--arpa-border);background:#fff;font-weight:600;cursor:pointer;}
.arpa-palette-btn.active{border-color:var(--arpa-black);box-shadow:0 0 0 2px var(--arpa-black) inset;}
.arpa-palette-btn.answered{background:var(--arpa-green);color:#fff;border-color:var(--arpa-green);}
.arpa-palette-btn.review{background:var(--arpa-red);color:#fff;border-color:var(--arpa-red);}
.arpa-palette-btn.unanswered{background:#fff;}
.arpa-legend{list-style:none;padding:0;margin:0;font-size:13px;display:flex;flex-direction:column;gap:8px;}
.arpa-legend .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:8px;}
.dot.answered{background:var(--arpa-green);}
.dot.review{background:var(--arpa-red);}
.dot.unanswered{background:var(--arpa-border);}

@media(max-width:782px){.arpa-quiz-layout{grid-template-columns:1fr;}}

/* ---------- Dashboard Stats ---------- */
.arpa-stat-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px;}
.arpa-stat-card{background:#fff;border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);padding:18px;}
.arpa-stat-card .label{display:block;font-size:13px;color:var(--arpa-gray);margin-bottom:6px;}
.arpa-stat-card .value{display:block;font-size:26px;font-weight:800;}
.arpa-subject-strength{background:#fff;border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);padding:20px;}
.arpa-progress-row{display:grid;grid-template-columns:100px 1fr 40px;align-items:center;gap:12px;margin-bottom:12px;font-size:14px;}
.arpa-progress-bar{height:8px;background:var(--arpa-light);border-radius:4px;overflow:hidden;}
.arpa-progress-fill{height:100%;background:var(--arpa-red);}
@media(max-width:782px){.arpa-stat-cards{grid-template-columns:repeat(2,1fr);}}

/* ---------- Lists (notes, mock tests, past papers) ---------- */
.arpa-list-table{display:flex;flex-direction:column;gap:1px;background:var(--arpa-border);border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);overflow:hidden;}
.arpa-list-row{display:flex;justify-content:space-between;align-items:center;background:#fff;padding:16px 18px;gap:12px;}
.arpa-list-title{font-weight:600;display:block;}
.arpa-list-meta{font-size:12px;color:var(--arpa-gray);}
.arpa-list-actions{display:flex;gap:8px;}

/* ---------- Leaderboard ---------- */
.arpa-leaderboard{display:flex;flex-direction:column;gap:1px;background:var(--arpa-border);border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);overflow:hidden;}
.arpa-leaderboard-row{display:grid;grid-template-columns:40px 1fr auto;align-items:center;gap:12px;background:#fff;padding:12px 16px;}
.arpa-leaderboard-row.is-you{background:#fdeceb;}
.arpa-leaderboard-row .rank{font-weight:700;color:var(--arpa-gray);}
.arpa-leaderboard-row .xp{font-weight:700;color:var(--arpa-red);}

/* ---------- Subjects grid ---------- */
.arpa-subjects-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.arpa-subject-card{display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);padding:18px;text-decoration:none;color:var(--arpa-black);transition:.15s;}
.arpa-subject-card:hover{border-color:var(--arpa-red);transform:translateY(-2px);}
.arpa-subject-name{font-weight:700;color:var(--arpa-red);}
.arpa-subject-count{font-size:12px;color:var(--arpa-gray);}
@media(max-width:900px){.arpa-subjects-grid{grid-template-columns:repeat(2,1fr);}}

/* ---------- Study Planner ---------- */
.arpa-planner{display:grid;grid-template-columns:1fr 320px;gap:20px;}
.arpa-planner-calendar,.arpa-planner-tasks{background:#fff;border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);padding:18px;}
.arpa-planner-cal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;}
.arpa-planner-cal-header button{background:none;border:1px solid var(--arpa-border);border-radius:6px;width:30px;height:30px;cursor:pointer;}
.arpa-cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;text-align:center;font-size:13px;}
.cal-dow{font-weight:700;color:var(--arpa-gray);padding:6px 0;font-size:11px;}
.cal-cell{padding:8px 0;border-radius:6px;cursor:pointer;}
.cal-cell:hover{background:var(--arpa-light);}
.cal-cell.selected{background:var(--arpa-red);color:#fff;}
.cal-cell.has-task::after{content:'';display:block;width:4px;height:4px;background:var(--arpa-red);border-radius:50%;margin:2px auto 0;}
.cal-cell.selected.has-task::after{background:#fff;}
.arpa-task-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--arpa-border);font-size:14px;}
.arpa-task-row.done label{text-decoration:line-through;color:var(--arpa-gray);}
.arpa-task-meta{font-size:12px;color:var(--arpa-gray);}
.arpa-task-delete{background:none;border:none;color:var(--arpa-gray);cursor:pointer;font-size:16px;}
#arpa-add-task-form{display:flex;flex-direction:column;gap:8px;margin-top:14px;}
#arpa-add-task-form input{padding:9px 12px;border:1px solid var(--arpa-border);border-radius:8px;font-size:13px;}
@media(max-width:782px){.arpa-planner{grid-template-columns:1fr;}}

/* ---------- AI Tutor ---------- */
.arpa-ai-tutor{background:#fff;border:1px solid var(--arpa-border);border-radius:var(--arpa-radius);display:flex;flex-direction:column;height:420px;}
.arpa-ai-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;}
.arpa-ai-msg{max-width:75%;padding:10px 14px;border-radius:12px;font-size:14px;}
.arpa-ai-msg.bot{background:var(--arpa-light);align-self:flex-start;}
.arpa-ai-msg.user{background:var(--arpa-red);color:#fff;align-self:flex-end;}
#arpa-ai-form{display:flex;gap:8px;padding:14px;border-top:1px solid var(--arpa-border);}
#arpa-ai-form input{flex:1;padding:10px 14px;border:1px solid var(--arpa-border);border-radius:8px;}