/* Minimal modern design with exam paper background */
:root{
	--bg:#f7f6f1;
	--paper:#fffdf7;
	--ink:#1e293b;
	--muted:#64748b;
	--primary:#b1c767;
	--primary-600:#9db658;
	--ring:rgba(177,199,103,.25);
	--card:#ffffffdd;
	--shadow:0 10px 30px rgba(0,0,0,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg)}
.paper-bg{background:#b1c767}
.container{max-width:1200px;margin:40px auto;padding:0 20px 80px}
.center{display:flex;justify-content:center;align-items:center;min-height:40vh}
.topbar{position:sticky;top:0;z-index:50;backdrop-filter:saturate(180%) blur(6px);background:rgba(255,255,255,.7);border-bottom:1px solid #e5e7eb;display:flex;align-items:center}
.topbar .brand{font-weight:700;padding:12px 20px}
.topbar nav{margin-left:auto;padding:8px 12px}

.card{background:var(--card);border:1px solid #e5e7eb;border-radius:14px;box-shadow:var(--shadow);padding:22px;margin:18px 0}
.login-card{max-width:420px;width:100%}

/* Dark login screen (tinted) */
.body-dark{min-height:100vh;background:#b1c767;color:#1a1f2a;display:flex;align-items:center;justify-content:center}
.card-dark{background:#ffffff;border:1px solid #dbe3c2;color:#1a1f2a;box-shadow:0 20px 60px rgba(0,0,0,.15)}
.card-dark h2{margin-top:0;margin-bottom:8px}
.card-dark .muted{color:#5d6b3f}
.card-dark input{background:#f7fbe9;color:#1f2937;border:1px solid #cfe0a2}
.card-dark input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--ring)}
.card-dark .btn.primary{background:var(--primary)}

label{display:block;margin-top:10px;margin-bottom:6px;font-weight:600}
input[type=text], input[type=password], input[type=file]{width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:10px;outline:none}
input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--ring)}

.btn{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:10px 18px;border:1px solid transparent;cursor:pointer;transition:.2s}
.btn.primary{background:var(--primary);color:white}
.btn.primary:hover{background:var(--primary-600)}
.btn.ghost{background:transparent;border-color:#cbd5e1;color:var(--ink)}
.btn.ghost:hover{background:#f1f5f9}
.btn.danger{background:#ef4444;color:white}
.btn.danger:hover{background:#dc2626}
.btn.xs{padding:6px 10px;font-size:12px;border-radius:10px}

.grid{display:grid;grid-template-columns:1fr 2fr;gap:12px;align-items:center}
.grid.two{grid-template-columns:1fr 1fr}
.form-actions{grid-column:1/-1;display:flex;align-items:center;justify-content:center;gap:12px;margin-top:6px}
@media (max-width:700px){.grid{grid-template-columns:1fr}}

.alert{padding:12px 14px;border-radius:8px;margin:10px 0}
.alert-danger{background:#fee2e2;border:1px solid #fecaca;color:#991b1b}
.muted{color:var(--muted)}

/* Accordion */
.accordion-item{border:1px solid #e5e7eb;border-radius:12px;margin:10px 0;background:white}
.accordion-header{width:100%;text-align:left;padding:14px 16px;background:#f8fafc;border:none;border-radius:12px;display:flex;justify-content:space-between;cursor:pointer}
.accordion-panel{display:none;padding:16px}
.accordion-item.open .accordion-panel{display:block}

.img-fluid{max-width:100%;height:auto;border-radius:10px;border:1px solid #e5e7eb}
.tiny-actions{display:flex;gap:8px;align-items:center;margin-top:8px}
.tiny-input{width:auto}

/* Exam card */
.exam-card{background:var(--paper);}
.exam-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px dashed #e2e8f0;padding-bottom:10px;margin-bottom:14px}
.exam-body{padding-top:6px}

/* Modal */
.modal{position:fixed;inset:0;background:rgba(26,31,42,.6);display:none;align-items:center;justify-content:center;padding:20px;z-index:9999}
.modal.show{display:flex}
.modal-dialog{background:white;padding:10px;border-radius:12px;max-width:900px;width:100%;box-shadow:var(--shadow)}
.modal-close{position:absolute;margin:10px;right:20px;top:20px;background:#0f172a;color:#fff;border:none;border-radius:50%;width:36px;height:36px;cursor:pointer} 

/* External question heading */
.qb-heading{font-weight:700;margin:12px 4px 8px 4px}

/* Student question list layout */
.qb-list{display:flex;flex-direction:column;gap:28px;margin:24px 0}
.qb-card{display:grid;grid-template-columns:1fr 260px;gap:16px;background:#fff;border:1px solid #e5e7eb;border-radius:14px;box-shadow:var(--shadow);padding:0;overflow:hidden}
.qb-body{padding:18px;display:flex;align-items:center;justify-content:center}
.qb-body .img-fluid{max-height:none;border:none}
.qb-side{background:#f8fafc;border-left:1px solid #e5e7eb;display:flex;flex-direction:column;gap:12px;padding:14px}
.qb-title{font-weight:700;padding:14px 18px;border-bottom:1px dashed #e5e7eb;background:var(--paper);display:none}
.qb-action{display:flex;align-items:center;gap:10px;justify-content:flex-start}
.qb-badge{font-size:12px;color:#64748b;background:#eef2ff;border:1px solid #e5e7eb;border-radius:8px;padding:2px 8px}
.qb-meta{display:flex;gap:10px;align-items:center;font-size:12px;color:#64748b}

.question-actions{display:flex;justify-content:flex-end;padding:8px 16px;border-top:1px solid #e5e7eb;background:#f8fafc}

/* Hero Section Styles */
.hero-section{margin-bottom:40px}
.hero-content{display:grid;grid-template-columns:1fr 400px;gap:40px;align-items:start}
.hero-left{padding:20px 40px 0 0}
.hero-left h1{font-size:2.5rem;font-weight:800;margin:0 0 20px 0;color:var(--ink);line-height:1.2}
.hero-description{font-size:1.1rem;line-height:1.6;color:var(--muted);margin-bottom:24px}
.hero-features{line-height:1.8;color:var(--ink)}
.hero-right{position:sticky;top:100px}

/* Signup Form Styles */
.signup-form{display:grid;gap:16px}
.form-row{display:flex;flex-direction:column;gap:6px}
.form-row label{font-weight:600;color:var(--ink)}
.form-row input{width:100%;padding:12px 16px;border:1px solid #d1d5db;border-radius:10px;outline:none;font-size:14px}
.form-row input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--ring)}
.form-actions{display:flex;gap:12px;align-items:center;justify-content:center;margin-top:8px}
@media (max-width:600px){.form-actions{flex-direction:column;gap:8px}}

/* Responsive Hero Section */
@media (max-width:900px){
	.hero-content{grid-template-columns:1fr;gap:30px}
	.hero-right{position:static}
	.hero-left h1{font-size:2rem}
}
@media (max-width:900px){.qb-card{grid-template-columns:1fr}.qb-side{border-left:none;border-top:1px solid #e5e7eb}}