@import url('https://fonts.googleapis.com/css2?family=Sora:wght@600;700;800&display=swap');

:root{
  --black:#0a0a0b; --surface1:#151517; --surface2:#1c1c1f;
  --white:#ffffff; --text-light:#f5f5f6; --accent:#e0102a; --accent-dark:#a80c20;
  --gray:#6b6b70; --gray-light:#e8e8ea; --border:#e5e5e8;
  --radius-sm:8px; --radius-md:14px; --radius-lg:20px;
  --shadow-card:0 1px 2px rgba(0,0,0,.04), 0 10px 28px rgba(0,0,0,.06);
  --shadow-modal:0 20px 60px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;background:var(--gray-light);color:var(--black);-webkit-font-smoothing:antialiased}
h1,h2,h3,.display{font-family:'Sora',sans-serif;font-weight:700}
button{font-family:inherit;cursor:pointer}
a{color:var(--accent)}
.hidden{display:none !important}

/* ── Botones ── */
.btn{border:none;border-radius:var(--radius-sm);padding:12px 20px;font-size:14px;font-weight:600;transition:.15s;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed}
.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--black)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.btn-dark{background:var(--black);color:#fff}
.btn-dark:hover{background:#000}
.btn-sm{padding:8px 14px;font-size:13px}
.btn-danger{background:#fff0f1;color:var(--accent)}
.btn-danger:hover{background:var(--accent);color:#fff}
.btn-block{width:100%}

/* ── Login ── */
#screen-login{min-height:100vh;background:var(--black);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;padding:20px}
.grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(224,16,42,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(224,16,42,.14) 1px,transparent 1px);background-size:46px 46px;-webkit-mask-image:radial-gradient(ellipse 70% 70% at 50% 40%,#000 40%,transparent 80%);animation:gridMove 9s linear infinite}
@keyframes gridMove{to{background-position:46px 46px,46px 46px}}
.login-card{position:relative;z-index:2;width:100%;max-width:400px;background:#fff;border-radius:var(--radius-lg);padding:36px 32px;box-shadow:var(--shadow-modal)}
.login-logo{width:52px;height:52px;background:var(--black);border-radius:12px;display:flex;align-items:center;justify-content:center;margin:0 auto 18px}
.login-logo img{width:34px}
.login-title{text-align:center;font-size:24px;margin:0 0 4px}
.login-sub{text-align:center;color:var(--gray);font-size:14px;margin:0 0 26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:#333}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:14px;font-family:inherit}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.pw-wrap{position:relative}
.pw-toggle{position:absolute;right:12px;top:11px;background:none;border:none;font-size:12px;font-weight:600;color:var(--accent);padding:0}
.checkbox-row{display:flex;align-items:center;gap:8px;font-size:13px;color:#444;margin-bottom:18px}
.error-banner{background:#fff0f1;border:1px solid #ffc9cf;color:var(--accent-dark);border-radius:var(--radius-sm);padding:10px 12px;font-size:13px;margin-bottom:14px}
.login-switch{text-align:center;margin-top:18px;font-size:13px;color:var(--gray)}
.login-switch button{background:none;border:none;color:var(--accent);font-weight:600;font-size:13px}

/* ── Dashboard alumno ── */
#screen-student{min-height:100vh;background:var(--black);color:var(--text-light)}
.topo-bg{position:fixed;inset:0;opacity:.5;background:radial-gradient(circle at 20% 30%,rgba(224,16,42,.08),transparent 45%),radial-gradient(circle at 80% 70%,rgba(224,16,42,.06),transparent 40%);pointer-events:none}
.app-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:14px 28px;background:rgba(10,10,11,.75);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.header-left{display:flex;align-items:center;gap:12px}
.logo-chip{width:36px;height:36px;background:#000;border-radius:9px;display:flex;align-items:center;justify-content:center}
.logo-chip img{width:22px}
.header-right{display:flex;align-items:center;gap:14px}
.avatar-circle{width:34px;height:34px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.icon-btn{background:rgba(255,255,255,.08);border:none;color:#fff;width:34px;height:34px;border-radius:50%;font-size:15px}
.link-btn{background:none;border:none;color:#ccc;font-size:13px}
.link-btn:hover{color:#fff}
.main-wrap{max-width:1100px;margin:0 auto;padding:36px 28px 80px;position:relative;z-index:1}
.hero-title{font-size:30px;margin:0 0 24px}
.tabbar{display:inline-flex;background:rgba(255,255,255,.06);border-radius:999px;padding:4px;margin-bottom:28px}
.tabbar button{border:none;background:transparent;color:#ccc;padding:9px 20px;border-radius:999px;font-size:13px;font-weight:600}
.tabbar button.active{background:var(--accent);color:#fff}
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.module-card{background:#fff;color:var(--black);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-card)}
.mc-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:10px}
.mc-num{font-size:12px;color:var(--gray);font-weight:700;letter-spacing:.04em}
.badge{font-size:11px;font-weight:700;padding:4px 10px;border-radius:999px;letter-spacing:.02em}
.badge-none{background:#eee;color:#555}
.badge-progress{background:#fff4d6;color:#8a6600}
.badge-review{background:#e6f0ff;color:#0b4fa8}
.badge-pass{background:#e3f7e9;color:#187a3c}
.badge-fail{background:#ffe6e8;color:var(--accent-dark)}
.mc-title{font-size:17px;font-weight:700;margin:0 0 8px}
.mc-desc{font-size:13px;color:var(--gray);margin:0 0 14px;line-height:1.5}
.progress-bar{height:6px;background:#eee;border-radius:99px;margin-bottom:14px;overflow:hidden}
.progress-fill{height:100%;background:var(--accent);border-radius:99px}
.empty-state{color:#aaa;text-align:center;padding:60px 20px;font-size:14px}
.notes-list{display:flex;flex-direction:column;gap:10px}
.note-row{background:#fff;color:var(--black);border-radius:var(--radius-md);padding:16px 20px;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow-card)}
.note-row .nr-title{font-weight:700;font-size:14px}
.note-row .nr-date{font-size:12px;color:var(--gray)}
.practical-card{background:#fff;color:var(--black);border-radius:var(--radius-lg);padding:32px;max-width:480px;box-shadow:var(--shadow-card);text-align:center}
.score-ring{width:130px;height:130px;border-radius:50%;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;font-family:Sora;font-size:28px;font-weight:800}

/* ── Modal genérico ── */
.modal-scrim{position:fixed;inset:0;background:rgba(0,0,0,.55);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal-card{background:#fff;border-radius:var(--radius-lg);padding:28px;max-width:460px;width:100%;box-shadow:var(--shadow-modal);max-height:88vh;overflow:auto}
.modal-card.wide{max-width:720px}
.modal-title{font-size:19px;margin:0 0 6px}
.modal-sub{font-size:13px;color:var(--gray);margin:0 0 20px}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:22px}
.code-input{text-transform:uppercase;letter-spacing:.08em;font-weight:700;text-align:center;font-size:16px}
.shake{animation:shake .4s}
@keyframes shake{10%,90%{transform:translateX(-1px)}20%,80%{transform:translateX(2px)}30%,50%,70%{transform:translateX(-5px)}40%,60%{transform:translateX(5px)}}

/* ── Toma de examen ── */
#screen-exam{min-height:100vh;background:#f4f4f6}
.exam-header{background:#fff;border-bottom:1px solid var(--border);padding:16px 28px;position:sticky;top:0;z-index:10}
.exam-header-top{display:flex;justify-content:space-between;align-items:center;max-width:760px;margin:0 auto 10px}
.exam-title{font-family:Sora;font-weight:700;font-size:16px}
.timer-chip{background:var(--black);color:#fff;font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px}
.exam-progress-bar{max-width:760px;margin:0 auto;height:4px;background:#eee;border-radius:99px;overflow:hidden}
.exam-progress-fill{height:100%;background:var(--accent)}
.exam-body{max-width:760px;margin:0 auto;padding:32px 20px}
.q-meta{display:flex;gap:8px;align-items:center;margin-bottom:14px;font-size:12px;color:var(--gray);font-weight:600}
.q-type-label{background:#eee;padding:3px 9px;border-radius:99px}
.q-required{color:var(--accent)}
.q-card{background:#fff;border-radius:var(--radius-md);padding:26px;box-shadow:var(--shadow-card);margin-bottom:20px}
.q-prompt{font-size:16px;font-weight:600;margin:0 0 18px;line-height:1.5}
.q-media{width:100%;max-height:220px;background-size:cover;background-position:center;border-radius:var(--radius-sm);margin-bottom:18px;background-color:#eee}
.opt-row{display:flex;align-items:center;gap:12px;padding:13px 15px;border:1.5px solid var(--border);border-radius:var(--radius-sm);margin-bottom:8px;cursor:pointer;font-size:14px}
.opt-row:hover{border-color:#ccc}
.opt-row.selected{border-color:var(--accent);background:#fff5f6}
.opt-dot{width:18px;height:18px;border-radius:50%;border:2px solid #ccc;flex-shrink:0;position:relative}
.opt-row.selected .opt-dot{border-color:var(--accent)}
.opt-row.selected .opt-dot::after{content:'';position:absolute;inset:3px;background:var(--accent);border-radius:50%}
.opt-box{width:18px;height:18px;border-radius:5px;border:2px solid #ccc;flex-shrink:0;position:relative}
.opt-row.selected .opt-box{border-color:var(--accent);background:var(--accent)}
.opt-row.selected .opt-box::after{content:'✓';position:absolute;inset:0;color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center}
.tf-row{display:flex;gap:12px}
.tf-pill{flex:1;text-align:center;padding:13px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-weight:600;font-size:14px}
.tf-pill.selected{border-color:var(--accent);background:var(--accent);color:#fff}
.q-nav-dots{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:22px 0}
.q-dot{width:12px;height:12px;border-radius:50%;border:2px solid #ccc;background:transparent}
.q-dot.answered{background:var(--black);border-color:var(--black)}
.q-dot.current{background:var(--accent);border-color:var(--accent);transform:scale(1.3)}
.exam-nav{display:flex;justify-content:space-between;gap:10px}
.toast{position:fixed;bottom:24px;right:24px;background:var(--black);color:#fff;padding:10px 18px;border-radius:99px;font-size:13px;font-weight:600;z-index:200;animation:fadeIn .2s}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ── Resultado ── */
#screen-result{min-height:100vh;background:var(--black);display:flex;align-items:center;justify-content:center;padding:20px}
.result-card{background:#fff;border-radius:var(--radius-lg);padding:40px;max-width:420px;width:100%;text-align:center;box-shadow:var(--shadow-modal)}
.percent-ring{width:150px;height:150px;border-radius:50%;margin:0 auto 20px;display:flex;align-items:center;justify-content:center}
.percent-ring-inner{width:118px;height:118px;border-radius:50%;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center}
.percent-num{font-family:Sora;font-size:32px;font-weight:800}
.percent-sub{font-size:11px;color:var(--gray)}

/* ── Admin ── */
#screen-admin{min-height:100vh;display:flex;background:#f4f4f6}
.admin-sidebar{width:230px;flex-shrink:0;background:var(--black);color:#fff;display:flex;flex-direction:column;padding:22px 16px}
.admin-nav{display:flex;flex-direction:column;gap:2px;margin-top:24px;flex:1}
.admin-nav button{text-align:left;background:none;border:none;color:#bbb;padding:11px 14px;border-radius:var(--radius-sm);font-size:13.5px;font-weight:600}
.admin-nav button.active{background:var(--accent);color:#fff}
.admin-nav button:hover:not(.active){background:rgba(255,255,255,.08);color:#fff}
.admin-main{flex:1;padding:32px 36px;overflow:auto}
.admin-title{font-size:24px;margin:0 0 22px}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:26px}
.stat-card{background:#fff;border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-card)}
.stat-num{font-family:Sora;font-size:28px;font-weight:800}
.stat-label{font-size:12px;color:var(--gray);margin-top:4px}
.panel-card{background:#fff;border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow-card);margin-bottom:20px}
.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th{text-align:left;padding:10px 12px;color:var(--gray);font-weight:600;border-bottom:1px solid var(--border);font-size:12px;text-transform:uppercase;letter-spacing:.03em}
td{padding:12px;border-bottom:1px solid #f0f0f2}
tr:last-child td{border-bottom:none}
.row-actions{display:flex;gap:6px}
.bar-row{display:flex;align-items:center;gap:12px;margin-bottom:10px;font-size:13px}
.bar-label{width:150px;flex-shrink:0}
.bar-track{flex:1;height:8px;background:#eee;border-radius:99px;overflow:hidden}
.bar-fill{height:100%;background:var(--accent)}
.code-box{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border:1.5px solid var(--border);border-radius:var(--radius-sm);margin-bottom:10px}
.code-value{font-family:Sora;font-weight:800;font-size:18px;color:var(--accent)}
.pill-picker{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.pill-picker button{padding:8px 14px;border-radius:999px;border:1.5px solid var(--border);background:#fff;font-size:12.5px;font-weight:600}
.pill-picker button.active{background:var(--black);color:#fff;border-color:var(--black)}