/* =====================================================
   TutorIA — Tema juvenil violeta-cyan
   ===================================================== */
:root {
  --bg: #0c0a1d;
  --bg2: #15123a;
  --card: #1c1942;
  --card2: #251f55;
  --line: #2c2768;
  --text: #f5f3ff;
  --muted: #a6a4d0;
  --p1: #7c3aed;     /* violeta */
  --p2: #06b6d4;     /* cyan */
  --p3: #fbbf24;     /* dorado */
  --p4: #ec4899;     /* rosa */
  --ok: #10b981;
  --warn: #f97316;
  --danger: #ef4444;
  --grad: linear-gradient(135deg,#7c3aed 0%,#ec4899 50%,#06b6d4 100%);
  --grad2: linear-gradient(135deg,#06b6d4,#7c3aed);
  --shadow: 0 12px 40px rgba(124,58,237,.25);
}
[data-theme="light"] {
  --bg: #f5f3ff;
  --bg2: #fff;
  --card: #fff;
  --card2: #f1edff;
  --line: #e0d9f5;
  --text: #2d2a55;
  --muted: #6c6a8a;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; min-height: 100vh; overscroll-behavior: none; }
body::before { content: ''; position: fixed; inset: 0; background: radial-gradient(at 20% 10%, rgba(124,58,237,.18), transparent 50%), radial-gradient(at 80% 90%, rgba(6,182,212,.15), transparent 50%); pointer-events: none; z-index: -1; }
button { font-family: inherit; cursor: pointer; }
a { color: inherit; }

/* ===== Control de vistas ===== */
body.view-loading #authView, body.view-loading #topbar, body.view-loading #appShell, body.view-loading #adminView { display: none !important; }
body.view-auth #topbar, body.view-auth #appShell, body.view-auth #adminView { display: none !important; }
body.view-app #authView, body.view-app #adminView { display: none !important; }
body.view-admin #topbar, body.view-admin #appShell, body.view-admin #authView { display: none !important; }

/* ===== AUTH VIEW ===== */
.auth-view { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; position: relative; }
.auth-view::after {
  content: ''; position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(circle at 15% 20%, rgba(124,58,237,.35), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(6,182,212,.3), transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(236,72,153,.18), transparent 60%);
  animation: bgShift 18s ease-in-out infinite alternate;
}
@keyframes bgShift {
  to { background-position: 20% 80%, 80% 20%, 30% 70%; }
}
.auth-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 24px;
  padding: 32px 28px; width: 100%; max-width: 440px;
  box-shadow: 0 20px 60px rgba(0,0,0,.4), 0 0 60px rgba(124,58,237,.15);
  backdrop-filter: blur(20px);
}
.auth-logo {
  font-size: 32px; font-weight: 900; text-align: center; letter-spacing: -.02em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.auth-tagline { text-align: center; color: var(--muted); font-size: 13px; margin: 4px 0 22px; }
.auth-tabs { display: flex; gap: 4px; background: var(--bg2); padding: 4px; border-radius: 12px; margin-bottom: 18px; border: 1px solid var(--line); }
.auth-tab { flex: 1; padding: 9px; border-radius: 9px; background: none; border: none; color: var(--muted); font-weight: 700; font-size: 13px; transition: all .15s; }
.auth-tab.on { background: var(--card); color: var(--text); box-shadow: 0 2px 8px rgba(0,0,0,.15); }
.auth-form { display: flex; flex-direction: column; gap: 12px; }
.auth-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.auth-form label { display: flex; flex-direction: column; gap: 5px; font-size: 11px; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.auth-form input[type=text], .auth-form input[type=password], .auth-form input[type=email] {
  padding: 11px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg2); color: var(--text); font-size: 14px; font-family: inherit; transition: border-color .15s;
}
.auth-form input:focus { outline: none; border-color: var(--p2); }
.auth-check { flex-direction: row !important; align-items: center; gap: 8px; text-transform: none !important; letter-spacing: 0 !important; font-size: 12px !important; color: var(--muted) !important; font-weight: 500 !important; }
.auth-check input { accent-color: var(--p1); width: 16px; height: 16px; }
.auth-submit { margin-top: 6px; padding: 13px; font-size: 15px; font-weight: 800; letter-spacing: .01em; }
.auth-err { color: var(--danger); font-size: 13px; margin: 0; min-height: 18px; text-align: center; font-weight: 600; }
.auth-footer { text-align: center; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); }
.auth-footer code { background: var(--bg2); padding: 2px 6px; border-radius: 4px; font-family: ui-monospace, monospace; font-size: 12px; color: var(--p2); }

/* ===== TOPBAR ===== */
.topbar {
  display: flex; align-items: center; gap: 10px; padding: 12px 16px;
  background: var(--bg2); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20; backdrop-filter: blur(12px);
}
.menu-btn { background: var(--card); border: 1px solid var(--line); color: var(--text); padding: 8px 12px; border-radius: 10px; font-size: 18px; display: none; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 900; font-size: 18px; letter-spacing: -.01em; }
.brand .logo { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; font-size: 24px; }
.spacer { flex: 1; }
.hud { display: flex; gap: 8px; align-items: center; }
.hud-item { background: var(--card); border: 1px solid var(--line); padding: 6px 10px; border-radius: 99px; font-size: 13px; font-weight: 700; display: inline-flex; gap: 4px; align-items: center; }
.hud-item.lvl { background: var(--grad); color: white; border: 0; }
.hud-item.pts b { color: var(--p3); }
.settings-btn { background: var(--card); border: 1px solid var(--line); color: var(--text); padding: 8px 12px; border-radius: 10px; font-size: 16px; }
.settings-btn:hover { background: var(--card2); }
.user-pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--card); border: 1px solid var(--line);
  padding: 5px 12px 5px 5px; border-radius: 99px;
  font-size: 13px; font-weight: 700;
}
.user-avatar-mini { width: 26px; height: 26px; border-radius: 50%; background: var(--grad); display: inline-flex; align-items: center; justify-content: center; font-size: 14px; }

/* ===== APP layout ===== */
.app { display: flex; min-height: calc(100vh - 64px); }

/* ===== SIDEBAR ===== */
.sidebar { width: 280px; flex-shrink: 0; background: var(--bg2); border-right: 1px solid var(--line); display: flex; flex-direction: column; padding: 16px; }
.sidebar-head { display: flex; gap: 12px; align-items: center; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.me-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--grad); display: flex; align-items: center; justify-content: center; font-size: 22px; }
.me-info { min-width: 0; }
.me-name { font-weight: 800; font-size: 14px; }
.me-meta { color: var(--muted); font-size: 11px; }
.xpbar { height: 8px; background: var(--card); border-radius: 99px; margin: 12px 0; overflow: hidden; }
.xpbar > div { height: 100%; background: var(--grad); transition: width .4s; width: 0; }
.sidebar h3 { margin: 12px 0 8px; font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.modules { display: flex; flex-direction: column; gap: 6px; }
.mod-link { display: flex; gap: 10px; padding: 12px; border-radius: 12px; background: var(--card); border: 1px solid transparent; transition: all .15s; cursor: pointer; align-items: center; }
.mod-link:hover { border-color: var(--p2); background: var(--card2); }
.mod-link.on { background: var(--grad); color: white; border-color: transparent; }
.mod-link .ml-ico { width: 32px; height: 32px; border-radius: 10px; background: var(--bg2); display: flex; align-items: center; justify-content: center; font-size: 18px; flex-shrink: 0; }
.mod-link.on .ml-ico { background: rgba(255,255,255,.2); }
.mod-link .ml-info { flex: 1; min-width: 0; }
.mod-link .ml-title { font-weight: 700; font-size: 13px; }
.mod-link .ml-pct { font-size: 11px; opacity: .8; }
.sidebar-foot { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.link-btn { background: var(--card); border: 1px solid var(--line); color: var(--text); padding: 10px; border-radius: 10px; text-align: left; font-size: 13px; }
.link-btn:hover { background: var(--card2); }
.link-btn.danger:hover { color: var(--danger); border-color: var(--danger); }

/* ===== MAIN ===== */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; padding: 24px; overflow-y: auto; max-height: calc(100vh - 64px); }

/* ===== WELCOME ===== */
.welcome { max-width: 1100px; margin: 0 auto; width: 100%; }
.hero { background: var(--grad); color: white; padding: 32px 28px; border-radius: 24px; box-shadow: var(--shadow); margin-bottom: 24px; position: relative; overflow: hidden; }
.hero::after { content: '⚛️'; position: absolute; right: -20px; top: -20px; font-size: 180px; opacity: .12; }
.hero h1 { margin: 0 0 8px; font-size: clamp(24px, 4vw, 36px); font-weight: 900; letter-spacing: -.02em; }
.hero p { margin: 0; font-size: 16px; opacity: .95; max-width: 600px; line-height: 1.5; }

.grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-bottom: 24px; }
.mod-card { background: var(--card); border: 1px solid var(--line); padding: 18px; border-radius: 18px; cursor: pointer; transition: all .2s; position: relative; overflow: hidden; }
.mod-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--grad); }
.mod-card:hover { transform: translateY(-3px); border-color: var(--p2); box-shadow: 0 12px 30px rgba(6,182,212,.2); }
.mod-card .mc-ico { font-size: 36px; margin-bottom: 10px; }
.mod-card h3 { margin: 0 0 6px; font-size: 16px; font-weight: 800; }
.mod-card p { margin: 0 0 12px; color: var(--muted); font-size: 12px; line-height: 1.4; }
.mod-card .mc-progress { height: 6px; background: var(--bg2); border-radius: 99px; overflow: hidden; }
.mod-card .mc-progress > div { height: 100%; background: var(--grad2); transition: width .3s; }

.welcome-tips { background: var(--card); border: 1px solid var(--line); padding: 22px; border-radius: 18px; }
.welcome-tips h2 { margin: 0 0 14px; font-size: 18px; }
.welcome-tips ul { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 8px; }
.welcome-tips li { padding: 10px 14px; background: var(--card2); border-radius: 10px; font-size: 13px; }

/* ===== MÓDULO VIEW ===== */
.module-view { max-width: 1100px; margin: 0 auto; width: 100%; }
.mod-head { display: flex; gap: 14px; align-items: center; padding: 18px; background: var(--card); border-radius: 18px; margin-bottom: 18px; }
.back-btn { background: var(--card2); border: 1px solid var(--line); color: var(--text); padding: 8px 14px; border-radius: 10px; font-size: 13px; font-weight: 700; }
.back-btn:hover { background: var(--p1); color: white; border-color: var(--p1); }
.mod-info { flex: 1; min-width: 0; }
.mod-info h2 { margin: 0; font-size: 22px; font-weight: 900; }
.topics { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.mp-ring { width: 64px; height: 64px; border-radius: 50%; background: conic-gradient(var(--p3) calc(var(--p,0)*1%), var(--card2) 0); display: flex; align-items: center; justify-content: center; position: relative; }
.mp-ring::before { content: ''; position: absolute; inset: 4px; background: var(--card); border-radius: 50%; }
.mp-ring span { position: relative; font-weight: 900; font-size: 13px; }

.mod-formulas { background: var(--card); border: 1px solid var(--p3); border-radius: 14px; padding: 16px 18px; margin: 0 0 18px; }
.mod-formulas h4 { margin: 0 0 10px; font-size: 14px; color: var(--p3); font-weight: 800; letter-spacing: .03em; }
.formula-row { padding: 8px 12px; margin: 4px 0; background: var(--card2); border-radius: 8px; font-size: 16px; line-height: 1.6; overflow-x: auto; }
.formula-row mjx-container { font-size: 110% !important; }
.formula-row::-webkit-scrollbar { height: 6px; }
.formula-row::-webkit-scrollbar-thumb { background: var(--line); border-radius: 99px; }
.msg.bot mjx-container { color: var(--p2); }

.opts-title { margin: 0 0 12px; font-size: 16px; }
.opts { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }
.opt-btn { background: var(--card); border: 2px solid var(--line); padding: 22px 18px; border-radius: 18px; text-align: center; cursor: pointer; transition: all .2s; color: var(--text); }
.opt-btn:hover { border-color: var(--p2); transform: translateY(-2px); background: var(--card2); }
.opt-btn .o-ico { font-size: 40px; display: block; margin-bottom: 8px; }
.opt-btn .o-title { font-size: 15px; font-weight: 800; margin-bottom: 4px; }
.opt-btn .o-desc { font-size: 11px; color: var(--muted); }

/* ===== CHAT VIEW ===== */
.chat-view { max-width: 900px; margin: 0 auto; width: 100%; display: flex; flex-direction: column; flex: 1; }
.chat-head { display: flex; gap: 12px; align-items: center; padding: 14px 18px; background: var(--card); border-radius: 14px; margin-bottom: 12px; }
.chat-title { flex: 1; min-width: 0; }
.chat-title h3 { margin: 0; font-size: 15px; font-weight: 800; }
.new-chat { background: var(--card2); border: 1px solid var(--line); padding: 8px 12px; border-radius: 10px; font-size: 14px; }
.chat-msgs { flex: 1; overflow-y: auto; padding: 14px; background: var(--card); border-radius: 14px; margin-bottom: 12px; min-height: 320px; max-height: 60vh; }
.msg { margin-bottom: 14px; padding: 14px 16px; border-radius: 14px; line-height: 1.55; max-width: 90%; word-wrap: break-word; }
.msg.user { background: var(--grad2); color: white; margin-left: auto; }
.msg.bot { background: var(--card2); border: 1px solid var(--line); }
.msg.bot strong { color: var(--p2); }
.msg.bot h1, .msg.bot h2, .msg.bot h3 { margin: 12px 0 6px; color: var(--p3); }
.msg.bot ul, .msg.bot ol { padding-left: 22px; }
.msg.bot code { background: var(--bg2); padding: 2px 6px; border-radius: 4px; font-family: ui-monospace, Menlo, monospace; font-size: 13px; }
.msg.bot pre { background: var(--bg2); padding: 12px; border-radius: 8px; overflow-x: auto; }
.msg.bot table { border-collapse: collapse; margin: 10px 0; }
.msg.bot th, .msg.bot td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.msg.system { background: rgba(124,58,237,.12); border: 1px dashed var(--p1); font-size: 13px; color: var(--muted); }
.msg img.thumb { max-width: 240px; border-radius: 10px; margin-top: 8px; }

/* ===== QUICK ACTIONS ===== */
.quick-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; padding: 0 4px; }
.qa { padding: 8px 14px; border-radius: 99px; border: 1px solid var(--line); background: var(--card); color: var(--text); font-size: 12px; font-weight: 700; }
.qa:hover { transform: translateY(-1px); }
.qa.correct { border-color: var(--ok); }
.qa.correct:hover { background: var(--ok); color: white; }
.qa.hint { border-color: var(--p3); }
.qa.hint:hover { background: var(--p3); color: black; }
.qa.challenge { border-color: var(--p4); }
.qa.challenge:hover { background: var(--p4); color: white; }
.qa.retry:hover { background: var(--card2); }

/* ===== COMPOSER ===== */
.composer { display: flex; gap: 8px; padding: 10px; background: var(--card); border-radius: 14px; align-items: flex-end; }
.attach { background: var(--card2); border: 1px solid var(--line); color: var(--text); width: 42px; height: 42px; border-radius: 10px; font-size: 18px; flex-shrink: 0; }
.composer textarea { flex: 1; background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 12px; color: var(--text); font-family: inherit; font-size: 14px; resize: none; max-height: 200px; }
.composer textarea:focus { outline: none; border-color: var(--p2); }
.send { background: var(--grad); color: white; border: 0; width: 50px; height: 42px; border-radius: 10px; font-size: 16px; font-weight: 900; flex-shrink: 0; }
.send:disabled { opacity: .5; cursor: not-allowed; }

/* ===== MODAL ===== */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 100; display: flex; align-items: center; justify-content: center; padding: 16px; backdrop-filter: blur(4px); }
.modal[hidden] { display: none; }
.modal-box { background: var(--card); border: 1px solid var(--line); padding: 28px; border-radius: 20px; max-width: 460px; width: 100%; box-shadow: var(--shadow); max-height: 90vh; overflow-y: auto; }
.modal-box.big { max-width: 720px; }
.modal-box h2 { margin: 0 0 14px; font-size: 22px; }
.modal-box label { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.modal-box input, .modal-box select { padding: 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg2); color: var(--text); font-family: inherit; font-size: 14px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 18px; flex-wrap: wrap; }
.btn { background: var(--grad); color: white; border: 0; padding: 10px 18px; border-radius: 10px; font-weight: 700; font-size: 14px; }
.btn.alt { background: var(--card2); color: var(--text); border: 1px solid var(--line); }
.btn.alt:hover { background: var(--card); }
.btn.alt.danger:hover { background: var(--danger); color: white; border-color: var(--danger); }

/* ===== BADGES ===== */
.badges-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; margin: 14px 0; }
.badge { padding: 14px; background: var(--card2); border: 1px solid var(--line); border-radius: 14px; text-align: center; transition: all .2s; }
.badge.unlocked { border-color: var(--p3); background: linear-gradient(135deg,var(--card2),rgba(251,191,36,.15)); }
.badge.locked { opacity: .35; filter: grayscale(.8); }
.badge .b-ico { font-size: 36px; margin-bottom: 6px; }
.badge .b-name { font-size: 12px; font-weight: 800; }
.badge .b-desc { font-size: 10px; color: var(--muted); margin-top: 2px; }

/* ===== TOAST ===== */
.toast { position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%); background: var(--grad); color: white; padding: 14px 22px; border-radius: 99px; font-weight: 700; font-size: 14px; z-index: 200; box-shadow: var(--shadow); animation: pop .3s; }
.toast[hidden] { display: none; }
@keyframes pop { from { transform: translate(-50%,20px); opacity: 0; } to { transform: translate(-50%,0); opacity: 1; } }

/* =====================================================
   ADMIN DASHBOARD
   ===================================================== */
.admin-topbar {
  display: flex; align-items: center; gap: 10px; padding: 14px 24px;
  background: var(--bg2); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20; backdrop-filter: blur(12px);
}
.admin-content { padding: 24px; max-width: 1320px; margin: 0 auto; }
.admin-banner {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: var(--grad); color: white; padding: 24px 28px; border-radius: 20px;
  margin-bottom: 22px; box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.admin-banner::after { content: '📊'; position: absolute; right: -10px; bottom: -30px; font-size: 140px; opacity: .15; }
.admin-banner h2 { margin: 0 0 4px; font-size: 22px; font-weight: 900; }
.admin-banner p { margin: 0; opacity: .9; font-size: 14px; }
.admin-banner .btn { background: rgba(255,255,255,.18); color: white; border: 1px solid rgba(255,255,255,.3); backdrop-filter: blur(8px); }
.admin-banner .btn:hover { background: rgba(255,255,255,.28); }

.admin-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 24px;
}
.stat-card {
  background: var(--card); border: 1px solid var(--line); padding: 20px;
  border-radius: 18px; position: relative; overflow: hidden;
}
.stat-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--grad); }
.stat-num {
  font-size: 32px; font-weight: 900; line-height: 1; margin-bottom: 6px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-lbl { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; font-weight: 700; }
.stat-sub { font-size: 11px; color: var(--muted); margin-top: 4px; }

.admin-tabs {
  display: flex; gap: 4px; background: var(--card); padding: 5px;
  border-radius: 14px; border: 1px solid var(--line); margin-bottom: 18px; overflow-x: auto;
}
.admin-tab {
  padding: 10px 18px; border-radius: 10px; background: none; border: none;
  color: var(--muted); font-weight: 700; font-size: 13px; white-space: nowrap;
  transition: all .15s;
}
.admin-tab:hover { color: var(--text); background: var(--card2); }
.admin-tab.on { background: var(--grad); color: white; box-shadow: 0 4px 12px rgba(124,58,237,.3); }

.admin-table-wrap { background: var(--card); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.admin-table { width: 100%; border-collapse: separate; border-spacing: 0; }
.admin-table th {
  background: var(--bg2); padding: 13px 16px; text-align: left;
  font-size: 11px; color: var(--muted); text-transform: uppercase;
  letter-spacing: .06em; font-weight: 800; border-bottom: 1px solid var(--line);
  position: sticky; top: 0;
}
.admin-table td { padding: 14px 16px; border-bottom: 1px solid var(--line); font-size: 14px; }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr.clickable { cursor: pointer; transition: background .15s; }
.admin-table tr.clickable:hover { background: var(--card2); }

.cell-user { display: flex; align-items: center; gap: 10px; }
.cell-user .ua { width: 32px; height: 32px; border-radius: 50%; background: var(--grad); display: inline-flex; align-items: center; justify-content: center; font-size: 16px; }
.cell-user .un b { display: block; font-weight: 700; }
.cell-user .un small { color: var(--muted); font-size: 11px; }

.rank-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%; background: var(--bg2);
  font-size: 12px; font-weight: 800;
}
.rank-num.gold { background: linear-gradient(135deg, #fbbf24, #f59e0b); color: #fff; box-shadow: 0 4px 12px rgba(251,191,36,.4); }
.rank-num.silver { background: linear-gradient(135deg, #cbd5e1, #94a3b8); color: #fff; }
.rank-num.bronze { background: linear-gradient(135deg, #d97706, #92400e); color: #fff; }

.lvl-pill { display: inline-flex; padding: 4px 10px; border-radius: 99px; background: var(--card2); border: 1px solid var(--line); font-size: 11px; font-weight: 700; gap: 4px; align-items: center; }
.lvl-pill.l1 { color: #10b981; border-color: rgba(16,185,129,.4); }
.lvl-pill.l2 { color: #06b6d4; border-color: rgba(6,182,212,.4); }
.lvl-pill.l3 { color: #fbbf24; border-color: rgba(251,191,36,.4); }
.lvl-pill.l4 { color: #ec4899; border-color: rgba(236,72,153,.4); }

.progress-bar { width: 100%; min-width: 80px; height: 6px; background: var(--bg2); border-radius: 99px; overflow: hidden; }
.progress-bar > div { height: 100%; background: var(--grad2); transition: width .3s; }
.progress-cell { display: flex; flex-direction: column; gap: 4px; min-width: 100px; }
.progress-cell small { color: var(--muted); font-size: 11px; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--muted); background: var(--card); border: 1px solid var(--line); border-radius: 18px; }
.empty-state .es-ico { font-size: 56px; margin-bottom: 14px; opacity: .5; }
.empty-state h3 { margin: 0 0 6px; font-size: 18px; color: var(--text); }

/* Per-module completion chart */
.mod-completion { display: grid; gap: 14px; }
.mc-row { background: var(--card); border: 1px solid var(--line); padding: 18px 22px; border-radius: 16px; }
.mc-row h4 { margin: 0 0 4px; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.mc-row .mc-topics { color: var(--muted); font-size: 12px; margin: 0 0 14px; }
.mc-stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px; }
.mc-stat { background: var(--bg2); padding: 12px; border-radius: 10px; }
.mc-stat-num { font-size: 22px; font-weight: 900; color: var(--p2); }
.mc-stat-lbl { font-size: 11px; color: var(--muted); margin-top: 2px; }

/* Badges leaderboard */
.badges-leaderboard { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.bl-card { background: var(--card); border: 1px solid var(--line); padding: 16px 18px; border-radius: 14px; }
.bl-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.bl-ico { font-size: 32px; }
.bl-info h4 { margin: 0; font-size: 14px; }
.bl-info small { color: var(--muted); font-size: 11px; }
.bl-bar { height: 6px; background: var(--bg2); border-radius: 99px; overflow: hidden; margin-bottom: 6px; }
.bl-bar > div { height: 100%; background: var(--grad); }
.bl-count { font-size: 12px; color: var(--muted); }

/* User detail modal */
.ud-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.ud-avatar { width: 56px; height: 56px; border-radius: 50%; background: var(--grad); display: flex; align-items: center; justify-content: center; font-size: 28px; }
#udContent { display: grid; gap: 16px; }
.ud-section { background: var(--bg2); padding: 14px 16px; border-radius: 12px; }
.ud-section h4 { margin: 0 0 10px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.ud-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; }
.ud-kv { background: var(--card); padding: 10px 12px; border-radius: 8px; }
.ud-kv b { display: block; font-size: 18px; color: var(--p2); }
.ud-kv span { font-size: 11px; color: var(--muted); }
.ud-mods { display: grid; gap: 8px; }
.ud-mod { display: flex; align-items: center; gap: 10px; padding: 8px 12px; background: var(--card); border-radius: 8px; }
.ud-mod-ico { font-size: 18px; }
.ud-mod-info { flex: 1; }
.ud-mod-name { font-size: 13px; font-weight: 700; }
.ud-mod-bar { height: 5px; background: var(--bg2); border-radius: 99px; overflow: hidden; margin-top: 4px; }
.ud-mod-bar > div { height: 100%; background: var(--grad2); }
.ud-mod-pct { font-size: 12px; color: var(--muted); font-weight: 700; min-width: 38px; text-align: right; }

/* ===== RESPONSIVE ===== */
@media (max-width: 800px) {
  .menu-btn { display: inline-flex; }
  .sidebar { position: fixed; left: 0; top: 64px; bottom: 0; width: 80%; max-width: 300px; z-index: 30; transform: translateX(-100%); transition: transform .25s; box-shadow: 6px 0 24px rgba(0,0,0,.4); }
  .sidebar.open { transform: translateX(0); }
  .main { padding: 14px; max-height: none; }
  .hero { padding: 22px 18px; border-radius: 16px; }
  .hero h1 { font-size: 22px; }
  .grid-cards { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .mod-card { padding: 14px; }
  .mod-card .mc-ico { font-size: 28px; }
  .opts { grid-template-columns: repeat(2, 1fr); }
  .opt-btn { padding: 16px 12px; }
  .opt-btn .o-ico { font-size: 32px; }
  .hud-item { padding: 4px 8px; font-size: 11px; }
  .brand { font-size: 15px; }
  .user-pill span:not(.user-avatar-mini) { display: none; }
  .auth-row { grid-template-columns: 1fr; }
  .admin-banner { flex-direction: column; align-items: flex-start; }
  .admin-table th, .admin-table td { padding: 10px; font-size: 12px; }
  .admin-content { padding: 14px; }
}
@media (max-width: 480px) {
  .grid-cards { grid-template-columns: 1fr; }
  .quick-actions .qa { font-size: 11px; padding: 6px 10px; }
  .auth-card { padding: 24px 18px; }
}