/* ==========================================
   CLASSROOM INSTRUCTOR — Adding students
   4 animation blocks across 4 H2 sections:
     1. Getting Started (Students tab + + menu opens)
     2. Add Individual Student (drawer w/ 6 fields)
     3. Add Multiple Students via CSV (page + preview modal w/ validation)
     4. Add from List (institute list w/ checkboxes + Add Students button)

   Reuses the .mc-* shell pattern from my-classes.css.
   ========================================== */

/* === CONTAINER (shared base) === */
.guide-anim{border:1px solid #e5e5e0;border-radius:14px;overflow:hidden;margin:24px 0 32px;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,0.04);position:relative;z-index:0}
.ga-slides{position:relative}
.ga-slide{display:none}
.ga-slide.active{display:block}
.ga-viewport{position:relative;height:340px;overflow:hidden;background:#f3f4f6;cursor:pointer}
.ga-info{padding:18px 22px 14px;font-family:var(--db-font,system-ui,sans-serif)}
.ga-step-badge{display:inline-block;font-size:10px;font-weight:700;color:#1967D2;background:#E8F0FE;padding:4px 12px;border-radius:20px;margin-bottom:8px;text-transform:uppercase;letter-spacing:.8px}
.ga-info h3{font-size:16px;font-weight:600;margin-bottom:4px;color:#1a1a1a}
.ga-info p{font-size:13px;color:#6b6b6b;line-height:1.55;margin:0}
.ga-overlay{position:absolute;inset:0;background:rgba(0,0,0,.45);z-index:200;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .25s ease}
.ga-overlay.on{opacity:1;pointer-events:auto}
.ga-overlay-btn{width:50px;height:50px;border-radius:50%;background:rgba(255,255,255,.9);display:flex;align-items:center;justify-content:center;cursor:pointer}
.ga-overlay-btn svg{width:22px;height:22px;color:#333;margin-left:3px}
.ga-reset-float{position:absolute;bottom:8px;right:8px;width:28px;height:28px;border-radius:50%;background:rgba(255,255,255,.85);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:201;opacity:0;pointer-events:none;transition:opacity .25s ease}
.ga-reset-float.on{opacity:1;pointer-events:auto}
.ga-reset-float svg{width:13px;height:13px;color:#333}
.ga-progress{height:3px;background:#eee;border-radius:2px}
.ga-progress-bar{height:100%;background:#4285f4;transition:width .5s ease;border-radius:2px}
.ga-cursor{position:absolute;width:20px;height:24px;z-index:100;pointer-events:none;opacity:0;filter:drop-shadow(1px 2px 2px rgba(0,0,0,.25))}
.ga-cursor.vis{opacity:1}

/* === SCENE BASE === */
.sc{position:absolute;inset:0;opacity:0;pointer-events:none;transition:opacity .4s ease;font-family:var(--db-font,system-ui,sans-serif)}
.sc.on{opacity:1;pointer-events:auto}

/* === Sidebar === */
.mc-shell{display:flex;height:100%;background:#fff}
.mc-side{width:108px;background:#fff;border-right:1px solid #eee;padding:12px 0;display:flex;flex-direction:column;gap:1px;flex-shrink:0}
.mc-side-logo{display:flex;align-items:center;gap:5px;padding:0 12px 14px}
.mc-side-logo i{width:18px;height:18px;background:#4285f4;border-radius:5px;display:block}
.mc-side-logo span{font-size:12px;font-weight:600;color:#1a1a1a}
.mc-nav{padding:7px 12px;font-size:9.5px;color:#999;display:flex;align-items:center;gap:7px;margin-right:6px;border-radius:0 7px 7px 0}
.mc-nav i{width:13px;height:13px;border-radius:4px;background:currentColor;opacity:.2;display:block}
.mc-nav.act{background:#4285f4;color:#fff;font-weight:600}
.mc-nav.act i{opacity:.5}

/* === Main body === */
.mc-body{flex:1;background:#f3f4f6;padding:8px 12px;overflow:hidden;position:relative}
.mc-top{display:flex;justify-content:flex-end;align-items:center;gap:7px;margin-bottom:8px}
.mc-uname{font-size:9px;color:#888;text-align:right;line-height:1.3}
.mc-uname b{color:#333;display:block;font-size:10px}
.mc-uname-role{font-size:8px;color:#aaa}
.mc-av{width:24px;height:24px;border-radius:50%;background:#42b883;color:#fff;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center}
.mc-crumb{font-size:9px;color:#777;margin-bottom:6px}
.mc-crumb b{color:#333;font-weight:600}

/* === Tabs (Assignments / Students) === */
.mc-tabs{display:flex;background:#fff;border-radius:6px 6px 0 0;overflow:hidden;border-bottom:1px solid #eee}
.mc-tab{padding:7px 14px;font-size:10px;font-weight:600;color:#999;cursor:default;transition:all .2s;border-bottom:2px solid transparent}
.mc-tab.act{color:#4285f4;background:#eef4ff;border-bottom-color:#4285f4;border-radius:6px 6px 0 0;border:1px solid #4285f4}
.mc-toolbar-row{display:flex;align-items:center;justify-content:flex-end;gap:6px;margin-top:6px;margin-bottom:6px}
.mc-csv{width:22px;height:22px;border:1px solid #e0e0e0;border-radius:5px;display:flex;align-items:center;justify-content:center;font-size:7px;color:#666;background:#fff}
.mc-search{flex:0 0 130px;height:22px;border:1px solid #e0e0e0;border-radius:5px;background:#fff;font-size:9px;color:#aaa;padding:0 8px;display:flex;align-items:center}

/* === Students table === */
.mc-stable{background:#fff;border-radius:6px;overflow:hidden;font-size:9px;border:1px solid #eee}
.mc-sthd{display:grid;grid-template-columns:24px 1fr 1.2fr 1.6fr 0.8fr 0.6fr 0.7fr;background:#fff;padding:7px 10px;font-weight:600;color:#333;border-bottom:1px solid #eee;font-size:9px;align-items:center;gap:4px}
.mc-stcb{width:11px;height:11px;border:1px solid #ccc;border-radius:2px}
.mc-strow{display:grid;grid-template-columns:24px 1fr 1.2fr 1.6fr 0.8fr 0.6fr 0.7fr;padding:6px 10px;border-bottom:1px solid #f3f3f3;align-items:center;background:#fff;font-size:9px;gap:4px}
.mc-actions{display:flex;gap:3px}
.mc-action-btn{width:18px;height:18px;border:1px solid #ddd;border-radius:4px;display:flex;align-items:center;justify-content:center;background:#fff;color:#666;font-size:8px}
.mc-action-btn svg{width:9px;height:9px}

/* === FAB & speed-dial menu === */
.mc-fab{position:absolute;bottom:14px;right:14px;width:32px;height:32px;background:#4285f4;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:300;line-height:1;box-shadow:0 4px 12px rgba(66,133,244,.3);transition:transform .2s,box-shadow .2s;z-index:5}
.mc-fab.hl{transform:scale(1.15);box-shadow:0 0 0 4px rgba(66,133,244,.3),0 4px 12px rgba(66,133,244,.4)}
.mc-fab.act{transform:rotate(45deg)}
.mc-speeddial{position:absolute;bottom:55px;right:14px;background:#fff;border-radius:8px;padding:6px;box-shadow:0 6px 24px rgba(0,0,0,.14);font-size:9px;z-index:6;opacity:0;transform:translateY(8px);pointer-events:none;transition:opacity .25s ease,transform .25s ease;min-width:140px}
.mc-speeddial.on{opacity:1;transform:translateY(0);pointer-events:auto}
.mc-sd-item{padding:6px 8px;display:flex;align-items:center;gap:8px;color:#333;cursor:default;border-radius:5px;transition:background .15s}
.mc-sd-item.hl{background:#f0f4ff}
.mc-sd-ico{width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:11px;font-weight:700;flex-shrink:0}
.mc-sd-ico.add-st{background:#4285f4}
.mc-sd-ico.add-mu{background:#42b883}
.mc-sd-ico.add-li{background:#7c4dff}
.mc-sd-ico svg{width:11px;height:11px}

/* ==========================================
   SCENE 2 — Add Student drawer
   ========================================== */
.mc-drawer{position:absolute;top:0;right:0;bottom:0;width:55%;background:#fff;border-left:1px solid #ddd;box-shadow:-8px 0 24px rgba(0,0,0,.08);transform:translateX(100%);transition:transform .4s cubic-bezier(.4,0,.2,1);padding:10px 14px;z-index:30;overflow-y:auto;display:flex;flex-direction:column;gap:5px}
.mc-drawer.on{transform:translateX(0)}
.mc-drawer-close{position:absolute;top:6px;right:8px;font-size:14px;color:#999;cursor:default}
.mc-drawer-art{height:42px;display:flex;align-items:center;justify-content:center;margin-bottom:2px}
.mc-drawer-art svg{width:48px;height:48px}
.mc-fld{display:flex;flex-direction:column;gap:1px}
.mc-fld-lbl{font-size:8.5px;color:#444;font-weight:500}
.mc-fld-inp{height:18px;border:1px solid #ddd;border-radius:4px;background:#fff;padding:0 6px;font-size:9px;color:#1a1a1a;display:flex;align-items:center;transition:border-color .2s,box-shadow .2s}
.mc-fld-inp.fc{border-color:#4285f4;box-shadow:0 0 0 2px rgba(66,133,244,.1)}
.mc-create-btn{height:24px;background:#4285f4;color:#fff;border:none;border-radius:5px;font-size:10px;font-weight:600;display:flex;align-items:center;justify-content:center;margin-top:5px;cursor:default;transition:background .15s,transform .15s}
.mc-create-btn.press{transform:scale(.97);background:#3367c7}
.mc-toast{position:absolute;top:12px;left:50%;transform:translateX(-50%) translateY(-30px);background:#fff;border-radius:8px;padding:8px 14px;box-shadow:0 4px 16px rgba(0,0,0,.15);font-size:10px;color:#333;display:flex;align-items:center;gap:6px;opacity:0;transition:opacity .3s ease,transform .3s ease;z-index:50}
.mc-toast.on{opacity:1;transform:translateX(-50%) translateY(0)}
.mc-toast-ico{width:14px;height:14px;border-radius:50%;background:#1D9E75;color:#fff;font-size:9px;font-weight:700;display:flex;align-items:center;justify-content:center}

/* ==========================================
   SCENE 3 — Add Multiple Students (CSV)
   ========================================== */
.mc-page-back{font-size:12px;color:#666;cursor:default;margin-bottom:6px}
.mc-page-hdr{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.mc-page-title{font-size:13px;font-weight:700;color:#1a1a1a}
.mc-dl-btn{background:#4285f4;color:#fff;font-size:9px;padding:5px 12px;border-radius:5px;font-weight:600;cursor:default;transition:transform .15s,background .15s}
.mc-dl-btn.hl{background:#3367c7;transform:scale(1.05);box-shadow:0 0 0 3px rgba(66,133,244,.2)}
.mc-upload{background:#f5f8ff;border:1.5px dashed #c4d4f0;border-radius:8px;padding:16px;display:flex;flex-direction:column;align-items:center;gap:6px}
.mc-upload-ico{width:50px;height:50px;background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><rect x='8' y='10' width='28' height='34' rx='3' fill='%23dde7f7'/><rect x='14' y='4' width='28' height='34' rx='3' fill='%23eef3fb' stroke='%23c4d4f0'/><rect x='18' y='10' width='10' height='10' fill='%234285f4'/><circle cx='38' cy='40' r='6' fill='%234285f4'/><path d='M38 36v8M34 40h8' stroke='white' stroke-width='1.5'/></svg>") center/contain no-repeat}
.mc-upload-fmt{font-size:9px;color:#333;font-weight:600}
.mc-upload-mand{font-size:8px;color:#888;text-align:center}
.mc-upload-max{font-size:8px;color:#888}
.mc-upload-browse{font-size:10px;color:#4285f4;font-weight:600;text-decoration:underline;cursor:default;padding:2px 4px;border-radius:3px;transition:background .15s}
.mc-upload-browse.hl{background:#e8f0fe;color:#1a56c7}

/* Preview modal */
.mc-modal-bg{position:absolute;inset:0;background:rgba(0,0,0,.35);opacity:0;pointer-events:none;transition:opacity .25s ease;z-index:40}
.mc-modal-bg.on{opacity:1;pointer-events:auto}
.mc-modal{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(.9);width:88%;background:#fff;border-radius:8px;padding:10px 12px;box-shadow:0 12px 40px rgba(0,0,0,.18);opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;z-index:41}
.mc-modal.on{opacity:1;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}
.mc-modal-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px;font-size:10px;font-weight:600;color:#1a1a1a}
.mc-modal-x{color:#999;font-size:13px;cursor:default}
.mc-pv-thd{display:grid;grid-template-columns:30px 1fr 1.4fr 0.7fr 0.7fr 0.7fr 1fr 30px;font-size:8px;color:#666;font-weight:600;padding:4px 4px;gap:4px;border-bottom:1px solid #f0f0f0}
.mc-pv-row{display:grid;grid-template-columns:30px 1fr 1.4fr 0.7fr 0.7fr 0.7fr 1fr 30px;font-size:8px;padding:4px 4px;gap:4px;align-items:center;border-bottom:1px solid #f8f8f8}
.mc-pv-cell{height:18px;border:1px solid #ddd;border-radius:3px;padding:0 4px;font-size:8px;color:#333;display:flex;align-items:center;background:#fff}
.mc-pv-cell.err{border-color:#e54545;background:#fff5f5}
.mc-pv-no{font-size:8px;color:#666;text-align:center}
.mc-pv-del{width:18px;height:18px;border:1px solid #ddd;border-radius:3px;display:flex;align-items:center;justify-content:center;color:#666;font-size:8px;background:#fff;transition:background .15s,transform .15s}
.mc-pv-del.hl{background:#fde0e0;color:#c44;transform:scale(1.15);border-color:#e54545}
.mc-pv-del svg{width:9px;height:9px}
.mc-pv-error{font-size:8px;color:#e54545;margin-top:5px;font-weight:500;opacity:0;transition:opacity .25s ease}
.mc-pv-error.on{opacity:1}
.mc-pv-foot{display:flex;justify-content:flex-end;margin-top:6px}
.mc-submit-btn{background:#4285f4;color:#fff;font-size:9px;padding:5px 14px;border-radius:5px;font-weight:600;cursor:default;border:none;transition:transform .15s,background .15s,opacity .15s}
.mc-submit-btn.disabled{opacity:.5;background:#bbb}
.mc-submit-btn.press{transform:scale(.97);background:#3367c7}

/* ==========================================
   SCENE 4 — Add From List (institute students)
   ========================================== */
.mc-list-modal{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(.92);width:92%;height:84%;background:#fff;border-radius:8px;padding:10px 12px;box-shadow:0 12px 40px rgba(0,0,0,.18);opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;z-index:41;display:flex;flex-direction:column}
.mc-list-modal.on{opacity:1;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}
.mc-list-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px;font-size:10px;font-weight:700;color:#1a1a1a}
.mc-list-add-btn{background:#4285f4;color:#fff;font-size:9px;padding:5px 12px;border-radius:5px;font-weight:600;cursor:default;opacity:0;transition:opacity .25s ease,transform .15s}
.mc-list-add-btn.on{opacity:1}
.mc-list-add-btn.hl{transform:scale(1.05);box-shadow:0 0 0 3px rgba(66,133,244,.2)}
.mc-list-thd{display:grid;grid-template-columns:24px 0.8fr 1fr 1.5fr 1fr 1fr 0.7fr;font-size:8.5px;color:#666;font-weight:600;padding:4px 4px;gap:4px;border-bottom:1px solid #eee}
.mc-list-thd .sortable{display:flex;align-items:center;gap:2px;transition:color .2s,background .2s;padding:1px 3px;border-radius:3px}
.mc-list-thd .sortable.hl-sort{background:#e8f0fe;color:#4285f4}
.mc-list-rows{flex:1;overflow-y:auto}
.mc-list-row{display:grid;grid-template-columns:24px 0.8fr 1fr 1.5fr 1fr 1fr 0.7fr;font-size:8.5px;padding:5px 4px;gap:4px;align-items:center;border-bottom:1px solid #f5f5f5;transition:background .2s}
.mc-list-row.hl-row{background:#eef4ff}
.mc-list-cb{width:11px;height:11px;border:1.5px solid #ccc;border-radius:2px;display:flex;align-items:center;justify-content:center;background:#fff;transition:background .2s,border-color .2s}
.mc-list-cb.checked{background:#4285f4;border-color:#4285f4;color:#fff;font-size:8px;font-weight:700}
.mc-list-cb.checked::after{content:'\2713'}
.mc-list-add{width:16px;height:16px;border:1px solid #ddd;border-radius:3px;display:flex;align-items:center;justify-content:center;color:#666;font-size:10px;background:#fff;cursor:default;transition:background .2s,border-color .2s,transform .2s,color .2s}
.mc-list-add.hl{background:#e8f0fe;border-color:#4285f4;color:#4285f4;transform:scale(1.2)}

@media(max-width:640px){
  .mc-side{width:72px}
  .mc-pv-thd,.mc-pv-row{grid-template-columns:24px 1fr 1.4fr 0.6fr 0.6fr 0.6fr 0.8fr 24px;font-size:7px}
}