/* EPM Course Materials — locked card grid.
   Reuses the theme tokens (--epm-*, --epm-radius-lg, --epm-shadow*). */

.epm-mat-section{margin:28px 0 0}
.epm-mat-section__head{display:flex;align-items:center;gap:10px;margin:0 0 16px;flex-wrap:wrap}
.epm-mat-section__icon{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:var(--epm-mint2);border:1px solid var(--epm-mint);color:var(--epm);flex-shrink:0}
.epm-mat-section__title{font-size:1.12rem;font-weight:800;color:var(--epm-ink);margin:0}
.epm-mat-section__count{font-size:12px;font-weight:700;color:var(--epm-muted);background:var(--epm-mint2);border:1px solid var(--epm-mint);border-radius:99px;padding:2px 10px}
.epm-mat-section__note{font-size:12.5px;color:var(--epm-muted);margin:0 0 16px;line-height:1.7;display:flex;align-items:center;gap:6px}

.epm-mat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}

.epm-mat{position:relative;background:var(--epm-white);border:1px solid var(--epm-line);border-radius:var(--epm-radius-lg);padding:16px;box-shadow:var(--epm-shadow);transition:transform .25s,box-shadow .25s,border-color .25s;overflow:hidden;display:flex;flex-direction:column;gap:12px}
.epm-mat:hover{transform:translateY(-3px);box-shadow:var(--epm-shadow-lg);border-color:var(--epm-mint)}
.epm-mat.is-open{border-color:var(--epm-mint);box-shadow:0 0 0 3px rgba(0,89,87,.08)}

.epm-mat__top{display:flex;align-items:flex-start;gap:12px}
.epm-mat__icon{flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;background:#fdecec;color:#dc2626;border:1px solid #f7d4d4}
.epm-mat__meta{min-width:0;flex:1}
.epm-mat__name{font-size:.94rem;font-weight:800;color:var(--epm-ink);line-height:1.45;margin:0 0 3px;word-break:break-word}
.epm-mat__size{font-size:12px;color:var(--epm-muted);margin:0}

.epm-mat__tag{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:700;padding:3px 9px;border-radius:99px;margin-top:6px}
.epm-mat__tag--open{background:var(--epm-mint2);color:var(--epm);border:1px solid var(--epm-mint)}
.epm-mat__tag--shut{background:#fef3c7;color:#92400e;border:1px solid #fde68a}

/* Locked state: veil + blur so the file name is not casually readable */
.epm-mat.is-locked{background:linear-gradient(180deg,#fbfbfc,#f5f6f7)}
.epm-mat.is-locked .epm-mat__name{filter:blur(4.5px);opacity:.55;user-select:none}
.epm-mat__veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.25),rgba(255,255,255,.86));display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:14px;text-align:center;opacity:0;transition:opacity .25s}
.epm-mat.is-locked .epm-mat__veil{opacity:1}
.epm-mat__veil-icon{width:40px;height:40px;border-radius:50%;background:#fff;border:1px solid var(--epm-line);box-shadow:var(--epm-shadow-md);display:inline-flex;align-items:center;justify-content:center;color:var(--epm)}
.epm-mat__veil-text{font-size:12.5px;font-weight:700;color:var(--epm-ink);line-height:1.6}
.epm-mat__veil-text small{display:block;font-weight:600;color:var(--epm-muted);font-size:11.5px;margin-top:2px}

.epm-mat__btn{display:flex;align-items:center;justify-content:center;gap:7px;width:100%;padding:10px 14px;border-radius:99px;font-size:13px;font-weight:800;border:1px solid transparent;cursor:pointer;text-decoration:none!important;font-family:inherit;transition:all .22s}
.epm-mat__btn--open{background:var(--epm);color:#fff}
.epm-mat__btn--open:hover{background:var(--epm-dark);box-shadow:0 6px 14px rgba(0,89,87,.3)}
.epm-mat__btn--shut{background:var(--epm-mint2);color:var(--epm-dark);border-color:var(--epm-mint)}
.epm-mat__btn--shut:hover{background:#fff;border-color:var(--epm);color:var(--epm)}
.epm-mat__btn.is-busy{opacity:.6;pointer-events:none}
.epm-mat__btn.is-busy::after{content:"";width:13px;height:13px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:epmMatSpin .6s linear infinite}
@keyframes epmMatSpin{to{transform:rotate(360deg)}}

.epm-mat.is-shake{animation:epmMatShake .45s}
@keyframes epmMatShake{0%,100%{transform:translateX(0)}20%{transform:translateX(-6px)}40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(4px)}}

/* Toast */
.epm-mat-toast{position:fixed;inset-inline:0;bottom:calc(var(--epm-bottomnav,68px) + 18px);margin:0 auto;width:max-content;max-width:min(92vw,440px);padding:13px 18px;border-radius:14px;background:var(--epm-ink);color:#fff;font-size:13.5px;font-weight:700;line-height:1.65;box-shadow:0 12px 30px rgba(0,0,0,.24);z-index:99999;opacity:0;transform:translateY(14px);transition:opacity .3s,transform .3s;text-align:center}
.epm-mat-toast.is-in{opacity:1;transform:translateY(0)}
.epm-mat-toast.is-warn{background:#92400e}
.epm-mat-toast.is-error{background:#991b1b}
.epm-mat-toast a{color:#fff;text-decoration:underline}

@media(max-width:640px){.epm-mat-grid{grid-template-columns:1fr}}