/* ==========================================================
   School Public Page — group & class listing
   Companion to class-public.css; inherits all --clp-* tokens
   (palette, radii, shadows, easing). Prefix: slp-
   ========================================================== */

.slp-list {
    max-width: 1160px;
    margin: 0 auto;
}

/* ---- Returning-student "Điểm danh" affordances ---------- */
/* Icon inside the hero outline button — inherits button color via currentColor */
.clp-btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: -1px;
}
.clp-btn-icon svg { display: block; }

/* Subtle hint line under the hero actions, for students already enrolled */
.slp-returning {
    margin-top: 4px;
    font-family: var(--clp-font-body);
    font-size: 14px;
    line-height: 1.5;
    letter-spacing: -0.006em;
    color: var(--clp-text-3);
    animation: clp-fade-up 0.8s var(--clp-ease) both;
    animation-delay: 0.5s;
}
.slp-returning a {
    font-weight: 600;
    color: var(--clp-blue-link);
    white-space: nowrap;
    transition: color 0.2s var(--clp-ease);
}
.slp-returning a:hover { color: var(--clp-blue); }

/* ---- Group block ---------------------------------------- */
.slp-group { margin-bottom: clamp(32px, 5vw, 56px); }
.slp-group:last-child { margin-bottom: 0; }

.slp-group-head {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 22px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--clp-border);
}

.slp-group-index {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--clp-radius);
    font-family: var(--clp-font-display);
    font-size: 17px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--clp-blue);
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
    box-shadow: inset 0 0 0 1px rgba(0, 113, 227, 0.16);
}

.slp-group-titles { min-width: 0; flex: 1; }

.slp-group-name {
    font-family: var(--clp-font-display);
    font-size: clamp(20px, 2.6vw, 25px);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--clp-text);
}

.slp-group-desc {
    margin-top: 6px;
    font-family: var(--clp-font-body);
    font-size: 15px;
    line-height: 1.5;
    letter-spacing: -0.008em;
    color: var(--clp-text-2);
    text-wrap: pretty;
}
.slp-group-desc:empty { display: none; }

.slp-group-count {
    flex-shrink: 0;
    align-self: flex-start;
    margin-top: 4px;
    padding: 5px 13px;
    border-radius: var(--clp-radius-pill);
    background: var(--clp-bg);
    border: 1px solid var(--clp-border);
    font-family: var(--clp-font-display);
    font-size: 12.5px;
    font-weight: 600;
    color: var(--clp-text-3);
    white-space: nowrap;
    box-shadow: var(--clp-shadow-xs);
}

/* ---- Class grid ----------------------------------------- */
.slp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: clamp(12px, 1.6vw, 18px);
}

.slp-card {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px;
    background: var(--clp-bg);
    border: 1px solid var(--clp-border);
    border-radius: var(--clp-radius-lg);
    box-shadow: var(--clp-shadow-xs);
    color: inherit;
    overflow: hidden;
    isolation: isolate;
    transition:
        transform 0.3s var(--clp-ease),
        box-shadow 0.3s var(--clp-ease),
        border-color 0.3s var(--clp-ease);
}

.slp-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--clp-blue), var(--clp-green));
    opacity: 0;
    transition: opacity 0.3s var(--clp-ease);
}

a.slp-card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 113, 227, 0.28);
    box-shadow: var(--clp-shadow-md);
}
a.slp-card:hover::before { opacity: 1; }

.slp-card-icon {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 13px;
    font-size: 22px;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(16, 185, 129, 0.12) 100%);
    box-shadow: inset 0 0 0 1px rgba(0, 113, 227, 0.14);
}

.slp-card-body { min-width: 0; flex: 1; }

.slp-card-name {
    font-family: var(--clp-font-display);
    font-size: 16.5px;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.014em;
    color: var(--clp-text);
}

.slp-card-desc {
    margin-top: 5px;
    font-family: var(--clp-font-body);
    font-size: 13.5px;
    line-height: 1.5;
    letter-spacing: -0.006em;
    color: var(--clp-text-3);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.slp-card-desc:empty { display: none; }

.slp-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
}

.slp-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: var(--clp-radius-pill);
    font-family: var(--clp-font-body);
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: -0.004em;
    white-space: nowrap;
}
.slp-tag--public  { background: var(--clp-green-light); color: var(--clp-green-dark); border: 1px solid rgba(16, 185, 129, 0.28); }
.slp-tag--private { background: #fef6ec; color: #b26b3a; border: 1px solid rgba(245, 158, 11, 0.3); }
.slp-tag--muted   { background: var(--clp-bg-alt); color: var(--clp-text-3); border: 1px solid var(--clp-border); }
.slp-tag--theory  { background: #eef4ff; color: var(--clp-blue-link); border: 1px solid rgba(0, 113, 227, 0.22); }
.slp-tag--pending { background: #fdeeee; color: #c0392b; border: 1px solid rgba(192, 57, 43, 0.22); }

.slp-card-go {
    flex-shrink: 0;
    align-self: center;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--clp-font-display);
    font-size: 13px;
    font-weight: 600;
    color: var(--clp-blue-link);
    white-space: nowrap;
}
.slp-card-arrow {
    font-size: 1.15em;
    line-height: 1;
    transition: transform 0.25s var(--clp-ease);
}
a.slp-card:hover .slp-card-arrow { transform: translateX(3px); }

/* Locked (chưa khai giảng) — non-clickable, muted */
.slp-card--locked {
    cursor: default;
    pointer-events: none;
    background: var(--clp-bg-soft);
    border-style: dashed;
    box-shadow: none;
}
.slp-card--locked .slp-card-icon { filter: grayscale(1); opacity: 0.6; }
.slp-card--locked .slp-card-name { color: var(--clp-text-2); }
.slp-card--locked .slp-card-go { color: var(--clp-text-4); }

/* Group with no class yet */
.slp-group-empty {
    padding: 22px;
    border-radius: var(--clp-radius);
    border: 1px dashed var(--clp-border-strong);
    background: var(--clp-bg-soft);
    font-family: var(--clp-font-body);
    font-size: 14px;
    color: var(--clp-text-3);
    text-align: center;
}

/* No groups at all */
.slp-empty {
    max-width: 520px;
    margin: 0 auto;
    text-align: center;
    padding: 48px 28px;
    background: var(--clp-bg);
    border: 1px solid var(--clp-border);
    border-radius: var(--clp-radius-lg);
    box-shadow: var(--clp-shadow-sm);
}
.slp-empty-icon {
    font-size: 40px;
    margin-bottom: 14px;
}
.slp-empty h3 {
    font-family: var(--clp-font-display);
    font-size: 21px;
    font-weight: 600;
    letter-spacing: -0.018em;
    color: var(--clp-text);
    margin-bottom: 8px;
}
.slp-empty p {
    font-family: var(--clp-font-body);
    font-size: 15px;
    line-height: 1.55;
    color: var(--clp-text-2);
}

/* ---- Responsive ----------------------------------------- */
@media (max-width: 734px) {
    .slp-grid { grid-template-columns: 1fr; }
    .slp-group-head { gap: 12px; }
    .slp-group-index { width: 38px; height: 38px; font-size: 15px; }
    .slp-card { flex-wrap: wrap; }
    .slp-card-go { width: 100%; justify-content: flex-end; margin-top: 4px; }
}

@media (prefers-reduced-motion: reduce) {
    .slp-card,
    .slp-card::before,
    .slp-card-arrow { transition: none !important; }
}