/* DigiPrep — yearly / session past-paper picker (extends list chapter styles) */

@import url("lesson-list.css");

h3 {
    font-size: 1rem;
    color: var(--dp-text);
    margin-bottom: 10px;
}

.session-section > h3 {
    margin-bottom: 28px;
}

.session-section:not(:first-child) > h3 {
    margin-top: 40px;
}

.session-section {
    margin-bottom: 36px;
}

.session-section:last-child {
    margin-bottom: 0;
}

.variant-block {
    margin-bottom: 26px;
}

.variant-block:last-child {
    margin-bottom: 0;
}

.variant-heading {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem 0.75rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--dp-text-soft);
    margin-bottom: 18px;
    margin-top: 0;
}

.variant-block:not(:first-child) .variant-heading {
    margin-top: 32px;
}

/* Overall certificate grade — shown once all papers in the variant are marked */
.variant-grade {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.28rem 0.55rem 0.28rem 0.5rem;
    border-radius: 999px;
    border: 1px solid var(--dp-lesson-complete-border);
    background: var(--dp-lesson-complete-bg);
    box-shadow: 0 1px 8px rgba(56, 132, 255, 0.12);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.variant-grade__label {
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--dp-exam-insights-label);
    opacity: 0.92;
}

.variant-grade__letter {
    font-size: 0.9375rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    color: #b8d4ff;
    text-shadow: 0 0 14px rgba(110, 168, 254, 0.28);
}

.variant-grade__score {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--dp-text-soft);
    padding-left: 0.4rem;
    margin-left: 0.05rem;
    border-left: 1px solid rgba(96, 165, 250, 0.35);
}

.variant-grade--enter {
    animation: dp-variant-grade-in 0.52s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes dp-variant-grade-in {
    from {
        opacity: 0;
        transform: translateY(6px) scale(0.94);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Top-tier grades — warmer gold accent on letter */
.variant-grade--astar .variant-grade__letter,
.variant-grade--a .variant-grade__letter {
    color: #fde68a;
    text-shadow: 0 0 14px rgba(251, 191, 36, 0.35);
}

.variant-grade--astar,
.variant-grade--a {
    border-color: rgba(251, 191, 36, 0.45);
    background: rgba(251, 191, 36, 0.1);
    box-shadow: 0 1px 10px rgba(251, 191, 36, 0.1);
}

.variant-grade--astar .variant-grade__score,
.variant-grade--a .variant-grade__score {
    border-left-color: rgba(251, 191, 36, 0.35);
}

/* Pass grades — keep calm blue */
.variant-grade--b .variant-grade__letter,
.variant-grade--c .variant-grade__letter {
    color: #93c5fd;
}

/* Lower pass / fail — muted, still readable */
.variant-grade--d .variant-grade__letter,
.variant-grade--e .variant-grade__letter {
    color: var(--dp-text-soft);
    text-shadow: none;
}

.variant-grade--f .variant-grade__letter,
.variant-grade--g .variant-grade__letter,
.variant-grade--u .variant-grade__letter {
    color: var(--dp-muted);
    text-shadow: none;
}

.variant-grade--d,
.variant-grade--e,
.variant-grade--f,
.variant-grade--g,
.variant-grade--u {
    border-color: var(--dp-border-strong);
    background: var(--dp-fill-subtle);
    box-shadow: none;
}

.variant-grade--d .variant-grade__score,
.variant-grade--e .variant-grade__score,
.variant-grade--f .variant-grade__score,
.variant-grade--g .variant-grade__score,
.variant-grade--u .variant-grade__score {
    border-left-color: var(--dp-border-strong);
}

@media (prefers-reduced-motion: reduce) {
    .variant-grade--enter {
        animation: none;
    }
}

.Session {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    column-gap: 20px;
    row-gap: 28px;
    margin-top: 4px;
}

.Session div {
    background-color: var(--dp-fill-subtle);
    border: 1px solid var(--dp-border);
    border-radius: var(--dp-radius-sm);
    padding: 12px 10px;
    color: var(--dp-text);
    cursor: pointer;
    text-align: center;
    font-weight: 600;
    transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.15s ease;
}

.Session div:hover:not(.paper-placeholder),
.Session div:active:not(.paper-placeholder),
.Session div:focus-visible:not(.paper-placeholder) {
    background-color: var(--dp-fill-hover);
    border-color: var(--dp-text);
    transform: translateY(-2px);
}

.Session div:active:not(.paper-placeholder) {
    transform: translateY(0);
}

.Session div:focus-visible:not(.paper-placeholder) {
    outline: none;
}

.Session .paper-placeholder {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.Session .paper-placeholder:hover {
    background-color: var(--dp-fill-subtle);
    transform: none;
}

/* CS 0478 / Accounting 0452: two papers per variant — center the pair (Bio/Chem use three columns). */
.dp-paper-list-cs .Session,
.dp-paper-list-acc .Session {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: min(100%, calc((100% - 40px) * 2 / 3 + 20px));
    margin-inline: auto;
}