:root {
    color-scheme: light dark;
    --bg: #f5f7fb;
    --panel: #ffffff;
    --border: #d9dfea;
    --accent: #3c5aa8;
    --accent-soft: rgba(60, 90, 168, 0.1);
    --text: #1c2534;
    --muted: #5d677a;
    --danger: #c0392b;
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.page-header {
    padding: 1.5rem clamp(1rem, 4vw, 4rem);
    background: linear-gradient(120deg, rgba(60, 90, 168, 0.9), rgba(79, 132, 221, 0.8));
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.page-header h1 {
    margin: 0 0 0.5rem;
    font-size: clamp(1.6rem, 3vw, 2.3rem);
}

.page-header p {
    margin: 0;
    max-width: 42rem;
    color: rgba(255, 255, 255, 0.85);
}

.layout {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 1.5rem clamp(1rem, 4vw, 4rem);
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
    flex: 1 1 25rem;
    box-shadow: 0 12px 32px rgba(17, 23, 41, 0.12);
}

.preview-panel {
    flex: 1.2 1 28rem;
    max-width: 58rem;
    display: flex;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

fieldset {
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    display: grid;
    gap: 0.75rem;
}

legend {
    padding: 0 0.5rem;
    font-weight: 600;
    color: var(--accent);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    gap: 0.75rem 1rem;
}

label {
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
    gap: 0.35rem;
    color: var(--muted);
}

input,
textarea,
button {
    font: inherit;
}

input,
textarea {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    transition: border 120ms ease, box-shadow 120ms ease;
    background: #fff;
}

input:focus,
textarea:focus {
    border-color: rgba(60, 90, 168, 0.55);
    box-shadow: 0 0 0 3px var(--accent-soft);
    outline: none;
}

.table-head,
.subject-row {
    display: grid;
    grid-template-columns:
        minmax(3rem, 0.7fr)
        minmax(8rem, 1.8fr)
        repeat(3, minmax(5rem, 1fr))
        1.5rem;
    gap: 0.5rem;
    align-items: center;
}

#subjects {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-x: auto;
}

.table-head {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.subject-row {
    margin-top: 0.65rem;
}

.subject-row input {
    min-width: 0;
}

.obtained-group {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.obtained-group input[name="obtained"] {
    flex: 1;
}

.subject-row.is-ng input[name="obtained"] {
    background: #ffecec;
    border-color: #ff8a80;
    color: #8a1f17;
}

.ng-flag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--danger);
    cursor: pointer;
    user-select: none;
}

.ng-flag input {
    width: 1rem;
    height: 1rem;
}

.subject-row .remove {
    border: none;
    background: transparent;
    font-size: 1.2rem;
    color: var(--danger);
    cursor: pointer;
    line-height: 1;
}

.ghost {
    margin-top: 0.75rem;
    padding: 0.65rem 0.75rem;
    background: transparent;
    border: 1px dashed var(--accent);
    color: var(--accent);
    border-radius: 0.6rem;
    cursor: pointer;
}

.ghost:hover {
    background: var(--accent-soft);
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

.form-actions button {
    padding: 0.7rem 1.2rem;
    border-radius: 0.6rem;
    border: none;
    cursor: pointer;
    transition: transform 120ms ease, box-shadow 120ms ease;
}

.form-actions button:first-child {
    background: var(--accent);
    color: #fff;
}

.form-actions button:first-child:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(60, 90, 168, 0.25);
}

.form-actions button:last-child {
    background: #eef1f8;
    color: var(--muted);
}

.preview {
    background: #fff;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    padding: 1.5rem;
    width: 100%;
    overflow-x: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.placeholder {
    color: var(--muted);
    text-align: center;
    margin: auto;
}

.marksheet-header {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    align-items: center;
}

.school-block {
    background: #fff852;
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid #e5de4d;
    display: grid;
    gap: 0.35rem;
    font-size: 0.95rem;
}

.school-block strong {
    font-size: 1.05rem;
    letter-spacing: 0.04em;
}

.logo-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.logo-wrapper img {
    width: 96px;
    height: 96px;
    object-fit: contain;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    background: #fff;
}

.logo-placeholder {
    width: 96px;
    height: 96px;
    display: grid;
    place-items: center;
    border-radius: 0.5rem;
    border: 1px dashed var(--border);
    background: #f5f7fb;
    color: var(--muted);
    font-size: 0.75rem;
    text-align: center;
    padding: 0.5rem;
}

.student-card {
    padding: 1rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    background: #eef1f8;
}

.student-card h2 {
    margin: 0 0 0.75rem;
    font-size: 1.2rem;
}

.student-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    gap: 0.4rem 1rem;
    font-size: 0.9rem;
}

.score-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.score-table th,
.score-table td {
    border: 1px solid #9ca4bb;
    padding: 0.4rem 0.5rem;
    text-align: center;
}

.score-table thead th {
    background: #d7deef;
    font-weight: 600;
}

.score-table tbody th {
    font-weight: 500;
    text-align: left;
}

.totals {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
    gap: 0.75rem;
}

.totals div {
    background: #eef1f8;
    border-radius: 0.6rem;
    padding: 0.75rem 1rem;
    text-align: center;
}

.totals span {
    display: block;
    font-size: 0.75rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.totals strong {
    font-size: 1.1rem;
}

.remarks {
    padding: 0.75rem 1rem;
    background: #fff7e6;
    border-radius: 0.6rem;
    border: 1px solid #f5d7a1;
}

.signature-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.signature-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.signature-block::before {
    content: "";
    width: 100%;
    border-top: 1px solid var(--border);
    margin-bottom: 0.3rem;
}

@media (max-width: 1024px) {
    .table-head,
    .subject-row {
        min-width: 38rem;
    }
}

@media print {
    body {
        background: #fff;
    }

    .page-header,
    .panel:first-of-type,
    .form-actions {
        display: none !important;
    }

    .layout {
        padding: 0;
    }

    .panel {
        box-shadow: none;
        border: none;
        padding: 0;
    }

    .preview {
        border: none;
        padding: 0;
    }
}