/* ─── Reset & base ────────────────────────────────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --uq-purple: #49075e;
    --uq-purple-dark: #310448;
    --uq-purple-light: #6a1a82;
    --uq-gold: #e6b800;
    --fail-color: #c0392b;
    --text: #333;
    --text-light: #666;
    --border: #ddd;
    --bg: #f5f5f5;
    --white: #fff;
    --shadow: 0 2px 12px rgba(0,0,0,0.12);
    --radius: 8px;
}

html { min-height: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    color: var(--text);
    min-height: 100vh;
    overflow-y: scroll;
    position: relative;
    padding-bottom: 80px;
}

/* ─── Background */
.background-gradient { position: fixed; inset: 0; z-index: -1; background: #51247a; }

/* ─── Layout */
.container { max-width: 920px; margin: 0 auto; padding: 0 16px; }

/* ─── Header */
.header { padding: 36px 0 24px; }
.header-inner { display: flex; align-items: center; gap: 18px; }
.uq-logo {
    width: 60px; height: 60px; background-color: var(--white); border-radius: 12px;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0; box-shadow: var(--shadow);
}
.uq-logo-text { font-size: 22px; font-weight: 800; color: var(--uq-purple); letter-spacing: -1px; }
.site-title { font-size: 28px; font-weight: 700; color: var(--white); line-height: 1.2; }

/* ─── Card */
.card { background: var(--white); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); margin-bottom: 16px; }

/* ─── Courses table + aligned action row (scroll together on narrow viewports) */
.courses-table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.courses-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.courses-table th {
    text-align: left; padding: 5px 7px; font-size: 12px; font-weight: 600;
    color: var(--text-light); text-transform: uppercase; letter-spacing: 0.4px;
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
    background: var(--white);
    z-index: 2;
    box-shadow: 0 1px 0 var(--border);
}
.courses-table td { padding: 3px 7px; border-bottom: 1px solid #f0f0f0; vertical-align: middle; }

/* Shared column widths (both course grid and actions row use identical colgroups) */
.courses-table col.courses-col-course { width: 42%; }
.courses-table col.courses-col-units { width: 68px; }
.courses-table col.courses-col-year { width: 68px; }
.courses-table col.courses-col-grade { width: 118px; }
.courses-table col.courses-col-remove { width: 56px; }

#calc-table tbody tr:last-child td {
    border-bottom: none;
    padding-bottom: 2px;
}

.input-course {
    width: 100%; border: 1px solid var(--border); border-radius: 5px;
    padding: 5px 8px; font-size: 12px; color: var(--text); outline: none; transition: border-color 0.2s;
}
.input-course:focus { border-color: var(--uq-purple); }

.input-units, .input-yearlevel {
    width: 100%; border: 1px solid var(--border); border-radius: 5px;
    padding: 5px 8px; font-size: 12px; color: var(--text); outline: none;
    text-align: left; transition: border-color 0.2s;
}
.input-units:focus, .input-yearlevel:focus { border-color: var(--uq-purple); }
.input-yearlevel::placeholder { color: #bbb; }

/* ─── Actions row: second table shares colgroup so widths track the course grid */
.courses-actions-table {
    margin-top: 8px;
    width: 100%;
}
.courses-actions-table tbody td {
    border-bottom: none;
    vertical-align: middle;
}
.courses-actions-table .btn-add,
.courses-actions-table .btn-upload,
.courses-actions-table .btn-clear {
    width: 100%;
    box-sizing: border-box;
}

.btn-add {
    background: none; border: 2px dashed var(--border); border-radius: var(--radius);
    padding: 9px 10px; font-size: 14px; font-weight: 500; color: var(--text-light); cursor: pointer; transition: all 0.2s;
}
.btn-add:hover { border-color: var(--uq-purple); color: var(--uq-purple); background: rgba(73,7,94,0.04); }

.btn-upload {
    background: none; border: 1.5px solid var(--border); border-radius: var(--radius);
    padding: 8px 8px; font-size: 13px; font-weight: 500; color: var(--text-light); cursor: pointer; transition: all 0.2s;
    line-height: 1.25;
    white-space: normal;
    text-align: center;
}
.btn-upload:hover { border-color: var(--uq-purple); color: var(--uq-purple); background: rgba(73,7,94,0.04); }

.btn-clear {
    background: none; border: 1.5px solid var(--border); border-radius: var(--radius);
    padding: 8px 6px; font-size: 13px; font-weight: 500; color: var(--text-light); cursor: pointer; transition: all 0.2s;
}
.btn-clear:hover { border-color: var(--fail-color); color: var(--fail-color); background: rgba(192,57,43,0.04); }

.upload-status {
    min-height: 1.4em; margin-top: 8px; font-size: 13px; color: var(--text-light);
}
.upload-status.loading { color: var(--uq-purple-light); }
.upload-status.success { color: #1a7a3f; font-weight: 600; }
.upload-status.error   { color: var(--fail-color); }

/* ─── Formula collapsible */
.formula-details { margin-top: 14px; }
.formula-details summary {
    font-size: 13px; color: var(--text-light); cursor: pointer; user-select: none;
    padding: 4px 0; list-style: none; display: flex; align-items: center; gap: 6px;
}
.formula-details summary::before { content: '▶'; font-size: 10px; transition: transform 0.2s; }
.formula-details[open] summary::before { transform: rotate(90deg); }
.formula-details summary::-webkit-details-marker { display: none; }

/* ─── Formula box */
.formula-box {
    background: #f9f4fb; border: 1px solid #e0d0e8; border-radius: var(--radius);
    padding: 14px 18px; margin-top: 10px;
}
.formula-row {
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
    font-size: 15px; font-family: Georgia, 'Times New Roman', serif;
    margin-bottom: 10px;
}
.formula-row:last-of-type { margin-bottom: 0; }
.formula-name { font-size: 14px; min-width: 60px; }
.fraction { display: inline-flex; flex-direction: column; align-items: center; }
.numerator { border-bottom: 1.5px solid var(--text); padding: 2px 6px; font-size: 13px; }
.denominator { padding: 2px 6px; font-size: 13px; }
.formula-note { font-size: 12px; color: var(--text-light); margin-top: 10px; line-height: 1.4; }

/* ─── Grade select */
.select-grade {
    width: 100%; border: 1px solid var(--border); border-radius: 5px;
    padding: 5px 24px 5px 8px; font-size: 12px; color: var(--text); background: var(--white);
    cursor: pointer; outline: none; appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23666'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 8px center; transition: border-color 0.2s;
}
.select-grade:focus { border-color: var(--uq-purple); }

@media (max-width: 879px) {
    .input-course,
    .input-units,
    .input-yearlevel,
    .select-grade {
        min-height: 32px;
    }
}

/* ─── Remove button */
.btn-remove {
    background: none; border: none; cursor: pointer; color: #ccc; font-size: 16px;
    line-height: 1; padding: 2px; border-radius: 4px; transition: color 0.15s;
    display: flex; align-items: center; justify-content: center;
}
.btn-remove:hover { color: var(--fail-color); }

/* ─── Row drag handle next to remove button */
.row-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    white-space: nowrap;
}
.btn-drag {
    border: none;
    background: transparent;
    color: var(--text-light);
    font-size: 12px;
    letter-spacing: -1px;
    cursor: grab;
    padding: 2px 3px;
    border-radius: 4px;
    line-height: 1;
}
.btn-drag:hover {
    color: var(--uq-purple);
    background: rgba(73, 7, 94, 0.06);
}
.btn-drag:active {
    cursor: grabbing;
}
#calc-table tr.dragging {
    opacity: 0.6;
}

/* ─── GPA summary strip (inside main .card) */
.result-summary {
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid #f0f0f0;
}
.result-inner {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    justify-content: flex-start;
    gap: 24px;
}

.result-score {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
    flex: 1 1 0;
    min-width: 0;
    justify-content: flex-start;
}

.result-circle {
    flex-shrink: 0; width: 72px; height: 72px; border-radius: 50%;
    border: 4px solid var(--uq-purple); display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    background: linear-gradient(135deg, rgba(73,7,94,0.06), rgba(73,7,94,0.02)); transition: border-color 0.3s;
}
.result-circle.excellent { border-color: #1a7a3f; }
.result-circle.good      { border-color: #2e86ab; }
.result-circle.average   { border-color: #3d6b9c; }
.result-circle.pass      { border-color: #5a7a5c; }
.result-circle.fail      { border-color: var(--fail-color); }

.result-value { font-size: 19px; font-weight: 700; color: var(--uq-purple); line-height: 1; }
.result-circle.excellent .result-value { color: #1a7a3f; }
.result-circle.good      .result-value { color: #2e86ab; }
.result-circle.average   .result-value { color: #3d6b9c; }
.result-circle.pass      .result-value { color: #5a7a5c; }
.result-circle.fail      .result-value { color: var(--fail-color); }

.result-label { font-size: 11px; font-weight: 600; color: var(--text-light); margin-top: 3px; text-transform: uppercase; letter-spacing: 0.4px; }
.result-title { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.result-details {
    min-width: 0;
}
.result-details p { font-size: 12px; color: var(--text-light); line-height: 1.35; margin-top: 2px; }
.result-details .classification { font-weight: 600; font-size: 13px; margin-top: 4px; }
.classification.excellent { color: #1a7a3f; }
.classification.good      { color: #2e86ab; }
.classification.average   { color: #3d6b9c; }
.classification.pass      { color: #5a7a5c; }
.classification.fail      { color: var(--fail-color); }

/* ─── Honours circle */
#honours-container { flex-shrink: 0; }
.honours-val { font-size: 14px !important; }

.result-circle.honours-1  { border-color: #1a7a3f; }
.result-circle.honours-1  .result-value { color: #1a7a3f; }
.result-circle.honours-2a { border-color: #2e86ab; }
.result-circle.honours-2a .result-value { color: #2e86ab; }
.result-circle.honours-2b { border-color: #3d6b9c; }
.result-circle.honours-2b .result-value { color: #3d6b9c; }
.result-circle.honours-3a { border-color: #e08c3b; }
.result-circle.honours-3a .result-value { color: #e08c3b; }
.result-circle.honours-3b { border-color: var(--fail-color); }
.result-circle.honours-3b .result-value { color: var(--fail-color); }

.classification.honours-1  { color: #1a7a3f; }
.classification.honours-2a { color: #2e86ab; }
.classification.honours-2b { color: #3d6b9c; }
.classification.honours-3a { color: #e08c3b; }
.classification.honours-3b { color: var(--fail-color); }

/* ─── Footer */
.footer { text-align: center; font-size: 12px; color: rgba(255,255,255,0.55); padding: 20px 0; }

.btn-feedback {
    display: inline-block;
    margin-top: 10px;
    padding: 7px 18px;
    border: 1.5px solid rgba(255,255,255,0.45);
    border-radius: 20px;
    color: rgba(255,255,255,0.8);
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.btn-feedback:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.75);
    color: #fff;
}

/* ─── Feedback modal */
.modal-overlay {
    position: fixed; inset: 0; z-index: 100;
    background: rgba(0,0,0,0.55);
    display: flex; align-items: center; justify-content: center;
    padding: 16px;
}
.modal-overlay[hidden] { display: none; }

.modal {
    background: var(--white); border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0,0,0,0.22);
    padding: 28px 28px 24px;
    width: 100%; max-width: 420px;
    position: relative;
}

.modal-close {
    position: absolute; top: 14px; right: 16px;
    background: none; border: none; font-size: 22px; line-height: 1;
    color: var(--text-light); cursor: pointer; padding: 2px 6px; border-radius: 4px;
    transition: color 0.15s;
}
.modal-close:hover { color: var(--text); }

.modal-title { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.modal-subtitle { font-size: 13px; color: var(--text-light); margin-bottom: 18px; }

.form-label {
    display: block; font-size: 13px; font-weight: 600; color: var(--text);
    margin-bottom: 5px; margin-top: 14px;
}
.form-label:first-of-type { margin-top: 0; }
.form-optional { font-weight: 400; color: var(--text-light); }

.form-textarea, .form-input {
    width: 100%; border: 1px solid var(--border); border-radius: 5px;
    padding: 8px 10px; font-size: 14px; font-family: inherit;
    color: var(--text); outline: none; transition: border-color 0.2s;
    resize: vertical;
}
.form-textarea:focus, .form-input:focus { border-color: var(--uq-purple); }
.form-input { resize: none; }

.form-actions { margin-top: 18px; }

.btn-submit {
    width: 100%; padding: 10px;
    background: var(--uq-purple); color: var(--white);
    border: none; border-radius: var(--radius);
    font-size: 14px; font-weight: 600; cursor: pointer;
    transition: background 0.2s;
}
.btn-submit:hover { background: var(--uq-purple-light); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.form-status {
    min-height: 1.4em; margin-top: 10px; font-size: 13px; text-align: center;
}
.form-status.success { color: #1a7a3f; font-weight: 600; }
.form-status.error   { color: var(--fail-color); }

/* ─── Responsive */
@media (max-width: 680px) {
    .container { padding: 0 12px; }
    .header { padding: 24px 0 16px; }
    .site-title { font-size: 22px; }
    .result-summary { padding-bottom: 12px; margin-bottom: 12px; }
    .result-inner {
        justify-content: flex-start;
        gap: 8px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        padding-bottom: 4px;
    }
    .result-score {
        flex: 0 0 auto;
        gap: 8px;
        min-width: min(42vw, 168px);
        justify-content: flex-start;
    }
    .result-circle {
        width: 52px;
        height: 52px;
        border-width: 3px;
    }
    .result-value { font-size: 15px; }
    .honours-val { font-size: 11px !important; }
    .result-label { font-size: 9px; margin-top: 2px; }
    .result-title { font-size: 12px; }
    .result-details p { font-size: 10px; }
}