:root {
    --notebook-border: rgba(184, 115, 51, 0.35);
    --notebook-accent: #B87333;
}

.notebook-page {
    background: var(--white);
    color: var(--black);
}

.notebook-hero {
    border-bottom: 2px solid rgba(184, 115, 51, 0.35);
    padding: 72px 1.5rem 60px;
    background: var(--black);
    color: var(--white);
}

.notebook-hero-inner {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.notebook-hero .eyebrow {
    font-size: 0.75rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--slate);
    margin-bottom: 0.5rem;
}

.notebook-hero h1 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    text-transform: uppercase;
    letter-spacing: 4px;
    margin: 0 0 0.75rem;
    font-weight: 800;
}

.notebook-hero .hero-subtitle {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #d0d0d0;
    max-width: 800px;
    margin: 0 auto;
}

.notebook-main {
    padding: 2rem 1.5rem 3rem;
}

.notebook-layout {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
}

.panel {
    border: 1px solid var(--notebook-border);
    padding: 1.75rem;
    background: var(--white);
}

.panel-header h2 {
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
}

.panel-header p {
    color: var(--slate);
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
}

.field-label {
    display: block;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.notes-textarea {
    width: 100%;
    min-height: 320px;
    padding: 1rem;
    border: 1px solid var(--notebook-border);
    font-family: "Inter", sans-serif;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--black);
    resize: vertical;
}

.upload-zone {
    margin-top: 1rem;
    border: 1px dashed var(--notebook-border);
    padding: 1rem;
    text-align: center;
}

.upload-zone.drag-over {
    border-color: var(--notebook-accent);
    background: rgba(184, 115, 51, 0.06);
}

.upload-text {
    font-size: 0.8rem;
    color: var(--slate);
    margin-bottom: 0.75rem;
}

.upload-button {
    display: inline-block;
    border: 1px solid var(--black);
    background: var(--black);
    color: var(--white);
    padding: 0.55rem 1.1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.65rem;
    font-weight: 700;
    cursor: pointer;
}

.upload-button:hover {
    background: rgba(184, 115, 51, 0.12);
    color: var(--black);
    border-color: var(--notebook-accent);
}

.file-input {
    display: none;
}

.file-list {
    margin-top: 1rem;
    border: 1px solid var(--notebook-border);
    padding: 0.75rem 1rem;
}

.file-list-title {
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.65rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.file-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.8rem;
    color: var(--slate);
}

.file-list li {
    padding: 0.25rem 0;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.btn-action {
    border: 1px solid var(--black);
    background: var(--black);
    color: var(--white);
    padding: 0.65rem 1.2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.7rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.btn-action:hover {
    background: rgba(184, 115, 51, 0.12);
    color: var(--black);
    border-color: var(--notebook-accent);
}

.session-row {
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--slate);
}

.alert-panel {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    border: 1px solid var(--notebook-border);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.alert-item {
    text-align: center;
    background: transparent;
    border: 1px solid var(--notebook-border);
    padding: 0.75rem;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.alert-item:hover {
    border-color: var(--notebook-accent);
    background: rgba(184, 115, 51, 0.06);
}

.alert-label {
    display: block;
    text-transform: uppercase;
    font-size: 0.65rem;
    letter-spacing: 1.5px;
    color: var(--slate);
}

.alert-value {
    font-size: 1.4rem;
    font-weight: 700;
}


.output-sections {
    display: grid;
    gap: 1.5rem;
}

.output-section {
    border: 1px solid var(--notebook-border);
    padding: 1rem;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.section-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.section-header h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.muted {
    color: var(--slate);
    font-size: 0.75rem;
}

.alias-list {
    margin-top: 0.75rem;
    border-top: 1px solid var(--notebook-border);
    padding-top: 0.75rem;
    font-size: 0.75rem;
}

.alias-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.alias-list li {
    margin-bottom: 0.4rem;
}

.alias-list label {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.alias-checkbox {
    accent-color: var(--notebook-accent);
}

.btn-copy {
    border: 1px solid var(--notebook-border);
    background: var(--white);
    color: var(--black);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 0.4rem 0.7rem;
    cursor: pointer;
}

.section-body {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--black);
}

.section-body ul {
    margin: 0;
    padding-left: 1.2rem;
}

.section-body li {
    margin-bottom: 0.4rem;
}

.timeline-list {
    position: relative;
    padding-left: 1.5rem;
    border-left: 1px solid var(--notebook-accent);
}

.timeline-item {
    position: relative;
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -1.05rem;
    top: 0.4rem;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--notebook-accent);
}

.conflict-text {
    color: #b30000;
    font-weight: 600;
}

.issue-highlight {
    padding: 0.4rem 0.5rem;
    border-radius: 4px;
}

.issue-highlight.conflict {
    background: rgba(179, 0, 0, 0.08);
}

.issue-highlight.duplicate {
    background: rgba(184, 115, 51, 0.12);
}

.issue-highlight.uncertain {
    background: rgba(255, 204, 0, 0.15);
}

.issue-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.issue-nav button {
    border: 1px solid var(--notebook-border);
    background: var(--white);
    color: var(--black);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.6rem;
    padding: 0.3rem 0.5rem;
    cursor: pointer;
}

.export-panel {
    margin-top: 2rem;
    border: 1px solid var(--notebook-border);
    padding: 1rem;
}

.export-panel h3 {
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.export-note {
    font-size: 0.75rem;
    color: var(--slate);
    margin-top: 0.75rem;
}

@media (max-width: 1024px) {
    .notebook-layout {
        grid-template-columns: 1fr;
    }

    .split-view {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .alert-panel {
        grid-template-columns: 1fr;
    }

    .button-row {
        flex-direction: column;
        align-items: stretch;
    }
}