```css
/* =========================================
   SPARDHA IAS — MAINS NOTES LAYOUT
   Wider content, improved typography
   ========================================= */

.mains-page {
    background: #f7f9fc;
    color: #111a2f;
    font-size: 18px;
}

/* Wider page container */
.mains-container {
    width: min(1500px, calc(100% - 64px));
    margin: 0 auto;
    padding: 35px 0 70px;
    box-sizing: border-box;
}

.mains-eyebrow {
    color: #c88700;
    font-size: 13px;
    font-weight: 900;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.mains-title {
    font-size: clamp(34px, 3.2vw, 52px);
    line-height: 1.2;
    margin: 10px 0 22px;
    letter-spacing: -.025em;
    overflow-wrap: anywhere;
}

.mains-subtitle {
    color: #64748b;
    font-size: 18px;
    line-height: 1.8;
    max-width: 1000px;
}

.paper-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.paper-card {
    display: block;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 18px;
    padding: 26px;
    text-decoration: none;
    color: #111a2f;
    transition: .2s;
    box-shadow: 0 12px 35px #0f172a0a;
}

.paper-card:hover {
    transform: translateY(-3px);
    border-color: #e5a900;
}

.paper-number {
    color: #d79700;
    font-weight: 900;
    font-size: 13px;
    letter-spacing: .1em;
}

.paper-card h2 {
    margin: 9px 0 8px;
    line-height: 1.35;
}

.paper-card p {
    margin: 0;
    color: #64748b;
    line-height: 1.7;
}

.notes-list {
    display: grid;
    gap: 14px;
    margin-top: 28px;
}

.note-link {
    display: block;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    padding: 22px;
    text-decoration: none;
    color: #111a2f;
}

.note-link:hover {
    border-color: #e5a900;
}

.note-link small {
    display: block;
    color: #c88700;
    font-weight: 800;
    margin-bottom: 7px;
}

.note-link strong {
    font-size: 19px;
    line-height: 1.5;
}

/* Article + sidebar */
.note-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 245px;
    gap: 28px;
    align-items: start;
}

/* Main reading area */
.mains-content {
    min-width: 0;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 18px;
    padding: clamp(24px, 3vw, 48px);
    font-size: 18px;
    line-height: 1.85;
    overflow-wrap: anywhere;
    box-sizing: border-box;
}

/* Readable paragraph spacing */
.mains-content p {
    margin: 0 0 1.15em;
}

.mains-content li {
    margin-bottom: .45em;
}

.mains-content ul,
.mains-content ol {
    padding-left: 1.5em;
    margin: 0 0 1.2em;
}

.mains-content h2 {
    color: #111a2f;
    font-size: clamp(25px, 2.2vw, 32px);
    line-height: 1.35;
    margin: 1.5em 0 .65em;
}

.mains-content h3 {
    color: #111a2f;
    font-size: clamp(21px, 1.8vw, 25px);
    line-height: 1.4;
    margin: 1.35em 0 .55em;
}

.mains-content h4 {
    font-size: 19px;
    line-height: 1.5;
    margin: 1.2em 0 .5em;
}

.mains-content img {
    max-width: 100%;
    height: auto;
}

.mains-content figure {
    max-width: 100%;
    margin: 24px 0;
}

.mains-content pre {
    max-width: 100%;
    overflow-x: auto;
}

.mains-content blockquote {
    margin: 20px 0;
    padding: 14px 20px;
    border-left: 4px solid #e5a900;
    background: #fffbeb;
    border-radius: 8px;
}

/* Back link and previous/next navigation */
.mains-back {
    display: inline-block;
    margin-bottom: 20px;
    color: #334155;
    text-decoration: none;
    font-weight: 800;
    font-size: 15px;
}

.mains-back:hover {
    color: #c88700;
}

.mains-nav {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 22px;
}

.mains-nav a {
    background: #111a2f;
    color: #fff;
    padding: 12px 18px;
    border-radius: 9px;
    text-decoration: none;
    font-weight: 800;
    font-size: 15px;
}

.mains-nav a:hover {
    background: #c88700;
}

/* Sidebar */
.mains-sidebar {
    min-width: 0;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 20px;
    height: max-content;
    box-sizing: border-box;
}

.mains-sidebar > strong {
    display: block;
    font-size: 17px;
    margin-bottom: 12px;
    line-height: 1.5;
}

.mains-sidebar a {
    display: block;
    padding: 11px 0;
    text-decoration: none;
    color: #334155;
    border-bottom: 1px solid #f1f5f9;
    font-size: 15px;
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.mains-sidebar a:last-child {
    border-bottom: 0;
}

.mains-sidebar a:hover,
.mains-sidebar a.active {
    color: #c88700;
    font-weight: 900;
}

/* Callouts */
.sp-callout {
    padding: 17px 20px;
    background: #fff9e8;
    border-left: 4px solid #e5a900;
    border-radius: 10px;
    margin: 22px 0;
}

.sp-pyq {
    padding: 17px 20px;
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 12px;
    margin: 22px 0;
}

.sp-pyq span {
    font-size: 12px;
    font-weight: 900;
    color: #2563eb;
    letter-spacing: .08em;
}

/* Flow diagrams */
.sp-flow {
    text-align: center;
    margin: 24px auto;
    max-width: 850px;
}

.sp-flow-box {
    display: inline-block;
    max-width: 100%;
    box-sizing: border-box;
    padding: 14px 20px;
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    font-weight: 800;
}

.sp-flow-arrow {
    padding: 6px;
    color: #c88700;
    font-weight: 900;
}

/* Timeline */
.sp-timeline {
    border-left: 3px solid #e5a900;
    padding-left: 18px;
    margin: 24px 0;
}

.sp-timeline > div {
    display: flex;
    gap: 18px;
    padding: 10px 0;
}

.sp-timeline b {
    min-width: 75px;
    color: #c88700;
}

/* Tables: allow horizontal scrolling on narrow screens */
.sp-table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 16px;
    line-height: 1.6;
}

.sp-table th,
.sp-table td {
    border: 1px solid #cbd5e1;
    padding: 12px 14px;
    text-align: left;
    vertical-align: top;
}

.sp-table th {
    background: #f8fafc;
}

/* Bars */
.sp-bars {
    margin: 24px 0;
}

.sp-bar-row {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr) 40px;
    gap: 10px;
    align-items: center;
    margin: 11px 0;
    font-size: 14px;
}

.sp-bar-row > div {
    background: #e2e8f0;
    height: 14px;
    border-radius: 99px;
    overflow: hidden;
}

.sp-bar-row i {
    display: block;
    height: 100%;
    background: #e5a900;
    border-radius: 99px;
}

.sp-map {
    text-align: center;
    margin: 24px 0;
}

.sp-map img {
    max-width: 100%;
    border-radius: 12px;
}

.sp-map figcaption {
    font-size: 13px;
    color: #64748b;
}

.sp-accordion {
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    padding: 13px 16px;
    margin: 16px 0;
}

.sp-accordion summary {
    cursor: pointer;
    font-weight: 800;
}

/* Medium screens */
@media (max-width: 1050px) {
    .mains-container {
        width: calc(100% - 40px);
    }

    .note-layout {
        grid-template-columns: minmax(0, 1fr) 220px;
        gap: 20px;
    }

    .mains-content {
        padding: 28px;
    }
}

/* Tablets and mobile */
@media (max-width: 800px) {
    .mains-container {
        width: calc(100% - 30px);
        padding: 28px 0 45px;
    }

    .paper-grid,
    .note-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .mains-title {
        font-size: clamp(30px, 7vw, 42px);
    }

    .mains-content {
        padding: 22px;
        font-size: 17px;
        line-height: 1.8;
    }

    .mains-content h2 {
        font-size: 25px;
    }

    .mains-content h3 {
        font-size: 21px;
    }

    .mains-sidebar {
        order: 2;
    }

    .mains-nav {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .sp-bar-row {
        grid-template-columns: 85px minmax(0, 1fr) 30px;
    }

    .sp-table {
        display: block;
        overflow-x: auto;
        white-space: normal;
    }

    .sp-timeline > div {
        flex-wrap: wrap;
        gap: 8px 14px;
    }
}

/* Small phones */
@media (max-width: 480px) {
    .mains-container {
        width: calc(100% - 24px);
    }

    .mains-content {
        padding: 17px;
        font-size: 16px;
        line-height: 1.8;
        border-radius: 12px;
    }

    .mains-sidebar {
        padding: 16px;
    }

    .paper-card,
    .note-link {
        padding: 18px;
    }

    .sp-callout,
    .sp-pyq {
        padding: 14px;
    }

    .mains-nav a {
        padding: 10px 13px;
    }
}
```