/* ==========================================================================
   nonri.xyz — Dark-Academia Scholarly Manuscript
   Palette: Midnight Navy, Antique Brass, Parchment, Slate Blue, Tarnished Silver, Crimson Seal
   ========================================================================== */

/* --- Custom Properties --- */
:root {
    --midnight-navy: #0D1B2A;
    --antique-brass: #C9A84C;
    --parchment: #E8DCC8;
    --slate-blue: #415A77;
    --tarnished-silver: #8E9AAF;
    --crimson-seal: #8B2F3A;

    --font-display: 'Cormorant Garamond', 'Georgia', serif;
    --font-body: 'EB Garamond', 'Georgia', serif;
    --font-marginalia: 'Libre Franklin', 'Helvetica Neue', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--midnight-navy);
    color: var(--parchment);
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.8;
    font-weight: 400;
    overflow-x: hidden;
}

/* --- Running Header --- */
.running-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(13, 27, 42, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    opacity: 0;
    transform: translateY(-100%);
    transition: opacity 0.4s ease, transform 0.4s ease;
    border-bottom: 1px solid rgba(201, 168, 76, 0.15);
}

.running-header--visible {
    opacity: 1;
    transform: translateY(0);
}

.running-header__chapter {
    font-family: var(--font-marginalia);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--tarnished-silver);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    background-color: var(--midnight-navy);
    overflow: hidden;
}

.hero__content {
    position: absolute;
    top: 61.8%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 6vw, 5.6rem);
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--parchment);
    margin-bottom: 1.2rem;
}

.hero__rule {
    width: 200px;
    height: 2px;
    margin: 0 auto 1rem;
    display: block;
}

.hero__rule line {
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    animation: drawRule 1.5s ease-out 0.5s forwards;
}

@keyframes drawRule {
    to {
        stroke-dashoffset: 0;
    }
}

.hero__subtitle {
    font-family: var(--font-marginalia);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--tarnished-silver);
}

/* --- Chapter Sections --- */
.chapter {
    position: relative;
    padding: 6rem 0;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.chapter--visible {
    opacity: 1;
    transform: translateY(0);
}

.chapter__grid {
    display: grid;
    grid-template-columns: 1fr;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
}

@media (min-width: 768px) {
    .chapter__grid {
        grid-template-columns: 200px 1fr;
        gap: 3rem;
    }

    .chapter--offset-right .chapter__grid {
        grid-template-columns: 1fr 200px;
    }
}

/* --- Chapter Heading Group --- */
.chapter__heading-group {
    text-align: center;
    margin-bottom: 2.5rem;
}

.ornament {
    width: 40px;
    height: 40px;
    display: block;
    margin: 0 auto 1rem;
}

.chapter__number {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 2.5vw, 2.8rem);
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--antique-brass);
    margin-bottom: 0.5rem;
}

.chapter__title {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    font-weight: 400;
    font-style: italic;
    color: var(--parchment);
    letter-spacing: 0.01em;
}

/* --- Chapter Body --- */
.chapter__body p {
    margin-bottom: 1.5rem;
    text-align: justify;
    hyphens: auto;
    -webkit-hyphens: auto;
}

.chapter__body p:last-child {
    margin-bottom: 0;
}

/* --- Drop Cap --- */
.drop-cap {
    float: left;
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 600;
    line-height: 0.8;
    color: var(--antique-brass);
    padding: 0.1em 0.15em 0 0;
}

/* --- Marginalia --- */
.marginalia {
    position: relative;
    padding: 1rem 0;
}

@media (min-width: 768px) {
    .marginalia--left {
        order: -1;
        margin-left: -8vw;
        text-align: right;
        padding-right: 1.5rem;
        border-right: 1px solid rgba(201, 168, 76, 0.2);
    }

    .marginalia--right {
        margin-right: -5vw;
        text-align: left;
        padding-left: 1.5rem;
        border-left: 1px solid rgba(201, 168, 76, 0.2);
    }
}

@media (max-width: 767px) {
    .marginalia {
        background-color: rgba(65, 90, 119, 0.15);
        padding: 1rem 1.2rem;
        margin: 1.5rem 0;
        border-left: 2px solid var(--antique-brass);
    }
}

.marginalia__marker {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--antique-brass);
    vertical-align: super;
    margin-bottom: 0.5rem;
}

.marginalia__text {
    font-family: var(--font-marginalia);
    font-size: 0.8rem;
    line-height: 1.6;
    letter-spacing: 0.03em;
    color: var(--tarnished-silver);
    font-weight: 400;
}

/* --- Interlude --- */
.interlude {
    background-color: var(--slate-blue);
    padding: 4rem 2rem;
    margin: 2rem 0;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.interlude--visible {
    opacity: 1;
    transform: translateY(0);
}

.interlude__content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.interlude__rule {
    border: none;
    height: 1px;
    background-color: var(--antique-brass);
    width: 80px;
    margin: 0 auto;
}

.interlude__rule--top {
    margin-bottom: 2rem;
}

.interlude__rule--bottom {
    margin-top: 2rem;
}

.interlude__quote {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    font-weight: 400;
    font-style: italic;
    color: var(--parchment);
    line-height: 1.6;
    letter-spacing: 0.01em;
}

.interlude__cite {
    display: block;
    margin-top: 1rem;
    font-family: var(--font-marginalia);
    font-size: 0.75rem;
    font-style: normal;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tarnished-silver);
}

/* --- Chapter Offsets & Overlaps --- */
@media (min-width: 768px) {
    .chapter--offset-right .chapter__grid {
        margin-left: 5vw;
    }

    .chapter--overlap {
        margin-top: -3rem;
        z-index: 2;
    }
}

/* --- Content Border Animations --- */
.chapter__main {
    position: relative;
    padding: 2rem;
    border: 1px solid rgba(142, 154, 175, 0.15);
    transition: border-color 0.5s ease;
}

.chapter__main:hover {
    border-color: var(--antique-brass);
}

/* --- Section Dividers --- */
.chapter + .interlude,
.interlude + .chapter {
    position: relative;
}

/* --- Footer --- */
.footer {
    padding: 4rem 2rem;
    background-color: var(--midnight-navy);
    text-align: center;
    border-top: 1px solid rgba(201, 168, 76, 0.1);
}

.footer__content {
    max-width: 400px;
    margin: 0 auto;
}

.footer__endmark {
    width: 30px;
    height: 30px;
    display: block;
    margin: 0 auto 1.5rem;
}

.footer__domain {
    font-family: var(--font-marginalia);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--tarnished-silver);
    margin-bottom: 0.25rem;
}

.footer__year {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    color: rgba(142, 154, 175, 0.5);
}

/* --- Scrollbar Styling --- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--midnight-navy);
}

::-webkit-scrollbar-thumb {
    background: var(--slate-blue);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--antique-brass);
}

/* --- Selection --- */
::selection {
    background-color: var(--crimson-seal);
    color: var(--parchment);
}

/* --- Responsive Adjustments --- */
@media (max-width: 767px) {
    .hero__content {
        padding: 0 1.5rem;
    }

    .chapter {
        padding: 3rem 0;
    }

    .chapter__grid {
        padding: 0 1rem;
    }

    .chapter__main {
        padding: 1.5rem;
    }

    .interlude {
        padding: 2.5rem 1.5rem;
    }

    .chapter--offset-right .chapter__grid {
        margin-left: 0;
    }

    .chapter--overlap {
        margin-top: 0;
    }
}