/* ==========================================================================
   Kanhao (Alex) Zhao — site layer
   Sits on top of the Start Bootstrap "Resume" base in css/styles.css.
   Palette keeps the existing guofeng warmth: rice-paper ground, cinnabar accent.
   ========================================================================== */

:root {
    --paper: #f6f1e6;
    --paper-raised: #fffdf7;
    --ink: #2b2620;
    --ink-soft: #5d554a;
    --ink-faint: #8c8377;
    --cinnabar: #bd5d38;
    --cinnabar-deep: #9c452a;
    --seal: #a8321f;
    --rule: rgba(43, 38, 32, 0.13);
    --rule-strong: rgba(43, 38, 32, 0.26);
    --shadow-sm: 0 1px 2px rgba(43, 38, 32, 0.05), 0 6px 18px rgba(43, 38, 32, 0.06);
    --shadow-md: 0 2px 6px rgba(43, 38, 32, 0.07), 0 16px 40px rgba(43, 38, 32, 0.09);
    --serif: "Noto Serif SC", Georgia, "Times New Roman", serif;
    --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* --- base overrides ------------------------------------------------------ */

body {
    background-color: var(--paper);
    background-image:
        radial-gradient(circle at 50% -12%, rgba(189, 93, 56, 0.07), transparent 58%),
        radial-gradient(circle at 100% 100%, rgba(189, 93, 56, 0.04), transparent 45%);
    background-attachment: fixed;
    color: var(--ink);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* the base theme uppercases every heading; we opt in instead of out */
h1, .h1, h2, .h2, h3, .h3, h4, .h4, h5, .h5, h6, .h6 {
    font-family: var(--serif);
    text-transform: none;
    color: var(--ink);
    letter-spacing: -0.01em;
}

a {
    color: var(--cinnabar-deep);
    text-decoration-color: rgba(189, 93, 56, 0.35);
    text-underline-offset: 0.18em;
}
a:hover {
    color: var(--seal);
}

hr.m-0 {
    height: 1px;
    border: none;
    opacity: 1;
    background: linear-gradient(to right, transparent, var(--rule-strong), transparent);
}

section.resume-section {
    max-width: 78rem;
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
}

@media (max-width: 767.98px) {
    section.resume-section {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }
}

/* --- shared type helpers ------------------------------------------------- */

.eyebrow {
    font-family: var(--sans);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--cinnabar);
    margin-bottom: 0.8rem;
}

.section-title {
    font-size: clamp(1.8rem, 1.2rem + 1.8vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.section-lede {
    font-size: 1.1rem;
    color: var(--ink-soft);
    max-width: 46rem;
    margin-bottom: 2.2rem;
}

.rule-short {
    width: 3.5rem;
    height: 3px;
    border-radius: 2px;
    background: var(--cinnabar);
    margin-bottom: 1.3rem;
}

/* --- sidebar nav --------------------------------------------------------- */

#sideNav {
    background-color: var(--cinnabar) !important;
    background-image: linear-gradient(170deg, #c56a44 0%, #a94d2c 100%);
}
#sideNav .navbar-nav .nav-item .nav-link {
    font-family: var(--sans);
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    padding-top: 0.42rem;
    padding-bottom: 0.42rem;
    color: rgba(255, 255, 255, 0.82);
}
#sideNav .navbar-nav .nav-item .nav-link:hover,
#sideNav .navbar-nav .nav-item .nav-link.active {
    color: #fff;
}
@media (min-width: 992px) {
    #sideNav .navbar-brand .img-profile {
        max-width: 8.5rem;
        max-height: 8.5rem;
        border: 0.4rem solid rgba(255, 255, 255, 0.22);
    }
}

/* ==========================================================================
   1 · Hero
   ========================================================================== */

#hero .hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 3.5rem;
    align-items: center;
}

.hero-name {
    font-size: clamp(2.3rem, 1.4rem + 3vw, 3.5rem);
    font-weight: 700;
    line-height: 1.12;
    margin-bottom: 0.4rem;
}
.hero-name .given {
    color: var(--cinnabar);
}

.hero-affil {
    font-family: var(--sans);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--ink-soft);
    margin-bottom: 2.4rem;
}

.hero-statement {
    font-family: var(--serif);
    font-size: clamp(1.45rem, 1rem + 1.6vw, 2.1rem);
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 1.4rem;
    max-width: 24ch;
}

.hero-question {
    font-size: 1.12rem;
    line-height: 1.75;
    color: var(--ink);
    border-left: 3px solid var(--cinnabar);
    padding-left: 1.1rem;
    max-width: 40rem;
    margin-bottom: 1.4rem;
}

.hero-approach {
    font-size: 1.02rem;
    color: var(--ink-soft);
    max-width: 40rem;
    margin-bottom: 2.2rem;
}

.hero-portrait {
    /* no aspect-ratio and no object-fit: the image keeps its own
       intrinsic ratio, so the frame can never crop the supplied photo */
    width: 14rem;
    height: auto;
    display: block;
    border-radius: 14px;
    box-shadow: var(--shadow-md);
    border: 0.4rem solid var(--paper-raised);
    outline: 1px solid var(--rule);
    outline-offset: -0.4rem;
}

.hero-meta {
    font-size: 0.95rem;
    color: var(--ink-soft);
    margin-bottom: 1.5rem;
}
.hero-meta span + span::before {
    content: "·";
    margin: 0 0.6rem;
    color: var(--ink-faint);
}

@media (max-width: 991.98px) {
    #hero .hero-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 2rem;
    }
    .hero-portrait {
        width: 10.5rem;
        order: -1;
    }
}

/* social icons (base theme circles, retinted) */
.social-icons .social-icon {
    height: 2.9rem;
    width: 2.9rem;
    font-size: 1.15rem;
    background-color: var(--ink);
    margin-right: 0.9rem;
    transition: background-color 0.2s ease, transform 0.2s ease;
}
.social-icons .social-icon:hover {
    background-color: var(--cinnabar);
    transform: translateY(-2px);
}
.social-icons .social-icon img {
    height: 1.35rem;
    filter: brightness(0) invert(1);
}

/* ==========================================================================
   2 · Scientific Vision
   ========================================================================== */

.vision-panel {
    border: 1px solid var(--rule-strong);
    border-radius: 16px;
    background: var(--paper-raised);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.vision-flow {
    padding: 2.2rem 2rem 1.9rem;
    text-align: center;
}

.flow-band {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.5rem 0.85rem;
}

.flow-chip {
    font-family: var(--sans);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    color: var(--ink-soft);
    padding: 0.35rem 0.95rem;
    border: 1px solid var(--rule);
    border-radius: 999px;
    background: rgba(246, 241, 230, 0.7);
    white-space: nowrap;
}

.flow-band-label {
    font-family: var(--sans);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 0.9rem;
}

.flow-arrow {
    font-size: 1.5rem;
    line-height: 1;
    color: var(--cinnabar);
    margin: 1rem 0;
    opacity: 0.8;
}

.flow-core {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 0.6rem;
    flex-wrap: nowrap;
}

.core-node {
    flex: 0 1 12rem;
    padding: 1.15rem 0.75rem;
    border: 2px solid var(--cinnabar);
    border-radius: 12px;
    background: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.35rem;
    box-shadow: 0 6px 20px rgba(189, 93, 56, 0.1);
}
.core-node .core-label {
    font-family: var(--serif);
    font-size: clamp(1.25rem, 0.9rem + 1.1vw, 1.8rem);
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--cinnabar-deep);
}
.core-node .core-sub {
    font-family: var(--sans);
    font-size: 0.78rem;
    color: var(--ink-faint);
    letter-spacing: 0.02em;
}

.core-arrow {
    align-self: center;
    font-size: 1.6rem;
    color: var(--cinnabar);
    padding: 0 0.25rem;
}

.vision-ai-band {
    border-top: 1px solid var(--rule-strong);
    background: linear-gradient(to right, rgba(189, 93, 56, 0.1), rgba(189, 93, 56, 0.18), rgba(189, 93, 56, 0.1));
    padding: 1rem 1.5rem;
    text-align: center;
    font-family: var(--sans);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--cinnabar-deep);
}

.vision-caption {
    margin-top: 1.6rem;
    text-align: center;
    font-family: var(--serif);
    font-size: clamp(1.05rem, 0.9rem + 0.6vw, 1.35rem);
    font-style: italic;
    color: var(--ink-soft);
}

@media (max-width: 767.98px) {
    .vision-flow {
        padding: 2rem 1.1rem;
    }
    .flow-core {
        flex-direction: column;
        align-items: stretch;
        gap: 0.4rem;
    }
    .core-node {
        flex: 1 1 auto;
        padding: 1rem 0.75rem;
    }
    .core-arrow {
        transform: rotate(90deg);
        padding: 0;
    }
    .flow-arrow {
        margin: 1rem 0;
    }
}

/* ==========================================================================
   3 · Research
   ========================================================================== */

.research-grid {
    display: grid;
    gap: 1.25rem;
}

.research-card {
    display: grid;
    grid-template-columns: 3.5rem minmax(0, 1fr);
    gap: 0 1.5rem;
    padding: 1.6rem 1.8rem;
    border: 1px solid var(--rule);
    border-left: 4px solid var(--cinnabar);
    border-radius: 12px;
    background: var(--paper-raised);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.research-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.research-num {
    font-family: var(--serif);
    font-size: 1.6rem;
    font-weight: 700;
    color: rgba(189, 93, 56, 0.35);
    line-height: 1.2;
    grid-row: 1 / span 3;
}

.research-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.45rem;
}

.research-q {
    color: var(--ink-soft);
    font-size: 1.02rem;
    margin-bottom: 1rem;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.tag {
    font-family: var(--sans);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    background: rgba(189, 93, 56, 0.09);
    color: var(--cinnabar-deep);
    border: 1px solid rgba(189, 93, 56, 0.18);
}

@media (max-width: 575.98px) {
    .research-card {
        grid-template-columns: minmax(0, 1fr);
        padding: 1.4rem 1.2rem;
    }
    .research-num {
        grid-row: auto;
        margin-bottom: 0.3rem;
    }
}

/* ==========================================================================
   4 · Selected Work
   ========================================================================== */

.work-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 2.5rem;
}

.work-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
}

.work-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem 1rem;
}

.work-title {
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.35;
    margin: 0;
}
.work-title a {
    color: var(--ink);
    text-decoration: none;
    border-bottom: 2px solid rgba(189, 93, 56, 0.25);
    transition: border-color 0.2s ease, color 0.2s ease;
}
.work-title a:hover {
    color: var(--cinnabar-deep);
    border-bottom-color: var(--cinnabar);
}

.work-venue {
    font-family: var(--sans);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--cinnabar);
    white-space: nowrap;
}
.work-venue.is-preprint {
    color: var(--ink-faint);
}

.work-if {
    font-family: var(--sans);
    font-size: 0.74rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--ink-faint);
    padding: 0.1rem 0.5rem;
    border: 1px solid var(--rule);
    border-radius: 999px;
    background: rgba(246, 241, 230, 0.8);
    white-space: nowrap;
}

.work-summary {
    color: var(--ink-soft);
    font-size: 1.02rem;
    margin: 0;
    max-width: 52rem;
}

.work-note {
    margin: -0.4rem 0 0;
    font-size: 0.88rem;
    font-style: italic;
    color: var(--ink-faint);
}

.work-thumb {
    width: 100%;
    max-width: 860px;
    height: auto;
    border: 1px solid var(--rule);
    border-radius: 10px;
    background: #fff;
    padding: 8px;
    box-shadow: var(--shadow-sm);
}

.work-secondary {
    margin-top: 3.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--rule);
}
.work-secondary h3 {
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
}
.work-secondary ul {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem;
    display: grid;
    gap: 0.55rem;
}
.work-secondary li {
    font-size: 0.97rem;
    color: var(--ink-soft);
}
.work-secondary li .work-venue {
    margin-left: 0.5rem;
}
.work-authors {
    display: block;
    font-size: 0.85rem;
    color: var(--ink-faint);
}
.work-authors strong {
    color: var(--ink-soft);
    font-weight: 600;
}

.scholar-link {
    font-family: var(--sans);
    font-size: 0.95rem;
    font-weight: 600;
}

/* ==========================================================================
   5 · Future Directions
   ========================================================================== */

.future-grid {
    display: grid;
    gap: 2rem;
}

.future-card {
    position: relative;
    padding: 2.1rem 1.7rem 1.9rem;
    border: 1px solid var(--rule-strong);
    border-radius: 14px;
    background: var(--paper-raised);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.future-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: linear-gradient(to right, var(--cinnabar), rgba(189, 93, 56, 0.25));
}
.future-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.future-index {
    font-family: var(--sans);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--cinnabar);
    margin-bottom: 0.9rem;
}

.future-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 0.8rem;
}

.future-q {
    color: var(--ink-soft);
    font-size: 1rem;
    max-width: 46rem;
    margin-bottom: 0;
}

.future-note {
    margin-top: 1.4rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--rule);
    font-size: 0.87rem;
    color: var(--ink-faint);
}

/* --- direction schematics ------------------------------------------------ */

.future-figure {
    margin: 1.6rem 0 0;
    min-width: 0;
}
.future-figure a {
    display: block;
    border-radius: 10px;
}
.future-figure img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--rule);
    border-radius: 10px;
    background: #fff;
    padding: 8px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}
.future-figure a:hover img,
.future-figure a:focus-visible img {
    box-shadow: var(--shadow-md);
}
.future-figure figcaption {
    margin-top: 0.7rem;
    font-family: var(--sans);
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--ink-faint);
}

@media (max-width: 575.98px) {
    .future-card {
        padding: 1.8rem 1.1rem 1.5rem;
    }
    .future-figure img {
        padding: 5px;
    }
}

/* ==========================================================================
   6 · About
   ========================================================================== */

.about-body p {
    font-size: 1.08rem;
    color: var(--ink);
    max-width: 48rem;
    margin-bottom: 1.3rem;
}
.about-body p.muted {
    color: var(--ink-soft);
    font-size: 1rem;
}

.fact-row {
    display: grid;
    grid-template-columns: 9.5rem minmax(0, 1fr);
    gap: 0.5rem 1.5rem;
    padding: 1rem 0;
    border-top: 1px solid var(--rule);
    align-items: baseline;
}
.fact-row:last-of-type {
    border-bottom: 1px solid var(--rule);
}
.fact-label {
    font-family: var(--sans);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--ink-faint);
}
.fact-value {
    font-size: 0.99rem;
    color: var(--ink-soft);
}

@media (max-width: 575.98px) {
    .fact-row {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* ==========================================================================
   7 · Journey
   ========================================================================== */

.journey {
    list-style: none;
    padding: 0;
    margin: 0 0 2.5rem;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1rem;
}

.journey-stop {
    position: relative;
    text-align: center;
    padding: 0 0.4rem;
}
.journey-stop:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 2.6rem;
    left: calc(50% + 2.9rem);
    right: calc(-50% + 2.9rem);
    border-top: 2px dashed rgba(189, 93, 56, 0.4);
}

.journey-logo {
    width: 5.2rem;
    height: 5.2rem;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--paper-raised);
    border: 1px solid var(--rule);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem;
    position: relative;
    z-index: 1;
}
.journey-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.journey-year {
    font-family: var(--sans);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    color: var(--cinnabar);
    margin-bottom: 0.3rem;
}
.journey-place {
    font-family: var(--serif);
    font-size: 1.02rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.25rem;
}
.journey-role {
    font-size: 0.85rem;
    color: var(--ink-soft);
    margin-bottom: 0.45rem;
}
.journey-note {
    font-size: 0.82rem;
    font-style: italic;
    color: var(--ink-faint);
}

.journey-arc {
    text-align: center;
    font-family: var(--serif);
    font-size: clamp(0.95rem, 0.8rem + 0.5vw, 1.15rem);
    letter-spacing: 0.04em;
    color: var(--ink-soft);
    padding: 1rem 1.2rem;
    border: 1px dashed var(--rule-strong);
    border-radius: 10px;
    background: rgba(255, 253, 247, 0.6);
}
.journey-arc strong {
    color: var(--cinnabar-deep);
    font-weight: 600;
}

@media (max-width: 991.98px) {
    .journey {
        grid-template-columns: minmax(0, 1fr);
        gap: 0;
        border-left: 2px dashed rgba(189, 93, 56, 0.4);
        margin-left: 2.6rem;
        padding-left: 1.8rem;
    }
    .journey-stop {
        text-align: left;
        padding: 0 0 2rem;
    }
    .journey-stop:not(:last-child)::after {
        display: none;
    }
    .journey-logo {
        margin: 0 0 0.7rem;
        position: absolute;
        left: -4.5rem;
        top: 0;
        width: 3.6rem;
        height: 3.6rem;
        padding: 0.45rem;
    }
    .journey-stop {
        position: relative;
        min-height: 4rem;
    }
}

/* ==========================================================================
   8 · Beyond Research
   ========================================================================== */

.beyond-group {
    margin-bottom: 2.8rem;
}

.beyond-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.4rem 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--rule);
}
.beyond-head h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
}
.beyond-head p {
    margin: 0;
    font-size: 0.92rem;
    color: var(--ink-faint);
    letter-spacing: 0.03em;
}

.beyond-strip {
    display: grid;
    /* fixed track count so a two-item group keeps the same card size as a four-item one */
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

@media (max-width: 991.98px) {
    .beyond-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}
@media (max-width: 479.98px) {
    .beyond-strip {
        grid-template-columns: minmax(0, 1fr);
    }
}

.beyond-card {
    position: relative;
    margin: 0;
    height: 12.5rem;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.beyond-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}
.beyond-card:hover img {
    transform: scale(1.06);
}
.beyond-card figcaption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 0.65rem 0.85rem;
    background: linear-gradient(to top, rgba(20, 16, 12, 0.78), rgba(20, 16, 12, 0));
    color: #fff;
    font-family: var(--sans);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.55);
    pointer-events: none;
}

.watering {
    display: grid;
    grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
    gap: 0 2rem;
    align-items: center;
    margin-top: 3rem;
    padding: 1.5rem;
    border: 1px solid var(--rule);
    border-radius: 14px;
    background: var(--paper-raised);
    box-shadow: var(--shadow-sm);
}
.watering img {
    width: 100%;
    height: 11rem;
    object-fit: cover;
    border-radius: 10px;
}
.watering h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}
.watering p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 1rem;
}

@media (max-width: 767.98px) {
    .watering {
        grid-template-columns: minmax(0, 1fr);
        gap: 1.2rem;
    }
}

/* ==========================================================================
   9 · Contact
   ========================================================================== */

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.contact-card {
    padding: 1.4rem 1.5rem;
    border: 1px solid var(--rule);
    border-radius: 12px;
    background: var(--paper-raised);
}
.contact-card .fact-label {
    display: block;
    margin-bottom: 0.4rem;
}
.contact-card a {
    font-size: 1.02rem;
    word-break: break-word;
}

.site-footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--rule);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--ink-faint);
}
.site-footer img {
    max-width: 16rem;
    height: auto;
    opacity: 0.85;
}

/* ==========================================================================
   Background music widget
   ========================================================================== */

.music-player {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1050;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--ink);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(43, 38, 32, 0.35);
    cursor: pointer;
    font-size: 1.25rem;
    border: 2px solid rgba(255, 255, 255, 0.15);
    transition: transform 0.2s ease, background-color 0.2s ease;
}
.music-player:hover {
    transform: scale(1.08);
    background: var(--cinnabar-deep);
}
.music-player.playing i {
    animation: music-spin 3s linear infinite;
}
@keyframes music-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.music-player .music-hint {
    position: absolute;
    bottom: 62px;
    right: 0;
    background: rgba(43, 38, 32, 0.85);
    color: #fff;
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}
.music-player.show-hint .music-hint {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}