:root {
    --paper: #f4ead5;
    --paper-strong: #ead8b8;
    --paper-deep: #d9c19b;
    --ink: #17120d;
    --ink-soft: #645743;
    --seal: #90281c;
    --bronze: #82623c;
    --line: rgba(92, 63, 30, 0.18);
    --shadow: 0 28px 70px rgba(53, 36, 17, 0.16);
    --radius-xl: 34px;
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-sm: 12px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    font-family: "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
    background:
        radial-gradient(circle at 10% 0, rgba(255, 255, 255, 0.68), transparent 26%),
        radial-gradient(circle at 100% 20%, rgba(210, 162, 110, 0.18), transparent 24%),
        linear-gradient(180deg, #f9f3e8 0%, #eedfc4 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.08;
    background:
        repeating-linear-gradient(
            0deg,
            rgba(88, 63, 31, 0.16) 0,
            rgba(88, 63, 31, 0.16) 1px,
            transparent 1px,
            transparent 20px
        );
}

a {
    color: inherit;
}

img {
    display: block;
    max-width: 100%;
}

button {
    font: inherit;
}

.page-shell {
    width: min(1160px, calc(100vw - 28px));
    margin: 24px auto 52px;
}

.hero-block,
.chant-sheet,
.stanza-card,
.modal-panel {
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(92, 63, 30, 0.14);
    background:
        linear-gradient(180deg, rgba(255, 250, 242, 0.98), rgba(248, 236, 212, 0.98)),
        var(--paper);
    box-shadow: var(--shadow);
}

.hero-block::after,
.chant-sheet::after,
.stanza-card::after,
.modal-panel::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.14), transparent 26%),
        radial-gradient(circle at 100% 0, rgba(144, 40, 28, 0.06), transparent 24%);
}

.hero-block {
    border-radius: var(--radius-xl);
    padding: 34px 32px 30px;
    text-align: center;
}

.hero-block h1 {
    margin: 0;
    font-family: "Kaiti SC", "STKaiti", serif;
    font-size: clamp(3.4rem, 7vw, 5.4rem);
    line-height: 1;
    letter-spacing: 0.12em;
}

.chant-sheet {
    margin-top: 0;
    padding: 34px 28px 36px;
    border-radius: var(--radius-xl);
}

.chant-root {
    display: grid;
    gap: 24px;
    position: relative;
    z-index: 1;
}

.title-panel {
    width: min(720px, 100%);
    margin: 0 auto;
    padding: 22px 24px;
    border-radius: 28px;
    background:
        radial-gradient(circle at top, rgba(144, 40, 28, 0.06), transparent 58%),
        rgba(255, 251, 244, 0.78);
    border: 1px solid rgba(92, 63, 30, 0.12);
}

.title-line {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
}

.title-char {
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
    font-family: "Kaiti SC", "STKaiti", serif;
    font-size: clamp(3.2rem, 7vw, 5rem);
    line-height: 1;
    color: var(--ink);
    transition: transform 0.18s ease, color 0.18s ease;
}

.title-char:hover,
.spell-char:hover {
    transform: translateY(-2px);
    color: var(--seal);
}

.stanza-card {
    width: 100%;
    margin: 0;
    border-radius: var(--radius-lg);
    padding: 22px;
}

.line-stack {
    display: grid;
    gap: 14px;
    position: relative;
    z-index: 1;
}

.chant-line {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
    padding: 16px 18px;
    border-radius: 20px;
    background: rgba(255, 252, 246, 0.72);
    border: 1px solid rgba(92, 63, 30, 0.08);
}

.line-phrase {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-wrap: nowrap;
}

.spell-char {
    min-width: 68px;
    min-height: 68px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 20px;
    background: rgba(130, 98, 60, 0.06);
    cursor: pointer;
    color: var(--ink);
    font-family: "Kaiti SC", "STKaiti", serif;
    font-size: clamp(2.35rem, 4.5vw, 3.2rem);
    line-height: 1;
    transition:
        transform 0.18s ease,
        background 0.18s ease,
        color 0.18s ease,
        box-shadow 0.18s ease;
}

.spell-char:hover {
    background: rgba(144, 40, 28, 0.08);
    box-shadow: inset 0 0 0 1px rgba(144, 40, 28, 0.12);
}

.line-punctuation {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: "Kaiti SC", "STKaiti", serif;
    font-size: clamp(2rem, 3vw, 2.6rem);
    line-height: 1;
    color: var(--ink-soft);
}

.chant-line-nowrap {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    gap: 14px;
    padding-inline: 14px;
    justify-content: flex-start;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.chant-line-nowrap::-webkit-scrollbar {
    height: 6px;
}

.chant-line-nowrap::-webkit-scrollbar-thumb {
    background: rgba(130, 98, 60, 0.38);
    border-radius: 999px;
}

.chant-line-nowrap::-webkit-scrollbar-track {
    background: rgba(130, 98, 60, 0.08);
    border-radius: 999px;
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(19, 12, 8, 0.56);
    backdrop-filter: blur(5px);
    z-index: 1000;
}

.modal-panel {
    width: min(980px, calc(100vw - 24px));
    max-height: calc(100vh - 30px);
    overflow: auto;
    border-radius: 30px;
    padding: 24px;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 2;
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 50%;
    background: rgba(92, 63, 30, 0.08);
    color: var(--ink);
    cursor: pointer;
    font-size: 1.3rem;
}

.modal-head,
.modal-section {
    position: relative;
    z-index: 1;
}

.modal-head {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 20px;
    align-items: start;
}

.modal-glyph {
    width: 96px;
    height: 96px;
    display: grid;
    place-items: center;
    border-radius: 28px;
    background:
        linear-gradient(135deg, rgba(144, 40, 28, 0.1), rgba(130, 98, 60, 0.08)),
        rgba(255, 252, 246, 0.8);
    border: 1px solid rgba(92, 63, 30, 0.14);
    font-family: "Kaiti SC", "STKaiti", serif;
    font-size: 3.6rem;
    line-height: 1;
}

.modal-reading {
    margin: 2px 0 0;
    color: var(--ink-soft);
    font-size: 1rem;
}

.modal-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.link-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.7rem 0.95rem;
    border-radius: 999px;
    border: 1px solid rgba(92, 63, 30, 0.14);
    background: rgba(255, 252, 246, 0.84);
    text-decoration: none;
}

.modal-note {
    margin: 14px 0 0;
    padding: 12px 14px;
    border-left: 3px solid rgba(144, 40, 28, 0.4);
    border-radius: 14px;
    background: rgba(130, 98, 60, 0.06);
    color: var(--ink-soft);
    line-height: 1.75;
}

.modal-grid {
    display: grid;
    gap: 16px;
    margin-top: 22px;
}

.modal-section {
    padding: 18px;
    border-radius: 20px;
    background: rgba(255, 250, 242, 0.78);
    border: 1px solid rgba(92, 63, 30, 0.1);
}

.modal-section h3 {
    margin: 0 0 12px;
    font-size: 1.05rem;
}

.gloss-list {
    display: grid;
    gap: 10px;
}

.gloss-groups {
    display: grid;
    gap: 14px;
}

.gloss-group {
    display: grid;
    gap: 10px;
}

.gloss-group-title {
    margin: 0;
    color: var(--bronze);
    font-size: 0.95rem;
    letter-spacing: 0.04em;
}

.gloss-item {
    margin: 0;
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(130, 98, 60, 0.06);
    line-height: 1.8;
    color: var(--ink-soft);
}

.forms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
}

.form-card {
    padding: 12px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(92, 63, 30, 0.08);
}

.form-card h4 {
    margin: 0 0 10px;
    color: var(--bronze);
    font-size: 0.96rem;
}

.form-image {
    aspect-ratio: 1 / 1;
    object-fit: contain;
    padding: 8px;
    border-radius: 12px;
    border: 1px solid rgba(92, 63, 30, 0.08);
    background: rgba(255, 255, 255, 0.72);
}

.page-preview {
    display: grid;
    gap: 12px;
}

.page-preview img {
    border-radius: 18px;
    border: 1px solid rgba(92, 63, 30, 0.12);
    box-shadow: 0 14px 30px rgba(53, 36, 17, 0.12);
}

.image-viewer-backdrop {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(10, 8, 6, 0.72);
    z-index: 1200;
}

.image-viewer-panel {
    width: min(1200px, calc(100vw - 24px));
    max-height: calc(100vh - 24px);
    padding: 14px;
    border-radius: 24px;
    background: rgba(255, 250, 242, 0.96);
    border: 1px solid rgba(92, 63, 30, 0.14);
    box-shadow: var(--shadow);
}

.image-viewer-panel img {
    width: 100%;
    max-height: calc(100vh - 56px);
    object-fit: contain;
    border-radius: 16px;
}

.hidden {
    display: none !important;
}

@media (max-width: 760px) {
    .page-shell {
        width: min(100vw - 14px, 100%);
        margin: 10px auto 28px;
    }

    .chant-sheet,
    .modal-panel {
        padding: 18px 16px;
    }

    .title-line {
        gap: 10px;
    }

    .title-char {
        font-size: 3rem;
    }

    .chant-line {
        gap: 10px;
        padding: 12px 10px;
    }

    .line-phrase {
        gap: 8px;
    }

    .spell-char {
        min-width: 50px;
        min-height: 50px;
        font-size: 1.95rem;
        border-radius: 16px;
    }

    .line-punctuation {
        font-size: 1.8rem;
    }

    .chant-line-nowrap {
        gap: 10px;
        padding-inline: 8px;
    }

    .modal-head {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .modal-links {
        justify-content: flex-start;
    }

    .forms-grid {
        grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
        gap: 12px;
    }
}

@media (max-width: 520px) {
    .page-shell {
        width: calc(100vw - 10px);
        margin: 8px auto 20px;
    }

    .chant-sheet {
        padding: 14px 10px 18px;
        border-radius: 24px;
    }

    .chant-root {
        gap: 14px;
    }

    .title-panel {
        padding: 16px 10px;
        border-radius: 20px;
    }

    .title-line {
        gap: 8px;
    }

    .title-char {
        font-size: 2.65rem;
    }

    .stanza-card {
        padding: 12px;
        border-radius: 18px;
    }

    .line-stack {
        gap: 10px;
    }

    .chant-line {
        gap: 8px;
        padding: 10px 8px;
        border-radius: 16px;
    }

    .line-phrase {
        gap: 6px;
    }

    .spell-char {
        min-width: 42px;
        min-height: 42px;
        font-size: 1.7rem;
        border-radius: 14px;
    }

    .line-punctuation {
        font-size: 1.5rem;
    }

    .chant-line-nowrap {
        gap: 8px;
        padding-inline: 6px;
    }

    .modal-backdrop {
        padding: 10px;
    }

    .modal-panel {
        width: calc(100vw - 12px);
        max-height: calc(100vh - 12px);
        padding: 14px 12px 16px;
        border-radius: 20px;
    }

    .modal-close {
        top: 10px;
        right: 10px;
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }

    .modal-glyph {
        width: 72px;
        height: 72px;
        border-radius: 22px;
        font-size: 2.8rem;
    }

    .modal-reading {
        font-size: 0.95rem;
    }

    .modal-note {
        margin-top: 10px;
        padding: 10px 12px;
        line-height: 1.65;
    }

    .modal-grid {
        gap: 12px;
        margin-top: 16px;
    }

    .modal-section {
        padding: 14px;
        border-radius: 16px;
    }

    .modal-section h3 {
        margin-bottom: 10px;
        font-size: 1rem;
    }

    .gloss-item {
        padding: 10px 12px;
        line-height: 1.7;
    }

    .gloss-groups {
        gap: 12px;
    }

    .gloss-group {
        gap: 8px;
    }

    .gloss-group-title {
        font-size: 0.9rem;
    }

    .link-pill {
        padding: 0.6rem 0.8rem;
        font-size: 0.92rem;
    }

    .forms-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .form-card {
        padding: 10px;
        border-radius: 14px;
    }

    .form-card h4 {
        margin-bottom: 8px;
        font-size: 0.88rem;
    }

    .form-image {
        padding: 6px;
        border-radius: 10px;
    }

    .image-viewer-backdrop {
        padding: 8px;
    }

    .image-viewer-panel {
        width: calc(100vw - 16px);
        max-height: calc(100vh - 16px);
        padding: 8px;
        border-radius: 18px;
    }

    .image-viewer-panel img {
        max-height: calc(100vh - 32px);
        border-radius: 12px;
    }
}