/*
========================================

KMC SAMULNORI
Arrangements Page
Version 1.0

========================================
*/


/* ======================================
   PAGE FOUNDATION
====================================== */

.arrangements-page {
    min-height: 100vh;
    overflow-x: hidden;
}

.arrangements-page main {
    position: relative;
    z-index: 1;
}

.arrangements-page .arrangements-hero {
    padding-top: 190px;
    padding-bottom: 44px;
}

.arrangements-page-header {
    max-width: 900px;
}

.arrangements-page-header h1 {
    margin: 0;
    font-size: clamp(3.5rem, 9vw, 7.5rem);
    font-weight: 800;
    line-height: 0.94;
    letter-spacing: -0.075em;
}


/* ======================================
   ARRANGEMENT LIST
====================================== */

.arrangements-list-section {
    padding: 24px 24px 140px;
}

.arrangements-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(22px, 2.6vw, 34px);
}

.arrangements-page .arrangement-page-card {
    appearance: none;
    -webkit-appearance: none;
    display: block;
    width: 100%;
    min-height: clamp(390px, 44vw, 560px);
    padding: 0;
    overflow: hidden;
    color: #ffffff;
    font: inherit;
    text-align: left;
    cursor: pointer;
    isolation: isolate;
    border: 1px solid var(--glass-border);
    border-radius: clamp(24px, 3vw, 36px);
    background: var(--surface);
    box-shadow: var(--shadow);
    transform: translateZ(0);
    transition:
        transform 700ms var(--transition),
        box-shadow 700ms var(--transition),
        border-color 350ms ease;
}

.arrangements-page .arrangement-page-card::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background:
        linear-gradient(
            to top,
            rgba(0, 0, 0, 0.82) 0%,
            rgba(0, 0, 0, 0.36) 40%,
            rgba(0, 0, 0, 0.04) 72%,
            rgba(0, 0, 0, 0.08) 100%
        );
}

.arrangements-page .arrangement-page-card::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    border-radius: inherit;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.18),
        transparent 34%,
        transparent 70%,
        rgba(255, 255, 255, 0.07)
    );
    opacity: 0.65;
    transition: opacity 450ms ease;
}

.arrangements-page .arrangement-page-card > img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.001);
    transition:
        transform 1.15s var(--transition),
        filter 700ms ease;
}

.arrangements-page .arrangement-page-card .card-content {
    position: absolute;
    right: 96px;
    bottom: 36px;
    left: 38px;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    color: #ffffff;
    pointer-events: none;
    transform: translateY(0);
    transition: transform 600ms var(--transition);
}

.arrangement-title {
    display: block;
    font-size: clamp(2.6rem, 6vw, 5.3rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.065em;
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.arrangement-korean {
    display: block;
    margin-top: 10px;
    font-size: clamp(1.05rem, 2.2vw, 1.55rem);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.025em;
    opacity: 0.9;
}

.arrangement-card-arrow {
    position: absolute;
    right: 30px;
    bottom: 30px;
    z-index: 4;
    display: grid;
    width: 52px;
    height: 52px;
    place-items: center;
    color: #ffffff;
    pointer-events: none;
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.13);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    opacity: 1;
    transform: none;
    transition:
        opacity 420ms ease,
        transform 600ms var(--transition),
        background-color 300ms ease;
}

.arrangement-card-arrow svg,
.arrangement-detail-arrow svg {
    width: 24px;
    height: 24px;
    overflow: visible;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

@media (hover: hover) and (pointer: fine) {
    .arrangements-page .arrangement-page-card:hover {
        transform: translateY(-10px) scale(1.006);
        box-shadow: 0 40px 100px rgba(0, 0, 0, 0.22);
    }

    .arrangements-page .arrangement-page-card:hover > img {
        transform: scale(1.045);
    }

    .arrangements-page .arrangement-page-card:hover::after {
        opacity: 1;
    }

}

.arrangements-page .arrangement-page-card:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 5px;
}

.arrangements-page .arrangement-page-card:active {
    transform: scale(0.992);
}


/* ======================================
   EXPANSION BACKDROP
====================================== */

.arrangement-backdrop {
    position: fixed;
    inset: 0;
    z-index: 19990;
    visibility: hidden;
    background: rgba(0, 0, 0, 0.26);
    -webkit-backdrop-filter: blur(0);
    backdrop-filter: blur(0);
    opacity: 0;
    pointer-events: none;
    transition:
        opacity 500ms ease,
        visibility 0s linear 500ms,
        backdrop-filter 650ms ease,
        -webkit-backdrop-filter 650ms ease;
}

.arrangement-backdrop.is-active,
.arrangement-backdrop[aria-hidden="false"] {
    visibility: visible;
    -webkit-backdrop-filter: blur(28px) saturate(120%);
    backdrop-filter: blur(28px) saturate(120%);
    opacity: 1;
    pointer-events: auto;
    transition-delay: 0s;
}

body.arrangement-open {
    overflow: hidden;
}

body.arrangement-open .navbar {
    pointer-events: none;
}


/* ======================================
   EXPANDED ARRANGEMENT PANEL
====================================== */

.arrangement-detail {
    position: fixed;
    inset: 0;
    z-index: 20000;
    display: grid;
    padding: clamp(12px, 2vw, 28px);
    place-items: center;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transform: translateY(32px) scale(0.965);
    transition:
        opacity 420ms ease,
        transform 700ms var(--transition),
        visibility 0s linear 700ms;
}

.arrangement-detail.is-open,
.arrangement-detail[aria-hidden="false"] {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
    transition-delay: 0s;
}

.arrangement-detail-shell {
    position: relative;
    width: min(96vw, 1320px);
    height: min(94vh, 980px);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.34);
    border-radius: clamp(26px, 3vw, 42px);
    background: color-mix(in srgb, var(--background) 91%, transparent);
    box-shadow:
        0 60px 160px rgba(0, 0, 0, 0.34),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    -webkit-backdrop-filter: blur(35px) saturate(120%);
    backdrop-filter: blur(35px) saturate(120%);
}

.arrangement-detail-scroll {
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: rgba(127, 127, 127, 0.45) transparent;
}

.arrangement-detail-scroll::-webkit-scrollbar {
    width: 10px;
}

.arrangement-detail-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.arrangement-detail-scroll::-webkit-scrollbar-thumb {
    border: 3px solid transparent;
    border-radius: 999px;
    background: rgba(127, 127, 127, 0.4);
    background-clip: padding-box;
}

.arrangement-close {
    position: absolute;
    top: 22px;
    right: 22px;
    z-index: 20;
    display: block;
    width: 48px;
    height: 48px;
    padding: 0;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 50%;
    background: rgba(20, 20, 22, 0.42);
    -webkit-backdrop-filter: blur(22px);
    backdrop-filter: blur(22px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
    transition:
        transform 350ms var(--transition),
        background-color 300ms ease;
}

.arrangement-close span {
    position: absolute;
    top: 50%;
    left: 50%;
    display: block;
    width: 19px;
    height: 2px;
    border-radius: 999px;
    background: #ffffff;
}

.arrangement-close span:first-child {
    transform: translate(-50%, -50%) rotate(45deg);
}

.arrangement-close span:last-child {
    transform: translate(-50%, -50%) rotate(-45deg);
}

.arrangement-close:hover {
    background: rgba(20, 20, 22, 0.62);
    transform: rotate(90deg) scale(1.04);
}

.arrangement-close:focus-visible {
    outline: 3px solid #ffffff;
    outline-offset: 3px;
}


/* ======================================
   DETAIL HERO
====================================== */

.arrangement-detail-hero {
    position: relative;
    min-height: clamp(400px, 62vh, 650px);
    overflow: hidden;
    isolation: isolate;
    background: #111111;
}

.arrangement-detail-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.84) 0%,
        rgba(0, 0, 0, 0.24) 48%,
        rgba(0, 0, 0, 0.06) 76%,
        rgba(0, 0, 0, 0.15) 100%
    );
}

.arrangement-detail-hero > img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.06);
    transition: transform 1.1s var(--transition);
}

.arrangement-detail.is-open .arrangement-detail-hero > img,
.arrangement-detail[aria-hidden="false"] .arrangement-detail-hero > img {
    transform: scale(1);
}

.arrangement-detail-overlay {
    position: absolute;
    right: clamp(28px, 5vw, 72px);
    bottom: clamp(42px, 7vw, 82px);
    left: clamp(28px, 5vw, 72px);
    z-index: 3;
    color: #ffffff;
}

.arrangement-detail-overlay h2 {
    margin: 0;
    font-size: clamp(3.5rem, 9vw, 7rem);
    font-weight: 800;
    line-height: 0.92;
    letter-spacing: -0.075em;
    text-shadow: 0 6px 32px rgba(0, 0, 0, 0.3);
}

.arrangement-detail-overlay p {
    margin: 12px 0 0;
    font-size: clamp(1.2rem, 2.8vw, 1.8rem);
    font-weight: 500;
    letter-spacing: -0.025em;
    opacity: 0.9;
}

.arrangement-detail-arrow {
    position: absolute;
    bottom: 22px;
    left: 50%;
    z-index: 4;
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    opacity: 0;
    transform: translate(-50%, -22px) rotate(180deg);
    transition:
        opacity 450ms ease 180ms,
        transform 750ms var(--transition) 120ms;
}

.arrangement-detail.is-open .arrangement-detail-arrow,
.arrangement-detail[aria-hidden="false"] .arrangement-detail-arrow {
    opacity: 1;
    transform: translate(-50%, 0) rotate(0deg);
}


/* ======================================
   INSTRUMENT CONTENT
====================================== */

.arrangement-detail-content {
    padding: clamp(54px, 8vw, 104px) clamp(24px, 6vw, 88px) clamp(70px, 9vw, 120px);
}

.arrangement-detail-content > h3 {
    margin: 0 0 clamp(36px, 6vw, 70px);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 0.98;
    letter-spacing: -0.065em;
}

.instrument-list {
    display: grid;
    gap: clamp(32px, 5vw, 64px);
}

.instrument-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(30px, 6vw, 88px);
    padding-bottom: clamp(32px, 5vw, 64px);
    border-bottom: 1px solid color-mix(in srgb, var(--text) 14%, transparent);
}

.instrument-row:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.instrument-image {
    position: relative;
    min-height: clamp(260px, 34vw, 440px);
    overflow: hidden;
    border: 1px solid var(--glass-border);
    border-radius: clamp(22px, 3vw, 34px);
    background: var(--surface);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.12);
}

.instrument-image img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 800ms var(--transition);
}

.instrument-row:hover .instrument-image img {
    transform: scale(1.035);
}

.instrument-copy h4 {
    margin: 0;
    font-size: clamp(2rem, 4.5vw, 4rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.055em;
}

.instrument-copy h4 span {
    display: inline;
    margin-left: 0.2em;
    font-size: 0.72em;
    font-weight: 600;
    letter-spacing: -0.035em;
    color: var(--secondary-text);
}

/* ======================================
   TABLET
====================================== */

@media (max-width: 900px) {
    .arrangements-page .arrangements-hero {
        padding-top: 165px;
        padding-bottom: 34px;
    }

    .arrangements-list-section {
        padding-bottom: 100px;
    }

    .arrangements-page .arrangement-page-card {
        min-height: clamp(390px, 70vw, 530px);
    }

    .arrangement-detail-shell {
        width: calc(100vw - 24px);
        height: calc(100vh - 24px);
        height: calc(100dvh - 24px);
    }

    .instrument-row {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .instrument-image {
        min-height: min(62vw, 430px);
    }
}


/* ======================================
   MOBILE
====================================== */

@media (max-width: 600px) {
    .arrangements-page .arrangements-hero {
        padding: 145px 18px 26px;
    }

    .arrangements-page-header h1 {
        font-size: clamp(3rem, 16vw, 4.6rem);
    }

    .arrangements-list-section {
        padding: 18px 18px 80px;
    }

    .arrangements-list {
        grid-template-columns: 1fr;
        gap: 22px;
    }

    .arrangements-page .arrangement-page-card {
        min-height: 410px;
        border-radius: 24px;
    }

    .arrangements-page .arrangement-page-card .card-content {
        right: 24px;
        bottom: 28px;
        left: 24px;
    }

    .arrangement-title {
        font-size: clamp(2.55rem, 14vw, 4rem);
    }

    .arrangement-card-arrow {
        right: 20px;
        bottom: 22px;
        left: auto;
        width: 46px;
        height: 46px;
        opacity: 1;
        transform: translateY(0) scale(1);
    }

    .arrangement-page-card .card-content {
        padding-right: 56px;
    }

    .arrangement-detail {
        padding: 6px;
    }

    .arrangement-detail-shell {
        width: calc(100vw - 12px);
        height: calc(100vh - 12px);
        height: calc(100dvh - 12px);
        border-radius: 25px;
    }

    .arrangement-close {
        top: 14px;
        right: 14px;
        width: 44px;
        height: 44px;
    }

    .arrangement-detail-hero {
        min-height: min(68vh, 560px);
        min-height: min(68dvh, 560px);
    }

    .arrangement-detail-overlay {
        right: 24px;
        bottom: 68px;
        left: 24px;
    }

    .arrangement-detail-overlay h2 {
        font-size: clamp(3.2rem, 17vw, 5rem);
    }

    .arrangement-detail-content {
        padding: 48px 20px 72px;
    }

    .arrangement-detail-content > h3 {
        margin-bottom: 38px;
        font-size: clamp(2.5rem, 12vw, 3.5rem);
    }

    .instrument-list {
        gap: 38px;
    }

    .instrument-row {
        padding-bottom: 38px;
    }

    .instrument-image {
        min-height: 72vw;
        border-radius: 22px;
    }

    .instrument-copy h4 {
        font-size: clamp(2rem, 10vw, 3rem);
    }

    .instrument-copy h4 span {
        display: block;
        margin: 8px 0 0;
        font-size: 0.62em;
    }

}


/* ======================================
   DARK MODE REFINEMENTS
====================================== */

@media (prefers-color-scheme: dark) {
    .arrangement-detail-shell {
        border-color: rgba(255, 255, 255, 0.14);
        background: rgba(18, 18, 20, 0.9);
        box-shadow:
            0 60px 160px rgba(0, 0, 0, 0.62),
            inset 0 1px 0 rgba(255, 255, 255, 0.07);
    }

    .arrangement-backdrop.is-active,
    .arrangement-backdrop[aria-hidden="false"] {
        background: rgba(0, 0, 0, 0.48);
    }
}


/* ======================================
   REDUCED MOTION
====================================== */

@media (prefers-reduced-motion: reduce) {
    .arrangements-page .arrangement-page-card,
    .arrangements-page .arrangement-page-card > img,
    .arrangements-page .arrangement-page-card .card-content,
    .arrangement-card-arrow,
    .arrangement-backdrop,
    .arrangement-detail,
    .arrangement-detail-hero > img,
    .arrangement-detail-arrow,
    .arrangement-close,
    .instrument-image img {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

/* Match the compact proportions and type scale of public performance cards. */
.arrangements-page .arrangement-page-card {
    min-height: 360px;
}

.arrangements-page .arrangement-page-card .card-content {
    right: 104px;
    bottom: 34px;
    left: 34px;
}

.arrangement-title {
    font-size: clamp(1.75rem, 3.2vw, 2.65rem);
    font-weight: 750;
    line-height: 1.05;
    letter-spacing: -0.035em;
}

.arrangement-korean {
    margin-top: 10px;
    font-size: clamp(0.86rem, 1.25vw, 1rem);
    font-weight: 600;
    line-height: 1.55;
}

@media (max-width: 900px) {
    .arrangements-page .arrangement-page-card { min-height: 360px; }
}

@media (max-width: 600px) {
    .arrangements-page .arrangement-page-card { min-height: 360px; }

    .arrangements-page .arrangement-page-card .card-content {
        right: 82px;
        bottom: 28px;
        left: 28px;
        padding-right: 0;
    }

    .arrangement-card-arrow {
        right: 20px;
        bottom: 20px;
    }
}

/* Match the public performance grid dimensions. */
.arrangements-page .arrangements-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px; }
.arrangements-page .arrangement-page-card { min-height: 360px; height: 360px; border-radius: var(--radius); }
@media (max-width: 900px) {
    .arrangements-page .arrangements-list { grid-template-columns: 1fr; gap: 25px; }
}