:root {
    --ink: #31415f;
    --muted: #7d8aa3;
    --line: rgba(116, 197, 232, .28);
    --paper: rgba(255, 255, 255, .88);
    --bg: #fbfdff;
    --blue: #78d6f4;
    --blue-deep: #67b7f5;
    --orange: #ffb56f;
    --pink: #f6a7d7;
    --violet: #c5b7ff;
    --red: #e06f75;
    --green: #62b783;
    --shadow: 0 16px 42px rgba(105, 153, 194, .13);
    --shadow-strong: 0 24px 62px rgba(105, 153, 194, .2);
    --grad: linear-gradient(120deg, var(--blue), var(--pink) 55%, var(--orange));
    --grad-cool: linear-gradient(120deg, #eaf9ff, #fff7fb 58%, #fff3e7);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 12% 4%, rgba(120, 214, 244, .32), transparent 28%),
        radial-gradient(circle at 90% 0%, rgba(246, 167, 215, .24), transparent 28%),
        linear-gradient(180deg, #ffffff 0%, #fbfdff 42%, #fffaf6 100%);
    font-family: "Zen Maru Gothic", "Zen Maru Gothic Bold", "Yu Gothic", "Hiragino Maru Gothic ProN", system-ui, sans-serif;
    font-weight: 700;
    line-height: 1.65;
}
a { color: inherit; }
.topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 62px;
    padding: 0 18px;
    background: rgba(255,255,255,.78);
    border-bottom: 1px solid rgba(120, 214, 244, .22);
    backdrop-filter: blur(18px);
}
.brand { color: var(--ink); font-size: 19px; font-weight: 900; text-decoration: none; }
.brand::after { content: ""; display: block; width: 100%; height: 4px; margin-top: 1px; border-radius: 999px; background: var(--grad); }
.nav { display: flex; align-items: center; gap: 6px; font-size: 14px; }
.nav a { padding: 8px 12px; border-radius: 999px; color: var(--muted); text-decoration: none; border: 1px solid transparent; transition: .18s ease; }
.nav a:hover { color: var(--ink); border-color: rgba(120, 214, 244, .55); background: rgba(255,255,255,.65); }
.shell { width: min(1120px, 100%); margin: 0 auto; padding: 24px 14px 108px; }
h1, h2, h3 { margin: 0; line-height: 1.22; letter-spacing: 0; font-weight: 900; }
h1 { font-size: clamp(31px, 5vw, 46px); }
h2 { font-size: 21px; }
h3 { font-size: 17px; }
p { margin: 8px 0 0; color: var(--muted); }
small { color: var(--muted); }
.grid { display: grid; gap: 15px; }
.grid.two { grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr); }
.metrics { grid-template-columns: repeat(4, 1fr); }
.top-gap { margin-top: 15px; }
.panel, .metric, .list-item, .user-card, .flash-card, .request-detail-row, .request-item {
    background: var(--paper);
    border: 1px solid rgba(120, 214, 244, .24);
    border-radius: 28px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.panel:hover, .metric:hover, .request-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-strong); }
.panel { padding: 20px; }
.panel h2, .mobile-hero h1, .toolbar h1 { text-decoration: underline; text-decoration-color: rgba(120, 214, 244, .8); text-decoration-thickness: 5px; text-underline-offset: 8px; }
.metric { position: relative; padding: 17px; min-height: 116px; overflow: hidden; }
.metric::after { content: ""; position: absolute; left: 18px; right: 18px; bottom: 12px; height: 4px; border-radius: 999px; background: var(--grad); }
.metric span, label { display: block; color: var(--muted); font-size: 13px; font-weight: 900; }
.metric strong { display: block; margin-top: 8px; color: var(--ink); font-size: clamp(24px, 4vw, 33px); font-weight: 900; }
.toolbar { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; margin-bottom: 16px; }
.toolbar-actions { display: flex; align-items: end; gap: 10px; }
form, .stack { display: grid; gap: 12px; }
.stack { margin-top: 14px; }
input, select, textarea, button, .button { width: 100%; font: inherit; border-radius: 999px; }
input, select, textarea {
    margin-top: 6px;
    padding: 13px 16px;
    color: var(--ink);
    background: rgba(255,255,255,.92);
    border: 1px solid rgba(125, 138, 163, .24);
    outline: none;
    font-weight: 800;
    transition: border-color .18s ease, box-shadow .18s ease, background-color .18s ease;
}
textarea { min-height: 108px; resize: vertical; border-radius: 24px; }
input:focus, select:focus, textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 5px rgba(120,214,244,.18); background: #fff; }
button, .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 10px 19px;
    color: var(--ink);
    background: rgba(255,255,255,.68);
    border: 1.5px solid rgba(120,214,244,.75);
    font-weight: 900;
    text-decoration: none;
    cursor: pointer;
    box-shadow: none;
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease, background .16s ease;
}
button:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(120,214,244,.18); border-color: var(--pink); }
button:active, .button:active { transform: translateY(0) scale(.99); }
.submit-large, .flash-actions > button, .modal-card button[type="submit"] { color: #fff; border-color: transparent; background: var(--grad); box-shadow: 0 14px 30px rgba(246,167,215,.28); }
button.secondary, .button.ghost { color: var(--ink); background: rgba(255,255,255,.72); border-color: rgba(120,214,244,.75); }
button.danger, .ghost-danger { color: var(--red) !important; background: rgba(255,255,255,.72) !important; border-color: rgba(224,111,117,.75) !important; }
.alert { margin-bottom: 14px; padding: 12px 15px; color: #9b5d20; background: rgba(255,255,255,.86); border: 1px solid rgba(255,181,111,.75); border-radius: 22px; }
.alert.success { color: var(--green); border-color: rgba(120,214,244,.8); }
.split-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.month-form { width: 190px; }
.list { display: grid; gap: 10px; margin-top: 14px; }
.list-item { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding: 15px; box-shadow: none; border-left: 5px solid var(--blue); }
.list-item:nth-child(even) { border-left-color: var(--orange); }
.right { text-align: right; }
.badge, .flash-meta span {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 900;
    white-space: nowrap;
    background: rgba(255,255,255,.68);
    color: var(--ink);
    border: 1px solid rgba(120,214,244,.78);
}
.flash-meta span:nth-child(even), .approved, .paid { border-color: rgba(255,181,111,.85); }
.rejected { color: var(--red); border-color: rgba(224,111,117,.75); }
.cancelled { color: var(--muted); border-color: rgba(125,138,163,.25); }
.mobile-hero { margin: 8px 0 20px; animation: riseIn .3s ease both; }
.eyebrow { display: block; margin-bottom: 8px; color: var(--muted); font-size: 11px; font-weight: 900; letter-spacing: .14em; }
.eyebrow::after { content: ""; display: block; width: 60px; height: 4px; margin-top: 5px; border-radius: 999px; background: var(--grad); }
.request-layout { display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(320px, .94fr); gap: 16px; align-items: start; }
.request-card { position: sticky; top: 80px; }
.section-heading { display: flex; align-items: center; gap: 12px; }
.section-heading.compact { margin-bottom: 12px; }
.section-heading p { margin-top: 3px; font-size: 13px; }
.step { display: grid; place-items: center; width: 38px; height: 38px; flex: 0 0 38px; border-radius: 50%; color: #fff; background: var(--grad); font-weight: 900; }
.mode-switch { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 5px; border: 1px solid rgba(120,214,244,.34); border-radius: 999px; background: rgba(255,255,255,.76); }
.mode-switch label { margin: 0; }
.mode-switch input { position: absolute; opacity: 0; pointer-events: none; }
.mode-switch span { display: grid; place-items: center; min-height: 46px; border-radius: 999px; color: var(--muted); font-weight: 900; border: 1px solid transparent; transition: .18s ease; }
.mode-switch input:checked + span { color: #fff; background: var(--grad); border-color: transparent; box-shadow: 0 10px 24px rgba(120,214,244,.2); }
.mode-panel { display: grid; gap: 12px; animation: riseIn .24s ease both; }
.file-drop { display: grid; place-items: center; padding: 20px; text-align: center; border: 1.5px dashed rgba(120,214,244,.85); border-radius: 26px; background: rgba(255,255,255,.72); cursor: pointer; transition: .18s ease; }
.file-drop:hover { border-color: rgba(255,181,111,.95); background: rgba(255,255,255,.92); }
.file-drop input { width: auto; margin: 0 0 8px; }
.receipt-preview { overflow: hidden; border: 1px solid rgba(120,214,244,.25); border-radius: 22px; background: #fff; animation: riseIn .22s ease both; }
.receipt-preview img { display: block; width: 100%; max-height: 420px; object-fit: contain; background: #fff; }
.receipt-preview-drop[hidden], [data-tab-panel][hidden], .modal-backdrop[hidden] { display: none; }
.submit-large { min-height: 58px; font-size: 16px; }
.request-item { padding: 16px; background: rgba(255,255,255,.86); box-shadow: none; }
.request-item h3 { margin: 10px 0 4px; }
.request-item-top, .flash-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.item-actions { display: block; margin-top: 10px; }
.item-actions button { width: auto; min-height: 38px; padding: 7px 15px; }
.empty-state { padding: 32px 18px; text-align: center; color: var(--muted); }
.admin-tabs.bottom-tabs {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: 10px;
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 7px;
    margin: 0;
    padding: 8px;
    background: rgba(255,255,255,.78);
    backdrop-filter: blur(22px);
    border: 1px solid rgba(120,214,244,.28);
    border-radius: 30px;
    box-shadow: 0 18px 48px rgba(105,153,194,.18);
    overflow: visible;
}
.admin-tab { min-width: 0; min-height: 50px; padding: 8px 6px; color: var(--muted); background: transparent; border: 1px solid transparent; box-shadow: none; font-size: 13px; }
.admin-tab.active { color: var(--ink); background: rgba(255,255,255,.82); border-color: rgba(120,214,244,.72); }
.admin-tab.active::after { content: ""; width: 24px; height: 4px; margin-left: 6px; border-radius: 999px; background: var(--grad); }
.chart-box { display: grid; place-items: center; min-height: 360px; padding: 8px 0 12px; overflow: hidden; }
.chart-box canvas { display: block; width: min(100%, 520px) !important; height: auto !important; aspect-ratio: 1 / 1; }
.flash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; perspective: 1000px; }
.flash-card {
    position: relative;
    display: grid;
    gap: 12px;
    min-height: 330px;
    padding: 24px;
    border-radius: 30px;
    border: 1px solid rgba(120,214,244,.28);
    border-top: 6px solid var(--blue);
    box-shadow: 0 18px 48px rgba(105,153,194,.15);
    transform-origin: center bottom;
    animation: cardDeal .38s ease both;
}
.flash-card:nth-child(even) { border-top-color: var(--orange); transform: rotate(.7deg); }
.flash-card:nth-child(odd) { transform: rotate(-.5deg); }
.flash-card:hover { transform: translateY(-7px) rotate(0deg); box-shadow: var(--shadow-strong); }
.flash-card::before { content: ""; position: absolute; inset: 11px; border: 1px dashed rgba(246,167,215,.48); border-radius: 22px; pointer-events: none; }
.flash-card h2 { font-size: clamp(28px, 5vw, 42px); color: var(--ink); }
.flash-card p { color: var(--ink); white-space: pre-wrap; }
.flash-meta, .flash-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.receipt-mini { min-height: 74px; display: grid; align-items: center; }
.receipt-mini img { width: 100%; max-height: 220px; object-fit: contain; border-radius: 22px; background: #fff; border: 1px solid rgba(120,214,244,.25); }
.flash-actions { display: grid; grid-template-columns: repeat(4, 1fr); }
.flash-actions form { display: block; }
.mobile-table-list { display: grid; gap: 10px; margin-top: 14px; }
.request-detail-row { overflow: hidden; box-shadow: none; border-left: 5px solid var(--blue); }
.request-detail-row:nth-child(even) { border-left-color: var(--orange); }
.request-detail-row summary { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; padding: 15px; cursor: pointer; }
.request-detail-row[open] { border-color: rgba(246,167,215,.55); }
.request-detail-row summary strong, .request-detail-row summary small { display: block; }
.detail-body { display: grid; gap: 10px; padding: 0 15px 15px; animation: riseIn .18s ease both; }
.detail-receipt { width: 100%; max-height: 520px; object-fit: contain; border: 1px solid rgba(120,214,244,.25); border-radius: 22px; background: #fff; }
.user-list { display: grid; gap: 12px; margin-top: 14px; }
.user-card { padding: 14px; box-shadow: none; border-left: 5px solid var(--orange); }
.user-form { grid-template-columns: 1.1fr 1.4fr 120px 86px 105px 92px; align-items: end; }
.password-form { grid-template-columns: 1fr 130px; align-items: end; margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--line); }
.checkline { display: flex; align-items: center; gap: 8px; min-height: 48px; }
.checkline input { width: auto; margin: 0; }
.modal-backdrop { position: fixed; inset: 0; z-index: 50; display: grid; place-items: end center; padding: 16px; background: rgba(49,65,95,.28); animation: fadeIn .16s ease both; }
.modal-card { width: min(430px, 100%); padding: 22px; border-radius: 30px; background: rgba(255,255,255,.94); border: 1px solid rgba(120,214,244,.28); box-shadow: 0 30px 90px rgba(105,153,194,.24); animation: sheetIn .2s ease both; }
.auth { width: min(430px, 100%); margin: 40px auto; padding: 24px; background: rgba(255,255,255,.88); border: 1px solid rgba(120,214,244,.28); border-radius: 28px; box-shadow: var(--shadow); }
@keyframes riseIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes sheetIn { from { opacity: 0; transform: translateY(16px) scale(.99); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes cardDeal { from { opacity: 0; transform: translateY(20px) rotate(-2deg) scale(.98); } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }
@media (max-width: 840px) {
    .shell { padding: 16px 12px 112px; }
    .topbar { min-height: 58px; padding-inline: 12px; }
    .brand { max-width: 48%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .nav { gap: 4px; font-size: 13px; }
    .nav a { padding: 8px 9px; }
    .toolbar { flex-direction: column; }
    .toolbar-actions { width: 100%; align-items: stretch; flex-direction: column; }
    .month-form { width: 100%; }
    .grid.two, .metrics, .split-row, .user-form, .password-form { grid-template-columns: 1fr; }
    .metrics.admin-metrics { grid-template-columns: 1fr 1fr; }
    .panel { padding: 16px; }
    .request-layout { grid-template-columns: 1fr; }
    .request-card { position: static; }
    .history-card { order: 2; }
    .mobile-form input, .mobile-form select, .mobile-form textarea { min-height: 50px; font-size: 16px; }
    .flash-grid { grid-template-columns: 1fr; }
    .flash-actions { grid-template-columns: 1fr 1fr; }
    .request-detail-row summary { grid-template-columns: 1fr; }
    .list-item { grid-template-columns: 1fr; }
    .right { text-align: left; }
    .chart-box { min-height: 320px; }
    .chart-box canvas { width: min(100%, 320px) !important; }
    .modal-backdrop { padding: 10px; }
}

.request-submit {
    display: flex !important;
    margin-top: 6px;
    min-height: 60px;
    font-size: 18px;
    letter-spacing: .04em;
}

.upload-choice {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.upload-choice .file-drop {
    min-height: 86px;
    padding: 16px 12px;
}
.upload-choice .file-drop span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
}
@media (max-width: 520px) {
    .upload-choice {
        grid-template-columns: 1fr;
    }
}

/* Request screen responsive polish */
.request-mobile-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
}
.request-card {
    position: static;
    width: min(720px, 100%);
    margin: 0 auto;
}
.history-card {
    width: min(720px, 100%);
    margin: 0 auto;
}
.request-flow {
    gap: 14px;
}
.request-flow .section-heading {
    align-items: flex-start;
}
.request-flow .section-heading h2 {
    word-break: keep-all;
    overflow-wrap: anywhere;
}
.request-flow .split-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}
.upload-choice {
    grid-template-columns: minmax(0, 1fr);
}
.upload-choice .file-drop {
    min-height: 76px;
    width: 100%;
}
.mobile-hero {
    width: min(720px, 100%);
    margin-left: auto;
    margin-right: auto;
}
.request-submit {
    width: 100%;
}

@media (min-width: 1080px) {
    .request-mobile-layout {
        grid-template-columns: minmax(0, 720px) minmax(300px, 360px);
        justify-content: center;
        align-items: start;
    }
    .request-card,
    .history-card {
        width: 100%;
        margin: 0;
    }
    .request-card {
        position: sticky;
        top: 80px;
    }
}

@media (max-width: 680px) {
    .mobile-hero h1 {
        font-size: clamp(28px, 10vw, 38px);
    }
    .mobile-hero p {
        font-size: 14px;
    }
    .request-flow .split-row {
        grid-template-columns: 1fr;
    }
    .mode-switch {
        grid-template-columns: 1fr;
        border-radius: 28px;
    }
    .mode-switch span {
        min-height: 44px;
    }
    .section-heading {
        gap: 10px;
    }
    .step {
        width: 34px;
        height: 34px;
        flex-basis: 34px;
    }
    .file-drop {
        padding: 16px 12px;
    }
    .request-item-top {
        align-items: flex-start;
        flex-direction: column;
    }
}