:root {
    --bg: #f6f1ea;
    --bg-strong: #efe2d2;
    --surface: rgba(255, 255, 255, 0.78);
    --surface-strong: #ffffff;
    --ink: #1f2430;
    --muted: #5f6472;
    --line: rgba(31, 36, 48, 0.12);
    --accent: #df6f46;
    --accent-deep: #b14f2d;
    --accent-soft: rgba(223, 111, 70, 0.14);
    --success: #1f8a66;
    --success-soft: rgba(31, 138, 102, 0.14);
    --shadow: 0 18px 40px rgba(38, 34, 28, 0.12);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --font-main: "Avenir Next", "Segoe UI Variable", "Hiragino Sans", "Yu Gothic UI", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    background: var(--bg);
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    font-family: var(--font-main);
    background:
        radial-gradient(circle at top left, rgba(223, 111, 70, 0.22), transparent 30%),
        radial-gradient(circle at 90% 15%, rgba(35, 86, 118, 0.16), transparent 24%),
        linear-gradient(180deg, #f7efe6 0%, #f4f0ea 50%, #f8f4ee 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.4) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.4) 1px, transparent 1px);
    background-size: 26px 26px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 75%);
    pointer-events: none;
}

.page-shell {
    position: relative;
    width: min(1120px, calc(100% - 28px));
    margin: 0 auto;
    padding: 24px 0 48px;
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 24px;
    border-radius: var(--radius-xl);
    background: linear-gradient(140deg, rgba(22, 33, 62, 0.92), rgba(47, 69, 102, 0.88));
    color: #fff6ef;
    box-shadow: var(--shadow);
    animation: rise-in 0.65s ease both;
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto -10% -35% auto;
    width: 240px;
    height: 240px;
    background: radial-gradient(circle, rgba(255, 181, 135, 0.44), transparent 68%);
}

.hero__eyebrow {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero__main {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: flex-start;
    margin-top: 18px;
}

.hero__title {
    margin: 0;
    font-size: clamp(1.9rem, 4vw, 3.2rem);
    line-height: 1.02;
    letter-spacing: -0.04em;
}

.hero__text {
    margin: 12px 0 0;
    max-width: 720px;
    color: rgba(255, 246, 239, 0.82);
    line-height: 1.75;
}

.hero__back {
    display: inline-flex;
    margin-top: 14px;
    color: #fff6ef;
    text-decoration: none;
    opacity: 0.84;
}

.hero__actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.content {
    display: grid;
    gap: 18px;
    margin-top: 22px;
}

.grid {
    display: grid;
    gap: 18px;
}

.grid--two {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card,
.login-card,
.stat-card,
.preview-card,
.share-item,
.history-item {
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    animation: rise-in 0.7s ease both;
}

.card,
.login-card,
.share-item,
.history-item {
    padding: 20px;
}

.card--center {
    text-align: center;
    padding: 34px 20px;
}

.card__header,
.share-item__header,
.history-item__top {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: flex-start;
}

.card__eyebrow {
    margin-bottom: 10px;
    color: var(--accent-deep);
    font-size: 0.76rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.card__title,
.login-card__title {
    margin: 0;
    font-size: 1.25rem;
    line-height: 1.3;
}

.muted,
.login-card__text,
.preview-card__meta,
.history-item__meta,
.history-item__path {
    color: var(--muted);
    line-height: 1.7;
}

.feature-list,
.file-list {
    margin: 14px 0 0;
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.7;
}

.feature-list li,
.file-list li {
    margin-bottom: 6px;
}

.button-row,
.meta-row,
.inline-form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.button,
button.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 18px;
    border: 0;
    border-radius: 999px;
    font: inherit;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.18s ease, opacity 0.18s ease, background 0.18s ease;
}

.button:hover,
button.button:hover {
    transform: translateY(-1px);
}

.button--primary {
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

.button--ghost {
    color: var(--ink);
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(31, 36, 48, 0.1);
}

.button--block {
    width: 100%;
}

.flash {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    margin-top: 18px;
    box-shadow: var(--shadow);
}

.flash--success {
    background: var(--success-soft);
    color: #135540;
}

.flash--error {
    background: rgba(184, 52, 66, 0.12);
    color: #7f2230;
}

.flash--info {
    background: rgba(31, 36, 48, 0.08);
    color: var(--ink);
}

.login-card {
    width: min(520px, 100%);
    margin: 0 auto;
    padding: 28px;
}

.login-card__badge {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent-deep);
    font-weight: 700;
    font-size: 0.82rem;
}

.stack-form,
.stack {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.field {
    display: grid;
    gap: 8px;
}

.field__label {
    font-size: 0.92rem;
    color: var(--muted);
}

.field__control {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid rgba(31, 36, 48, 0.12);
    border-radius: var(--radius-md);
    background: var(--surface-strong);
    color: var(--ink);
    font: inherit;
}

.field__control--textarea {
    min-height: 120px;
    resize: vertical;
}

.field__control:focus {
    outline: 2px solid rgba(223, 111, 70, 0.2);
    border-color: rgba(223, 111, 70, 0.4);
}

.message-box,
.notice-card {
    border: 1px solid rgba(223, 111, 70, 0.16);
    background: rgba(255, 255, 255, 0.72);
}

.message-box {
    margin-top: 18px;
    padding: 16px 18px;
    border-radius: var(--radius-md);
}

.message-box__title {
    margin: 0 0 8px;
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--accent-deep);
}

.message-box__body,
.notice-card__body {
    font-size: 0.96rem;
    line-height: 1.8;
}

.notice-card summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--accent-deep);
    list-style: none;
}

.notice-card summary::-webkit-details-marker {
    display: none;
}

.notice-card[open] .notice-card__body {
    margin-top: 12px;
}

.stats-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.stat-card {
    padding: 18px;
}

.stat-card__value {
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 800;
    line-height: 1.1;
}

.stat-card__label {
    margin-top: 10px;
    color: var(--muted);
}

.status-pill {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    border-radius: 999px;
    background: rgba(31, 36, 48, 0.08);
    color: var(--ink);
    font-size: 0.84rem;
    white-space: nowrap;
}

.status-pill--success {
    background: var(--success-soft);
    color: var(--success);
}

.status-pill--muted {
    background: rgba(31, 36, 48, 0.08);
    color: var(--muted);
}

.details-block {
    border-top: 1px solid var(--line);
    padding-top: 14px;
}

.details-block summary {
    cursor: pointer;
    font-weight: 700;
}

.share-list,
.history-list {
    display: grid;
    gap: 14px;
    margin-top: 16px;
}

.share-item h3,
.file-group h4 {
    margin: 0;
}

.url-box {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    background: rgba(18, 24, 38, 0.05);
    overflow-x: auto;
}

.url-box code {
    color: var(--ink);
    font-size: 0.9rem;
}

.meta-row,
.history-item__meta {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.preview-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.preview-card {
    overflow: hidden;
}

.preview-card__media {
    position: relative;
    aspect-ratio: 4 / 3;
    background: linear-gradient(135deg, rgba(33, 45, 78, 0.08), rgba(223, 111, 70, 0.14));
}

.preview-card__media img,
.preview-card__media video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    background: #000;
}

.preview-card__media audio {
    width: calc(100% - 24px);
    margin: 0 12px 12px;
}

.preview-card__body {
    padding: 16px;
}

.preview-card__title {
    margin: 0 0 8px;
    font-size: 1rem;
    line-height: 1.45;
    word-break: break-word;
}

.file-icon {
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--accent-deep);
}

.history-item__path {
    margin-top: 8px;
    word-break: break-all;
}

.file-group {
    margin-top: 14px;
}

.file-list li {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    word-break: break-all;
}

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 720px) {
    .page-shell {
        width: min(100% - 18px, 100%);
        padding-top: 14px;
    }

    .hero {
        padding: 20px;
    }

    .hero__main,
    .card__header,
    .share-item__header,
    .history-item__top {
        flex-direction: column;
    }

    .hero__actions,
    .button-row,
    .inline-form {
        width: 100%;
    }

    .button,
    button.button {
        width: 100%;
    }

    .preview-grid {
        grid-template-columns: 1fr;
    }
}
.completion-form {
    justify-items: center;
}

.completion-form .status-pill {
    margin: 6px auto 0;
}