:root {
    --tool-red: #da2a27;
    --tool-red-deep: #8a1d1e;
    --tool-ink: #132136;
    --tool-copy: #435066;
    --tool-border: rgba(19, 33, 54, 0.12);
    --tool-panel: rgba(255, 255, 255, 0.84);
    --tool-shadow: 0 28px 80px rgba(17, 24, 39, 0.16);
    --tool-radius: 28px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body.tool-shell-page {
    margin: 0;
    min-height: 100vh;
    padding: 96px 20px 40px;
    color: var(--tool-ink);
    font-family: "Segoe UI", Arial, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(218, 42, 39, 0.18), transparent 34%),
        radial-gradient(circle at top right, rgba(103, 199, 193, 0.18), transparent 28%),
        linear-gradient(180deg, #f8fafc 0%, #edf2f7 100%);
}

.tool-shell-topbar {
    position: fixed;
    top: 16px;
    left: 20px;
    right: 20px;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 18px;
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.76);
    box-shadow: 0 18px 44px rgba(17, 24, 39, 0.08);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.tool-shell-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.tool-shell-brand__mark {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--tool-red), #f25f5c);
    color: #fff;
    font-weight: 800;
    letter-spacing: 0.06em;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.34), 0 12px 22px rgba(218, 42, 39, 0.22);
}

.tool-shell-brand__copy strong,
.tool-shell-brand__copy span {
    display: block;
}

.tool-shell-brand__copy strong {
    font-size: 15px;
    line-height: 1.2;
}

.tool-shell-brand__copy span {
    color: var(--tool-copy);
    font-size: 12px;
}

.tool-shell-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.tool-shell-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid var(--tool-border);
    background: rgba(255, 255, 255, 0.7);
    color: var(--tool-ink);
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.tool-shell-btn:hover {
    transform: translateY(-2px);
    border-color: rgba(218, 42, 39, 0.28);
    box-shadow: 0 12px 24px rgba(17, 24, 39, 0.08);
    color: var(--tool-red);
}

.tool-shell-btn--primary {
    color: #fff;
    border-color: rgba(218, 42, 39, 0.35);
    background: linear-gradient(135deg, var(--tool-red), #f25f5c);
    box-shadow: 0 16px 28px rgba(218, 42, 39, 0.22);
}

.tool-shell-btn--primary:hover {
    color: #fff;
}

.tool-shell-main {
    max-width: 1200px;
    margin: 0 auto;
}

.tool-shell-hero {
    margin-bottom: 22px;
    padding: 28px 30px;
    border-radius: var(--tool-radius);
    border: 1px solid rgba(255, 255, 255, 0.55);
    background:
        radial-gradient(circle at right top, rgba(218, 42, 39, 0.18), transparent 28%),
        rgba(255, 255, 255, 0.76);
    box-shadow: 0 18px 52px rgba(17, 24, 39, 0.08);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.tool-shell-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    color: var(--tool-red);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.tool-shell-kicker::before {
    content: "";
    width: 34px;
    height: 1px;
    background: rgba(218, 42, 39, 0.4);
}

.tool-shell-hero h1 {
    margin: 0 0 10px;
    font-size: clamp(28px, 4vw, 46px);
    line-height: 1.05;
}

.tool-shell-hero p {
    margin: 0;
    max-width: 760px;
    color: var(--tool-copy);
    font-size: 16px;
    line-height: 1.7;
}

.tool-shell-frame {
    padding: 28px;
    border-radius: var(--tool-radius);
    border: 1px solid rgba(255, 255, 255, 0.58);
    background: var(--tool-panel);
    box-shadow: var(--tool-shadow);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.tool-shell-frame--wide {
    padding: 26px;
}

.tool-shell-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.tool-shell-card {
    border-radius: 22px;
    border: 1px solid var(--tool-border);
    background: rgba(255, 255, 255, 0.72);
    padding: 24px;
    box-shadow: 0 18px 34px rgba(17, 24, 39, 0.06);
}

.tool-shell-card h2,
.tool-shell-card h3 {
    margin-top: 0;
}

.tool-shell-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 700;
    color: var(--tool-ink);
}

.tool-shell-form input[type="text"],
.tool-shell-form input[type="url"],
.tool-shell-form input[type="number"],
.tool-shell-form input[type="search"],
.tool-shell-form textarea,
.tool-shell-form select {
    width: 100%;
    min-height: 52px;
    padding: 14px 16px;
    border: 1px solid rgba(19, 33, 54, 0.12);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.88);
    color: var(--tool-ink);
    outline: none;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.tool-shell-form textarea {
    min-height: 138px;
    resize: vertical;
}

.tool-shell-form input:focus,
.tool-shell-form textarea:focus,
.tool-shell-form select:focus {
    border-color: rgba(218, 42, 39, 0.42);
    box-shadow: 0 0 0 4px rgba(218, 42, 39, 0.08);
}

.tool-shell-stack > * + * {
    margin-top: 16px;
}

.tool-shell-inline {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.tool-shell-note {
    margin-top: 18px;
    padding: 16px 18px;
    border-radius: 18px;
    background: rgba(218, 42, 39, 0.06);
    color: var(--tool-copy);
}

.tool-shell-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    border-radius: 22px;
    border: 1px dashed rgba(19, 33, 54, 0.16);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(246, 248, 251, 0.96)),
        repeating-linear-gradient(45deg, rgba(19, 33, 54, 0.02) 0, rgba(19, 33, 54, 0.02) 12px, transparent 12px, transparent 24px);
    padding: 26px;
}

.tool-shell-preview img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 18px 38px rgba(17, 24, 39, 0.12);
}

.tool-shell-value-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.tool-shell-value {
    padding: 16px;
    border-radius: 18px;
    border: 1px solid var(--tool-border);
    background: rgba(255, 255, 255, 0.72);
}

.tool-shell-value span {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #6b7280;
}

.tool-shell-value input {
    width: 100%;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--tool-ink);
    font-size: 16px;
    font-weight: 700;
    outline: none;
}

.tool-shell-swatch {
    width: 100%;
    min-height: 220px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), 0 20px 40px rgba(17, 24, 39, 0.08);
}

.tool-shell-links {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.tool-shell-links a {
    display: block;
    padding: 20px;
    border-radius: 22px;
    border: 1px solid var(--tool-border);
    background: rgba(255, 255, 255, 0.7);
    color: var(--tool-ink);
    text-decoration: none;
    box-shadow: 0 14px 28px rgba(17, 24, 39, 0.06);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.tool-shell-links a:hover {
    transform: translateY(-4px);
    border-color: rgba(218, 42, 39, 0.24);
    box-shadow: 0 20px 40px rgba(218, 42, 39, 0.12);
}

.tool-shell-links strong,
.tool-shell-links span {
    display: block;
}

.tool-shell-links span {
    margin-top: 8px;
    color: var(--tool-copy);
    line-height: 1.6;
}

body.tool-shell-page--workspace {
    padding-top: 88px;
    overflow-x: hidden;
}

body.tool-shell-page--workspace .tool-shell-main {
    max-width: none;
}

body.tool-shell-page--workspace .tool-shell-hero {
    max-width: 1200px;
    margin: 0 auto 18px;
}

body.tool-shell-page--workspace #main {
    margin-top: 12px;
}

body.tool-shell-page--workspace .tool-shell-frame {
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

body.tool-layer-page {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    overflow: hidden;
    background: #d7d7d7;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

body.tool-layer-page .tool-shell-topbar {
    left: 16px;
    right: 16px;
    top: 16px;
    z-index: 9998;
    background: rgba(255, 255, 255, 0.68);
    border-color: rgba(255, 255, 255, 0.48);
}

body.tool-layer-page .tool-shell-btn {
    min-height: 38px;
}

@media (max-width: 991px) {
    body.tool-shell-page {
        padding-top: 108px;
    }

    .tool-shell-topbar {
        left: 14px;
        right: 14px;
    }

    .tool-shell-inline,
    .tool-shell-grid,
    .tool-shell-links,
    .tool-shell-value-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    body.tool-shell-page,
    body.tool-shell-page--workspace {
        padding: 112px 14px 24px;
    }

    .tool-shell-topbar {
        padding: 12px 14px;
        border-radius: 18px;
    }

    .tool-shell-brand__copy span {
        display: none;
    }

    .tool-shell-hero,
    .tool-shell-frame,
    .tool-shell-frame--wide {
        padding: 20px;
        border-radius: 22px;
    }
}