:root {
    --ink: #17212b;
    --muted: #667085;
    --line: #d9e2ec;
    --paper: #ffffff;
    --soft: #f5f8fb;
    --mint: #0e9f6e;
    --blue: #2563eb;
    --amber: #f59e0b;
    --rose: #e11d48;
    --shadow: 0 14px 40px rgba(17, 24, 39, 0.08);
}

* {
    box-sizing: border-box;
}

body.p4u {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
}

.p4u a {
    color: inherit;
    text-decoration: none;
}

.p4u-container {
    width: min(1160px, calc(100% - 40px));
    margin: 0 auto;
}

.p4u-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
}

.p4u-nav-inner {
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.p4u-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.25rem;
}

.p4u-brand-mark {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    color: #fff;
    background: linear-gradient(135deg, var(--mint), var(--blue));
    border-radius: 8px;
}

.p4u-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.p4u-menu > li {
    position: relative;
}

.p4u-menu a,
.p4u-menu button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 38px;
    padding: 0 12px;
    border: 0;
    border-radius: 8px;
    color: #344054;
    background: transparent;
    font: inherit;
    font-weight: 650;
    cursor: pointer;
}

.p4u-menu a:hover,
.p4u-menu button:hover,
.p4u-menu .active {
    color: var(--blue);
    background: #eff6ff;
}

.p4u-dropdown {
    display: none;
    position: absolute;
    top: 42px;
    left: 0;
    min-width: 250px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    box-shadow: var(--shadow);
}

.p4u-menu li:hover .p4u-dropdown,
.p4u-menu li:focus-within .p4u-dropdown {
    display: grid;
}

.p4u-dropdown a {
    justify-content: flex-start;
    min-height: 36px;
}

.p4u-mobile-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
}

.p4u-hero {
    min-height: calc(100vh - 68px);
    display: grid;
    align-items: center;
    padding: 72px 0;
    background:
        linear-gradient(120deg, rgba(37, 99, 235, 0.08), transparent 44%),
        linear-gradient(220deg, rgba(14, 159, 110, 0.10), transparent 46%),
        #fff;
}

.p4u-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 480px);
    gap: 56px;
    align-items: center;
}

.p4u-kicker {
    margin: 0 0 12px;
    color: var(--mint);
    font-weight: 800;
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0;
}

.p4u h1,
.p4u h2,
.p4u h3 {
    line-height: 1.12;
    letter-spacing: 0;
}

.p4u h1 {
    margin: 0 0 22px;
    font-size: clamp(2.45rem, 6vw, 4.9rem);
}

.p4u h2 {
    margin: 0 0 14px;
    font-size: clamp(1.8rem, 3vw, 2.7rem);
}

.p4u h3 {
    margin: 0 0 10px;
    font-size: 1.18rem;
}

.p4u-lead {
    max-width: 720px;
    margin: 0;
    color: var(--muted);
    font-size: 1.15rem;
}

.p4u-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.p4u-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
    font-weight: 800;
    cursor: pointer;
}

.p4u-btn.primary {
    border-color: var(--blue);
    color: #fff;
    background: var(--blue);
}

.p4u-btn.success {
    border-color: var(--mint);
    color: #fff;
    background: var(--mint);
}

.p4u-btn:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.p4u-visual {
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
}

.p4u-visual-board {
    display: grid;
    gap: 12px;
}

.p4u-preview-tile {
    min-height: 88px;
    display: grid;
    align-items: center;
    padding: 18px;
    border-radius: 8px;
    color: #fff;
    background: linear-gradient(135deg, #0f766e, #2563eb);
}

.p4u-preview-tile:nth-child(2) {
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, #1f2937, #0e9f6e);
}

.p4u-preview-tile:nth-child(3) {
    aspect-ratio: 2 / 1;
    background: linear-gradient(135deg, #9f1239, #f59e0b);
}

.p4u-section {
    padding: 74px 0;
}

.p4u-section.alt {
    background: var(--soft);
}

.p4u-section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 24px;
    margin-bottom: 28px;
}

.p4u-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.p4u-grid.four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.p4u-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 100%;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
}

.p4u-card-icon {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 8px;
    color: #fff;
    background: var(--ink);
}

.p4u-card p,
.p4u-list,
.p4u-small {
    color: var(--muted);
}

.p4u-card .p4u-btn {
    margin-top: auto;
}

.p4u-list {
    margin: 0;
    padding-left: 18px;
}

.p4u-page-hero {
    padding: 72px 0 46px;
    border-bottom: 1px solid var(--line);
    background: var(--soft);
}

.p4u-tool-shell {
    display: grid;
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.p4u-panel {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
}

.p4u-form {
    display: grid;
    gap: 14px;
}

.p4u-field {
    display: grid;
    gap: 7px;
}

.p4u-field label {
    font-weight: 750;
}

.p4u input,
.p4u select,
.p4u textarea {
    width: 100%;
    min-height: 42px;
    padding: 9px 11px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--ink);
    font: inherit;
}

.p4u input[type="checkbox"],
.p4u input[type="radio"] {
    width: auto;
    min-height: auto;
}

.p4u-dropzone {
    min-height: 180px;
    display: grid;
    place-items: center;
    padding: 22px;
    border: 2px dashed #a9b8c7;
    border-radius: 8px;
    background: #f8fbff;
    text-align: center;
    cursor: pointer;
}

.p4u-preview {
    display: grid;
    place-items: center;
    min-height: 360px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: repeating-conic-gradient(#f4f6f8 0% 25%, #fff 0% 50%) 50% / 24px 24px;
    overflow: hidden;
}

.p4u-preview canvas,
.p4u-preview img {
    max-width: 100%;
    max-height: 620px;
    height: auto;
}

.p4u-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.p4u-stat {
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--soft);
}

.p4u-stat strong {
    display: block;
    font-size: 1.1rem;
}

.p4u-ad-slot {
    min-height: 96px;
    display: grid;
    place-items: center;
    margin-top: 28px;
    border: 1px dashed #b8c4d1;
    border-radius: 8px;
    color: #7a8795;
    background: #fbfcfe;
    font-size: 0.9rem;
}

.p4u-copy {
    max-width: 840px;
}

.p4u-copy h2 {
    margin-top: 30px;
}

.p4u-footer {
    padding: 52px 0 26px;
    background: #111827;
    color: #d1d5db;
}

.p4u-footer-grid {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, 1fr);
    gap: 26px;
}

.p4u-footer h3,
.p4u-footer h4 {
    color: #fff;
}

.p4u-footer ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.p4u-footer li {
    margin: 8px 0;
}

.p4u-footer-bottom {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.12);
    color: #9ca3af;
}

@media (max-width: 980px) {
    .p4u-mobile-toggle {
        display: inline-grid;
        place-items: center;
    }

    .p4u-menu {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        padding: 14px 20px 20px;
        background: #fff;
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow);
    }

    .p4u-menu.open {
        display: grid;
        gap: 4px;
    }

    .p4u-menu a,
    .p4u-menu button {
        width: 100%;
        justify-content: flex-start;
    }

    .p4u-dropdown {
        position: static;
        display: grid;
        min-width: 0;
        margin: 4px 0 8px 12px;
        border: 0;
        box-shadow: none;
        background: var(--soft);
    }

    .p4u-hero-grid,
    .p4u-tool-shell {
        grid-template-columns: 1fr;
    }

    .p4u-grid,
    .p4u-grid.four,
    .p4u-footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .p4u-container {
        width: min(100% - 28px, 1160px);
    }

    .p4u-hero,
    .p4u-section {
        padding: 48px 0;
    }

    .p4u-section-head {
        display: block;
    }

    .p4u-grid,
    .p4u-grid.four,
    .p4u-stats,
    .p4u-footer-grid {
        grid-template-columns: 1fr;
    }

    .p4u-actions {
        flex-direction: column;
    }

    .p4u-btn {
        width: 100%;
    }
}