:root {
    --pu-blue-900: #01579b;
    --pu-blue-800: #0277bd;
    --pu-blue-700: #0288d1;
    --pu-blue-600: #039be5;
    --pu-blue-500: #29b6f6;
    --pu-blue-100: #e3f4fc;
    --pu-blue-50: #f0f9ff;
    --pu-green: #43b97a;
    --pu-green-soft: #9ae6b4;
    --pu-gray-50: #f8fafc;
    --pu-gray-100: #f1f5f9;
    --pu-gray-200: #e2e8f0;
    --pu-gray-400: #94a3b8;
    --pu-gray-500: #64748b;
    --pu-gray-700: #334155;
    --pu-gray-900: #0f172a;
    --pu-radius-sm: 10px;
    --pu-radius: 14px;
    --pu-radius-lg: 20px;
    --pu-shadow-sm: 0 2px 12px rgba(15, 23, 42, 0.06);
    --pu-shadow: 0 8px 30px rgba(2, 136, 209, 0.1);
    --pu-shadow-hover: 0 14px 40px rgba(2, 136, 209, 0.14);
    --pu-font: 'Inter', 'Nunito', system-ui, -apple-system, sans-serif;
    --pu-transition: 0.22s ease;
}

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

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--pu-font);
    background: linear-gradient(180deg, var(--pu-gray-50) 0%, #fff 240px);
    color: var(--pu-gray-700);
    -webkit-font-smoothing: antialiased;
}

main {
    flex: 1;
}

.site-main {
    flex: 1;
    padding-block: 2rem 3rem;
}

.site-layout {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 1.75rem;
    max-width: 1320px;
    margin-inline: auto;
    padding-inline: 1.25rem;
}

.site-content {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 840px;
}

/* ── Ad sidebars ── */
.ad-sidebar {
    flex: 0 0 150px;
    position: sticky;
    top: 1.25rem;
}

.ad-sidebar-box {
    border: 1px solid var(--pu-gray-200);
    border-radius: var(--pu-radius);
    background: var(--pu-gray-50);
    min-height: 420px;
    padding: 1.25rem 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.ad-sidebar-text {
    margin: 0;
    color: var(--pu-gray-400);
    font-size: 0.78rem;
    line-height: 1.65;
    letter-spacing: 0.01em;
}

.ad-sidebar-text a {
    color: var(--pu-blue-700);
    font-weight: 600;
    text-decoration: none;
}

.ad-sidebar-text a:hover {
    text-decoration: underline;
}

@media (max-width: 1199.98px) {
    .ad-sidebar {
        display: none;
    }

    .site-layout {
        gap: 0;
    }

    .site-content {
        max-width: 100%;
    }
}

@media (min-width: 1200px) {
    .site-main {
        padding-block: 2.5rem 3.5rem;
    }
}

h1, h2, h3, h4, h5, h6 {
    color: var(--pu-gray-900);
    letter-spacing: -0.02em;
}

/* ── Navbar ── */
.site-navbar {
    background: linear-gradient(135deg, #1a2f45 0%, #243b55 100%);
    padding-block: 0.85rem;
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.15);
}

.site-navbar .container {
    gap: 1rem;
}

.site-logo {
    height: 38px;
    width: auto;
    transition: transform var(--pu-transition);
}

.site-logo:hover {
    transform: scale(1.02);
}

.site-logo-footer {
    height: 46px;
    width: auto;
}

.site-logo-hero {
    height: 130px;
    width: auto;
}

.nav-tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
}

.btn-tool {
    color: #fff;
    border: none;
    border-radius: 999px;
    padding: 0.42rem 0.95rem;
    font-size: 0.84rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: transform var(--pu-transition), box-shadow var(--pu-transition), filter var(--pu-transition);
}

.btn-tool:hover,
.btn-tool:focus {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
    filter: brightness(1.06);
}

.btn-tool.active {
    color: #fff;
    filter: brightness(1.12);
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35), 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-tool-merge { background-color: var(--pu-blue-900); }
.btn-tool-split { background-color: var(--pu-blue-800); }
.btn-tool-reorder { background-color: var(--pu-blue-700); }
.btn-tool-manipulate { background-color: var(--pu-blue-600); }

/* ── Language selector ── */
.lang-dropdown .btn-lang {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: #fff;
    border-radius: 999px;
    font-size: 0.84rem;
    font-weight: 600;
    padding: 0.4rem 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    transition: background var(--pu-transition), border-color var(--pu-transition);
}

.lang-dropdown .btn-lang:hover,
.lang-dropdown .btn-lang:focus {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.28);
    color: #fff;
}

.lang-dropdown .dropdown-menu {
    border: 1px solid var(--pu-gray-200);
    border-radius: var(--pu-radius-sm);
    box-shadow: var(--pu-shadow);
    padding: 0.35rem;
    min-width: 11rem;
}

.lang-dropdown form {
    margin: 0;
}

.lang-dropdown .dropdown-item {
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    transition: background var(--pu-transition);
    width: 100%;
    border: none;
    background: transparent;
    text-align: left;
}

.lang-dropdown .dropdown-item.active,
.lang-dropdown .dropdown-item:active {
    background: var(--pu-blue-50);
    color: var(--pu-blue-800);
}

.lang-flag {
    width: 1.25rem;
    height: 0.9rem;
    border-radius: 2px;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
    flex-shrink: 0;
}

/* ── Buttons ── */
.btn-pu {
    border-radius: 999px;
    font-weight: 600;
    padding: 0.55rem 1.25rem;
    transition: transform var(--pu-transition), box-shadow var(--pu-transition), background var(--pu-transition);
}

.btn-pu:hover {
    transform: translateY(-1px);
}

.btn-pu-primary {
    background: var(--pu-blue-700);
    border-color: var(--pu-blue-700);
    color: #fff;
}

.btn-pu-primary:hover,
.btn-pu-primary:focus {
    background: var(--pu-blue-800);
    border-color: var(--pu-blue-800);
    color: #fff;
    box-shadow: 0 8px 20px rgba(2, 136, 209, 0.25);
}

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

.btn-pu-success:hover,
.btn-pu-success:focus {
    background: #359665;
    border-color: #359665;
    color: #fff;
    box-shadow: 0 8px 20px rgba(67, 185, 122, 0.28);
}

.btn-pu-outline {
    background: transparent;
    border: 1.5px solid var(--pu-blue-200, var(--pu-gray-200));
    color: var(--pu-blue-800);
}

.btn-pu-outline:hover {
    background: var(--pu-blue-50);
    border-color: var(--pu-blue-500);
    color: var(--pu-blue-900);
}

.btn-pu-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.05rem;
}

/* ── Cards ── */
.card-tool {
    border: 1px solid var(--pu-gray-200);
    border-radius: var(--pu-radius);
    box-shadow: var(--pu-shadow-sm);
    background: #fff;
    transition: transform var(--pu-transition), box-shadow var(--pu-transition), border-color var(--pu-transition);
    height: 100%;
}

.card-tool:hover {
    transform: translateY(-3px);
    box-shadow: var(--pu-shadow-hover);
    border-color: rgba(2, 136, 209, 0.22);
}

.card-tool .card-body {
    padding: 1.65rem;
}

.card-tool-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--pu-blue-50);
    color: var(--pu-blue-700);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.card-tool-icon svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.card-panel {
    border: 1px solid var(--pu-gray-200);
    border-radius: var(--pu-radius-lg);
    box-shadow: var(--pu-shadow-sm);
    background: #fff;
    overflow: hidden;
}

.card-panel .card-body {
    padding: 1.75rem 1.85rem;
}

@media (min-width: 768px) {
    .card-panel .card-body {
        padding: 2rem 2.25rem;
    }
}

/* ── Hero ── */
.hero-section {
    text-align: center;
    padding: 1rem 0 2.5rem;
}

.hero-section h1 {
    font-size: clamp(1.85rem, 4vw, 2.65rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
}

.hero-section .hero-subtitle {
    font-size: 1.05rem;
    color: var(--pu-gray-500);
    max-width: 34rem;
    margin-inline: auto;
    line-height: 1.65;
}

.hero-upload {
    margin-top: 2.25rem;
    max-width: 36rem;
    margin-inline: auto;
    border: 2px dashed rgba(2, 136, 209, 0.35);
    border-radius: var(--pu-radius-lg);
    background: linear-gradient(180deg, #fff 0%, var(--pu-blue-50) 100%);
    padding: 2.25rem 1.75rem;
    transition: border-color var(--pu-transition), box-shadow var(--pu-transition), transform var(--pu-transition);
}

.hero-upload:hover {
    border-color: var(--pu-blue-500);
    box-shadow: var(--pu-shadow);
    transform: translateY(-2px);
}

.hero-upload-icon {
    width: 52px;
    height: 52px;
    margin-inline: auto;
    border-radius: 14px;
    background: #fff;
    color: var(--pu-blue-700);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--pu-shadow-sm);
    margin-bottom: 1rem;
}

.hero-upload-icon svg {
    width: 26px;
    height: 26px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.75;
}

.hero-upload h2 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.hero-upload p {
    color: var(--pu-gray-500);
    font-size: 0.92rem;
    margin-bottom: 1.15rem;
}

/* ── Drop zone ── */
.drop-zone {
    border: 2px dashed rgba(2, 136, 209, 0.32);
    border-radius: var(--pu-radius-lg);
    background: var(--pu-blue-50);
    padding: 2.5rem 1.75rem;
    text-align: center;
    transition: border-color var(--pu-transition), background var(--pu-transition), box-shadow var(--pu-transition), transform var(--pu-transition);
}

.drop-zone:hover {
    border-color: rgba(2, 136, 209, 0.5);
}

.drop-zone--active {
    border-color: var(--pu-blue-600) !important;
    background: #fff !important;
    box-shadow: 0 0 0 4px rgba(2, 136, 209, 0.12);
    transform: scale(1.005);
}

.drop-zone-copy .drop-zone-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--pu-blue-800);
    margin-bottom: 0.35rem;
}

.drop-zone-copy .drop-zone-sub {
    color: var(--pu-gray-500);
    font-size: 0.92rem;
    margin-bottom: 0;
}

/* ── Sections ── */
.section-spaced {
    padding-block: 3rem;
}

.section-spaced:first-of-type {
    padding-top: 1rem;
}

.section-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.trust-grid .trust-item {
    padding: 1.15rem;
    border-radius: var(--pu-radius-sm);
    background: var(--pu-gray-50);
    height: 100%;
    transition: background var(--pu-transition);
}

.trust-grid .trust-item:hover {
    background: var(--pu-blue-50);
}

.trust-grid strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
    color: var(--pu-gray-900);
}

.privacy-card {
    border: 1px solid rgba(67, 185, 122, 0.25);
    border-radius: var(--pu-radius);
    background: linear-gradient(135deg, #fff 0%, #f4fbf7 100%);
}

.privacy-card .privacy-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(67, 185, 122, 0.12);
    color: var(--pu-green);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.privacy-card .privacy-icon svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.75;
}

/* ── Footer ── */
.site-footer {
    background: linear-gradient(135deg, #1a2f45 0%, #162636 100%);
    color: #94a3b8;
    padding-top: 3rem;
}

.site-footer a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color var(--pu-transition);
}

.site-footer a:hover {
    color: #fff;
}

.site-footer h5 {
    color: #f1f5f9;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

/* ── Alerts & pills ── */
.alert-soft {
    background: var(--pu-blue-50);
    border: 1px solid rgba(2, 136, 209, 0.15);
    border-radius: var(--pu-radius-sm);
    color: var(--pu-gray-700);
}

.nav-pills .nav-link {
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--pu-gray-500);
    padding: 0.45rem 0.95rem;
    transition: background var(--pu-transition), color var(--pu-transition);
}

.nav-pills .nav-link.active {
    background: var(--pu-blue-700);
}

.nav-pills .nav-link:not(.active):hover {
    background: var(--pu-blue-50);
    color: var(--pu-blue-800);
}

.page-card {
    cursor: grab;
    transition: transform var(--pu-transition), box-shadow var(--pu-transition);
    border-radius: var(--pu-radius-sm);
}

.page-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--pu-shadow-sm);
}

/* ── Modal ── */
.modal-content {
    border: none;
    border-radius: var(--pu-radius);
    box-shadow: var(--pu-shadow-hover);
}

@media (max-width: 991.98px) {
    .site-navbar .nav-tools {
        order: 3;
        width: 100%;
    }

    .hero-section {
        padding-top: 1.5rem;
    }
}

@media (max-width: 575.98px) {
    .card-tool .card-body {
        padding: 1.25rem;
    }

    .drop-zone {
        padding: 1.75rem 1.15rem;
    }

    .hero-upload {
        padding: 1.75rem 1.15rem;
    }
}