/* ========================================================================== 
   Rhythm modern UI foundation
   Shared by the homepage and whitepaper. Page-specific layout stays in the
   matching *-modern.css file so legacy pages remain stable.
   ========================================================================== */

:root {
    --rhythm-bg: #090b0f;
    --rhythm-bg-soft: #0f1319;
    --rhythm-surface: rgba(20, 25, 33, 0.82);
    --rhythm-surface-solid: #141921;
    --rhythm-surface-raised: #1a2029;
    --rhythm-border: rgba(255, 255, 255, 0.10);
    --rhythm-border-strong: rgba(255, 255, 255, 0.17);
    --rhythm-text: #f7f8fb;
    --rhythm-muted: #9ba6b5;
    --rhythm-green: #38e58c;
    --rhythm-green-dark: #1ebf6e;
    --rhythm-cyan: #57d7ff;
    --rhythm-violet: #a78bfa;
    --rhythm-danger: #ff6b7a;
    --rhythm-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
    --rhythm-radius-sm: 14px;
    --rhythm-radius-md: 22px;
    --rhythm-radius-lg: 34px;
    --rhythm-content: 1240px;
    --rhythm-ease: 180ms ease;
}

/* Base and accessibility -------------------------------------------------- */

html {
    scroll-behavior: smooth;
}

body.modern-page,
body.modern-page * {
    box-sizing: border-box;
}

body.modern-page * {
    font-family: Inter, "Segoe UI", Helvetica, Arial, sans-serif !important;
}

body.modern-page .fa,
body.modern-page .fas {
    font-family: "Font Awesome 5 Pro" !important;
}

body.modern-page {
    overflow-x: hidden;
    background:
        radial-gradient(circle at 15% 5%, rgba(56, 229, 140, 0.08), transparent 28rem),
        radial-gradient(circle at 85% 25%, rgba(87, 215, 255, 0.06), transparent 30rem),
        var(--rhythm-bg);
    color: var(--rhythm-text);
    text-rendering: optimizeLegibility;
}

body.modern-page a,
body.modern-page button,
body.modern-page input,
body.modern-page .item {
    transition: color var(--rhythm-ease), background var(--rhythm-ease), border-color var(--rhythm-ease), box-shadow var(--rhythm-ease), transform var(--rhythm-ease), opacity var(--rhythm-ease);
}

body.modern-page img {
    max-width: 100%;
}

body.modern-page ::selection {
    color: #06110b;
    background: var(--rhythm-green);
}

body.modern-page :focus-visible {
    outline: 3px solid rgba(87, 215, 255, 0.82);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    z-index: 2000;
    top: 12px;
    left: 12px;
    padding: 11px 16px;
    border-radius: 10px;
    color: #08120d;
    background: var(--rhythm-green);
    font-weight: 750;
    transform: translateY(-160%);
}

.skip-link:focus {
    transform: translateY(0);
}

body.modern-page .eyebrow {
    margin: 0 0 14px;
    color: var(--rhythm-green);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

body.modern-page .text-link {
    color: var(--rhythm-text);
    font-weight: 750;
    text-decoration: none;
}

body.modern-page .text-link:hover {
    color: var(--rhythm-green);
}

/* Navigation -------------------------------------------------------------- */

body.modern-page .navigation {
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--rhythm-border);
    background: rgba(9, 11, 15, 0.68);
    backdrop-filter: blur(18px) saturate(130%);
    -webkit-backdrop-filter: blur(18px) saturate(130%);
}

body.modern-page .navigation.sticky {
    padding: 8px 0;
    background: rgba(9, 11, 15, 0.92);
    box-shadow: 0 16px 38px rgba(0, 0, 0, 0.22);
}

body.modern-page .navigation-container {
    width: min(calc(100% - 48px), var(--rhythm-content));
    margin: 0 auto;
}

body.modern-page .navigation .logo {
    width: 122px;
    height: 56px;
    flex: 0 0 auto;
    background-position: left center;
}

body.modern-page .navigation-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

body.modern-page .navigation-menu button,
body.modern-page .navigation-menu a {
    min-width: 0;
    margin: 0 !important;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: 999px;
    color: var(--rhythm-muted);
    font-size: 0.84rem;
    font-weight: 700;
    line-height: 1;
}

body.modern-page .navigation-menu button:hover,
body.modern-page .navigation-menu a:hover,
body.modern-page .navigation-menu .selected {
    border-color: var(--rhythm-border);
    color: var(--rhythm-text);
    background: rgba(255, 255, 255, 0.055);
}

body.modern-page .navigation-menu button.buy {
    width: auto;
    min-width: 112px;
    margin-left: 8px !important;
    padding: 13px 20px;
    border: 1px solid rgba(56, 229, 140, 0.42);
    border-radius: 999px;
    color: #06130c !important;
    background: linear-gradient(135deg, var(--rhythm-green), #70f0ad);
    box-shadow: 0 12px 30px rgba(56, 229, 140, 0.18);
}

body.modern-page .navigation-menu button.buy:hover {
    border-color: rgba(112, 240, 173, 0.8);
    color: #06130c !important;
    background: linear-gradient(135deg, #70f0ad, var(--rhythm-green));
    box-shadow: 0 14px 34px rgba(56, 229, 140, 0.28);
    transform: translateY(-1px);
}

body.modern-page .menu-toggler {
    width: 46px;
    height: 46px;
    padding: 9px;
    border: 1px solid var(--rhythm-border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.04);
}

body.modern-page .menu-toggler span {
    height: 2px;
    border-radius: 999px;
    background: var(--rhythm-text);
}

/* Footer ----------------------------------------------------------------- */

body.modern-page footer {
    min-height: 0;
    margin-top: 0;
    border-top: 1px solid var(--rhythm-border);
    background: #080a0d;
}

body.modern-page .footer-container {
    width: min(calc(100% - 48px), var(--rhythm-content));
    max-width: none;
    padding: 72px 0 60px;
    gap: 48px;
}

body.modern-page .footer-container > img {
    width: 168px;
    height: auto;
}

body.modern-page .footer-container .columns {
    gap: clamp(38px, 6vw, 88px);
}

body.modern-page .footer-container .column {
    margin: 0;
}

body.modern-page .column h2 {
    margin-bottom: 18px;
    color: var(--rhythm-text);
    font-size: 0.92rem;
    font-weight: 750;
}

body.modern-page .column li a {
    padding: 5px 0;
    color: var(--rhythm-muted);
    font-size: 0.86rem;
}

body.modern-page .column li a:hover {
    color: var(--rhythm-green);
}

body.modern-page .social {
    display: inline-grid;
    width: 40px;
    height: 40px;
    margin: 0 5px 5px 0;
    place-items: center;
    border: 1px solid var(--rhythm-border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.035);
}

body.modern-page .social:hover {
    border-color: rgba(56, 229, 140, 0.45);
    background: rgba(56, 229, 140, 0.08);
    transform: translateY(-2px);
}

body.modern-page .social svg,
body.modern-page .social img {
    width: 26px !important;
    height: 26px !important;
}

body.modern-page .copyright {
    position: static;
    display: grid;
    width: 100%;
    height: auto;
    min-height: 64px;
    place-items: center;
    border-top: 1px solid var(--rhythm-border);
    color: #73808f;
    background: transparent;
}

body.modern-page .copyrightText p {
    margin: 0;
}

/* Shared popup treatment -------------------------------------------------- */

body.modern-page .swal2-popup {
    border: 1px solid var(--rhythm-border-strong);
    border-radius: var(--rhythm-radius-md);
    background: var(--rhythm-surface-solid) !important;
    box-shadow: var(--rhythm-shadow);
}

body.modern-page .rhythm-popup a {
    border: 1px solid rgba(56, 229, 140, 0.45);
    border-radius: 999px;
}

/* Responsive shared chrome ---------------------------------------------- */

@media (max-width: 1050px) {
    body.modern-page .navigation .navigation-menu {
        display: block;
        width: min(86vw, 390px);
        max-width: none;
        padding: 96px 28px 40px;
        border-left: 1px solid var(--rhythm-border);
        background: rgba(13, 16, 22, 0.98);
        box-shadow: -30px 0 70px rgba(0, 0, 0, 0.38);
    }

    body.modern-page .navigation .navigation-menu a,
    body.modern-page .navigation .navigation-menu button {
        width: 100%;
        margin: 8px 0 !important;
        padding: 14px 16px;
        text-align: left;
        font-size: 1rem;
    }

    body.modern-page .navigation .navigation-menu button.buy {
        width: 100%;
        margin-top: 18px !important;
        text-align: center;
    }
}

@media (max-width: 700px) {
    body.modern-page .navigation-container,
    body.modern-page .footer-container {
        width: min(calc(100% - 32px), var(--rhythm-content));
    }

    body.modern-page .navigation .logo {
        width: 108px;
        height: 48px;
    }

    body.modern-page .footer-container {
        align-items: flex-start;
        justify-content: flex-start;
        padding: 54px 0 44px;
    }

    body.modern-page .footer-container .columns {
        width: 100%;
        gap: 32px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    body.modern-page *,
    body.modern-page *::before,
    body.modern-page *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}