/* ============================================
   Refract — Shared brand system
   Used by refractai.html, refract-lens.html, refract-mesh.html
   ============================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #00d946;
    --primary-bright: #00ff66;
    --violet: #8b5cf6;
    --cyan: #06b6d4;
    --amber: #fbbf24;
    --rose: #f472b6;

    --ink: #06080b;
    --ink-2: #0c1016;
    --ink-3: #11161e;
    --ink-4: #1a1f29;

    --slate-100: #f5f7fa;
    --slate-200: #e2e6ee;
    --slate-300: #aab1c2;
    --slate-400: #8089a0;
    --slate-500: #6b7480;
    --slate-600: #4a5160;
    --slate-700: #3a4150;

    --r-sm: 6px;
    --r-md: 10px;
    --r-lg: 14px;
    --r-xl: 22px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--ink);
    color: var(--slate-300);
    line-height: 1.65;
    letter-spacing: 0.1px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
    font-family: 'Manrope', 'Inter', sans-serif;
    color: var(--slate-100);
}

a { color: inherit; text-decoration: none; }
::selection { background: var(--primary); color: var(--ink); }

.prism-text {
    background: linear-gradient(120deg, var(--violet) 0%, var(--cyan) 30%, var(--primary) 60%, var(--amber) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 200% 100%;
    animation: prism-shift 8s ease-in-out infinite;
}

.prism-text-cool {
    background: linear-gradient(120deg, var(--violet) 0%, var(--cyan) 50%, var(--primary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 200% 100%;
    animation: prism-shift 10s ease-in-out infinite;
}

@keyframes prism-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes pulse-dot {
    0%, 100% { opacity: 0.7; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* ============================================
   Preview / Coming Soon banner (sits above nav)
   ============================================ */
.preview-banner {
    position: relative;
    z-index: 110;
    background:
        linear-gradient(90deg,
            rgba(139, 92, 246, 0.12) 0%,
            rgba(6, 182, 212, 0.10) 33%,
            rgba(0, 217, 70, 0.12) 66%,
            rgba(251, 191, 36, 0.10) 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0.55rem 1.5rem;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.74rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--slate-200);
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.preview-banner .pb-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--amber);
    box-shadow: 0 0 8px rgba(251, 191, 36, 0.7);
    margin-right: 0.55rem;
    vertical-align: 1px;
    animation: pulse-dot 2.4s ease infinite;
}

.preview-banner strong { color: var(--slate-100); margin: 0 0.3rem; }

.preview-banner.lens .pb-dot { background: var(--amber); box-shadow: 0 0 8px rgba(251, 191, 36, 0.7); }
.preview-banner.mesh .pb-dot { background: var(--cyan); box-shadow: 0 0 8px rgba(6, 182, 212, 0.7); }

/* ============================================
   Nav
   ============================================ */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: rgba(6, 8, 11, 0.7);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.95rem 2.5rem;
}

.nav-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: 'Manrope', sans-serif;
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--slate-100);
    letter-spacing: -0.4px;
}

.logo-mark {
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.logo .stream-tag {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    margin-left: 0.2rem;
    border: 1px solid;
}

.logo .tag-ai { color: var(--primary); background: rgba(0, 217, 70, 0.1); border-color: rgba(0, 217, 70, 0.24); }
.logo .tag-lens { color: var(--amber); background: rgba(251, 191, 36, 0.1); border-color: rgba(251, 191, 36, 0.28); }
.logo .tag-mesh { color: var(--cyan); background: rgba(6, 182, 212, 0.1); border-color: rgba(6, 182, 212, 0.28); }

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--slate-300);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--slate-100); }

.nav-streams {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0.25rem;
    border-radius: 100px;
}

.nav-streams a {
    padding: 0.4rem 0.85rem;
    border-radius: 100px;
    font-size: 0.78rem;
    font-weight: 600;
    transition: all 0.2s;
}

.nav-streams a.active-lens { background: rgba(251, 191, 36, 0.12); color: var(--amber); }
.nav-streams a.active-mesh { background: rgba(6, 182, 212, 0.12); color: var(--cyan); }
.nav-streams a:not(.active-lens):not(.active-mesh):hover { background: rgba(255, 255, 255, 0.05); color: var(--slate-100); }

.nav-cta {
    background: var(--primary);
    color: var(--ink) !important;
    padding: 0.55rem 1.25rem;
    border-radius: var(--r-sm);
    font-weight: 700 !important;
    font-size: 0.85rem !important;
    box-shadow: 0 4px 18px rgba(0, 217, 70, 0.25);
    transition: all 0.2s;
}

.nav-cta:hover { background: var(--primary-bright); transform: translateY(-1px); }

.nav-cta.cyan { background: var(--cyan); box-shadow: 0 4px 18px rgba(6, 182, 212, 0.3); }
.nav-cta.cyan:hover { background: #22d3ee; }

.nav-cta.amber { background: var(--amber); box-shadow: 0 4px 18px rgba(251, 191, 36, 0.3); }
.nav-cta.amber:hover { background: #fcd34d; }

.nav-secondary { color: var(--slate-300) !important; font-size: 0.85rem !important; }

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 13px 26px;
    border-radius: var(--r-sm);
    font-family: inherit;
    font-weight: 700;
    font-size: 0.92rem;
    border: none;
    cursor: pointer;
    transition: all 0.22s;
    letter-spacing: 0.2px;
}

.btn-primary { background: var(--primary); color: var(--ink); box-shadow: 0 6px 24px rgba(0, 217, 70, 0.32); }
.btn-primary:hover { background: var(--primary-bright); transform: translateY(-1px); box-shadow: 0 10px 32px rgba(0, 217, 70, 0.42); }

.btn-cyan { background: var(--cyan); color: var(--ink); box-shadow: 0 6px 24px rgba(6, 182, 212, 0.35); }
.btn-cyan:hover { background: #22d3ee; transform: translateY(-1px); }

.btn-amber { background: var(--amber); color: var(--ink); box-shadow: 0 6px 24px rgba(251, 191, 36, 0.32); }
.btn-amber:hover { background: #fcd34d; transform: translateY(-1px); }

.btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    color: var(--slate-100);
    border: 1px solid rgba(255, 255, 255, 0.14);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.4); }

/* ============================================
   Common section structure
   ============================================ */
.section { padding: 7rem 2.5rem; position: relative; }

.section-inner { max-width: 1280px; margin: 0 auto; position: relative; z-index: 1; }

.section-eyebrow {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2.4px;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 1rem;
}

.section-eyebrow.cyan { color: var(--cyan); }
.section-eyebrow.amber { color: var(--amber); }
.section-eyebrow.violet { color: var(--violet); }

.section h2 {
    font-size: clamp(2.1rem, 3.8vw, 3.4rem);
    font-weight: 800;
    color: var(--slate-100);
    letter-spacing: -1.4px;
    line-height: 1.05;
    margin-bottom: 1.2rem;
}

.section-lead {
    font-size: 1.05rem;
    color: var(--slate-400);
    line-height: 1.7;
    max-width: 620px;
    margin-bottom: 3rem;
}

.section-head-center {
    text-align: center;
    margin: 0 auto 4rem;
    max-width: 740px;
}

.section-head-center .section-lead { margin-left: auto; margin-right: auto; }

/* ============================================
   Badge (status pill)
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.4rem 0.9rem;
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--slate-200);
    margin-bottom: 1.5rem;
}

.badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 10px rgba(0, 217, 70, 0.7);
    animation: pulse-dot 2.4s ease infinite;
}

.badge.amber .dot { background: var(--amber); box-shadow: 0 0 10px rgba(251, 191, 36, 0.7); }
.badge.cyan .dot { background: var(--cyan); box-shadow: 0 0 10px rgba(6, 182, 212, 0.7); }
.badge.violet .dot { background: var(--violet); box-shadow: 0 0 10px rgba(139, 92, 246, 0.7); }

/* ============================================
   Footer
   ============================================ */
.footer {
    background: #03050a;
    padding: 4rem 2.5rem 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-brand p {
    color: var(--slate-500);
    font-size: 0.85rem;
    line-height: 1.7;
    max-width: 320px;
    margin-top: 1rem;
}

.footer-col h5 {
    color: var(--slate-100);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col a { color: var(--slate-400); font-size: 0.86rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--slate-100); }

.footer-bottom {
    max-width: 1280px;
    margin: 1.5rem auto 0;
    display: flex;
    justify-content: space-between;
    color: var(--slate-500);
    font-size: 0.78rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.footer-bottom a { color: var(--primary); }

/* ============================================
   Responsive base — aggressive mobile compaction
   ============================================ */
@media (max-width: 1024px) {
    .nav { padding: 0.8rem 1.5rem; }
    .nav-inner { gap: 1rem; }
    .nav-links { gap: 1rem; }
}

@media (max-width: 720px) {
    /* Preview banner */
    .preview-banner { font-size: 0.62rem; letter-spacing: 1px; padding: 0.45rem 0.85rem; }
    .preview-banner strong { display: inline; }

    /* Nav */
    .nav { padding: 0.6rem 1rem; }
    .nav-inner { gap: 0.6rem; }
    .nav-streams { display: none; }
    .nav-links li:not(:last-child):not(.nav-keep) { display: none; }
    .nav-cta { padding: 0.45rem 0.85rem !important; font-size: 0.78rem !important; }
    .logo { font-size: 0.92rem; }
    .logo-mark { width: 22px; height: 22px; }
    .logo .stream-tag { font-size: 0.62rem; padding: 0.1rem 0.35rem; }

    /* Section padding compaction */
    .section { padding: 3.2rem 1.1rem; }
    .section h2 { font-size: 1.7rem; letter-spacing: -0.7px; }
    .section-lead { font-size: 0.92rem; line-height: 1.55; margin-bottom: 2rem; }
    .section-eyebrow { font-size: 0.66rem; letter-spacing: 1.6px; margin-bottom: 0.7rem; }
    .section-head-center { margin-bottom: 2.4rem; }

    /* Buttons */
    .btn { padding: 13px 24px; font-size: 0.9rem; min-height: 44px; justify-content: center; }

    /* Badge */
    .badge { font-size: 0.64rem; padding: 0.32rem 0.75rem; margin-bottom: 1rem; letter-spacing: 1px; }

    /* Footer */
    .footer { padding: 2.5rem 1.1rem 1.5rem; }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 1.5rem; padding-bottom: 1.8rem; }
    .footer-brand { grid-column: span 2; }
    .footer-brand p { font-size: 0.78rem; max-width: 100%; }
    .footer-col h5 { font-size: 0.7rem; margin-bottom: 0.7rem; }
    .footer-col a { font-size: 0.8rem; }
    .footer-col ul { gap: 0.45rem; }
    .footer-bottom { font-size: 0.7rem; flex-direction: column; align-items: flex-start; gap: 0.4rem; margin-top: 1.2rem; }
}

@media (max-width: 480px) {
    .footer-inner { grid-template-columns: 1fr; }
    .footer-brand { grid-column: span 1; }
    .section h2 { font-size: 1.5rem; }
    .preview-banner { font-size: 0.58rem; }
}

/* =====================================================================
   MOBILE OPTIMIZATION — global safety + hamburger nav for Refract pages
   ===================================================================== */

html { -webkit-text-size-adjust: 100%; }
html, body { max-width: 100%; overflow-x: hidden; }
img, svg, video, iframe, canvas { max-width: 100%; height: auto; }
.nav-inner, .footer-inner, .section-inner { min-width: 0; }

/* Hamburger toggle */
.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--r-sm);
    cursor: pointer;
    padding: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-left: auto;
    transition: background 0.2s ease;
}
.nav-toggle:hover { background: rgba(255, 255, 255, 0.08); }
.nav-toggle-bar {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--slate-100);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav.nav-open .nav-toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav.nav-open .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav.nav-open .nav-toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

body.nav-open { overflow: hidden; }

@media (max-width: 720px) {
    .nav-toggle { display: inline-flex; }
    .nav-inner { position: relative; }
    .nav-inner > .logo { margin-right: auto; }

    .nav .nav-links {
        position: absolute;
        top: calc(100% + 1px);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 0.6rem 1rem 1rem;
        background: rgba(6, 8, 11, 0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        pointer-events: none;
        transition: max-height 0.28s ease, opacity 0.2s ease, padding 0.2s ease;
    }
    .nav.nav-open .nav-links {
        max-height: 80vh;
        opacity: 1;
        pointer-events: auto;
        overflow-y: auto;
    }
    .nav .nav-links li { display: block !important; width: 100%; }
    .nav .nav-links li a {
        display: block;
        padding: 0.85rem 0.4rem;
        font-size: 0.98rem;
        font-weight: 600;
        color: var(--slate-100);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        min-height: 44px;
        line-height: 1.4;
    }
    .nav .nav-links li:last-child a { border-bottom: none; }
    .nav .nav-streams {
        display: flex !important;
        margin: 0.4rem 0;
        background: rgba(255, 255, 255, 0.04);
        justify-content: center;
        gap: 0.3rem;
    }
    .nav .nav-streams a { padding: 0.5rem 0.85rem; }
    .nav .nav-cta {
        margin-top: 0.4rem;
        text-align: center;
        padding: 0.85rem 1rem !important;
    }
}

@media (max-width: 480px) {
    .section { padding: 2.6rem 1rem; }
    .section h2 { font-size: 1.4rem; }
    .preview-banner { font-size: 0.55rem; padding: 0.4rem 0.65rem; letter-spacing: 0.8px; }
    .preview-banner strong { display: none; }
    .footer { padding: 2rem 1rem 1.2rem; }
    .footer-bottom { flex-direction: column; align-items: flex-start; }
    .btn { width: 100%; justify-content: center; }
}

@media (max-width: 360px) {
    .section h2 { font-size: 1.3rem; }
    .logo { font-size: 0.85rem; }
    .logo .stream-tag { display: none; }
}