/* ==========================================================================
   MinerHub design system — plain CSS (no build step; host has no Node)
   Dark theme, cyan/teal accents, glassy panels, gradient CTAs.
   ========================================================================== */

:root {
    --bg: #060911;
    --bg-2: #0a0f1c;
    --panel: #0f1626;
    --panel-2: #131c30;
    --panel-3: #172136;
    --border: rgba(120, 160, 220, 0.12);
    --border-strong: rgba(120, 160, 220, 0.22);

    --text: #eaf0fb;
    --muted: #93a3bd;
    --muted-2: #6b7a95;

    --cyan: #22d3ee;
    --cyan-2: #38e0ff;
    --teal: #14b8c6;
    --green: #22c55e;
    --amber: #f5b544;
    --red: #f26d6d;
    --purple: #8b7bff;

    --grad-cta: linear-gradient(90deg, #12b6c9 0%, #1fd0a8 55%, #38d66b 100%);
    --grad-cyan: linear-gradient(90deg, #22d3ee, #38bdf8);
    --grad-text: linear-gradient(90deg, #7fe7ff, #37d0ff);

    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 22px;
    --shadow: 0 18px 50px -20px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 0 1px var(--border), 0 20px 60px -30px rgba(34, 211, 238, 0.35);

    --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --maxw: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font);
    background:
        radial-gradient(1100px 600px at 80% -10%, rgba(34, 211, 238, 0.10), transparent 60%),
        radial-gradient(900px 500px at 0% 10%, rgba(56, 214, 107, 0.06), transparent 55%),
        var(--bg);
    color: var(--text);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0 0 .5em; line-height: 1.15; font-weight: 800; letter-spacing: -0.02em; }
p { margin: 0 0 1rem; color: var(--muted); }
small { color: var(--muted-2); }

/* --- Layout ------------------------------------------------------------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1360px; }
.section { padding: 72px 0; }
.section-sm { padding: 44px 0; }
.center { text-align: center; }
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: 8px; } .gap { gap: 16px; } .gap-lg { gap: 28px; }
.wrap { flex-wrap: wrap; }
.mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:36px}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}
.hidden { display: none !important; }

/* --- Typography helpers ------------------------------------------------- */
.eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
    color: var(--cyan); padding: 6px 12px; border-radius: 999px;
    background: rgba(34, 211, 238, 0.08); border: 1px solid rgba(34, 211, 238, 0.22);
}
.gradient-text {
    background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.muted { color: var(--muted); }
.hero-title { font-size: clamp(2.2rem, 5vw, 4rem); }
.section-title { font-size: clamp(1.7rem, 3.2vw, 2.6rem); }
.lead { font-size: 1.1rem; color: var(--muted); max-width: 640px; }

/* --- Buttons ------------------------------------------------------------ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font-family: inherit; font-weight: 700; font-size: .95rem; cursor: pointer;
    padding: 12px 22px; border-radius: 999px; border: 1px solid transparent;
    transition: transform .12s ease, box-shadow .2s ease, background .2s ease, border-color .2s;
    white-space: nowrap; line-height: 1;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--grad-cta); color: #04121a; box-shadow: 0 10px 30px -12px rgba(31, 208, 168, 0.7); }
.btn-cyan { background: var(--cyan); color: #04121a; }
.btn-ghost { background: transparent; border-color: var(--border-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-outline { background: rgba(255,255,255,.02); border-color: var(--border-strong); color: var(--text); }
.btn-dark { background: var(--panel-2); border-color: var(--border); color: var(--text); }
.btn-block { width: 100%; }
.btn-sm { padding: 8px 14px; font-size: .85rem; }
.btn-lg { padding: 15px 30px; font-size: 1.05rem; }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none; }

/* --- Cards / panels ----------------------------------------------------- */
.card {
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0)) , var(--panel);
    border: 1px solid var(--border); border-radius: var(--radius);
    padding: 22px; box-shadow: var(--shadow);
}
.card-2 { background: var(--panel-2); }
.card-tight { padding: 16px; }
.card-hover { transition: transform .15s ease, border-color .2s ease, box-shadow .2s; }
.card-hover:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow-glow); }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); }
.divider { height: 1px; background: var(--border); border: 0; margin: 20px 0; }

/* --- Stat / KPI cards --------------------------------------------------- */
.stat { padding: 20px; border-radius: var(--radius); background: var(--panel-2); border: 1px solid var(--border); }
.stat .label { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-2); font-weight: 700; }
.stat .value { font-size: 1.7rem; font-weight: 800; margin: 6px 0 2px; }
.stat .value.cyan { color: var(--cyan); }
.stat .sub { font-size: .8rem; color: var(--muted-2); }

/* --- Badges / pills ----------------------------------------------------- */
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 700;
    padding: 4px 10px; border-radius: 999px; letter-spacing: .04em; text-transform: uppercase; }
.badge-cyan { background: rgba(34,211,238,.12); color: var(--cyan); border: 1px solid rgba(34,211,238,.25); }
.badge-green { background: rgba(34,197,94,.12); color: #4ade80; border: 1px solid rgba(34,197,94,.25); }
.badge-amber { background: rgba(245,181,68,.12); color: var(--amber); border: 1px solid rgba(245,181,68,.25); }
.badge-red { background: rgba(242,109,109,.12); color: var(--red); border: 1px solid rgba(242,109,109,.25); }
.badge-purple { background: rgba(139,123,255,.14); color: #b3a8ff; border: 1px solid rgba(139,123,255,.3); }
.badge-muted { background: rgba(255,255,255,.05); color: var(--muted); border: 1px solid var(--border); }

/* --- Forms -------------------------------------------------------------- */
label { display: block; font-size: .82rem; font-weight: 600; color: var(--muted); margin-bottom: 7px; }
.input, input[type=text], input[type=email], input[type=password], input[type=number],
input[type=tel], input[type=date], select, textarea {
    width: 100%; padding: 12px 14px; border-radius: var(--radius-sm);
    background: var(--bg-2); border: 1px solid var(--border-strong); color: var(--text);
    font-family: inherit; font-size: .95rem; outline: none; transition: border-color .15s, box-shadow .15s;
}
.input:focus, input:focus, select:focus, textarea:focus {
    border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(34,211,238,.15);
}
textarea { resize: vertical; min-height: 110px; }
.field { margin-bottom: 16px; }
.help { font-size: .78rem; color: var(--muted-2); margin-top: 6px; }
.error-text { color: var(--red); font-size: .8rem; margin-top: 6px; }
input[type=range] { -webkit-appearance: none; height: 6px; border-radius: 999px; background: var(--panel-3); padding: 0; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%;
    background: var(--cyan); cursor: pointer; box-shadow: 0 0 0 4px rgba(34,211,238,.2); }

/* --- Tables ------------------------------------------------------------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table.data { width: 100%; border-collapse: collapse; font-size: .9rem; min-width: 560px; }
table.data th { text-align: left; padding: 13px 16px; font-size: 11px; letter-spacing: .08em;
    text-transform: uppercase; color: var(--muted-2); background: var(--panel-2); font-weight: 700; }
table.data td { padding: 13px 16px; border-top: 1px solid var(--border); color: var(--text); }
table.data tr:hover td { background: rgba(255,255,255,.02); }

/* --- Tabs --------------------------------------------------------------- */
.tabs { display: flex; gap: 4px; flex-wrap: wrap; border-bottom: 1px solid var(--border); }
.tabs a, .tabs button { padding: 12px 16px; color: var(--muted); font-weight: 600; font-size: .92rem;
    border-bottom: 2px solid transparent; background: none; border-top: 0; border-left: 0; border-right: 0;
    cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.tabs a.active, .tabs button.active { color: var(--cyan); border-bottom-color: var(--cyan); }
.pill-tabs { display: inline-flex; gap: 4px; background: var(--panel-2); border: 1px solid var(--border);
    border-radius: 999px; padding: 4px; }
.pill-tabs a, .pill-tabs button { padding: 8px 16px; border-radius: 999px; color: var(--muted);
    font-weight: 600; font-size: .85rem; border: 0; background: none; cursor: pointer; }
.pill-tabs a.active, .pill-tabs button.active { background: var(--cyan); color: #04121a; }

/* --- Alerts ------------------------------------------------------------- */
.alert { padding: 13px 16px; border-radius: var(--radius-sm); font-size: .9rem; margin-bottom: 16px;
    border: 1px solid var(--border); }
.alert-success { background: rgba(34,197,94,.1); border-color: rgba(34,197,94,.3); color: #86efac; }
.alert-error { background: rgba(242,109,109,.1); border-color: rgba(242,109,109,.3); color: #fca5a5; }
.alert-warning { background: rgba(245,181,68,.1); border-color: rgba(245,181,68,.3); color: #fcd34d; }
.alert-info { background: rgba(34,211,238,.08); border-color: rgba(34,211,238,.25); color: #a5e9f5; }

/* --- Announcement bar --------------------------------------------------- */
.announce { background: linear-gradient(90deg, rgba(34,211,238,.14), rgba(56,214,107,.12));
    border-bottom: 1px solid var(--border); font-size: .85rem; }
.announce .container { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 9px 20px; }
.announce a { color: var(--cyan); font-weight: 700; }
.announce .x { margin-left: auto; color: var(--muted-2); cursor: pointer; background: none; border: 0; font-size: 1rem; }

/* --- Public header ------------------------------------------------------ */
.site-header { position: sticky; top: 0; z-index: 40; backdrop-filter: blur(12px);
    background: rgba(6,9,17,.75); border-bottom: 1px solid var(--border); }
.site-header .bar { display: flex; align-items: center; gap: 22px; padding: 14px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.02em; font-size: 1.15rem; }
.brand .logo-mark { width: 30px; height: 30px; border-radius: 8px; background: var(--grad-cyan);
    display: grid; place-items: center; color: #04121a; font-weight: 900; transform: rotate(45deg); }
.brand .logo-mark span { transform: rotate(-45deg); font-size: .8rem; }
.nav-links { display: flex; align-items: center; gap: 22px; margin-left: 12px; }
.nav-links a { color: var(--muted); font-weight: 600; font-size: .92rem; }
.nav-links a:hover { color: var(--text); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.btc-ticker { font-size: .82rem; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.btc-ticker b { color: var(--amber); }
.hamburger { display: none; background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
    width: 42px; height: 42px; border-radius: 999px; cursor: pointer; font-size: 1.1rem; }

/* --- Footer ------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-2); padding: 56px 0 30px; margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 30px; }
.footer-col h5 { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 14px; }
.footer-col a { display: block; color: var(--muted); font-size: .9rem; padding: 5px 0; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--border);
    color: var(--muted-2); font-size: .85rem; }

/* --- Hero --------------------------------------------------------------- */
.hero { position: relative; padding: 70px 0 50px; text-align: center; overflow: hidden; }
.hero .lead { margin: 18px auto 26px; }
.logo-hero { font-size: clamp(2.6rem, 8vw, 6rem); font-weight: 900; letter-spacing: -0.04em;
    background: linear-gradient(180deg, #cfefff, #35b4d6 60%, #0e6f86); -webkit-background-clip: text;
    background-clip: text; color: transparent; text-shadow: 0 20px 60px rgba(34,211,238,.25); }

/* --- Feature chips ------------------------------------------------------ */
.chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 9px 15px; border-radius: 999px;
    background: var(--panel-2); border: 1px solid var(--border); font-size: .85rem; color: var(--muted); font-weight: 600; }
.chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }

/* --- Stats band --------------------------------------------------------- */
.stats-band { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: var(--border);
    border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.stats-band .cell { background: var(--panel); padding: 22px 16px; text-align: center; }
.stats-band .cell .n { font-size: 1.5rem; font-weight: 800; color: var(--text); }
.stats-band .cell .k { font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted-2); margin-top: 4px; }

/* --- Portal shell ------------------------------------------------------- */
.portal { min-height: 100vh; }
.portal-topbar { position: sticky; top: 0; z-index: 30; background: rgba(6,9,17,.85); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border); }
.portal-topbar .bar { display: flex; align-items: center; gap: 16px; padding: 12px 0; }
.avatar { width: 38px; height: 38px; border-radius: 50%; background: var(--grad-cyan); color: #04121a;
    display: grid; place-items: center; font-weight: 800; }
.wallet-chip { display: inline-flex; flex-direction: column; align-items: flex-end; font-size: .72rem; color: var(--muted-2); }
.wallet-chip b { color: var(--text); font-size: .95rem; }
.section-tabs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 2px; }
.section-tabs a { padding: 10px 4px; margin-right: 14px; color: var(--muted); font-weight: 600; font-size: .95rem;
    border-bottom: 2px solid transparent; white-space: nowrap; display: inline-flex; gap: 8px; align-items: center; }
.section-tabs a.active { color: var(--cyan); border-bottom-color: var(--cyan); }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin: 22px 0; }
.page-head h1 { font-size: 2rem; margin: 0; }
.page-head .sub { color: var(--muted); }
.breadcrumb { font-size: .8rem; color: var(--muted-2); margin: 14px 0 4px; }
.breadcrumb a { color: var(--muted); }

/* Bottom mobile nav (portal) */
.bottom-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
    background: rgba(10,15,28,.96); border-top: 1px solid var(--border); }
.bottom-nav .row { display: flex; }
.bottom-nav a { flex: 1; text-align: center; padding: 10px 4px; color: var(--muted-2); font-size: 10px; font-weight: 600; }
.bottom-nav a.active { color: var(--cyan); }
.bottom-nav a .ic { display: block; font-size: 1.1rem; margin-bottom: 2px; }

/* --- Admin shell -------------------------------------------------------- */
.admin { display: grid; grid-template-columns: 250px 1fr; min-height: 100vh; }
.admin-side { background: var(--bg-2); border-right: 1px solid var(--border); padding: 18px 12px; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.admin-side .brand { padding: 8px 12px 18px; }
.admin-nav a { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 10px;
    color: var(--muted); font-weight: 600; font-size: .9rem; margin-bottom: 2px; }
.admin-nav a:hover { background: var(--panel); color: var(--text); }
.admin-nav a.active { background: rgba(34,211,238,.12); color: var(--cyan); }
.admin-nav .group { font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-2);
    padding: 16px 12px 6px; }
.admin-main { padding: 26px 30px; overflow-x: hidden; }

/* --- Modal -------------------------------------------------------------- */
.modal-overlay { position: fixed; inset: 0; background: rgba(3,6,12,.72); backdrop-filter: blur(4px);
    z-index: 60; display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; overflow-y: auto; }
.modal { width: 100%; max-width: 760px; background: var(--panel); border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.modal-body { padding: 24px; }
.modal .x { background: var(--panel-2); border: 1px solid var(--border); color: var(--muted); width: 34px; height: 34px;
    border-radius: 10px; cursor: pointer; font-size: 1.1rem; }

/* --- Wizard steps ------------------------------------------------------- */
.steps { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.steps .step { display: flex; align-items: center; gap: 8px; color: var(--muted-2); font-size: .85rem; font-weight: 600; }
.steps .step .n { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
    background: var(--panel-2); border: 1px solid var(--border); font-size: .8rem; }
.steps .step.active { color: var(--cyan); }
.steps .step.active .n { background: var(--cyan); color: #04121a; border-color: var(--cyan); }
.steps .sep { flex: 1; height: 1px; background: var(--border); min-width: 16px; }

/* --- Misc --------------------------------------------------------------- */
.empty-state { text-align: center; padding: 46px 20px; color: var(--muted); }
.empty-state .ic { font-size: 2rem; margin-bottom: 10px; opacity: .6; }
.list-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 16px;
    border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); margin-bottom: 12px; }
.list-row .ic { width: 40px; height: 40px; border-radius: 10px; background: var(--panel-3); display: grid;
    place-items: center; color: var(--cyan); }
.mono { font-variant-numeric: tabular-nums; }
.text-cyan { color: var(--cyan); } .text-green { color: #4ade80; } .text-red { color: var(--red); }
.text-amber { color: var(--amber); } .text-muted { color: var(--muted); }
.fw-700 { font-weight: 700; } .fw-800 { font-weight: 800; }
.hero-widget { max-width: 520px; margin: 0 auto; text-align: left; }

/* --- Responsive --------------------------------------------------------- */
@media (max-width: 980px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-band { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: 1fr 1fr; }
    .admin { grid-template-columns: 1fr; }
    .admin-side { display: none; }
}
@media (max-width: 720px) {
    .nav-links { display: none; }
    .hamburger { display: inline-grid; place-items: center; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .stats-band { grid-template-columns: 1fr 1fr; }
    .section { padding: 48px 0; }
    .bottom-nav { display: block; }
    .portal-body { padding-bottom: 80px; }
    .page-head h1 { font-size: 1.6rem; }
}