:root {
    --ink: #050b16;
    --panel: rgba(10, 28, 50, .88);
    --panel-strong: rgba(10, 38, 67, .94);
    --line: rgba(70, 225, 255, .24);
    --cyan: #43e8ff;
    --blue: #2773ff;
    --text: #eef9ff;
    --muted: #a3bbd0;
    --green: #44e58c;
    --danger: #ff6b78;
    --shadow: 0 18px 60px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

body {
    min-height: 100vh;
    margin: 0;
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at 70% 15%, rgba(39, 115, 255, .18), transparent 27rem),
        radial-gradient(circle at 20% 75%, rgba(67, 232, 255, .11), transparent 30rem),
        var(--ink);
}

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

.app-shell {
    width: min(1220px, calc(100% - 2rem));
    margin: 0 auto;
}

.topbar {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px solid var(--line);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: .75rem;
    font-size: 1.15rem;
    letter-spacing: .04em;
}

.brand strong { color: var(--cyan); }

.brand-orb {
    width: 1.15rem;
    height: 1.15rem;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 20px var(--cyan);
}

.user-box {
    display: flex;
    align-items: center;
    gap: .9rem;
}

.user-box small {
    display: block;
    margin-top: .2rem;
    color: var(--cyan);
    font-size: .68rem;
    letter-spacing: .14em;
}

.page-content {
    padding: 3rem 0 4rem;
}

.eyebrow {
    color: var(--cyan);
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .18em;
}

h1, h2, p { margin-top: 0; }

h1 {
    margin-bottom: 1rem;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.05;
}

h1 span { color: var(--cyan); }

h2 {
    margin-bottom: .35rem;
    font-size: 1.3rem;
}

.muted {
    color: var(--muted);
    line-height: 1.7;
}

.btn {
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 800;
    padding: .75rem 1rem;
    transition: transform .18s ease, box-shadow .18s ease;
}

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

.btn-primary {
    color: #00131f;
    background: var(--cyan);
    box-shadow: 0 0 22px rgba(67, 232, 255, .28);
}

.btn-outline {
    color: var(--text);
    border: 1px solid var(--line);
    background: transparent;
}

.btn-wide {
    width: 100%;
    padding: .95rem 1rem;
}

.login-wrap {
    min-height: 84vh;
    display: grid;
    grid-template-columns: minmax(300px, 1fr) minmax(320px, 1fr);
    gap: 3rem;
    align-items: center;
}

.login-panel {
    width: min(100%, 480px);
    padding: 2.2rem;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.login-form {
    display: grid;
    gap: 1rem;
    margin-top: 2rem;
}

.login-form label {
    display: grid;
    gap: .5rem;
    color: #d6edf8;
    font-size: .88rem;
    font-weight: 700;
}

.login-form input[type="email"],
.login-form input[type="password"] {
    width: 100%;
    border: 1px solid rgba(132, 196, 225, .25);
    border-radius: 10px;
    outline: none;
    padding: .85rem .9rem;
    color: var(--text);
    background: rgba(0, 10, 24, .7);
}

.login-form input:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px rgba(67, 232, 255, .12);
}

.checkbox-row {
    display: flex !important;
    align-items: center;
    gap: .55rem;
    color: var(--muted) !important;
}

.alert {
    padding: .8rem .9rem;
    border-radius: 10px;
}

.alert-error {
    color: #fff;
    border: 1px solid rgba(255, 107, 120, .5);
    background: rgba(255, 107, 120, .15);
}

.login-visual {
    position: relative;
    min-height: 430px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 28px;
    background:
        radial-gradient(circle at center, rgba(39, 115, 255, .24), transparent 35%),
        var(--panel-strong);
    box-shadow: var(--shadow);
}

.core-node {
    position: absolute;
    inset: 0;
    width: 118px;
    height: 118px;
    margin: auto;
    display: grid;
    place-items: center;
    border: 1px solid var(--cyan);
    border-radius: 50%;
    color: var(--cyan);
    font-size: 2.3rem;
    font-weight: 900;
    box-shadow: 0 0 38px rgba(67, 232, 255, .55);
}

.pulse-ring {
    position: absolute;
    inset: 0;
    margin: auto;
    border: 1px solid rgba(67, 232, 255, .32);
    border-radius: 50%;
}

.ring-a {
    width: 220px;
    height: 220px;
    animation: spin 20s linear infinite;
}

.ring-b {
    width: 330px;
    height: 330px;
    border-style: dashed;
    animation: spin 28s linear infinite reverse;
}

.ring-c {
    width: 430px;
    height: 430px;
    border-color: rgba(39, 115, 255, .33);
    animation: spin 38s linear infinite;
}

.orbit-tag {
    position: absolute;
    padding: .55rem .7rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: #d4f6ff;
    font-size: .78rem;
    background: rgba(2, 17, 35, .78);
}

.tag-top { top: 18%; left: 43%; }
.tag-left { top: 51%; left: 10%; }
.tag-right { top: 50%; right: 9%; }
.tag-bottom { bottom: 18%; left: 41%; }

.dashboard-hero {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.system-status {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    flex-shrink: 0;
    padding: .75rem .9rem;
    border: 1px solid rgba(68, 229, 140, .3);
    border-radius: 999px;
    color: #d6ffe8;
    background: rgba(68, 229, 140, .08);
}

.status-dot {
    width: .62rem;
    height: .62rem;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 14px var(--green);
}

.metric-grid,
.panel-grid {
    display: grid;
    gap: 1rem;
}

.metric-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-bottom: 1rem;
}

.metric-card,
.panel {
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.metric-card { padding: 1.25rem; }

.metric-label {
    display: block;
    margin-bottom: .55rem;
    color: var(--muted);
    font-size: .78rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.metric-card strong {
    display: block;
    color: var(--cyan);
    font-size: 1.45rem;
}

.metric-card small {
    display: block;
    margin-top: .5rem;
    color: var(--muted);
}

.panel-grid {
    grid-template-columns: 1.1fr .9fr;
}

.panel { padding: 1.45rem; }

.panel-heading {
    margin-bottom: 1.1rem;
}

.flow-list {
    display: grid;
    gap: .8rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.flow-list li {
    display: flex;
    align-items: center;
    gap: .8rem;
    color: #d3e8f8;
}

.flow-list span {
    display: inline-grid;
    place-items: center;
    width: 2rem;
    height: 2rem;
    flex: 0 0 2rem;
    border-radius: 50%;
    color: #00131f;
    font-size: .72rem;
    font-weight: 900;
    background: var(--cyan);
}

.activity-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: .7rem;
    align-items: start;
    padding: .85rem 0;
    border-top: 1px solid rgba(132, 196, 225, .14);
}

.activity-icon { color: var(--cyan); }

.activity-row p {
    margin: .3rem 0 0;
    color: var(--muted);
    font-size: .86rem;
}

.activity-row small {
    color: var(--muted);
    white-space: nowrap;
    font-size: .75rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 860px) {
    .login-wrap,
    .panel-grid {
        grid-template-columns: 1fr;
    }

    .login-visual { min-height: 340px; }

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

@media (max-width: 560px) {
    .topbar,
    .dashboard-hero {
        align-items: flex-start;
        flex-direction: column;
    }

    .user-box {
        width: 100%;
        justify-content: space-between;
    }

    .metric-grid {
        grid-template-columns: 1fr;
    }

    .login-panel {
        padding: 1.35rem;
    }

    .ring-c {
        width: 340px;
        height: 340px;
    }
}