:root {
    color-scheme: dark;
    --bg-0: #071017;
    --bg-1: #0a141d;
    --bg-2: #0e1b25;
    --panel: rgba(12, 25, 34, 0.92);
    --panel-strong: #0d1b25;
    --line: #213542;
    --line-soft: rgba(105, 143, 164, 0.17);
    --text: #d6e0e5;
    --muted: #8295a1;
    --accent: #79aebe;
    --accent-strong: #9dc4cf;
    --ok: #7fb69f;
    --error: #c98d8d;
    --shadow: rgba(0, 0, 0, 0.38);
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    background: var(--bg-0);
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    background:
        radial-gradient(circle at 20% 10%, rgba(56, 99, 120, 0.20), transparent 32rem),
        radial-gradient(circle at 90% 85%, rgba(45, 78, 91, 0.16), transparent 30rem),
        linear-gradient(145deg, var(--bg-0), var(--bg-1) 52%, #081219);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
    line-height: 1.55;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(var(--line-soft) 1px, transparent 1px),
        linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,.6), transparent 82%);
}

button,
input {
    font: inherit;
}

.app-header {
    position: fixed;
    z-index: 20;
    top: 0;
    left: 0;
    width: 100%;
    height: 74px;
    border-bottom: 1px solid rgba(105, 143, 164, .09);
    background:
        linear-gradient(180deg, rgba(5, 14, 20, .92), rgba(7, 16, 23, .76) 68%, rgba(7, 16, 23, .34));
    backdrop-filter: blur(12px);
}

.app-header::after {
    content: "";
    position: absolute;
    right: 24px;
    bottom: 10px;
    left: 24px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--line) 16%, var(--line) 84%, transparent);
    opacity: .68;
    pointer-events: none;
}

.app-header__inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: stretch;
    justify-content: center;
    width: 100%;
    height: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
}

.app-header__inner::-webkit-scrollbar {
    display: none;
}

.main-nav {
    display: flex;
    flex: 0 0 auto;
    align-items: stretch;
    justify-content: center;
    gap: clamp(2px, .7vw, 10px);
    min-width: max-content;
    height: 100%;
    padding: 0 12px;
}

.main-nav__item {
    position: relative;
    min-width: 0;
    padding: 0 clamp(10px, 1.15vw, 18px) 11px;
    border: 0;
    outline: 0;
    color: #8fa1ab;
    background: transparent;
    cursor: pointer;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: .08em;
    text-transform: uppercase;
    white-space: nowrap;
    transition:
        color .14s ease,
        background .14s ease,
        text-shadow .14s ease,
        transform .08s ease;
}

.main-nav__item::before,
.main-nav__item::after {
    content: "";
    position: absolute;
    right: 12px;
    left: 12px;
    height: 1px;
    opacity: 0;
    transform: scaleX(.72);
    transition: opacity .14s ease, transform .14s ease, background .14s ease;
    pointer-events: none;
}

.main-nav__item::before {
    top: 15px;
    background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.main-nav__item::after {
    bottom: 10px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.main-nav__item:hover {
    color: var(--accent-strong);
    background: linear-gradient(180deg, transparent 18%, rgba(121, 174, 190, .045) 58%, transparent);
    text-shadow: 0 0 14px rgba(121, 174, 190, .24);
}

.main-nav__item:hover::before,
.main-nav__item:hover::after,
.main-nav__item--current::after {
    opacity: 1;
    transform: scaleX(1);
}

.main-nav__item--current {
    color: var(--accent-strong);
    text-shadow: 0 0 16px rgba(121, 174, 190, .22);
}

.main-nav__item--current::after {
    height: 2px;
    box-shadow: 0 0 12px rgba(121, 174, 190, .24);
}

.main-nav__item:active {
    color: #eef7f9;
    transform: translateY(1px) scale(.985);
    background: rgba(121, 174, 190, .075);
}

.main-nav__item:focus-visible {
    color: #eef7f9;
    box-shadow: inset 0 0 0 1px rgba(157, 196, 207, .62);
}

.viewport {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 28px;
}

.viewport--home {
    padding-top: 102px;
}

.terminal {
    width: min(100%, 660px);
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: linear-gradient(180deg, rgba(17, 34, 45, 0.96), var(--panel));
    box-shadow: 0 28px 80px var(--shadow), inset 0 1px rgba(255, 255, 255, 0.025);
}

.terminal__bar,
.terminal__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 13px 18px;
    color: var(--muted);
    background: rgba(5, 14, 20, 0.42);
}

.terminal__bar {
    border-bottom: 1px solid var(--line);
}

.terminal__footer {
    border-top: 1px solid var(--line);
    font-size: 11px;
    letter-spacing: .06em;
}

.brand {
    color: #a9bac3;
    font-weight: 700;
    letter-spacing: .14em;
}

.brand__mark {
    color: var(--accent-strong);
}

.terminal__state {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    letter-spacing: .08em;
}

.dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 14px rgba(121, 174, 190, .55);
}

.terminal__state--ok {
    color: var(--ok);
}

.terminal__state--ok .dot {
    background: var(--ok);
    box-shadow: 0 0 14px rgba(127, 182, 159, .5);
}

.terminal__body {
    padding: clamp(28px, 6vw, 52px);
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--accent);
    font-size: 12px;
    letter-spacing: .08em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    color: #edf3f5;
    font-size: clamp(24px, 4.6vw, 32px);
    line-height: 1.12;
    letter-spacing: -.04em;
}

.lead {
    max-width: 52ch;
    margin: 14px 0 0;
    color: var(--muted);
}

.form {
    display: grid;
    gap: 22px;
    margin-top: 34px;
}

.field {
    display: grid;
    gap: 8px;
}

.field__label {
    color: var(--muted);
    font-size: 11px;
    letter-spacing: .12em;
}

.field__control {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 0 14px;
    border: 1px solid #29404e;
    border-radius: 6px;
    background: rgba(3, 11, 16, .42);
    transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}

.field__control:focus-within {
    border-color: #527b8b;
    background: rgba(5, 15, 21, .72);
    box-shadow: 0 0 0 3px rgba(91, 137, 154, .10);
}

.prompt {
    color: var(--accent);
    user-select: none;
}

.field input {
    width: 100%;
    min-width: 0;
    padding: 11px 0;
    border: 0;
    outline: 0;
    color: var(--text);
    background: transparent;
    caret-color: var(--accent-strong);
}

.field input::selection {
    color: #071017;
    background: var(--accent-strong);
}

.button {
    width: max-content;
    min-width: 142px;
    min-height: 44px;
    padding: 0 18px;
    border: 1px solid #547787;
    border-radius: 5px;
    color: #dce8ec;
    background: linear-gradient(180deg, rgba(78, 116, 132, .22), rgba(40, 69, 82, .20));
    cursor: pointer;
    letter-spacing: .08em;
    transition: transform .12s ease, border-color .12s ease, background .12s ease;
}

.button:hover {
    border-color: var(--accent);
    background: linear-gradient(180deg, rgba(96, 141, 159, .28), rgba(45, 76, 90, .24));
}

.button:active {
    transform: translateY(1px);
}

.button:focus-visible {
    outline: 2px solid var(--accent-strong);
    outline-offset: 3px;
}

.button span {
    color: var(--accent);
}

.button--ghost {
    margin-top: 6px;
    border-color: #364e5b;
    background: transparent;
}

.alert {
    display: flex;
    gap: 12px;
    margin-top: 26px;
    padding: 12px 14px;
    border: 1px solid rgba(201, 141, 141, .38);
    border-radius: 5px;
    color: #d7b5b5;
    background: rgba(111, 48, 48, .10);
}

.alert span {
    color: var(--error);
    font-weight: 700;
}

.home-panel {
    width: min(100%, 820px);
}

.home-body {
    display: grid;
    gap: 34px;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--line);
}

.status-grid > div {
    min-width: 0;
    padding: 16px;
    background: rgba(7, 17, 23, .72);
}

.status-grid dt {
    margin-bottom: 7px;
    color: var(--muted);
    font-size: 10px;
    letter-spacing: .12em;
}

.status-grid dd {
    margin: 0;
    overflow: hidden;
    color: #d9e6e9;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cursor {
    color: var(--accent);
    animation: blink 1.1s steps(1, end) infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        transition: none !important;
        animation: none !important;
    }
}

@media (max-width: 860px) {
    .app-header__inner {
        justify-content: flex-start;
    }

    .main-nav {
        padding-inline: 10px;
    }

    .main-nav__item {
        padding-inline: 12px;
    }
}

@media (max-width: 680px) {
    .app-header {
        height: 64px;
    }

    .app-header::after {
        right: 12px;
        bottom: 8px;
        left: 12px;
    }

    .main-nav__item {
        padding-bottom: 9px;
        font-size: 11px;
        letter-spacing: .065em;
    }

    .main-nav__item::before {
        top: 12px;
    }

    .main-nav__item::after {
        bottom: 8px;
    }

    .viewport {
        padding: 14px;
    }

    .viewport--home {
        padding-top: 86px;
    }

    .terminal__bar,
    .terminal__footer {
        align-items: flex-start;
        flex-direction: column;
        gap: 7px;
    }

    .terminal__footer {
        display: none;
    }

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