:root {
    --bg-1: #0b1023;
    --bg-2: #18223f;
    --panel: rgba(12, 18, 35, 0.74);
    --panel-border: rgba(255, 255, 255, 0.15);
    --text: #f8fafc;
    --muted: #bac6de;
    --accent: #5eead4;
    --accent-strong: #14b8a6;
    --btn-text: #07131f;
    --danger: #fb7185;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: "Avenir Next", "Futura", "Trebuchet MS", sans-serif;
    color: var(--text);
}

body {
    min-height: 100vh;
    background:
        radial-gradient(1200px 700px at 18% 10%, rgba(94, 234, 212, 0.2), transparent 50%),
        radial-gradient(1000px 650px at 82% 85%, rgba(251, 113, 133, 0.16), transparent 55%),
        linear-gradient(150deg, var(--bg-1), var(--bg-2));
}

.gate-shell,
.dashboard-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
}

.gate-card,
.dashboard-card {
    width: min(92vw, 520px);
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 22px;
    padding: 2.2rem 2rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

.site-title {
    margin: 0;
    font-size: clamp(2rem, 5vw, 2.6rem);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-align: center;
}

.site-subtitle {
    margin: 0.6rem 0 1.9rem;
    text-align: center;
    color: var(--muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.8rem;
}

.gate-form {
    display: grid;
    gap: 0.8rem;
}

label {
    font-size: 0.95rem;
    color: var(--muted);
}

input[type="text"] {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 12px;
    padding: 0.9rem 0.95rem;
    font-size: 1rem;
    color: var(--text);
    background: rgba(8, 13, 28, 0.55);
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

input[type="text"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(94, 234, 212, 0.2);
}

button,
.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
    border: 0;
    border-radius: 12px;
    padding: 0.82rem 1rem;
    font-size: 0.98rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: transform 120ms ease, filter 120ms ease;
}

button:hover,
.btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.04);
}

button:active,
.btn:active {
    transform: translateY(0);
}

.btn-primary,
.gate-form button {
    background: linear-gradient(125deg, var(--accent), var(--accent-strong));
    color: var(--btn-text);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.dashboard-actions {
    display: grid;
    gap: 0.8rem;
}

.dashboard-actions form {
    margin: 0;
}

.gate-error {
    margin: 0.25rem 0 0;
    min-height: 1.25rem;
    color: var(--danger);
    opacity: 0;
    transition: opacity 500ms ease;
}

.gate-error.is-visible {
    opacity: 1;
}

.gate-error.is-fading {
    opacity: 0;
}

@media (max-width: 560px) {
    .gate-card,
    .dashboard-card {
        padding: 1.8rem 1.3rem;
        border-radius: 16px;
    }

    .site-subtitle {
        margin-bottom: 1.5rem;
    }
}