:root {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color-scheme: light dark;
    --page: #eef2f8;
    --card: rgba(255, 255, 255, 0.94);
    --text: #172033;
    --muted: #647089;
    --border: #d7deea;
    --accent: #2458d6;
    --accent-hover: #1948bd;
    --danger-bg: #fff0f0;
    --danger: #9d2020;
    --success-bg: #eaf8ef;
    --success: #176b37;
    --shadow: 0 24px 70px rgba(23, 32, 51, 0.15);
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 15% 15%, rgba(36, 88, 214, 0.16), transparent 34rem),
        radial-gradient(circle at 85% 80%, rgba(40, 160, 115, 0.12), transparent 32rem),
        var(--page);
    color: var(--text);
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 2rem 1rem;
}

.auth-card {
    width: min(100%, 29rem);
    padding: clamp(1.5rem, 5vw, 2.5rem);
    border: 1px solid rgba(255, 255, 255, 0.75);
    border-radius: 1.5rem;
    background: var(--card);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.wide-card {
    width: min(100%, 38rem);
}

.brand-mark {
    width: 3rem;
    height: 3rem;
    display: grid;
    place-items: center;
    margin-bottom: 1.25rem;
    border-radius: 0.9rem;
    background: var(--accent);
    color: white;
    font-size: 1.45rem;
    font-weight: 800;
}

.eyebrow {
    margin: 0 0 0.35rem;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: clamp(2rem, 7vw, 2.7rem);
    line-height: 1.08;
}

.lead {
    margin: 0.8rem 0 1.5rem;
    color: var(--muted);
    line-height: 1.55;
}

.auth-form {
    display: grid;
    gap: 0.75rem;
}

label {
    margin-top: 0.35rem;
    font-size: 0.92rem;
    font-weight: 700;
}

input {
    width: 100%;
    padding: 0.85rem 0.95rem;
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    background: rgba(255, 255, 255, 0.84);
    color: var(--text);
    font: inherit;
    outline: none;
    transition: border-color 120ms ease, box-shadow 120ms ease;
}

input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(36, 88, 214, 0.15);
}

button {
    width: 100%;
    margin-top: 0.65rem;
    padding: 0.9rem 1.1rem;
    border: 0;
    border-radius: 0.85rem;
    background: var(--accent);
    color: white;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    transition: transform 100ms ease, background 120ms ease;
}

button:hover {
    background: var(--accent-hover);
}

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

button:focus-visible,
input:focus-visible {
    outline: 3px solid rgba(36, 88, 214, 0.35);
    outline-offset: 2px;
}

.secondary-button {
    width: auto;
    min-width: 10rem;
}

.message {
    margin: 1rem 0;
    padding: 0.85rem 1rem;
    border-radius: 0.8rem;
    line-height: 1.45;
}

.message-error {
    background: var(--danger-bg);
    color: var(--danger);
}

.message-success {
    background: var(--success-bg);
    color: var(--success);
}

.security-note {
    margin: 1.25rem 0 0;
    color: var(--muted);
    font-size: 0.82rem;
    text-align: center;
}

.user-data {
    display: grid;
    gap: 0.7rem;
    margin: 1.5rem 0;
}

.user-data div {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border);
}

.user-data dt {
    color: var(--muted);
}

.user-data dd {
    margin: 0;
    font-weight: 750;
}

@media (prefers-color-scheme: dark) {
    :root {
        --page: #0f1420;
        --card: rgba(24, 31, 47, 0.94);
        --text: #edf2ff;
        --muted: #aeb8ce;
        --border: #3b465e;
        --accent: #77a1ff;
        --accent-hover: #95b6ff;
        --danger-bg: #3a1f25;
        --danger: #ffb3bd;
        --success-bg: #173426;
        --success: #9ce5b9;
        --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
    }

    input {
        background: rgba(15, 20, 32, 0.74);
    }

    button {
        color: #101725;
    }
}