:root {
    --color-primary: #8321cd;
    --color-primary-dark: #5e1e8e;
    --color-primary-light: #c07bf5;
    --color-heading: #344767;
    --color-text: #3a3648;
    --color-muted: #857f94;
    --color-bg-top: #f3ecfb;
    --color-bg-bottom: #f8f7fb;
    --color-surface: #ffffff;
    --color-border: #e8e1f2;
    --color-error-bg: #fdecea;
    --color-error-border: #f3c6c1;
    --color-error: #b3261e;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    color: var(--color-text);
    background: radial-gradient(circle at 50% 0%, var(--color-bg-top) 0%, var(--color-bg-bottom) 55%);
}

.login-shell {
    width: 100%;
    max-width: 26rem;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.brand {
    margin-bottom: 2.5rem;
}

.brand-logo {
    height: 4.75rem;
    width: auto;
}

.card {
    width: 100%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    padding: 2.5rem 2.25rem;
    box-shadow: 0 20px 45px -18px rgba(88, 30, 140, 0.28), 0 2px 6px rgba(88, 30, 140, 0.06);
}

.eyebrow {
    margin: 0 0 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-primary);
}

.card h1 {
    margin: 0 0 0.6rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-heading);
}

.subtext {
    margin: 0 0 1.75rem;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--color-muted);
}

.error {
    margin: 0 0 1.25rem;
    padding: 0.7rem 0.9rem;
    font-size: 0.85rem;
    line-height: 1.4;
    color: var(--color-error);
    background: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    border-radius: 0.5rem;
}

.login-form label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-heading);
}

.code-input {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: 0.6rem;
    font-size: 1.15rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text);
    background: var(--color-bg-bottom);
    margin-bottom: 1.5rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.code-input::placeholder {
    color: var(--color-muted);
    letter-spacing: 0.08em;
    opacity: 0.7;
}

.code-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(131, 33, 205, 0.15);
    background: var(--color-surface);
}

button {
    width: 100%;
    padding: 0.8rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    border: none;
    border-radius: 0.6rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 8px 18px -8px rgba(88, 30, 140, 0.55);
    transition: transform 0.1s ease, box-shadow 0.15s ease;
}

button:hover {
    box-shadow: 0 10px 22px -8px rgba(88, 30, 140, 0.65);
}

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