:root {
    --bg-color: var(--ui-bg);
    --text-primary: var(--ui-text);
    --text-secondary: var(--ui-text-muted);
    --accent-color: var(--ui-accent);
    --input-bg: var(--ui-surface);
    --input-focus-bg: var(--ui-surface-solid);
    --border-color: var(--ui-border);
    --button-bg: var(--ui-accent);
    --button-hover: var(--ui-accent-strong);
}

body {
    font-family: var(--font-body);
    background:
        radial-gradient(900px at 15% 15%, var(--ui-ambient-1), transparent 60%),
        radial-gradient(760px at 85% 80%, var(--ui-ambient-2), transparent 62%),
        linear-gradient(160deg, var(--ui-bg-alt), var(--bg-color));
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
    position: relative;
}

.main-wrapper {
    width: 100%;
    max-width: 360px;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--ui-surface);
    border: 1px solid var(--border-color);
    border-radius: 22px;
    padding: 2.6rem 2.2rem;
    box-shadow: var(--ui-shadow);
    backdrop-filter: blur(16px);
}

.logo-area {
    margin-bottom: 2rem;
    text-align: center;
}

.logo-area h1 {
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: 4px;
    font-family: var(--font-display);
}

.logo-area p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

form {
    width: 100%;
}

.input-group {
    margin-bottom: 1.2rem;
    position: relative;
}

.input-group input {
    width: 100%;
    padding: 1rem;
    border: 1px solid transparent;
    border-bottom: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-primary);
    box-sizing: border-box;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
    text-align: center;
}

.input-group input:focus {
    background-color: var(--input-focus-bg);
    border-bottom-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    transform: translateY(-1px);
}

.action-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--button-bg), var(--button-hover));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 1rem;
    letter-spacing: 1px;
}

.action-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--button-hover), var(--button-bg));
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(47, 109, 246, 0.28);
}

.action-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#message-box {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    min-height: 1.2em;
    color: var(--accent-color);
}

.error { color: var(--ui-danger) !important; }
.success { color: var(--ui-success) !important; }

.secondary-actions {
    margin-top: 2rem;
    text-align: center;
}

.secondary-actions a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-decoration: none;
    cursor: pointer;
}
.secondary-actions a:hover {
    color: var(--accent-color);
}

.info-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 1rem;
    line-height: 1.5;
}