:root {
    --primary-color: #337cf4;
    --primary-hover: #2864c6;
    --bg-color: #f0f4f8;
    --text-color: #333333;
    --gray-border: #e1e5e9;
    --gray-text: #888888;
    --input-bg: #ffffff;
    --disabled-bg: #d1d5db;
    --disabled-text: #9ca3af;
    --success-color: #28a745;
    --error-color: #dc3545;
    --warn-color: #ffc107;
}

html, body {
    width: 100%;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    font-family: 'Pretendard', 'Malgun Gothic', sans-serif;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-color);
    overflow-x: hidden;
}

.kb-signup-container {
    width: 100%;
    max-width: 600px;
    padding: 60px 20px;
    margin: auto;
    box-sizing: border-box;
}

.kb-signup-card {
    background-color: #ffffff;
    border-radius: 20px;
    padding: 50px 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.5);
    width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.kb-title-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.kb-title-container img { width: 60px; height: auto; margin-bottom: 5px; }
.kb-title-text { font-size: 28px; font-weight: 800; color: var(--text-color); margin: 0; }
.kb-signup-title {
    font-size: 16px; font-weight: 500; color: var(--gray-text);
    margin-bottom: 40px; text-align: center;
}

@media (max-width: 768px) {
    .kb-signup-container { padding: 20px 15px; }
    .kb-signup-card { padding: 30px 20px; }
}