:root {
    --primary-color: #1a365d;
    --accent-color: #2b6cb0;
    --bg-color: #f7fafc;
    --card-bg: #ffffff;
    --text-main: #2d3748;
    --text-muted: #718096;
}

body {
    margin: 0;
    font-family: 'Pretendard', -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
}

.hidden { display: none !important; }

/* 레이아웃 */
.layout-flex {
    display: flex;
    height: 100vh;
}

.screen {
    width: 100%;
    height: 100vh;
}

/* 카드 및 폼 디자인 */
.card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.login-card {
    max-width: 400px;
    margin: 10% auto;
    text-align: center;
}

.master-card {
    max-width: 600px;
    margin: 5% auto;
}

input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 14px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.2s;
}

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

/* 대시보드 디자인 */
.sidebar {
    width: 250px;
    background-color: var(--primary-color);
    color: white;
    padding: 20px;
}

.company-badge {
    background: rgba(255,255,255,0.1);
    padding: 8px;
    border-radius: 4px;
    margin-bottom: 30px;
    font-size: 0.9em;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar li {
    padding: 12px;
    margin-bottom: 8px;
    border-radius: 6px;
    background: rgba(255,255,255,0.05);
    cursor: pointer;
}

.content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.content header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.content header button { width: auto; padding: 8px 16px; }

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.widget {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
    border: 1px solid #e2e8f0;
}

.api-inputs input { margin-bottom: 10px; }