/**
 * [Senior Standard] Common Design System v3.0
 * Theme: Simple & Pastel Casual
 * Focus: High Legibility, Soft Interaction, Responsive Consistency
 */

:root {
    /* Pastel Palette */
    --p-blue: #E0F2FE;
    --p-green: #DCFCE7;
    --p-pink: #FFF1F2;
    --p-orange: #FEF3C7;
    --p-purple: #F3E8FF;

    /* Brand Colors */
    --primary: #3B82F6;
    --text-main: #334155;
    --text-muted: #64748B;
    --bg-base: #F8FAFC;
    --border-soft: #F1F5F9;

    /* Radii & Shadows */
    --radius-lg: 20px;
    --radius-md: 12px;
    --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: 'Noto Sans KR', -apple-system, sans-serif;
    line-height: 1.6;
    margin: 0; padding: 0;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* Common Card UI */
.card-ui {
    background: #ffffff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: 30px;
    border: 1px solid var(--border-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-ui:hover { transform: translateY(-2px); }

/* Pastel Button System (Touch Friendly 44px+) */
.btn-pastel {
    border: none;
    border-radius: var(--radius-md);
    padding: 12px 24px;
    min-height: 44px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 15px;
    gap: 8px;
}

.btn-pastel:hover { filter: brightness(0.98); transform: scale(1.02); }
.btn-pastel:active { transform: scale(0.98); }

.btn-blue { background-color: var(--p-blue); color: #0369A1; }
.btn-green { background-color: var(--p-green); color: #15803D; }
.btn-pink { background-color: var(--p-pink); color: #BE123C; }

/* Global Layout Helpers */
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.full-width { width: 100%; }

/* Responsive Utility */
@media (max-width: 768px) {
    .container { padding: 15px; }
    .card-ui { padding: 20px; }
    .btn-pastel { width: 100%; } /* Touch Focus */
}