:root {
    --ak-blue: #142a59;
    --ak-yellow: #fca311;
    --bg-dark: #070d1a;
    --card-bg: #0e1931;
    --card-hover: #162645;
    --text-main: #f1f5f9;
    --text-muted: #8b9bb4;
    --border-color: rgba(255, 255, 255, 0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Pretendard', sans-serif; }

body { 
    background-color: var(--bg-dark); 
    color: var(--text-main); 
    display: flex; 
    flex-direction: column; 
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(20, 42, 89, 0.3), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(20, 42, 89, 0.3), transparent 25%);
}

header { 
    padding: 25px 50px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    border-bottom: 1px solid var(--border-color);
    background: rgba(7, 13, 26, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.logo-title { display: flex; align-items: center; gap: 20px; }
.logo-img { height: 28px; filter: brightness(0) invert(1); opacity: 0.95;} 

.title-group { display: flex; flex-direction: column; }
.title-group h1 { font-size: 20px; font-weight: 700; letter-spacing: 1.5px; color: #fff; }
.title-group span { font-size: 11px; color: var(--ak-yellow); font-weight: 600; letter-spacing: 3px; margin-top: 2px;}

.clock-container { display: flex; gap: 35px; }
.clock { display: flex; flex-direction: column; align-items: flex-end; }
.clock-label { font-size: 10px; color: var(--text-muted); font-weight: 600; letter-spacing: 1.5px; margin-bottom: 4px; }
.clock-time { font-size: 22px; font-weight: 800; font-family: monospace; letter-spacing: 2px; color: #fff;}
.clock-time.zulu { color: var(--ak-yellow); }

main { flex: 1; padding: 60px 50px; max-width: 1400px; margin: 0 auto; width: 100%; }

.section-header { margin-bottom: 40px; }
.section-header h2 { font-size: 26px; font-weight: 300; letter-spacing: -0.5px; color: rgba(255,255,255,0.9); }
.section-header strong { font-weight: 700; color: #fff;}

.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); gap: 25px; }

.card { 
    background: var(--card-bg); 
    border-radius: 12px; 
    text-decoration: none; 
    color: inherit; 
    border: 1px solid var(--border-color); 
    display: flex; 
    flex-direction: column;
    padding: 35px 30px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.card::before {
    content: attr(data-num);
    position: absolute;
    top: -15px;
    right: 15px;
    font-size: 130px;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.015);
    z-index: 0;
    pointer-events: none;
    transition: color 0.3s, transform 0.3s;
    line-height: 1;
}

.card:hover { 
    transform: translateY(-5px); 
    background: var(--card-hover);
    border-color: rgba(252, 163, 17, 0.3);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.card:hover::before { color: rgba(252, 163, 17, 0.04); transform: scale(1.05); }

.card-content { position: relative; z-index: 1; display: flex; flex-direction: column; height: 100%; }

.card-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 25px;}
.card-icon { width: 28px; height: 28px; color: var(--ak-yellow); }

/* 🌟 제목과 본문 사이 간격 확대 (15px -> 25px) */
.card-title { font-size: 20px; font-weight: 700; color: #fff; margin-top: 15px; margin-bottom: 25px; letter-spacing: -0.5px;}

.tag-group { display: flex; gap: 6px; flex-wrap: wrap;}
.tag { 
    font-size: 10px; 
    font-weight: 600; 
    padding: 4px 8px; 
    border-radius: 4px; 
    background: rgba(255,255,255,0.05); 
    color: var(--text-muted);
    border: 1px solid rgba(255,255,255,0.1);
    letter-spacing: 0.5px;
}

/* 🌟 리스트 항목 간의 간격 확대 (12px -> 16px) */
.feature-list { list-style: none; flex: 1; display: flex; flex-direction: column; gap: 16px; margin-bottom: 35px; }
.feature-list li { 
    font-size: 14px; 
    color: #bac5d6; 
    line-height: 1.5; 
    padding-left: 15px; 
    position: relative; 
    letter-spacing: -0.3px;
}
.feature-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 1.5px;
    background-color: var(--ak-yellow);
    opacity: 0.8;
}

.card-footer { 
    display: flex; 
    align-items: center; 
    gap: 8px;
    font-size: 13px; 
    font-weight: 600; 
    color: var(--ak-yellow); 
    opacity: 0.6;
    transition: opacity 0.2s, gap 0.2s;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 15px;
    margin-top: auto;
}
.card:hover .card-footer { opacity: 1; gap: 12px; border-color: rgba(252, 163, 17, 0.2); }

footer { text-align: center; padding: 25px; color: rgba(255,255,255,0.2); font-size: 11px; border-top: 1px solid var(--border-color); letter-spacing: 0.5px;}