:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --primary: #38bdf8;
    --text-main: #f8fafc;
    --text-sub: #94a3b8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    word-break: keep-all; /* 모바일에서 단어 단위 줄바꿈 설정 */
}

/* Navigation Bar */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 8%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.admin {
	color: var(--text-sub);
	text-decoration: none;
	font-size: 0.95rem;
}

.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.header-bar h1 { color: var(--primary); font-size: 1.8rem; }
.header-bar a { color: var(--primary); text-decoration: none; font-size: 1.2rem; }

/* Header / Hero Section */
header {
    text-align: center;
    padding: 60px 20px 30px;
    background: radial-gradient(circle at top, #1e293b 0%, #0f172a 100%);
}

header h1 {
    font-size: clamp(2rem, 5vw, 3rem); /* 화면 크기에 따른 가변 폰트 */
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(to right, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-sub);
    font-size: clamp(0.95rem, 2.5vw, 1.1rem);
    max-width: 600px;
    margin: 0 auto;
    padding: 0 10px;
}

/* Search & Controls Section */
.controls {
    max-width: 1200px;
    margin: 20px auto 30px;
    padding: 0 20px;
    display: flex;
    justify-content: center;
}

.search-box { position: relative; width: 100%; max-width: 480px; }

.search-box input {
    width: 100%;
    padding: 14px 20px 14px 45px;
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: var(--card-bg);
    color: #fff;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.3s ease;
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
}

.search-box i {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-sub);
}

/* Project Grid (반응형 그리드) */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 80px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

/* Card Component */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

@media (hover: hover) {
    .card:hover {
        transform: translateY(-8px);
        box-shadow: 0 20px 30px rgba(0, 0, 0, 0.4);
        border-color: rgba(56, 189, 248, 0.3);
    }
}

.card-img-wrapper {
    width: 100%;
    padding-top: 56.25%; /* 16:9 비율 유지 */
    position: relative;
    overflow: hidden;
}

.card-img {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    object-fit: cover;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #fff;
}

.card-desc {
    color: var(--text-sub);
    font-size: 0.9rem;
    margin-bottom: 16px;
    flex-grow: 1;
}

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }

.tag {
    background: rgba(56, 189, 248, 0.12);
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 600;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #38bdf8, #0284c7);
    color: #fff;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: opacity 0.2s;
}

.btn:active { opacity: 0.8; }

/* Footer */
footer {
    text-align: center;
    padding: 30px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-sub);
    font-size: 0.85rem;
}

/* Mobile Optimization */
@media (max-width: 600px) {
    nav { padding: 15px 20px; }
    header { padding: 40px 15px 20px; }
    .container {
        grid-template-columns: 1fr; /* 모바일에서는 1열 고정 */
        gap: 20px;
        padding-bottom: 50px;
    }
    .card-body { padding: 16px; }
}



/*	여기부터 admin.php 에서만 사용하는 css */

.admin-container { max-width: 1000px; margin: 0 auto; }

/* Form Styling */
.form-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 40px;
    border: 1px solid rgba(255,255,255,0.05);
}
.form-card h2 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #fff;
}

.form-group { margin-bottom: 15px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-sub);
    font-size: 0.9rem;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: #fff;
    outline: none;
}
.form-group input:focus, .form-group textarea:focus {
    border-color: var(--primary);
}

.btn-submit {
    background: var(--primary);
    color: #0f172a;
    font-weight: 700;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    margin-top: 10px;
}

.btn-cancel {
    display: inline-block;
    text-align: center;
    background: #475569;
    color: #fff;
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    width: 100%;
    margin-top: 8px;
}

/* Table Styling */
.table-responsive { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
}

th, td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
}

th { background: rgba(0, 0, 0, 0.2); color: var(--text-sub); }

.action-btns { display: flex; gap: 8px; }
.btn-edit { color: var(--primary); text-decoration: none; }
.btn-delete { color: var(--danger); text-decoration: none; }

.msg-box {
    padding: 12px;
    background: rgba(56, 189, 248, 0.15);
    color: var(--primary);
    border-radius: 6px;
    margin-bottom: 20px;
    text-align: center;
}