/* =========================
   RESET
========================= */

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

:root{

    --primary:#2563eb;
    --primary-dark:#1d4ed8;

    --secondary:#f8fafc;

    --text:#0f172a;
    --text-light:#64748b;

    --border:#e2e8f0;

    --shadow:
        0 10px 30px rgba(0,0,0,.08);

    --radius:18px;

    --container:1200px;
}

html{
    scroll-behavior:smooth;
}

body{

    font-family:
        "Pretendard",
        "Noto Sans KR",
        sans-serif;

    background:#f8fafc;

    color:var(--text);

    line-height:1.7;
}


/* =========================
   공통
========================= */

.container{

    width:100%;
    max-width:var(--container);

    margin:0 auto;

    padding:0 20px;
}

.section{
    padding:80px 0;
}

.section-title{

    font-size:2rem;

    font-weight:800;

    margin-bottom:30px;
}

a{
    text-decoration:none;
    color:inherit;
}

img{
    max-width:100%;
    display:block;
}


/* =========================
   HEADER
========================= */

header{

    position:sticky;

    top:0;

    z-index:1000;

    backdrop-filter:blur(20px);

    background:
        rgba(255,255,255,.85);

    border-bottom:
        1px solid rgba(226,232,240,.7);
}

.navbar{

    display:flex;

    justify-content:space-between;

    align-items:center;

    height:80px;
}

.logo{

    font-size:1.8rem;

    font-weight:900;

    color:var(--primary);

    letter-spacing:-1px;
}

nav ul{

    display:flex;

    gap:12px;

    list-style:none;
}

nav a{

    padding:10px 18px;

    border-radius:12px;

    transition:.25s;
}

nav a:hover{

    background:#eff6ff;

    color:var(--primary);
}

nav a.active{

    background:var(--primary);

    color:white;
}


/* =========================
   HERO
========================= */

.hero{

    padding:120px 0;

    text-align:center;

    background:
        linear-gradient(
            135deg,
            #eff6ff,
            #ffffff
        );
}

.badge{

    display:inline-block;

    padding:10px 18px;

    border-radius:999px;

    background:#dbeafe;

    color:var(--primary);

    font-weight:700;

    margin-bottom:25px;
}

.hero h1{

    font-size:4rem;

    font-weight:900;

    line-height:1.2;

    margin-bottom:20px;
}

.hero p{

    max-width:700px;

    margin:0 auto;

    color:var(--text-light);

    font-size:1.15rem;

    margin-bottom:40px;
}

.hero-buttons{

    display:flex;

    justify-content:center;

    gap:15px;

    flex-wrap:wrap;
}


/* =========================
   BUTTON
========================= */

.btn-primary{

    display:inline-flex;

    align-items:center;

    justify-content:center;

    padding:15px 28px;

    border-radius:14px;

    background:var(--primary);

    color:white;

    font-weight:700;

    transition:.25s;
}

.btn-primary:hover{

    background:var(--primary-dark);

    transform:translateY(-2px);
}

.btn-secondary{

    display:inline-flex;

    align-items:center;

    justify-content:center;

    padding:15px 28px;

    border-radius:14px;

    border:1px solid var(--border);

    background:white;

    font-weight:700;

    transition:.25s;
}

.btn-secondary:hover{

    transform:translateY(-2px);

    box-shadow:var(--shadow);
}


/* =========================
   PAGE HEADER
========================= */

.page-header{

    padding:90px 0 60px;

    text-align:center;
}

.page-header h1{

    font-size:3rem;

    font-weight:900;

    margin-bottom:15px;
}

.page-header p{

    color:var(--text-light);
}


/* =========================
   CARD
========================= */

.card{

    background:white;

    border-radius:var(--radius);

    padding:25px;

    box-shadow:var(--shadow);
}


/* =========================
   BOARD
========================= */

.board-header{

    display:grid;

    grid-template-columns:
        1fr 140px;

    background:#eef2ff;

    border:1px solid #dbeafe;

    border-radius:16px;

    padding:18px 24px;

    font-weight:800;

    color:#1e3a8a;

    margin-bottom:12px;
}

.board-header div:last-child{
    text-align:center;
}


.board-row{

    display:grid;

    grid-template-columns:
        1fr 140px;

    align-items:center;

    background:white;

    padding:18px 24px;

    margin-bottom:10px;

    border-radius:16px;

    border:1px solid var(--border);

    transition:.25s;
}

.board-row:hover{

    transform:translateY(-3px);

    box-shadow:
        0 15px 35px rgba(37,99,235,.08);

    border-color:#bfdbfe;
}

.board-row span:first-child{

    font-weight:600;

    overflow:hidden;

    text-overflow:ellipsis;

    white-space:nowrap;
}

.board-row span:last-child{

    text-align:center;

    color:var(--text-light);

    font-size:.95rem;
}


/* =========================
   SEARCH
========================= */

.search-box{

    margin-bottom:25px;
}

.search-box input{

    width:100%;

    padding:16px 20px;

    border:1px solid var(--border);

    border-radius:16px;

    background:white;

    font-size:1rem;

    transition:.25s;
}

.search-box input:focus{

    outline:none;

    border-color:var(--primary);

    box-shadow:
        0 0 0 4px
        rgba(37,99,235,.1);
}


/* =========================
   CATEGORY
========================= */

.category-filter{

    display:flex;

    flex-wrap:wrap;

    gap:10px;

    margin-bottom:25px;
}

.category-btn{

    border:none;

    cursor:pointer;

    padding:12px 18px;

    border-radius:999px;

    background:white;

    border:1px solid var(--border);

    font-weight:600;

    transition:.25s;
}

.category-btn:hover{

    border-color:#93c5fd;

    color:var(--primary);
}

.category-btn.active{

    background:var(--primary);

    color:white;

    border-color:var(--primary);
}


/* =========================
   SORT
========================= */

.sort-box{

    display:flex;

    justify-content:flex-end;

    margin-bottom:25px;
}

.sort-box select{

    padding:12px 16px;

    border-radius:14px;

    border:1px solid var(--border);

    background:white;

    cursor:pointer;

    font-size:.95rem;
}

.sort-box select:focus{

    outline:none;

    border-color:var(--primary);
}


/* =========================
   FEATURED PRODUCT
========================= */

#featuredProduct{

    background:
        linear-gradient(
            135deg,
            #2563eb,
            #3b82f6
        );

    border-radius:24px;

    padding:30px;

    color:white;

    box-shadow:
        0 20px 40px
        rgba(37,99,235,.25);
}

#featuredProduct .board-row{

    background:transparent;

    border:none;

    padding:0;

    color:white;

    margin:0;

    box-shadow:none;
}

#featuredProduct .board-row:hover{

    transform:none;
}

#featuredProduct span{

    color:white !important;

    font-size:1.1rem;
}


/* =========================
   CONTENT PAGE
========================= */

.content-page{

    background:white;

    border-radius:24px;

    padding:40px;

    box-shadow:var(--shadow);
}

.content-page h1{

    font-size:2.3rem;

    margin-bottom:15px;

    line-height:1.3;
}

.meta{

    color:var(--text-light);

    margin-bottom:25px;

    padding-bottom:20px;

    border-bottom:
        1px solid var(--border);
}

#content{

    margin-top:30px;

    line-height:1.9;
}

#content p{

    margin-bottom:18px;
}


/* =========================
   FOOTER
========================= */

footer{

    margin-top:80px;

    background:white;

    border-top:
        1px solid var(--border);

    padding:40px 0;

    text-align:center;

    color:var(--text-light);
}


/* =========================
   PRODUCT STATS (수정본)
========================= */

.stats{

    display:grid;

    grid-template-columns:
        repeat(auto-fit, minmax(160px, 1fr));

    gap:15px;

    margin:30px 0;
}

.stat-card{

    background:white;

    border:1px solid var(--border);

    border-radius:18px;

    padding:22px;

    text-align:center;

    transition:.25s;

}

.stat-card:hover{

    transform:translateY(-4px);

    box-shadow:
        0 12px 25px rgba(0,0,0,.08);
}

.stat-card strong{

    display:block;

    font-size:1.6rem;

    font-weight:800;

    color:var(--primary);

    margin-bottom:6px;
}

.stat-card span{

    color:var(--text-light);

    font-size:.9rem;
}

/* =========================
   PREVIEW IMAGE
========================= */

.preview-image{

    width:100%;

    border-radius:20px;

    margin:30px 0;

    border:1px solid var(--border);

    box-shadow:
        0 10px 25px rgba(0,0,0,.06);

    transition:.3s;
}

.preview-image:hover{

    transform:scale(1.01);
}


/* =========================
   TAGS
========================= */

.tags{

    display:flex;

    flex-wrap:wrap;

    gap:10px;

    margin:25px 0;
}

.tag{

    display:inline-flex;

    align-items:center;

    padding:8px 14px;

    border-radius:999px;

    background:#eff6ff;

    color:var(--primary);

    font-size:.9rem;

    font-weight:700;

    border:1px solid #bfdbfe;
}

.tag:hover{

    background:#dbeafe;
}


/* =========================
   DOWNLOAD BOX
========================= */

.download-box{

    margin-top:40px;

    padding:30px;

    border-radius:24px;

    background:
        linear-gradient(
            135deg,
            #eff6ff,
            #ffffff
        );

    border:1px solid #dbeafe;
}

.download-box h3{

    font-size:1.4rem;

    margin-bottom:10px;
}

.download-box p{

    color:var(--text-light);

    margin-bottom:20px;
}


/* =========================
   REQUEST PAGE
========================= */

.request-card{

    background:white;

    border-radius:24px;

    padding:40px;

    text-align:center;

    box-shadow:var(--shadow);
}

.request-card h2{

    font-size:2rem;

    margin-bottom:15px;
}

.request-card p{

    color:var(--text-light);

    margin-bottom:25px;
}


/* =========================
   NOTICE CONTENT
========================= */

.notice-content{

    line-height:2;

    font-size:1.05rem;
}

.notice-content img{

    max-width:100%;

    border-radius:16px;

    margin:20px 0;
}


/* =========================
   EMPTY STATE
========================= */

.empty-state{

    background:white;

    border-radius:20px;

    padding:60px 20px;

    text-align:center;

    border:1px dashed var(--border);

    color:var(--text-light);
}

.empty-state h3{

    margin-bottom:10px;

    color:var(--text);
}


/* =========================
   FADE ANIMATION
========================= */

@keyframes fadeUp{

    from{

        opacity:0;

        transform:
            translateY(20px);

    }

    to{

        opacity:1;

        transform:
            translateY(0);

    }
}

.hero,
.board-row,
.card,
.content-page,
.download-box{

    animation:
        fadeUp .5s ease;
}


/* =========================
   SCROLLBAR
========================= */

::-webkit-scrollbar{

    width:10px;
}

::-webkit-scrollbar-track{

    background:#f1f5f9;
}

::-webkit-scrollbar-thumb{

    background:#cbd5e1;

    border-radius:999px;
}

::-webkit-scrollbar-thumb:hover{

    background:#94a3b8;
}


/* =========================
   MOBILE
========================= */

@media (max-width:900px){

    .hero h1{

        font-size:2.8rem;
    }

    .stats{

        grid-template-columns:1fr;
    }

    .content-page{

        padding:25px;
    }

    .page-header h1{

        font-size:2.3rem;
    }
}

@media (max-width:768px){

    .navbar{

        flex-direction:column;

        height:auto;

        padding:20px 0;
    }

    nav ul{

        flex-wrap:wrap;

        justify-content:center;
    }

    .hero{

        padding:90px 0;
    }

    .hero h1{

        font-size:2.2rem;
    }

    .hero p{

        font-size:1rem;
    }

    .board-header,
    .board-row{

        grid-template-columns:
            1fr 90px;
    }

    .section{

        padding:60px 0;
    }
}

@media (max-width:500px){

    .board-header{

        display:none;
    }

    .board-row{

        grid-template-columns:1fr;

        gap:10px;
    }

    .board-row span:last-child{

        text-align:left;
    }

    .hero h1{

        font-size:1.8rem;
    }

    .logo{

        font-size:1.5rem;
    }

    .btn-primary,
    .btn-secondary{

        width:100%;
    }

    .hero-buttons{

        flex-direction:column;
    }
}


/* =========================
   NOTICE PIN
========================= */

.notice-pin{

    display:inline-flex;

    align-items:center;

    gap:6px;

    background:#fef3c7;

    color:#92400e;

    padding:6px 12px;

    border-radius:999px;

    font-size:.85rem;

    font-weight:700;

    margin-right:10px;
}


/* =========================
   STATS HOVER
========================= */

.stat-card{

    transition:.25s;
}

.stat-card:hover{

    transform:translateY(-4px);

    box-shadow:
        0 12px 25px
        rgba(0,0,0,.08);

    border-color:#bfdbfe;
}


/* =========================
   FEATURE BADGE
========================= */

.feature-badge{

    display:inline-flex;

    align-items:center;

    gap:6px;

    padding:8px 14px;

    border-radius:999px;

    background:#fef9c3;

    color:#854d0e;

    font-size:.85rem;

    font-weight:700;
}


/* =========================
   PRODUCT THUMBNAIL CARD
========================= */

.product-thumbnail{

    width:100%;

    border-radius:20px;

    overflow:hidden;

    margin-bottom:20px;

    border:1px solid var(--border);
}

.product-thumbnail img{

    width:100%;

    transition:.4s;
}

.product-thumbnail:hover img{

    transform:scale(1.05);
}


/* =========================
   RELATED PRODUCTS
========================= */

.related-products{

    margin-top:60px;
}

.related-products h3{

    margin-bottom:20px;

    font-size:1.5rem;
}

.related-grid{

    display:grid;

    grid-template-columns:
        repeat(auto-fit,minmax(250px,1fr));

    gap:20px;
}

.related-card{

    background:white;

    border:1px solid var(--border);

    border-radius:20px;

    padding:20px;

    transition:.25s;
}

.related-card:hover{

    transform:translateY(-4px);

    box-shadow:
        0 15px 30px rgba(0,0,0,.08);
}

.related-card h4{

    margin-bottom:10px;
}

.related-card p{

    color:var(--text-light);

    font-size:.95rem;
}


/* =========================
   LOADING SKELETON
========================= */

.skeleton{

    height:20px;

    border-radius:10px;

    background:
        linear-gradient(
            90deg,
            #f1f5f9 25%,
            #e2e8f0 50%,
            #f1f5f9 75%
        );

    background-size:200% 100%;

    animation:
        shimmer 1.5s infinite;
}

@keyframes shimmer{

    0%{
        background-position:
            200% 0;
    }

    100%{
        background-position:
            -200% 0;
    }
}


/* =========================
   BACK TO TOP
========================= */

.back-to-top{

    position:fixed;

    right:25px;

    bottom:25px;

    width:52px;

    height:52px;

    border:none;

    border-radius:50%;

    background:var(--primary);

    color:white;

    font-size:1.2rem;

    cursor:pointer;

    box-shadow:
        0 10px 25px
        rgba(37,99,235,.3);

    transition:.25s;

    z-index:999;
}

.back-to-top:hover{

    transform:translateY(-4px);
}


/* =========================
   GLASS CARD
========================= */

.glass-card{

    background:
        rgba(255,255,255,.75);

    backdrop-filter:
        blur(16px);

    border:
        1px solid rgba(255,255,255,.4);

    border-radius:24px;

    padding:30px;
}


/* =========================
   HOVER UNDERLINE
========================= */

.link-hover{

    position:relative;
}

.link-hover::after{

    content:"";

    position:absolute;

    left:0;

    bottom:-3px;

    width:0;

    height:2px;

    background:var(--primary);

    transition:.25s;
}

.link-hover:hover::after{

    width:100%;
}


/* =========================
   PREMIUM SHADOW
========================= */

.premium-card{

    background:white;

    border-radius:24px;

    padding:25px;

    box-shadow:
        0 25px 50px rgba(15,23,42,.08);

    transition:.3s;
}

.premium-card:hover{

    transform:translateY(-6px);

    box-shadow:
        0 35px 60px rgba(15,23,42,.12);
}


/* =========================
   STATUS BADGE
========================= */

.status-new{

    background:#dcfce7;

    color:#166534;

    padding:5px 10px;

    border-radius:999px;

    font-size:.8rem;

    font-weight:700;
}

.status-hot{

    background:#fee2e2;

    color:#b91c1c;

    padding:5px 10px;

    border-radius:999px;

    font-size:.8rem;

    font-weight:700;
}


/* =========================
   SELECTION COLOR
========================= */

::selection{

    background:#bfdbfe;

    color:#1e3a8a;
}

/* =========================
   INTRO CARDS (홈 소개)
========================= */

.intro-grid{

    display:grid;

    grid-template-columns:
        repeat(4,1fr);

    gap:20px;

    margin-top:30px;
}

.intro-card{

    background:white;

    border:1px solid var(--border);

    border-radius:20px;

    padding:25px;

    box-shadow:var(--shadow);

    transition:.3s;

}

.intro-card:hover{

    transform:translateY(-6px);

    box-shadow:
        0 20px 40px rgba(0,0,0,.1);
}

.intro-card h3{

    font-size:1.2rem;

    margin-bottom:10px;

    color:var(--primary);
}

.intro-card p{

    color:var(--text-light);

    line-height:1.6;
    font-size:.95rem;
}


@media (max-width: 480px){

    /* =========================
       HERO TITLE
    ========================= */

    .hero h1{
        font-size:1.8rem;
    }


    /* =========================
       BUTTONS
    ========================= */

    .hero-buttons{
        flex-direction:column;
        gap:10px;
    }

    .btn-primary,
    .btn-secondary{
        width:100%;
        text-align:center;
    }


    /* =========================
       SECTION TITLE
    ========================= */

    .section-title{
        font-size:1.4rem;
    }


    /* =========================
       CARD PADDING
    ========================= */

    .intro-card,
    .card,
    .premium-card{
        padding:18px;
    }


    /* =========================
       BOARD ROW TEXT
    ========================= */

    .board-row span:first-child{
        font-size:1rem;
    }


    /* =========================
       STATS TEXT
    ========================= */

    .stat-card strong{
        font-size:1.3rem;
    }
}


@media (max-width: 768px){

    /* =========================
       HERO
    ========================= */

    .hero h1{
        font-size:2.2rem;
    }

    .hero p{
        font-size:1rem;
    }

    .hero{
        padding:80px 0;
    }


    /* =========================
       INTRO CARDS
    ========================= */

    .intro-grid{
        grid-template-columns:1fr;
    }


    /* =========================
       BOARD
    ========================= */

    .board-header{
        display:none;
    }

    .board-row{
        grid-template-columns:1fr;
        gap:8px;
        padding:16px;
    }

    .board-row span:last-child{
        text-align:left;
        font-size:.9rem;
    }


    /* =========================
       STATS
    ========================= */

    .stats{
        grid-template-columns:1fr;
    }


    /* =========================
       CONTENT PAGE
    ========================= */

    .content-page{
        padding:25px;
    }


    /* =========================
       NAV
    ========================= */

    nav ul{
        flex-wrap:wrap;
        justify-content:center;
        gap:8px;
    }

    .navbar{
        flex-direction:column;
        height:auto;
        padding:15px 0;
    }
}