/**
 * Grid System
 * 숨카(SUMCAR) 프로젝트
 *
 * 12-column Grid (Desktop) / 4-column Grid (Mobile)
 * CSS Grid + Flexbox Fallback (IE11 호환)
 */

/* ========================================
   Container
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    max-width: var(--container-max-width, 1200px);
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-left: var(--container-padding, 24px);
    padding-right: 24px;
    padding-right: var(--container-padding, 24px);
}

@media (max-width: 767px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
}

/* ========================================
   CSS Grid (Modern Browsers)
   ======================================== */
.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
    gap: var(--grid-gutter, 24px);
}

/* Column Spans - Desktop */
.col-1 { grid-column: span 1; }
.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }

/* Column Spans - Mobile */
@media (max-width: 767px) {
    .grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }

    .col-sm-1 { grid-column: span 1; }
    .col-sm-2 { grid-column: span 2; }
    .col-sm-3 { grid-column: span 3; }
    .col-sm-4 { grid-column: span 4; }

    /* 모바일에서 기본적으로 full-width */
    .col-1, .col-2, .col-3, .col-4,
    .col-5, .col-6, .col-7, .col-8,
    .col-9, .col-10, .col-11, .col-12 {
        grid-column: span 4;
    }
}

/* ========================================
   Flexbox Fallback (IE11)
   ======================================== */
@supports not (display: grid) {
    .grid {
        display: flex;
        display: -ms-flexbox;
        flex-wrap: wrap;
        -ms-flex-wrap: wrap;
        margin-left: -12px;
        margin-right: -12px;
    }

    .grid > * {
        padding-left: 12px;
        padding-right: 12px;
        margin-bottom: 24px;
    }

    /* Desktop Columns */
    .col-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
    .col-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
    .col-3 { flex: 0 0 25%; max-width: 25%; }
    .col-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
    .col-6 { flex: 0 0 50%; max-width: 50%; }
    .col-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
    .col-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-9 { flex: 0 0 75%; max-width: 75%; }
    .col-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
    .col-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
    .col-12 { flex: 0 0 100%; max-width: 100%; }

    @media (max-width: 767px) {
        .grid {
            margin-left: -8px;
            margin-right: -8px;
        }

        .grid > * {
            padding-left: 8px;
            padding-right: 8px;
            margin-bottom: 16px;
        }

        /* Mobile: 전부 full-width 기본 */
        .col-1, .col-2, .col-3, .col-4,
        .col-5, .col-6, .col-7, .col-8,
        .col-9, .col-10, .col-11, .col-12 {
            flex: 0 0 100%;
            max-width: 100%;
        }

        .col-sm-1 { flex: 0 0 25%; max-width: 25%; }
        .col-sm-2 { flex: 0 0 50%; max-width: 50%; }
        .col-sm-3 { flex: 0 0 75%; max-width: 75%; }
        .col-sm-4 { flex: 0 0 100%; max-width: 100%; }
    }
}

/* ========================================
   Traditional Row/Col System
   ======================================== */
.row {
    display: flex;
    display: -ms-flexbox;
    flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    margin-left: -12px;
    margin-right: -12px;
}

.row > * {
    padding-left: 12px;
    padding-right: 12px;
}

.col {
    flex: 1 0 0%;
    -ms-flex: 1 0 0%;
}

.col-auto {
    flex: 0 0 auto;
    -ms-flex: 0 0 auto;
    width: auto;
}

/* ========================================
   Utility Classes
   ======================================== */

/* Alignment */
.align-items-start {
    align-items: flex-start;
    -ms-flex-align: start;
}

.align-items-center {
    align-items: center;
    -ms-flex-align: center;
}

.align-items-end {
    align-items: flex-end;
    -ms-flex-align: end;
}

.justify-content-start {
    justify-content: flex-start;
    -ms-flex-pack: start;
}

.justify-content-center {
    justify-content: center;
    -ms-flex-pack: center;
}

.justify-content-end {
    justify-content: flex-end;
    -ms-flex-pack: end;
}

.justify-content-between {
    justify-content: space-between;
    -ms-flex-pack: justify;
}

/* Gap Utilities */
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.gap-32 { gap: 32px; }

@supports not (gap: 24px) {
    .gap-8 > * { margin: 4px; }
    .gap-16 > * { margin: 8px; }
    .gap-24 > * { margin: 12px; }
    .gap-32 > * { margin: 16px; }
}

/* ========================================
   Responsive Utilities
   ======================================== */

/* Hide/Show */
.hide-mobile {
    display: block;
}

.hide-desktop {
    display: none;
}

@media (max-width: 767px) {
    .hide-mobile {
        display: none;
    }

    .hide-desktop {
        display: block;
    }
}

/* Text Align */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

@media (max-width: 767px) {
    .text-sm-left { text-align: left; }
    .text-sm-center { text-align: center; }
    .text-sm-right { text-align: right; }
}