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

/* utility hide class used across JS */
.hidden {
    display: none !important;
}

:root {
    --black: #151515;
    --white: #ffffff;
    --beige: #cbb89b;
    --muted-dark: rgba(0, 0, 0, 0.45);
    --muted-light: rgba(255, 255, 255, 0.68);
    --radius: 10px;
    --gap: 16px;
}

body {
    font-family: "Inter", "Noto Sans KR", system-ui, -apple-system, "Segoe UI",
        Roboto, "Helvetica Neue", Arial;
    background: var(--black);
    min-height: 100vh;
    padding: 28px;
    color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 20px;
}
.brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--white);
}
.auth-section {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Buttons */
.btn {
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    color: var(--black);
}
.btn-primary {
    background: var(--beige);
    color: var(--black);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}
.btn-ghost {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.06);
}
.btn-danger {
    background: #ef4444;
    color: #fff;
}

/* Controls row */
.controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 18px;
    padding: 6px 0;
}
.sort-buttons {
    display: flex;
    gap: 8px;
}
.sort-btn {
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--muted-light);
    cursor: pointer;
}
.sort-btn:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--beige);
}
.sort-btn.active {
    background: var(--beige);
    color: var(--black);
}

/* Posts grid */
.posts-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: calc(var(--gap) * 1.15);
    grid-auto-rows: 1fr;
}
.post-card {
    background: var(--white);
    color: var(--black);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
    border: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    aspect-ratio: 1 / 1;
    overflow: hidden;
}
.post-card:hover {
    transform: translateY(-6px);
    transition: transform 0.12s ease;
}
.post-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
}
.post-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--black);
}
.post-price {
    color: var(--beige);
    font-weight: 700;
}
.post-link {
    color: var(--black);
    font-weight: 600;
    text-decoration: none;
}
.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    gap: 8px;
    color: var(--muted-dark);
    font-size: 0.9rem;
}

.notice-badge {
    background: var(--beige);
    color: var(--black);
    padding: 6px 10px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.8rem;
}

.shop-badge {
    display: inline-block;
    margin-left: 8px;
    background: var(--beige);
    color: var(--black);
    padding: 4px 8px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.75rem;
    vertical-align: middle;
}

/* Like button */
.like-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: 8px;
    background: transparent;
    color: var(--black);
    border: 1px solid rgba(0, 0, 0, 0.06);
    font-size: 0.95rem;
}
.like-btn:hover {
    background: rgba(0, 0, 0, 0.03);
}
.like-btn.liked {
    background: var(--beige);
    color: var(--black);
    border: none;
}

/* Modal & forms */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(11, 11, 11, 0.6);
    z-index: 10000;
}
.modal.hidden {
    display: none;
}
.modal-content {
    width: 100%;
    max-width: 560px;
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
    border: none;
    color: var(--black);
    z-index: 10001;
}
.modal-content h2 {
    margin-bottom: 12px;
    font-size: 1.1rem;
    font-weight: 700;
}
.modal-content form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.modal-content input[type="text"],
.modal-content input[type="number"],
.modal-content input[type="url"],
.modal-content input[type="password"],
.modal-content input[type="email"] {
    background: transparent;
    border: 1px solid rgba(0, 0, 0, 0.08);
    color: var(--black);
    padding: 10px;
    border-radius: 8px;
}
.modal-content input:focus {
    outline: none;
    box-shadow: 0 0 0 6px rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.18);
}
.modal-content label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--black);
}
.close {
    position: absolute;
    right: 12px;
    top: 10px;
    background: transparent;
    border: none;
    color: var(--black);
    font-weight: 700;
    cursor: pointer;
    font-size: 22px;
}
.close:hover {
    color: #333;
}

/* Prevent background scroll while modal open */
body.modal-open {
    overflow: hidden;
    height: 100vh;
}

/* (image preview removed) */

/* small screens */
@media (max-width: 720px) {
    body {
        padding: 16px;
    }
    .posts-container {
        grid-template-columns: 1fr;
    }
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}

/* Medium screens: 2 columns */
@media (max-width: 1100px) {
    .posts-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
    }
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    .sort-buttons {
        justify-content: center;
    }
    .post-header {
        flex-direction: column;
    }
}

.post-date {
    color: #6c757d;
    font-size: 0.9rem;
}