:root {
    --primary-color: #007bff;
    --background-color: #f4f6f8;
    --card-background: #ffffff;
    --text-color: #333;
    --subtle-text-color: #666;
    --border-color: #e1e4e8;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --font-family: 'Noto Sans KR', sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

header {
    background-color: var(--card-background);
    padding: 0.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px var(--shadow-color);
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-greeting {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
}

.header-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.header-btn:hover {
    background: var(--primary-color);
    color: white;
}

main {
    max-width: 680px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.post-form-card {
    background: var(--card-background);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 5px var(--shadow-color);
}

.post-form-card h2 {
    margin: 0 0 1rem 0;
    font-size: 1.25rem;
}

#post-form textarea {
    width: 100%;
    min-height: 90px;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: var(--font-family);
    font-size: 1rem;
    resize: vertical;
    box-sizing: border-box;
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
}

#char-counter {
    color: var(--subtle-text-color);
    font-size: 0.9rem;
}

#post-form button {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 6px;
    background-color: var(--primary-color);
    color: white;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s;
}

#post-form button:hover {
    background-color: #0056b3;
}

#posts-container {
    display: grid;
    gap: 1.5rem;
}

.empty-msg {
    text-align: center;
    color: var(--subtle-text-color);
    padding: 2rem;
    background: var(--card-background);
    border-radius: 8px;
}

/* 전용 로그인 페이지 스타일 (login.html) */
.login-page {
    background-color: #eef2f6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-card {
    background: var(--card-background);
    padding: 3.5rem 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    text-align: center;
    width: 100%;
    max-width: 420px;
}

.login-logo {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.login-desc {
    color: var(--subtle-text-color);
    margin-bottom: 2rem;
    font-size: 1.15rem;
    line-height: 1.5;
}

/* 이메일 로그인 및 회원가입 폼 공통 스타일 */
.email-login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-color);
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

.email-login-form input, 
.email-login-form select {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
}

.signup-card {
    max-width: 500px;
}

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
    gap: 8px;
    margin-top: 0.5rem;
}

.checkbox-group input {
    margin-top: 4px;
}

.checkbox-group label {
    font-weight: 400;
    font-size: 0.85rem;
    line-height: 1.4;
    cursor: pointer;
}

.login-options {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.primary-btn {
    flex: 1;
    padding: 0.85rem;
    border: none;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    font-size: 1rem;
}

.secondary-btn {
    flex: 1;
    padding: 0.85rem;
    border: 1px solid var(--primary-color);
    background: white;
    color: var(--primary-color);
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    font-size: 1rem;
}

.login-options {
    margin-top: 1rem;
    font-size: 0.95rem;
    color: var(--subtle-text-color);
}

.link-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    font-weight: 700;
    cursor: pointer;
    padding: 0;
    font-size: inherit;
    text-decoration: underline;
}

.link-btn:hover {
    color: #0056b3;
}

.divider {
    position: relative;
    margin: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.divider span {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    padding: 0 10px;
    color: var(--subtle-text-color);
    font-size: 0.9rem;
}

.google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 0.85rem;
    border: 1px solid #ddd;
    background: white;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.google-btn:hover {
    background-color: #f8f9fa;
    border-color: #ccc;
}

.google-btn img {
    width: 20px;
}

.login-footer {
    margin-top: 2rem;
}

.login-footer a {
    color: var(--subtle-text-color);
    text-decoration: none;
    font-size: 0.95rem;
}

.login-footer a:hover {
    text-decoration: underline;
}

/* 게시글 스타일 (article.sns-post) */
.sns-post {
    display: block;
    background: var(--card-background);
    border-radius: 8px;
    box-shadow: 0 2px 5px var(--shadow-color);
    overflow: hidden;
    margin-bottom: 1rem;
}

.post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem 0 1.5rem;
}

.author-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.author-photo {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.author-emoji {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: #f0f2f5;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.author-name {
    font-weight: 700;
    font-size: 1rem;
}

.post-date {
    font-size: 0.85rem;
    color: var(--subtle-text-color);
}

.post-content {
    padding: 1rem 1.5rem;
    white-space: pre-wrap;
    font-size: 1.1rem;
    word-break: break-all;
}

.post-footer {
    padding: 0.5rem 1.5rem 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.comment-toggle-btn {
    background: none;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.comment-toggle-btn:hover {
    background: var(--primary-color);
    color: white;
}

.comment-section {
    padding: 1rem 1.5rem 1.5rem 1.5rem;
    background: #fafbfc;
}

comment-section h3 {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    font-weight: 700;
}

.comment-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem 0;
}

.comment {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.comment:last-child {
    border-bottom: none;
}

.comment-form {
    display: flex;
    gap: 0.5rem;
}

.comment-form input {
    flex-grow: 1;
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 4px;
}

.comment-form button {
    padding: 0.5rem 1rem;
    border: none;
    background-color: var(--primary-color);
    color: white;
    border-radius: 4px;
    cursor: pointer;
}