/* ==========================================================================
   POSQA - Public (Participant) Styles
   ========================================================================== */

/* Header */
.public-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}
.event-logo {
    height: 36px;
    width: auto;
    flex-shrink: 0;
}
.posqa-logo {
    height: 28px;
    width: auto;
}
.event-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.header-poster-info {
    display: none;
}
@media (min-width: 640px) {
    .header-poster-info {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--color-text-secondary);
    }
}
.poster-num {
    font-weight: 700;
    color: var(--color-primary);
}
.poster-title-header {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Language switch */
.lang-switch {
    display: flex;
    gap: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.lang-switch a {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 0.15s;
}
.lang-switch a:hover {
    background: var(--color-bg);
}
.lang-switch a.active {
    background: var(--color-primary);
    color: var(--color-white);
}

/* Banner */
.event-banner {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 16px;
}
.event-banner img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    display: block;
}

/* Main */
.public-main {
    padding: 24px 0 60px;
    min-height: calc(100vh - 200px);
}

/* Footer */
.public-footer {
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    padding: 20px 16px;
    text-align: center;
    font-size: 13px;
    color: var(--color-text-light);
}
.footer-inner {
    max-width: 800px;
    margin: 0 auto;
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 8px;
}
.footer-links a {
    color: var(--color-text-secondary);
}
.copyright {
    margin-bottom: 4px;
}
.powered-by {
    font-size: 11px;
    color: var(--color-text-light);
}

/* ==========================================================================
   Landing Page
   ========================================================================== */
.landing-page {
    text-align: center;
    padding: 80px 20px 40px;
}
.landing-hero {
    margin-bottom: 40px;
}
.landing-logo {
    width: 120px;
    margin-bottom: 20px;
}
.landing-page h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}
.landing-subtitle {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}
.landing-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
}
.landing-links {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* ==========================================================================
   Inactive / Error Pages
   ========================================================================== */
.inactive-page, .error-page, .verify-page {
    text-align: center;
    padding: 60px 20px;
}
.inactive-message, .error-message, .verify-message {
    max-width: 400px;
    margin: 0 auto;
}
.inactive-icon, .error-icon, .verify-icon {
    font-size: 48px;
    margin-bottom: 16px;
}
.inactive-message h2, .error-message h2, .verify-message h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

/* ==========================================================================
   Poster List Page
   ========================================================================== */
.poster-list-page .page-header {
    margin-bottom: 24px;
}
.poster-list-page .page-header h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}
.event-description {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}
.poster-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}
@media (min-width: 640px) {
    .poster-grid {
        grid-template-columns: 1fr 1fr;
    }
}
.poster-card {
    display: block;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    text-decoration: none;
    transition: all 0.2s;
}
.poster-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}
.poster-card-header {
    margin-bottom: 8px;
}
.poster-number-badge {
    display: inline-block;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 700;
    font-size: 13px;
    padding: 2px 10px;
    border-radius: 20px;
}
.poster-card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
    line-height: 1.4;
}
.poster-card-presenter {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 2px;
}
.poster-card-affiliation {
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}
.poster-card-footer {
    padding-top: 8px;
    border-top: 1px solid var(--color-border-light);
}
.question-count {
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* ==========================================================================
   Poster Page (Individual)
   ========================================================================== */
.poster-info-section {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}
.poster-header-info {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 8px;
}
.poster-number-large {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 700;
    font-size: 14px;
    padding: 4px 12px;
    border-radius: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}
.poster-title-main {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.4;
}
.poster-presenter-info {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}
.poster-description {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}
.poster-files {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border-light);
}
.poster-files h4 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text-secondary);
}
.file-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.file-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-primary);
    padding: 6px 12px;
    background: var(--color-primary-light);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: background 0.15s;
}
.file-item:hover {
    background: #d0e3f7;
}
.file-size {
    font-size: 11px;
    color: var(--color-text-light);
}
.poster-nav {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border-light);
}

/* ==========================================================================
   Post Form
   ========================================================================== */
.post-form-section {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}
.post-form-section h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
}
.question-form .form-group {
    margin-bottom: 14px;
}
.question-form .form-group label {
    font-size: 13px;
    margin-bottom: 4px;
}
.question-form .form-group input,
.question-form .form-group textarea {
    font-size: 14px;
    padding: 9px 12px;
}
.auth-status {
    font-size: 12px;
    color: var(--color-text-light);
    margin-top: 8px;
}

/* ==========================================================================
   Posts List
   ========================================================================== */
.posts-section {
    margin-bottom: 24px;
}
.posts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.post-item {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    transition: border-color 0.15s;
}
.post-item:hover {
    border-color: #ccc;
}
.post-body {
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 10px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}
.post-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 13px;
    color: var(--color-text-light);
    flex-wrap: wrap;
}
.post-time {
    font-size: 12px;
}

/* Like Button */
.like-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 3px 10px;
    font-size: 13px;
    cursor: pointer;
    color: var(--color-text-light);
    transition: all 0.2s;
}
.like-btn:hover:not(:disabled) {
    border-color: #e8457c;
    color: #e8457c;
}
.like-btn.liked {
    background: #fde8ef;
    border-color: #e8457c;
    color: #e8457c;
}
.like-btn:disabled {
    opacity: 0.5;
    cursor: default;
}
.like-icon {
    font-size: 14px;
}
.like-count {
    font-weight: 500;
}
.reply-count-badge {
    font-size: 12px;
}

/* ==========================================================================
   Replies
   ========================================================================== */
.replies-list {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.reply-item {
    padding: 12px 14px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-border);
}
.reply-item.presenter-reply {
    background: var(--color-primary-light);
    border-left-color: var(--color-primary);
}
.reply-body {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 6px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}
.reply-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--color-text-light);
}
.reply-time {
    font-size: 11px;
}

/* Reply form */
.reply-form-wrapper {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--color-border-light);
}
.toggle-reply-form {
    font-size: 12px;
}
.reply-form {
    margin-top: 10px;
}
.reply-form textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: var(--font-family);
    resize: vertical;
    outline: none;
    margin-bottom: 8px;
}
.reply-form textarea:focus {
    border-color: var(--color-primary);
}

/* ==========================================================================
   Terms / Privacy Pages
   ========================================================================== */
.terms-page {
    padding: 20px 0;
}
.terms-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
}
.terms-card h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border-light);
}
.terms-content {
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}
.terms-back {
    padding-top: 16px;
    border-top: 1px solid var(--color-border-light);
}

/* Legal Pages */
.legal-page {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}
.legal-page h2 {
    font-size: 22px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border-light);
}
.legal-content {
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}
.empty-legal {
    color: var(--color-text-light);
    text-align: center;
    padding: 40px 0;
}
.legal-back {
    padding-top: 16px;
    border-top: 1px solid var(--color-border-light);
}

/* Reply form auth fields */
.reply-auth-fields {
    margin-bottom: 10px;
}
.reply-auth-fields .form-group {
    margin-bottom: 8px;
}
.reply-field-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 13px;
    font-family: var(--font-family);
    outline: none;
    transition: border-color 0.2s;
}
.reply-field-input:focus {
    border-color: var(--color-primary);
}
.reply-form-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
}
.reply-auth-note {
    font-size: 12px;
    color: var(--color-text-light);
}