/* Base Styles */
:root {
    --primary-color: #3182f6;
    --primary-hover: #1b64da;
    --secondary-color: #6b7684;
    --success-color: #00c73c;
    --danger-color: #f04452;
    --warning-color: #ff9500;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e8eb;
    --text-primary: #191f28;
    --text-secondary: #6b7684;
    --text-muted: #8b95a1;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

html, body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

h1:focus {
    outline: none;
}

a, .btn-link {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    color: var(--primary-hover);
}

/* Buttons */
.btn {
    font-weight: 600;
    border-radius: var(--radius-sm);
    padding: 0.625rem 1.25rem;
    transition: all 0.2s ease;
    border: none;
}

.btn-primary {
    color: #fff;
    background-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    color: var(--text-secondary);
    background-color: #f2f4f6;
}

.btn-secondary:hover {
    background-color: #e5e8eb;
}

.btn-edit {
    color: var(--primary-color);
    background-color: #e8f3ff;
}

.btn-edit:hover {
    background-color: #d4e8ff;
}

.btn-delete {
    color: var(--danger-color);
    background-color: #ffebee;
}

.btn-delete:hover {
    background-color: #ffcdd2;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(49, 130, 246, 0.2);
}

/* Form Controls */
.form-control {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(49, 130, 246, 0.15);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.content {
    padding-top: 1.5rem;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--success-color);
}

.invalid {
    outline: 1px solid var(--danger-color);
}

.validation-message {
    color: var(--danger-color);
}

/* Error UI */
#blazor-error-ui {
    background: #fff3cd;
    bottom: 0;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    display: none;
    left: 0;
    padding: 1rem 1.5rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
    font-size: 0.95rem;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 1rem;
    top: 0.75rem;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
    border-radius: var(--radius-sm);
}

.blazor-error-boundary::after {
    content: "오류가 발생했습니다."
}

/* Loading */
.loading-progress {
    position: relative;
    display: block;
    width: 8rem;
    height: 8rem;
    margin: 20vh auto 1rem auto;
}

.loading-progress circle {
    fill: none;
    stroke: #e0e0e0;
    stroke-width: 0.6rem;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.loading-progress circle:last-child {
    stroke: var(--primary-color);
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray 0.05s ease-in-out;
}

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
}

.loading-progress-text:after {
    content: var(--blazor-load-percentage-text, "불러오는 중");
}

code {
    color: #e91e63;
    background: #fce4ec;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

/* ========================================
   Posts List Page (홈)
======================================== */
.posts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.posts-header h1 {
    margin: 0;
    font-size: 1.75rem;
    color: var(--text-primary);
}

.search-box {
    min-width: 280px;
}

.search-box .form-control {
    border-radius: 24px;
    padding: 0.75rem 1.25rem;
    background-color: #fff;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
}

.search-box .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

/* Category Filter */
.category-filter {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding: 0.5rem;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.category-filter::-webkit-scrollbar {
    height: 4px;
}

.category-filter::-webkit-scrollbar-track {
    background: transparent;
}

.category-filter::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.category-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.category-tab:hover {
    background: #f2f4f6;
    color: var(--text-primary);
}

.category-tab.active {
    background: var(--primary-color);
    color: #fff;
}

.category-tab.active .category-count {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.category-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.5rem;
    height: 1.5rem;
    padding: 0 0.4rem;
    background: #e5e8eb;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 10px;
}

/* Posts List */
.posts-list {
    display: grid;
    gap: 1rem;
}

.post-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
}

.post-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.post-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.post-card-header h3 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.category-badge {
    background: linear-gradient(135deg, #e8f3ff 0%, #d4e8ff 100%);
    color: var(--primary-color);
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.category-badge:hover {
    background: linear-gradient(135deg, #d4e8ff 0%, #b8d4ff 100%);
    transform: scale(1.05);
}

.post-preview {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0.75rem 0;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.post-actions {
    display: flex;
    gap: 0.5rem;
}

.post-actions .btn {
    padding: 0.4rem 0.9rem;
    font-size: 0.85rem;
}

/* ========================================
   Editor Page (에디터)
======================================== */
.editor-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 100px);
}

.editor-toolbar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    background: var(--card-bg);
    padding: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.title-input {
    flex: 1;
    min-width: 200px;
    font-size: 1.15rem;
    font-weight: 600;
    border: none;
    background: transparent;
}

.title-input:focus {
    box-shadow: none;
    border-bottom: 2px solid var(--primary-color);
    border-radius: 0;
}

.category-input {
    width: 140px;
}

.toolbar-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.editor-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    flex: 1;
    min-height: 0;
}

.editor-pane, .preview-pane {
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.pane-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #f1f3f5 100%);
    padding: 0.75rem 1.25rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.markdown-input {
    flex: 1;
    border: none;
    padding: 1.25rem;
    resize: none;
    font-family: 'D2Coding', 'Consolas', 'Monaco', monospace;
    font-size: 0.95rem;
    line-height: 1.8;
    background: #fafbfc;
}

.markdown-input:focus {
    outline: none;
    background: #fff;
}

.markdown-preview {
    flex: 1;
    padding: 1.25rem;
    overflow-y: auto;
    background: #fff;
    line-height: 1.8;
}

/* ========================================
   View Page (글 보기)
======================================== */
.view-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.view-title-section h1 {
    margin: 0 0 0.75rem 0;
    font-size: 1.75rem;
    line-height: 1.4;
}

.view-actions {
    display: flex;
    gap: 0.5rem;
}

.view-meta {
    display: flex;
    gap: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.view-content {
    line-height: 1.9;
    font-size: 1.05rem;
}

/* ========================================
   Markdown Body Styles
======================================== */
.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 700;
}

.markdown-body h1 { font-size: 1.75rem; }
.markdown-body h2 { font-size: 1.5rem; }
.markdown-body h3 { font-size: 1.25rem; border-bottom: none; }

.markdown-body p {
    margin-bottom: 1.25rem;
}

.markdown-body code {
    background: #f1f3f5;
    color: #e91e63;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'D2Coding', 'Consolas', monospace;
}

.markdown-body pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 1.5rem 0;
}

.markdown-body pre code {
    background: none;
    color: inherit;
    padding: 0;
}

.markdown-body blockquote {
    border-left: 4px solid var(--primary-color);
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #f1f3f5 100%);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
}

.markdown-body ul, .markdown-body ol {
    padding-left: 1.75rem;
    margin-bottom: 1.25rem;
}

.markdown-body li {
    margin-bottom: 0.5rem;
}

.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.markdown-body th, .markdown-body td {
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    text-align: left;
}

.markdown-body th {
    background: linear-gradient(135deg, #f8f9fa 0%, #f1f3f5 100%);
    font-weight: 600;
}

.markdown-body tr:hover {
    background: #fafbfc;
}

.markdown-body img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    margin: 1rem 0;
}

.markdown-body hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 768px) {
    .editor-main {
        grid-template-columns: 1fr;
    }

    .preview-pane {
        display: none;
    }

    .posts-header {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        min-width: 100%;
    }

    .view-container {
        padding: 1.5rem;
        margin: 0 -1rem;
        border-radius: 0;
    }

    .view-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    .post-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .post-actions {
        width: 100%;
    }

    .post-actions .btn {
        flex: 1;
    }
}