/* ============================================
   MODERN BLOG EDITOR - PREMIUM STYLES
   ============================================ */

/* Import Google Font - Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   CSS VARIABLES & THEME
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Theme Colors */
    --bg-primary: rgba(255, 255, 255, 0.15);
    --bg-secondary: rgba(255, 255, 255, 0.08);
    --bg-tertiary: rgba(255, 255, 255, 0.05);
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-tertiary: #718096;
    --border-color: rgba(255, 255, 255, 0.3);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.18);
    --shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.15);
    --accent: #06b6d4;
    --accent-hover: #0891b2;
    --accent-light: rgba(6, 182, 212, 0.1);
    --success: #10b981;
    --gradient-primary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #14b8a6 0%, #06b6d4 100%);
}

body.dark {
    /* Dark Theme Colors */
    --bg-primary: rgba(0, 0, 0, 0.4);
    --bg-secondary: rgba(0, 0, 0, 0.25);
    --bg-tertiary: rgba(0, 0, 0, 0.15);
    --text-primary: #f7fafc;
    --text-secondary: #cbd5e0;
    --text-tertiary: #a0aec0;
    --border-color: rgba(255, 255, 255, 0.15);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.5);
    --shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.6);
    --accent: #22d3ee;
    --accent-hover: #06b6d4;
    --accent-light: rgba(34, 211, 238, 0.15);
    --gradient-primary: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    --gradient-secondary: linear-gradient(135deg, #0c4a6e 0%, #075985 100%);
}

/* ============================================
   BASE STYLES
   ============================================ */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gradient-primary);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    padding: 20px;
    transition: background 0.5s ease, color 0.3s ease;
    color: var(--text-primary);
    position: relative;
    overflow-x: hidden;
}

/* Animated gradient background */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Subtle parallax effect */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

.container {
    max-width: 1800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* ============================================
   HEADER
   ============================================ */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 24px 32px;
    background: var(--bg-primary);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.header:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.header-controls {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* ============================================
   BUTTONS
   ============================================ */
.theme-toggle,
.publish-btn,
.download-btn,
.toolbar-btn,
.copy-btn,
.back-btn {
    padding: 12px 20px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow);
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    position: relative;
    overflow: hidden;
}

.theme-toggle {
    width: 52px;
    height: 52px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.publish-btn {
    background: var(--accent);
    color: white;
    border: none;
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.3);
}

.publish-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(6, 182, 212, 0.4);
}

.theme-toggle:hover,
.download-btn:hover,
.toolbar-btn:hover,
.copy-btn:hover,
.back-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    background: var(--bg-primary);
    border-color: var(--accent);
}

.theme-toggle:active,
.publish-btn:active,
.download-btn:active,
.toolbar-btn:active,
.copy-btn:active,
.back-btn:active {
    transform: translateY(0);
}

/* Glow effect on hover */
.publish-btn::before,
.download-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(6, 182, 212, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.publish-btn:hover::before,
.download-btn:hover::before {
    width: 300px;
    height: 300px;
}

/* ============================================
   TOOLBAR
   ============================================ */
.toolbar {
    display: flex;
    gap: 8px;
    padding: 12px;
    background: var(--bg-secondary);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.toolbar-btn {
    padding: 8px 16px;
    font-size: 0.875rem;
    min-width: auto;
}

.toolbar-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* ============================================
   EDITOR CONTAINER
   ============================================ */
.editor-container {
    display: grid;
    grid-template-columns: 1fr 4px 1fr;
    gap: 0;
    height: calc(100vh - 200px);
    min-height: 600px;
}

.editor-panel,
.preview-panel {
    background: var(--bg-primary);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-strong);
    padding: 28px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.editor-panel:hover,
.preview-panel:hover {
    box-shadow: var(--shadow-hover);
}

.preview-panel {
    background: var(--bg-secondary);
}

/* Resizable divider */
.resizer {
    background: var(--border-color);
    cursor: col-resize;
    border-radius: 2px;
    transition: background 0.2s ease;
    position: relative;
}

.resizer:hover {
    background: var(--accent);
}

.resizer::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 40px;
    background: var(--accent);
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.resizer:hover::before {
    opacity: 1;
}

/* ============================================
   INPUT GROUPS
   ============================================ */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: 18px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow);
}

.input-group input:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-light), var(--shadow);
    transform: translateY(-1px);
}

.input-group textarea {
    min-height: 450px;
    resize: vertical;
    font-family: 'Courier New', 'Consolas', monospace;
    line-height: 1.7;
}

/* ============================================
   STATS BAR (Word/Character Count)
   ============================================ */
.stats-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 12px;
    margin-top: auto;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.stats-item strong {
    color: var(--accent);
    font-weight: 600;
}

/* ============================================
   ACTION BUTTONS
   ============================================ */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.download-btn,
.copy-btn {
    flex: 1;
}

/* ============================================
   PREVIEW
   ============================================ */
.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
}

.preview-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.preview-content {
    flex: 1;
    line-height: 1.9;
    color: var(--text-primary);
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

.preview-placeholder {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-tertiary);
    font-style: italic;
    font-size: 1.1rem;
}

/* ============================================
   MARKDOWN STYLING
   ============================================ */
.preview-content h1,
.preview-content h2,
.preview-content h3,
.preview-content h4,
.preview-content h5,
.preview-content h6,
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    margin-top: 32px;
    margin-bottom: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.preview-content h1,
.post-content h1 {
    font-size: 2.5rem;
    border-bottom: 3px solid var(--accent);
    padding-bottom: 12px;
}

.preview-content h2,
.post-content h2 {
    font-size: 2rem;
}

.preview-content h3,
.post-content h3 {
    font-size: 1.5rem;
}

.preview-content p,
.post-content p {
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.preview-content ul,
.preview-content ol,
.post-content ul,
.post-content ol {
    margin-bottom: 20px;
    padding-left: 32px;
}

.preview-content li,
.post-content li {
    margin-bottom: 10px;
}

.preview-content code,
.post-content code {
    background: var(--bg-tertiary);
    padding: 3px 8px;
    border-radius: 6px;
    font-family: 'Courier New', 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
    border: 1px solid var(--border-color);
    color: var(--accent);
    font-weight: 500;
}

.preview-content pre,
.post-content pre {
    background: var(--bg-tertiary);
    padding: 20px;
    border-radius: 16px;
    overflow-x: auto;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.preview-content pre code,
.post-content pre code {
    background: none;
    padding: 0;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.preview-content blockquote,
.post-content blockquote {
    border-left: 4px solid var(--accent);
    padding-left: 24px;
    margin: 24px 0;
    color: var(--text-secondary);
    font-style: italic;
    background: var(--bg-tertiary);
    padding: 16px 24px;
    border-radius: 12px;
}

.preview-content img,
.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: 18px;
    margin: 24px 0;
    box-shadow: var(--shadow-strong);
    transition: transform 0.3s ease;
}

.preview-content img:hover,
.post-content img:hover {
    transform: scale(1.02);
}

.preview-content a,
.post-content a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
    font-weight: 500;
}

.preview-content a:hover,
.post-content a:hover {
    border-bottom-color: var(--accent);
}

.preview-content hr,
.post-content hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 32px 0;
}

.preview-content table,
.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.preview-content th,
.preview-content td,
.post-content th,
.post-content td {
    padding: 14px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.preview-content th,
.post-content th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.preview-content strong,
.post-content strong {
    font-weight: 700;
}

.preview-content em,
.post-content em {
    font-style: italic;
}

/* ============================================
   PUBLISH PAGE
   ============================================ */
.publish-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
    position: relative;
    z-index: 1;
}

.publish-content {
    background: var(--bg-primary);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-strong);
    padding: 48px;
    animation: fadeIn 0.5s ease;
}

.back-btn {
    margin-bottom: 32px;
}

.published-post {
    color: var(--text-primary);
}

.post-header {
    margin-bottom: 40px;
}

.post-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -1px;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

.separator {
    color: var(--text-tertiary);
}

.cover-image-container {
    margin-bottom: 40px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-strong);
}

.cover-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.cover-image:hover {
    transform: scale(1.02);
}

.post-content {
    line-height: 1.9;
    font-size: 1.1rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1400px) {
    .container {
        max-width: 100%;
    }
}

@media (max-width: 1024px) {
    .editor-container {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 4px 1fr;
        height: auto;
        min-height: auto;
    }

    .resizer {
        cursor: row-resize;
        height: 4px;
        width: 100%;
    }

    .resizer::before {
        width: 40px;
        height: 4px;
    }

    .editor-panel,
    .preview-panel {
        min-height: 500px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 12px;
    }

    .header {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
        padding: 20px;
        border-radius: 20px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header-controls {
        justify-content: space-between;
    }

    .editor-panel,
    .preview-panel {
        padding: 20px;
        border-radius: 20px;
    }

    .toolbar {
        padding: 10px;
        gap: 6px;
    }

    .toolbar-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }

    .post-title {
        font-size: 2rem;
    }

    .publish-content {
        padding: 24px;
        border-radius: 20px;
    }

    .stats-bar {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.25rem;
    }

    .editor-panel,
    .preview-panel {
        padding: 16px;
    }

    .input-group textarea {
        min-height: 300px;
    }

    .post-title {
        font-size: 1.75rem;
    }

    .publish-content {
        padding: 20px;
    }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 10px;
    border: 2px solid var(--bg-tertiary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.fade-in {
    animation: fadeIn 0.4s ease;
}

.text-center {
    text-align: center;
}

.mt-auto {
    margin-top: auto;
}