/* ===================================
   CSS Variables & Reset
   =================================== */

:root {
    /* Color Palette - Literary Journal */
    --color-paper: #f5f1e8;
    --color-paper-dark: #ebe6dc;
    --color-parchment: #faf8f3;

    --color-text: #2d2520;
    --color-text-muted: #6b5d52;
    --color-text-light: #9b8d7f;

    --color-accent: #8b7355;
    --color-accent-dark: #6d5a43;
    --color-accent-light: #a68968;

    --color-gold: #b8936e;
    --color-bronze: #8b6f47;

    --color-border: #d4cfc4;
    --color-border-light: #e8e4da;

    --color-success: #7a9b76;
    --color-error: #a86c5f;

    /* Typography */
    --font-display: 'Lora', Georgia, serif;
    --font-serif: 'Crimson Text', 'Source Serif 4', Georgia, serif;
    --font-mono: 'Inconsolata', 'Courier New', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(45, 37, 32, 0.06);
    --shadow-md: 0 4px 8px rgba(45, 37, 32, 0.08);
    --shadow-lg: 0 8px 16px rgba(45, 37, 32, 0.1);

    /* Transitions */
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
}

body {
    font-family: var(--font-serif);
    background: var(--color-paper);
    color: var(--color-text);
    line-height: 1.7;
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;

    /* Subtle paper texture */
    background-image:
        repeating-linear-gradient(
            0deg,
            rgba(139, 115, 85, 0.02) 0px,
            transparent 1px,
            transparent 2px,
            rgba(139, 115, 85, 0.02) 3px
        ),
        repeating-linear-gradient(
            90deg,
            rgba(139, 115, 85, 0.02) 0px,
            transparent 1px,
            transparent 2px,
            rgba(139, 115, 85, 0.02) 3px
        );
}

.container-fluid {
    max-width: 100%;
    padding: 0 var(--spacing-lg);
}

/* ===================================
   Header
   =================================== */

.header {
    background: var(--color-parchment);
    border-bottom: 2px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.brand-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-gold));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-parchment);
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
}

.brand-text h1 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 400;
    font-style: italic;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Word Count */
.word-count {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    background: var(--color-paper-dark);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.count-label {
    font-weight: 500;
}

.count-value {
    font-weight: 600;
    color: var(--color-accent);
}

.count-sep {
    color: var(--color-border);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-serif);
    font-size: 0.9375rem;
    font-weight: 600;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-parchment);
}

.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.btn-secondary {
    background: var(--color-paper-dark);
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: var(--color-parchment);
    border-color: var(--color-accent);
}

.btn-ghost {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text-muted);
}

.btn-ghost:hover {
    background: var(--color-paper-dark);
    border-color: var(--color-accent);
    color: var(--color-text);
}

/* ===================================
   Toolbar
   =================================== */

.toolbar {
    background: var(--color-parchment);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--spacing-sm) 0;
}

.toolbar-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toolbar-group {
    display: flex;
    gap: 2px;
}

.tool-btn {
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.tool-btn:hover {
    background: var(--color-paper-dark);
    border-color: var(--color-border);
    color: var(--color-accent);
}

.tool-btn:active {
    background: var(--color-paper);
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--color-border);
    margin: 0 var(--spacing-xs);
}

.toolbar-spacer {
    flex: 1;
}

.toolbar-info {
    display: flex;
    align-items: center;
}

.auto-save-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8125rem;
    color: var(--color-success);
    font-style: italic;
}

.auto-save-indicator i {
    font-size: 0.75rem;
}

.auto-save-indicator.saving {
    color: var(--color-text-light);
}

/* ===================================
   Main Editor
   =================================== */

.main {
    flex: 1;
    overflow: hidden;
}

.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    height: 100%;
    background: var(--color-paper-dark);
}

/* Panes */
.editor-pane,
.preview-pane {
    display: flex;
    flex-direction: column;
    background: var(--color-parchment);
    border-right: 1px solid var(--color-border);
    overflow: hidden;
}

.preview-pane {
    border-right: none;
}

.pane-header {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-paper-dark);
    border-bottom: 1px solid var(--color-border);
}

.pane-title {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    letter-spacing: 0.5px;
}

.pane-title i {
    color: var(--color-accent);
    font-size: 0.875rem;
}

.pane-body {
    flex: 1;
    overflow: auto;
    position: relative;
}

/* Markdown Textarea */
.markdown-textarea {
    width: 100%;
    height: 100%;
    padding: var(--spacing-xl);
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.8;
    background: var(--color-parchment);
    border: none;
    color: var(--color-text);
    resize: none;
    outline: none;
    tab-size: 4;
}

.markdown-textarea::placeholder {
    color: var(--color-text-light);
    opacity: 0.7;
    line-height: 1.8;
}

/* Preview */
.markdown-preview {
    padding: var(--spacing-xl);
    min-height: 100%;
    font-family: var(--font-serif);
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-text);
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    text-align: center;
    color: var(--color-text-light);
}

.preview-placeholder i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
    opacity: 0.3;
}

.preview-placeholder p {
    font-size: 1rem;
    font-style: italic;
}

/* Markdown Preview Styles */
.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3,
.markdown-preview h4,
.markdown-preview h5,
.markdown-preview h6 {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-text);
    margin-top: 1.5em;
    margin-bottom: 0.75em;
    line-height: 1.3;
}

.markdown-preview h1 {
    font-size: 2.25rem;
    border-bottom: 3px solid var(--color-accent);
    padding-bottom: 0.5rem;
}

.markdown-preview h2 {
    font-size: 1.875rem;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0.4rem;
}

.markdown-preview h3 {
    font-size: 1.5rem;
}

.markdown-preview h4 {
    font-size: 1.25rem;
}

.markdown-preview h5,
.markdown-preview h6 {
    font-size: 1.0625rem;
}

.markdown-preview p {
    margin-bottom: 1.25em;
}

.markdown-preview strong {
    font-weight: 700;
    color: var(--color-text);
}

.markdown-preview em {
    font-style: italic;
}

.markdown-preview a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color var(--transition);
}

.markdown-preview a:hover {
    color: var(--color-accent-dark);
}

.markdown-preview ul,
.markdown-preview ol {
    margin: 1.25em 0;
    padding-left: 2em;
}

.markdown-preview li {
    margin-bottom: 0.5em;
}

.markdown-preview blockquote {
    margin: 1.5em 0;
    padding: 1em 1.5em;
    background: var(--color-paper-dark);
    border-left: 4px solid var(--color-accent);
    font-style: italic;
    color: var(--color-text-muted);
}

.markdown-preview code {
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    background: var(--color-paper-dark);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    color: var(--color-accent-dark);
}

.markdown-preview pre {
    margin: 1.5em 0;
    padding: 1.25em;
    background: var(--color-paper-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.markdown-preview pre code {
    background: none;
    padding: 0;
    color: var(--color-text);
    font-size: 0.875rem;
    line-height: 1.6;
}

.markdown-preview img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    margin: 1.5em 0;
    box-shadow: var(--shadow-md);
}

.markdown-preview hr {
    margin: 2em 0;
    border: none;
    height: 2px;
    background: linear-gradient(
        to right,
        transparent,
        var(--color-border),
        transparent
    );
}

.markdown-preview table {
    width: 100%;
    margin: 1.5em 0;
    border-collapse: collapse;
}

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

.markdown-preview th {
    background: var(--color-paper-dark);
    font-weight: 700;
    color: var(--color-text);
}

.markdown-preview td {
    background: var(--color-parchment);
}

/* ===================================
   Toast
   =================================== */

.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(150%);
    background: var(--color-parchment);
    color: var(--color-text);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-accent);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    z-index: 1000;
    transition: transform var(--transition);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast i {
    color: var(--color-success);
    font-size: 1.125rem;
}

.toast.error {
    border-color: var(--color-error);
}

.toast.error i {
    color: var(--color-error);
}

/* ===================================
   Scrollbar
   =================================== */

::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--color-paper-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 6px;
    border: 3px solid var(--color-paper-dark);
}

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

/* ===================================
   Responsive
   =================================== */

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

    .editor-pane {
        border-bottom: 1px solid var(--color-border);
        border-right: none;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: stretch;
    }

    .brand {
        justify-content: center;
    }

    .header-actions {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .word-count {
        justify-content: center;
    }

    .action-buttons {
        justify-content: center;
    }

    .toolbar-content {
        flex-wrap: wrap;
    }

    .toolbar-spacer {
        display: none;
    }

    .toolbar-info {
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-xs);
    }

    .brand-text h1 {
        font-size: 1.25rem;
    }
}

@media (max-width: 640px) {
    .markdown-textarea,
    .markdown-preview {
        padding: var(--spacing-lg);
    }

    .markdown-preview h1 {
        font-size: 1.75rem;
    }

    .markdown-preview h2 {
        font-size: 1.5rem;
    }

    .markdown-preview h3 {
        font-size: 1.25rem;
    }
}

/* ===================================
   Utilities
   =================================== */

.hidden {
    display: none !important;
}

/* Selection */
::selection {
    background: var(--color-gold);
    color: var(--color-parchment);
}

::-moz-selection {
    background: var(--color-gold);
    color: var(--color-parchment);
}