@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --font-family: 'Inter', sans-serif;
    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-primary: #212529;
    --color-primary-dark: #1a1e21;
    --color-text: #212529;
    --color-text-muted: #6c757d;
    --color-border: #dee2e6;
    --color-border-muted: #adb5bd;
    --color-error: #dc3545;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --radius: 1rem;
    --transition: all 0.2s ease-in-out;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: clamp(1.875rem, 4vw, 2.25rem);
    --font-size-3xl: clamp(2rem, 5vw, 2.5rem);
    --font-weight-bold: 600;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    --spacing-xxl: 5rem;
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --max-width-content: 48rem;
    --max-width-grid: 72rem;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    background-color: var(--color-bg);
    padding: 1rem 2rem;
    height: 73px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.logo i {
    color: var(--color-primary);
    font-size: 1.75rem;
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    line-height: 1.2;
}

.auth-section {
    display: flex;
    align-items: center;
}

.auth-buttons {
    display: none;
    gap: 0.75rem;
}

.user-menu {
    display: none;
    align-items: center;
    gap: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.user-info i {
    font-size: 1rem;
}

.app-main {
    flex: 1;
    display: flex;
    padding: 0;
    position: relative;
}

.app-main.with-sidebar {
    position: relative;
}

.main-content {
    background-color: var(--color-bg);
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 1rem;
    overflow-wrap: break-word;
}

.main-content-inner {
    width: 832px;
    max-width: 832px;
    min-width: 832px;
}


/* Main form styles */
#postForm {
    width: 800px;
    max-width: 800px;
    min-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Form styles */
.form-group label {
    display: block;
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.form-group {
    margin-bottom: 1.5rem;
    width: 800px;
    max-width: 800px;
    min-width: 800px;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.form-group .textarea-container {
    position: relative;
    width: 800px;
    max-width: 800px;
    min-width: 800px;
    display: flex;
    flex-direction: column;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: border-color 0.2s ease;
}

.form-group .textarea-container:hover {
    border-color: var(--color-border-muted);
}

.form-group .textarea-container:focus-within {
    border-color: var(--color-border-muted);
}

.form-group textarea {
    flex: 1 1 auto;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    padding: 1rem;
    border: none;
    font-family: inherit;
    font-size: 1rem;
    resize: none;
    background: transparent;
    overflow-wrap: break-word;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.form-group textarea:focus {
    outline: none;
}

/* Controls container */
.controls-container {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 0.5rem;
    width: 100%;
}

.char-counter {
    position: absolute;
    left: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    pointer-events: none;
    background-color: transparent;
    padding-left: 0.5rem;
    padding-top: 0.5rem;
    border-radius: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease-in-out, visibility 0.2s ease-in-out;
}

.char-counter.visible {
    opacity: 1;
    visibility: visible;
}

/* Button */
.btn {
    position: static;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 2.5rem;
    height: 2.5rem;
    padding: .5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn .button-text {
    transition: all 0.2s ease;
}

.btn:disabled .button-text {
    color: #b1b1b1;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    transition: background-color 0.2s ease;
}

.btn-primary:hover {
    background-color: #3a3f44;
}

.btn-primary.is-loading {
    background-color: var(--color-text-muted);
}

.login-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: var(--font-size-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.login-btn:hover {
    background-color: #3a3f44;
}

.login-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(33, 37, 41, 0.2);
}

/* Result container */
.result-container {
    margin-top: 1rem;
    padding-top: 0.5rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    text-align: left;
    width: 800px;
    max-width: 800px;
    min-width: 800px;
    overflow-wrap: break-word;
}

#resultPlaceholder {
    width: 100%;
    text-align: left;
}

/* Error message */
#errorMessage {
    color: var(--color-error);
}

#errorMessage i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Result content */
#resultContent {
    position: relative;
    min-height: 150px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.post-preview {
    background-color: var(--color-bg);
    padding: 0;
    text-align: left;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
    flex-grow: 1;
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    font-family: inherit;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow: hidden;
}

/* Pulsing dot animation */
@keyframes pulse {
    0%, 100% { 
        opacity: 0.5;
        transform: scale(0.9);
    }
    50% { 
        opacity: 1;
        transform: scale(1.1);
    }
}

.pulsing-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    background-color: var(--color-primary);
    border-radius: 50%;
    margin-right: 0.5rem;
    animation: pulse 1s infinite ease-in-out;
    vertical-align: middle;
    transform-origin: center;
}

/* Action buttons */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    align-self: flex-start;
}

.action-button {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.action-button:hover {
    color: var(--color-primary-dark);
    background-color: rgba(0, 0, 0, 0.05);
}

.action-button svg {
    width: 16px;
    height: 16px;
    stroke-width: 2;
    transition: transform 0.2s ease;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.auth-form label {
    font-weight: 500;
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.auth-form input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    background-color: var(--color-surface);
    transition: var(--transition);
    box-sizing: border-box;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(33, 37, 41, 0.1);
}

.form-help {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.form-actions {
    margin-top: 0.5rem;
}

.auth-switch {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.auth-switch p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

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

.link-btn:hover {
    color: var(--color-primary-dark);
}

.btn-secondary {
    background-color: var(--color-border);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-text-muted);
    color: white;
}

.auth-buttons-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.auth-submit-btn {
    width: 100%;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.form-help.success {
    color: #28a745;
}

.form-help.error {
    color: var(--color-error);
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 0.75rem;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    margin: 0.5rem 0;
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles for better accessibility */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus,
.action-button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --color-text-muted: #000000;
    }
    
    .action-button:hover {
        background-color: rgba(0, 0, 0, 0.2);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .pulsing-dot {
        animation: none;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .app-main {
        padding: 1rem;
    }
    
    .main-content {
        width: 100%;
        min-width: 320px;
        max-width: 100%;
        padding: 1rem;
    }
    
    #postForm,
    .form-group,
    .form-group .textarea-container,
    .result-container {
        width: 100%;
        min-width: 320px;
        max-width: 100%;
    }
    
    .result-container {
        margin-top: 1.5rem;
        padding-top: 1.5rem;
    }
    
    .action-buttons {
        flex-wrap: wrap;
    }
}

/* Auth Page Styles */
.auth-page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg);
}

.auth-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.auth-card {
    background-color: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    width: 100%;
    max-width: 28rem;
}

.auth-card-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-card-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.auth-card-header p {
    color: var(--color-text-muted);
    font-size: var(--font-size-md);
}

.auth-form .form-group {
    margin-bottom: var(--spacing-lg);
    width: 100%;
    max-width: 100%;
    min-width: auto;
}

.auth-form label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.auth-form input[type="email"],
.auth-form input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-md);
    transition: var(--transition);
    background-color: var(--color-surface);
    box-sizing: border-box;
}

.auth-form input[type="email"]:focus,
.auth-form input[type="password"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(33, 37, 41, 0.1);
}

.auth-form input[type="email"]:disabled,
.auth-form input[type="password"]:disabled {
    background-color: var(--color-bg);
    opacity: 0.7;
    cursor: not-allowed;
}

.auth-submit-btn {
    width: 100%;
    margin-bottom: var(--spacing-lg);
}

.auth-footer {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.auth-footer p {
    margin-bottom: var(--spacing-sm);
}

.auth-footer p:last-child {
    margin-bottom: 0;
}

.auth-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.auth-link:hover {
    text-decoration: underline;
}

/* Responsive auth pages */
@media (max-width: 768px) {
    .auth-main {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .auth-card {
        padding: var(--spacing-lg);
    }
    
    .auth-card-header h2 {
        font-size: var(--font-size-xl);
    }
}

/* ===== SIDEBAR STYLES ===== */

/* Disable transitions during initialization to prevent visual flashing */
.sidebar-initializing,
.sidebar-initializing .main-content {
    transition: none !important;
}

.mobile-sidebar-toggle {
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-md);
    transition: var(--transition);
}

.mobile-sidebar-toggle:hover {
    background-color: var(--color-border);
}

.history-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 320px;
    height: 100vh;
    background-color: var(--color-bg);
    border-right: 1px solid var(--color-border);
    z-index: 100;
    transform: translateX(0);
    transition: width var(--transition);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.history-sidebar.collapsed {
    width: 60px;
}

.history-sidebar.mobile-hidden {
    transform: translateX(-100%);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.5rem;
    padding: 1rem;
    background-color: var(--color-bg);
    height: 73px;
    min-height: 73px;
    max-height: 73px;
    flex-shrink: 0;
    position: relative;
}

.sidebar-header svg {
    width: 24px !important;
    height: 24px !important;
    stroke: var(--color-primary) !important;
    stroke-width: 2 !important;
    stroke-linecap: round !important;
    stroke-linejoin: round !important;
    fill: none !important;
    position: absolute;
    left: 18px;
    flex-shrink: 0;
}

.sidebar-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    transition: opacity var(--transition);
    margin-left: 36px;
}

.history-sidebar.collapsed .sidebar-header {
    height: 73px;
    min-height: 73px;
    max-height: 73px;
    padding: 1rem 0.5rem;
    justify-content: center;
}

.history-sidebar.collapsed .sidebar-title {
    display: none;
}

.history-sidebar.collapsed .history-title {
    display: none;
}


.sidebar-toggle {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: color var(--transition), background-color var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
}

.sidebar-toggle:hover {
    color: var(--color-text);
    background-color: var(--color-border);
}


.history-sidebar.collapsed .sidebar-toggle {
    transform: translateX(-50%) translateY(-50%);
}

.sidebar-content {
    height: calc(100vh - 73px - 60px); /* Subtract header and footer height */
    overflow-y: auto;
    padding: 1rem;
    flex: 1;
}

.history-sidebar.collapsed .sidebar-content {
    padding: 0.5rem;
}

.sidebar-footer {
    padding: 0;
    position: relative;
    background-color: var(--color-bg);
    height: 60px;
    min-height: 60px;
    max-height: 60px;
    flex-shrink: 0;
}

.history-sidebar.collapsed .sidebar-footer {
    padding: 0;
    height: 60px;
    min-height: 60px;
    max-height: 60px;
}

.sidebar-history-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* History main header styles - match sidebar-header layout */
.history-header {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    background-color: var(--color-bg);
    height: 50px;
    min-height: 50px;
    max-height: 50px;
    flex-shrink: 0;
    position: relative;
}


.history-header .history-title {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
}

/* Collapsed sidebar - hide all text elements and keep icons fixed */
.history-sidebar.collapsed .history-header {
    height: 50px;
    min-height: 50px;
    max-height: 50px;
    padding: 1rem 0.5rem;
    justify-content: center;
}

.history-sidebar.collapsed .sidebar-history-group-header {
    display: none;
}

.history-sidebar.collapsed .sidebar-history-item {
    display: none;
}


/* Group header styles */
.sidebar-history-group-header {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    position: sticky;
    top: 0;
    background-color: var(--color-bg);
    z-index: 1;
}

.sidebar-history-group-header:first-child {
    margin-top: 0;
}

/* Collapsed sidebar group headers */
.history-sidebar.collapsed .sidebar-history-group-header {
    font-size: var(--font-size-sm);
    text-align: center;
    margin-top: 0.5rem;
    margin-bottom: 0.25rem;
    padding: 0.25rem 0;
}

.sidebar-history-item {
    border-radius: var(--border-radius-md);
    padding: 0.25rem;
    transition: all 0.2s ease;
    cursor: pointer;
    background-color: var(--color-bg);
}

.history-sidebar.collapsed .sidebar-history-item {
    padding: 0.5rem;
    text-align: center;
}

.sidebar-history-item:hover {
    background-color: var(--color-surface);
}

.sidebar-history-item:focus {
    outline: 2px solid var(--color-text-muted);
    outline-offset: 2px;
}

.sidebar-history-item-sentence {
    font-size: var(--font-size-sm);
    line-height: 1.4;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: opacity var(--transition);
}

.sidebar-history-item-post {
    font-size: var(--font-size-sm);
    line-height: 1.4;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    transition: opacity var(--transition);
}

.history-sidebar.collapsed .sidebar-history-item-sentence {
    font-size: 0.75rem;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    text-align: center;
}

.history-sidebar.collapsed .sidebar-history-item-post {
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
}

.sidebar-history-empty {
    text-align: center;
    color: var(--color-text-muted);
    padding: 2rem 1rem;
    font-style: italic;
    font-size: var(--font-size-sm);
}

.history-sidebar.collapsed .sidebar-history-empty {
    padding: 1rem 0.5rem;
    font-size: 0.75rem;
}

/* Desktop Sidebar - Hide mobile toggle on large screens */
@media (min-width: 1025px) {
    .mobile-sidebar-toggle {
        display: none !important;
    }
    
    /* Always reserve space for sidebar on desktop to prevent layout shift */
    .main-content {
        margin-left: 320px;
        transition: margin-left 0.2s;
    }
    
    /* When sidebar is collapsed, reduce margin */
    .app-main.sidebar-collapsed .main-content {
        margin-left: 60px;
    }
}

/* Responsive Sidebar */
@media (max-width: 1024px) {
    .history-sidebar {
        transform: translateX(-100%);
        z-index: 1000;
    }
    
    .history-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .mobile-sidebar-toggle {
        display: block !important;
    }
    
    /* Overlay when mobile sidebar is open */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;
        display: none;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
}

@media (max-width: 768px) {
    .history-sidebar {
        width: 280px;
    }
}