/* ============================================
   THEME VARIABLES
   ============================================ */
:root {
    /* Light Theme - Purple, White, Green, Orange Mix */
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-editor: #ffffff;
    --bg-toolbar: #f8f9fa;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-inverse: #ffffff;
    --border-color: #e1e8ed;
    --accent-primary: #8e44ad;
    --accent-secondary: #e67e22;
    --accent-hover: #27ae60;
    --success: #27ae60;
    --info: #3498db;
    --warning: #f39c12;
    --danger: #e74c3c;
    --shadow: rgba(0, 0, 0, 0.1);
    --hover-bg: #f0f0f0;
    --gradient-primary: linear-gradient(135deg, #8e44ad 0%, #e67e22 100%);
    --gradient-bg: linear-gradient(135deg, #f5f5f5 0%, #ffffff 100%);
}

[data-theme="dark"] {
    /* Dark Theme - Black and Dark Blue Mix */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a2e;
    --bg-card: #161625;
    --bg-editor: #1e1e35;
    --bg-toolbar: #161625;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --text-inverse: #0a0a0a;
    --border-color: #2a2a40;
    --accent-primary: #4a90e2;
    --accent-secondary: #e67e22;
    --accent-hover: #357abd;
    --success: #2ecc71;
    --info: #3498db;
    --warning: #f39c12;
    --danger: #e74c3c;
    --shadow: rgba(0, 0, 0, 0.5);
    --hover-bg: #1e1e35;
    --gradient-primary: linear-gradient(135deg, #1a1a2e 0%, #4a90e2 100%);
    --gradient-bg: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 100%);
}

/* ============================================
   GLOBAL STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--gradient-bg);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: 20px;
    box-shadow: 0 20px 60px var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

/* ============================================
   HEADER
   ============================================ */
header {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    padding: 30px;
    text-align: center;
    position: relative;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1em;
    opacity: 0.95;
}

.auth-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 15px;
}

/* ============================================
   THEME TOGGLE
   ============================================ */
.theme-toggle-wrapper {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
}

.theme-toggle {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    padding: 10px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    box-shadow: 0 4px 15px var(--shadow);
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px var(--shadow);
}

/* ============================================
   MODALS
   ============================================ */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    overflow-y: auto;
}

.modal-content {
    background-color: var(--bg-card);
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 10px 40px var(--shadow);
}

.close {
    position: absolute;
    right: 20px;
    top: 10px;
    font-size: 30px;
    cursor: pointer;
    color: var(--text-secondary);
    z-index: 10;
}

.close:hover {
    color: var(--text-primary);
}

/* ============================================
   FORMS
   ============================================ */
form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin: 20px 0;
}

input {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px;
    width: 100%;
}

input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    display: block;
    margin-bottom: 30px;
    animation: fadeIn 0.5s ease-in;
}

.section[style*="display: none"] {
    display: none !important;
}

.section[style*="display: block"] {
    display: block !important;
}

.section h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent-primary);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-content {
    padding: 30px;
}

/* ============================================
   UPLOAD AREAS
   ============================================ */
.upload-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.upload-area {
    border: 3px dashed var(--accent-primary);
    border-radius: 15px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    background: var(--bg-secondary);
    transition: all 0.3s ease;
}

.upload-area:hover {
    background: var(--hover-bg);
    border-color: var(--accent-secondary);
}

.upload-area.dragover {
    background: var(--hover-bg);
    border-color: var(--success);
}

.upload-icon {
    font-size: 4em;
    margin-bottom: 20px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    background: var(--accent-primary);
    color: var(--text-inverse);
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow);
}

.btn-primary {
    background: var(--success);
    color: white;
}

.btn-secondary {
    background: var(--info);
    color: white;
}

.btn-success {
    background: var(--warning);
    color: white;
}

.btn-expert {
    background: var(--danger);
    color: white;
}

.btn-small {
    padding: 8px 15px;
    font-size: 0.9em;
}

/* ============================================
   EDITOR TOOLBAR
   ============================================ */
.editor-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: var(--bg-toolbar);
    border-radius: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    border: 1px solid var(--border-color);
}

.toolbar-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

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

.toolbar-select {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    background: var(--bg-card);
    color: var(--text-primary);
}

/* ============================================
   EDITOR AREA
   ============================================ */
.editor-area {
    min-height: 600px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    background: var(--bg-editor);
    overflow-y: auto;
    line-height: 1.6;
    font-size: 16px;
    color: var(--text-primary);
    visibility: visible;
    opacity: 1;
}

.editor-area:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.editor-area table {
    border-collapse: collapse;
    width: 100%;
    margin: 10px 0;
}

.editor-area table td,
.editor-area table th {
    border: 1px solid var(--border-color);
    padding: 8px;
}

/* ============================================
   PDF PAGE RENDERING
   ============================================ */
.pdf-page {
    position: relative;
    background: white;
    padding: 0;
    margin-bottom: 20px;
    border: 1px solid #eee;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: visible;
}

.pdf-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.pdf-text-layer {
    position: relative;
    z-index: 2;
    pointer-events: auto;
}

.text-overlay {
    position: relative;
    pointer-events: auto;
}

/* ============================================
   EDITABLE TEXT ELEMENTS
   ============================================ */
.editable-text {
    transition: all 0.2s ease;
    cursor: text;
    padding: 2px 4px;
    border-radius: 3px;
    line-height: 1.2;
    pointer-events: auto;
    z-index: 10;
}

.editable-text:hover {
    background-color: rgba(74, 144, 226, 0.1) !important;
    border: 1px dashed #4a90e2 !important;
}

.editable-text:focus {
    background-color: rgba(74, 144, 226, 0.2) !important;
    border: 1px solid #4a90e2 !important;
    outline: none;
}

.pdf-text-block {
    position: absolute;
    transition: all 0.2s ease;
    cursor: text;
    pointer-events: auto;
    z-index: 3;
}

.pdf-text-block:hover {
    background-color: rgba(74, 144, 226, 0.1) !important;
    border: 1px dashed #4a90e2 !important;
}

.pdf-text-block:focus {
    background-color: rgba(74, 144, 226, 0.15) !important;
    border: 1px solid #4a90e2 !important;
    outline: none;
}

/* Preserve original PDF text styling */
.pdf-page .editable-text,
.pdf-page .pdf-text-block {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

/* ============================================
   TABLE EDITING
   ============================================ */
.editable-table {
    border-collapse: collapse;
    background-color: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.pdf-editable-table {
    border-collapse: collapse;
    background: white;
    z-index: 10;
}

.table-cell-editable {
    border: 1px solid #999;
    padding: 8px;
    cursor: text;
    transition: all 0.2s ease;
}

.table-cell-editable:hover {
    background-color: rgba(74, 144, 226, 0.1) !important;
}

.table-cell-editable:focus {
    background-color: rgba(74, 144, 226, 0.15) !important;
    outline: 2px solid #4a90e2;
}

/* ============================================
   PRICING PLANS
   ============================================ */
.pricing-plans {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.plan {
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    background: var(--bg-secondary);
    transition: all 0.3s ease;
}

.plan:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
}

.plan h3 {
    margin-bottom: 10px;
}

.plan p {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--accent-primary);
    margin: 10px 0;
}

/* ============================================
   DOWNLOAD OPTIONS
   ============================================ */
.download-options {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   AD SPACE
   ============================================ */
.ad-space {
    padding: 20px;
    text-align: center;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

/* ============================================
   LOADING OVERLAY
   ============================================ */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.loading p {
    color: white;
    margin-top: 20px;
    font-size: 1.2em;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid var(--bg-secondary);
    border-top: 5px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   SCROLLBAR
   ============================================ */
.editor-area::-webkit-scrollbar {
    width: 10px;
}

.editor-area::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.editor-area::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 5px;
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .upload-options {
        grid-template-columns: 1fr;
    }
    
    .auth-buttons {
        position: static;
        margin-top: 20px;
    }
    
    .editor-toolbar {
        gap: 5px;
    }
    
    .theme-toggle-wrapper {
        top: 10px;
        left: 10px;
    }
    
    .theme-toggle {
        padding: 8px 15px;
        font-size: 0.9em;
    }
    
    .modal-content {
        width: 95%;
        margin: 5% auto;
        padding: 20px;
    }
}
/* ============================================
   TASK 1: FIX DOCUMENT LAYOUT - PAGINATED SHEETS
   ============================================ */
.document-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    padding: 30px 20px;
    background: var(--bg-toolbar);
    min-height: 100vh;
}

.document-page {
    width: 794px;
    max-width: 100%;
    min-height: 1123px;
    background: #ffffff;
    margin: 0 auto;
    padding: 60px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

/* Responsive scaling for smaller screens */
@media (max-width: 850px) {
    .document-page {
        width: 100%;
        min-height: auto;
        aspect-ratio: 1 / 1.414;
        padding: 30px;
    }
}

/* Page break indicator */
.page-break {
    width: 100%;
    height: 2px;
    background: var(--border-color);
    margin: 20px 0;
    position: relative;
}

.page-break::after {
    content: 'Page Break';
    position: absolute;
    left: 50%;
    top: -12px;
    transform: translateX(-50%);
    background: var(--bg-toolbar);
    padding: 0 10px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* ============================================
   TASK 2: INLINE EDITING STYLES
   ============================================ */
[contenteditable="true"] {
    cursor: text;
    transition: all 0.2s ease;
    border-radius: 3px;
}

[contenteditable="true"]:hover {
    background-color: rgba(74, 144, 226, 0.08);
    outline: 1px dashed #4a90e2;
}

[contenteditable="true"]:focus {
    background-color: rgba(74, 144, 226, 0.15);
    outline: 2px solid #4a90e2;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

/* Editable text block */
.editable-text-block {
    position: relative;
    min-height: 20px;
    min-width: 30px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Table editing */
.editable-table {
    border-collapse: collapse;
    width: 100%;
    margin: 10px 0;
}

.editable-table td,
.editable-table th {
    border: 1px solid #999;
    padding: 8px;
    min-width: 50px;
    background: white;
}

.editable-table td[contenteditable="true"]:hover,
.editable-table th[contenteditable="true"]:hover {
    background-color: rgba(74, 144, 226, 0.08);
    outline: 1px dashed #4a90e2;
}

/* ============================================
   TASK 3: GOOGLE SIGN-IN BUTTON
   ============================================ */
.google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 12px 20px;
    background: #ffffff;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: #333;
    transition: all 0.3s ease;
    margin: 10px 0;
}

.google-btn:hover {
    background: #f8f9fa;
    border-color: #4285f4;
    box-shadow: 0 2px 8px rgba(66, 133, 244, 0.2);
}

.google-btn img {
    width: 20px;
    height: 20px;
}

.google-btn .google-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Divider */
.auth-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 20px 0;
    color: var(--text-secondary);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.auth-divider span {
    padding: 0 10px;
    font-size: 14px;
}

/* ============================================
   TASK 4: SESSION LOADING STATE
   ============================================ */
.auth-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-primary);
}

.auth-loading .spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.auth-loading p {
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 16px;
}

/* User avatar in header */
.user-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-primary);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================
   UNDO/REDO BUTTONS
   ============================================ */
.toolbar-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   DARK MODE ADJUSTMENTS FOR DOCUMENT PAGES
   ============================================ */
[data-theme="dark"] .document-page {
    background: #ffffff;
    color: #333;
}
/* Document container and pages */
.document-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 20px;
}

.document-page {
    width: 794px;
    max-width: 100%;
    min-height: 1123px;
    background: white;
    margin: 0 auto;
    padding: 40px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    position: relative;
    overflow: visible;
}

/* Editable text blocks */
.pdf-text-block {
    transition: all 0.2s ease;
    cursor: text;
    padding: 2px;
    border-radius: 3px;
    line-height: 1.2;
}

.pdf-text-block:hover {
    background-color: rgba(74, 144, 226, 0.1) !important;
    border: 1px dashed #4a90e2 !important;
}

.pdf-text-block:focus {
    background-color: rgba(74, 144, 226, 0.2) !important;
    border: 1px solid #4a90e2 !important;
    outline: none;
}

/* Page break */
.page-break {
    width: 100%;
    height: 2px;
    background: #ccc;
    margin: 20px 0;
}

/* Tables */
.editable-table {
    border-collapse: collapse;
    width: 100%;
    background: white;
}

.editable-table td,
.editable-table th {
    border: 1px solid #999;
    padding: 8px;
    min-width: 50px;
}

/* Responsive */
@media (max-width: 850px) {
    .document-page {
        width: 100%;
        min-height: auto;
        padding: 20px;
    }
}

[data-theme="dark"] .editable-table td,
[data-theme="dark"] .editable-table th {
    background: #ffffff;
    color: #333;
}