/* Modern CSS Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Variables */
:root {
    --bg-primary: #0f1116;
    --bg-secondary: #1a1d23;
    --bg-tertiary: #22252d;
    --accent-blue: #2563eb;
    --accent-orange: #f97316;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --border-color: #2d3139;
    --shadow-color: rgba(0, 0, 0, 0.2);
}

/* Typography */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

/* Layout */
.app-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.logo .material-icons {
    font-size: 1.75rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.file-input-wrapper {
    margin-bottom: 1rem;
}

.upload-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-orange));
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upload-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.upload-btn input[type="file"] {
    display: none;
}

/* Tools Section */
.tools-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tools-header {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.tool-button {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background-color: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.tool-button:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.tool-button.active {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.color-picker {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.color-picker label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.color-picker input[type="color"] {
    width: 100%;
    height: 40px;
    border: none;
    border-radius: 8px;
    background-color: var(--bg-tertiary);
    cursor: pointer;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    height: 100vh;
    overflow: hidden;
}

/* Top Bar */
.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.page-controls,
.document-controls,
.action-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Buttons */
.icon-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-button:hover {
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

.primary-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-orange));
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
}

.primary-button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.secondary-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.secondary-button:hover {
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

/* Quality Select */
.quality-select {
    padding: 0.75rem 1rem;
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

/* PDF Container */
.pdf-container {
    height: calc(100vh - 72px); /* Subtract top bar height */
    padding: 2rem;
    overflow: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    min-width: min-content;
    width: 100%;
}

.page-container {
    position: relative;
    background-color: white;
    box-shadow: 0 4px 6px var(--shadow-color);
    border-radius: 8px;
    overflow: hidden;
    width: fit-content;
    height: fit-content;
    flex-shrink: 0;
}

.page-container.current-page {
    outline: 2px solid var(--accent-blue);
}

.page-canvas,
.markup-layer {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
}

.page-number {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
}

/* Signature Pad */
.signature-pad {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 8px 16px var(--shadow-color);
    display: none;
    z-index: 1000;
    width: 450px; /* Added explicit width */
}

.signature-pad.active {
    display: block !important; /* Force display when active */
}

#signatureCanvas {
    background-color: white;
    border-radius: 8px;
    margin-bottom: 1rem;
    cursor: crosshair; /* Better cursor for drawing */
    width: 400px; /* Match canvas element width */
    height: 200px; /* Match canvas element height */
    touch-action: none; /* Prevent scrolling while drawing */
    display: block; /* Ensure canvas is block-level */
}

.signature-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.signature-controls {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Tooltips */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 8px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s;
    pointer-events: none;
    z-index: 1000;
}

[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.2s 1s;
}

/* Markup Controls */
.markup-delete {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 24px;
    height: 24px;
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 1000;
    transform: translate(0, 0);
}

.markup-delete:hover {
    color: #ef4444;
    background-color: var(--bg-primary);
    transform: scale(1.1);
}

.markup-delete .material-icons {
    font-size: 16px;
}

/* Search Bar */
.search-bar {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    z-index: 1000;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.search-bar.active {
    display: flex;
}

.search-input {
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: 4px;
    color: var(--text-primary);
    padding: 4px 8px;
    width: 200px;
    font-size: 14px;
}

.search-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-blue);
}

.search-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.search-count {
    color: var(--text-secondary);
    font-size: 12px;
    margin: 0 8px;
}

/* Disabled States */
button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background-color: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background-color: var(--bg-tertiary);
    border-radius: 4px;
}

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