/* =====================================================
   PhotoLite - Core Styles
   Unified Dark Premium Theme (matching Web-Tools homepage)
   ===================================================== */

@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600&display=swap");

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Background - Dark Wood Theme */
    --bg-dark: #0a0a0a;
    --bg-primary: radial-gradient(circle at center, #1a1a1a 0%, #0a0a0a 100%);
    --bg-solid: #0a0a0a;
    
    /* Panel Backgrounds - Glassmorphism */
    --wood-black: #121212;
    --wood-gray: #2c2c2c;
    --panel-bg: rgba(30, 30, 30, 0.6);
    --panel-bg-solid: #1e1e1e;
    --panel-border: rgba(255, 255, 255, 0.05);
    --panel-hover: rgba(255, 255, 255, 0.05);
    --card-bg: rgba(30, 30, 30, 0.6);
    
    /* Canvas Area */
    --canvas-bg: #0d0d0d;
    --canvas-pattern: #1a1a1a;
    
    /* Accent Colors - Subtle white/gray instead of purple */
    --accent-primary: #ffffff;
    --accent-hover: #e0e0e0;
    --accent-active: #cccccc;
    --accent-success: #4ade80;
    --accent-warning: #fbbf24;
    --accent-danger: #f87171;
    --accent-glow: rgba(255, 255, 255, 0.05);
    
    /* Text Hierarchy */
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --text-disabled: #444444;
    
    /* Glassmorphism */
    --glass-blur: blur(12px);
    --glass-border: 1px solid rgba(255, 255, 255, 0.05);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(255, 255, 255, 0.1);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    
    /* Layout */
    --header-height: 52px;
    --toolbar-width: 56px;
    --panel-width: 280px;
    --status-height: 28px;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
    line-height: 1.5;
    position: relative;
}

/* Wood Grain Effect Overlay */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        90deg,
        transparent 0,
        transparent 2px,
        rgba(0, 0, 0, 0.1) 2px,
        rgba(0, 0, 0, 0.1) 4px
    ),
    linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 50%, #0a0a0a 100%);
    opacity: 0.3;
    z-index: -1;
    pointer-events: none;
}

/* Selection */
::selection {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

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

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* Header Bar */
.header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--spacing-lg);
    background: var(--panel-bg);
    backdrop-filter: var(--glass-blur);
    border-bottom: var(--glass-border);
    z-index: 100;
}

.header-left,
.header-center,
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
    padding-right: var(--spacing-lg);
    border-right: 1px solid var(--panel-border);
    margin-right: var(--spacing-sm);
}

.logo svg {
    stroke: var(--text-primary);
}

.file-menu {
    display: flex;
    gap: var(--spacing-xs);
}

.menu-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.menu-btn:hover {
    background: var(--panel-hover);
    color: var(--text-primary);
}

.menu-btn svg {
    stroke: currentColor;
}

/* Icon Buttons */
.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover:not(:disabled) {
    background: var(--panel-hover);
    color: var(--text-primary);
}

.icon-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.icon-btn svg {
    stroke: currentColor;
}

/* History Controls */
.history-controls {
    display: flex;
    gap: var(--spacing-xs);
    padding: 0 var(--spacing-md);
    border-left: 1px solid var(--panel-border);
    border-right: 1px solid var(--panel-border);
}

/* Zoom Controls */
.zoom-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding-right: var(--spacing-md);
    border-right: 1px solid var(--panel-border);
}

.zoom-level {
    min-width: 50px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Export Button */
.btn-export {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: white;
    border: none;
    color: black;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.btn-export:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-export svg {
    stroke: currentColor;
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Canvas Area */
.canvas-area {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--canvas-bg);
    overflow: hidden;
    
    /* Checkerboard pattern for transparency */
    background-image: 
        linear-gradient(45deg, var(--canvas-pattern) 25%, transparent 25%),
        linear-gradient(-45deg, var(--canvas-pattern) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--canvas-pattern) 75%),
        linear-gradient(-45deg, transparent 75%, var(--canvas-pattern) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.canvas-wrapper {
    position: relative;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background-image: 
        linear-gradient(45deg, #404040 25%, transparent 25%),
        linear-gradient(-45deg, #404040 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #404040 75%),
        linear-gradient(-45deg, transparent 75%, #404040 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    background-color: #2a2a2a;
}

.canvas-wrapper .canvas-container {
    background-image: 
        linear-gradient(45deg, #404040 25%, transparent 25%),
        linear-gradient(-45deg, #404040 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #404040 75%),
        linear-gradient(-45deg, transparent 75%, #404040 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    background-color: #2a2a2a;
}

#main-canvas {
    display: block;
    background: transparent !important;
}

.canvas-container canvas {
    background: transparent !important;
}

/* Drop Zone */
.drop-zone {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 10, 10, 0.95);
    opacity: 1;
    transition: opacity var(--transition-normal);
    z-index: 50;
    cursor: pointer;
}

.drop-zone.hidden {
    opacity: 0;
    pointer-events: none;
}

.drop-zone.drag-over {
    background: rgba(255, 255, 255, 0.05);
}

.drop-zone.drag-over .drop-zone-content {
    transform: scale(1.05);
    border-color: rgba(255, 255, 255, 0.3);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl) 60px;
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.drop-zone-content svg {
    stroke: var(--text-muted);
    transition: stroke var(--transition-normal);
}

.drop-zone.drag-over .drop-zone-content svg {
    stroke: var(--text-primary);
}

.drop-zone-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.drop-zone-content p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Status Bar */
.status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--status-height);
    padding: 0 var(--spacing-lg);
    background: var(--panel-bg-solid);
    border-top: var(--glass-border);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.status-left,
.status-center,
.status-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 100%;
    max-width: 400px;
    background: var(--panel-bg-solid);
    border-radius: var(--radius-xl);
    border: var(--glass-border);
    box-shadow: var(--shadow-lg);
    transform: scale(0.95) translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--panel-border);
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.modal-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--panel-border);
}

/* Export Options */
.export-option {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.export-option label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.export-option select,
.export-option input[type="text"],
.export-option input[type="number"] {
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.export-option select:focus,
.export-option input[type="text"]:focus,
.export-option input[type="number"]:focus {
    border-color: rgba(255, 255, 255, 0.3);
}

.export-option input[type="range"] {
    width: 100%;
    accent-color: white;
}

/* Buttons */
.btn-primary {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: white;
    border: none;
    color: black;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--panel-border);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background: var(--panel-hover);
    color: var(--text-primary);
}

.btn-reset {
    width: 100%;
    padding: var(--spacing-sm);
    margin-top: var(--spacing-md);
    background: transparent;
    border: 1px solid var(--panel-border);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-reset:hover {
    background: rgba(248, 113, 113, 0.1);
    border-color: var(--accent-danger);
    color: var(--accent-danger);
}

/* Eyedropper Color Preview */
.eyedropper-preview {
    position: fixed;
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--panel-bg-solid);
    border: var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    pointer-events: none;
    z-index: 10000;
    transform: translate(15px, 15px);
}

.eyedropper-preview.visible {
    display: flex;
}

.eyedropper-preview .eyedropper-color {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.eyedropper-preview .eyedropper-hex {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
}

/* Eyedropper cursor magnifier ring */
.eyedropper-cursor {
    position: fixed;
    width: 80px;
    height: 80px;
    border: 3px solid white;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3), var(--shadow-lg);
    display: none;
}

.eyedropper-cursor.visible {
    display: block;
}

.eyedropper-cursor::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.5);
}

/* Responsive Adjustments */
@media (max-width: 1280px) {
    :root {
        --panel-width: 240px;
    }
}

@media (max-width: 1024px) {
    .panels-container {
        display: none;
    }
    
    .toolbar {
        width: auto;
    }
}

/* =====================================================
   Global Drag & Drop Overlay
   ===================================================== */

.global-drop-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(8px);
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
}

.global-drop-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

.global-drop-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl) 80px;
    border: 3px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.02);
    transform: scale(0.9);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.global-drop-overlay.active .global-drop-content {
    transform: scale(1);
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.05);
}

.drop-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 140px;
    height: 140px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    animation: pulse-glow 2s ease-in-out infinite;
}

.drop-icon-wrapper svg {
    stroke: white;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
    animation: float-up 1.5s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.1),
                    0 0 40px rgba(255, 255, 255, 0.05);
    }
    50% {
        box-shadow: 0 0 0 20px rgba(255, 255, 255, 0),
                    0 0 60px rgba(255, 255, 255, 0.1);
    }
}

@keyframes float-up {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.global-drop-content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    margin: 0;
}

.global-drop-content p {
    font-size: 1rem;
    color: var(--text-muted);
    text-align: center;
    margin: 0;
}

body.drag-active::before {
    content: '';
    position: fixed;
    inset: 0;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-radius: 0;
    pointer-events: none;
    z-index: 9999;
    animation: border-pulse 1s ease-in-out infinite;
}

@keyframes border-pulse {
    0%, 100% {
        border-color: rgba(255, 255, 255, 0.3);
    }
    50% {
        border-color: rgba(255, 255, 255, 0.5);
    }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 60px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 10001;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--panel-bg-solid);
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
    font-size: 0.875rem;
    pointer-events: auto;
    animation: slideIn 0.3s ease-out;
}

.toast.success {
    border-left: 3px solid var(--accent-success);
}

.toast.error {
    border-left: 3px solid var(--accent-danger);
}

.toast.info {
    border-left: 3px solid white;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}