/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Modern VS Code inspired color scheme with enhanced gradients */
    --bg-primary: linear-gradient(135deg, #252526 0%, #1e1e1e 100%);
    --bg-secondary: linear-gradient(135deg, #1e1e1e 0%, #181818 100%);
    --bg-tertiary: linear-gradient(135deg, #3c3c3c 0%, #343434 100%);
    --bg-solid-primary: #252526;
    --bg-solid-secondary: #1e1e1e;
    --bg-solid-tertiary: #3c3c3c;
    --text-primary: #e5e5e5;
    --text-secondary: #b3b3b3;
    --text-muted: #888888;
    --accent-primary: linear-gradient(135deg, #007acc 0%, #0066aa 100%);
    --accent-primary-solid: #007acc;
    --accent-focused: #0e639c;
    --accent-secondary: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    --accent-secondary-solid: #4CAF50;
    --accent-danger: #ff5252;
    --accent-warning: #ffc107;
    --border-color: #404040;
    --border-light: #555555;
    --border-gradient: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-large: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(0, 122, 204, 0.3);
    --scrollbar-track: #2d2d2d;
    --scrollbar-thumb: linear-gradient(135deg, #555555 0%, #444444 100%);
    --scrollbar-thumb-hover: linear-gradient(135deg, #777777 0%, #666666 100%);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'Monaco', 'JetBrains Mono', 'Menlo', monospace;
    --grid-unit: 8px;
    --border-radius-small: 6px;
    --border-radius-medium: 10px;
    --border-radius-large: 16px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

[data-theme="light"] {
    --bg-primary: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    --bg-secondary: linear-gradient(135deg, #f8f9fa 0%, #f1f3f4 100%);
    --bg-tertiary: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    --bg-solid-primary: #ffffff;
    --bg-solid-secondary: #f8f9fa;
    --bg-solid-tertiary: #e9ecef;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #6c757d;
    --border-color: #e0e4e7;
    --border-light: #f0f2f5;
    --border-gradient: linear-gradient(135deg, rgba(0,0,0,0.08) 0%, rgba(0,0,0,0.04) 100%);
    --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px rgba(0, 122, 204, 0.2);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --scrollbar-track: #f1f1f1;
    --scrollbar-thumb: linear-gradient(135deg, #c1c1c1 0%, #b1b1b1 100%);
    --scrollbar-thumb-hover: linear-gradient(135deg, #a8a8a8 0%, #989898 100%);
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(0, 122, 204, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(76, 175, 80, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(255, 193, 7, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
    backdrop-filter: blur(0.5px);
}

/* Header Styles - Modern glass effect with enhanced shadows */
.header {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--grid-unit) * 2) calc(var(--grid-unit) * 3);
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-medium);
    z-index: 1000;
    backdrop-filter: blur(20px) saturate(180%);
    transition: all var(--transition-smooth);
    position: relative;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--border-gradient);
    z-index: -1;
    border-radius: 0;
}

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

.header-left h1 {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: calc(var(--grid-unit) * 1);
    letter-spacing: -0.02em;
}

.header-left h1 i {
    background: linear-gradient(135deg, #3776ab 0%, #4b8bbe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.4rem;
    filter: drop-shadow(0 2px 4px rgba(55, 118, 171, 0.3));
}

.header-controls {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Modern Button Styles with gradients and enhanced animations */
.btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: calc(var(--grid-unit) * 1.25) calc(var(--grid-unit) * 2.5);
    border-radius: var(--border-radius-medium);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: calc(var(--grid-unit) * 1);
    transition: all var(--transition-smooth);
    min-height: calc(var(--grid-unit) * 5);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left var(--transition-smooth);
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary-solid);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-glow);
}

.btn:active {
    transform: translateY(-1px) scale(1.01);
    box-shadow: var(--shadow-medium);
}

.btn-primary {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary-solid);
    color: white;
    font-weight: 700;
    box-shadow: var(--shadow-small);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #45a049 0%, #388e3c 100%);
    border-color: #45a049;
    box-shadow: 0 4px 16px rgba(76, 175, 80, 0.4);
    transform: translateY(-2px) scale(1.03);
}

.btn-primary:active {
    transform: translateY(-1px) scale(1.02);
}

.btn-small {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: calc(var(--grid-unit) * 0.5) calc(var(--grid-unit) * 1);
    border-radius: calc(var(--grid-unit) * 0.5);
    cursor: pointer;
    font-size: 12px;
    transition: all var(--transition-fast);
    min-height: calc(var(--grid-unit) * 3);
}

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

.scroll-btn {
    position: absolute;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    width: calc(var(--grid-unit) * 5);
    height: calc(var(--grid-unit) * 5);
    border-radius: var(--border-radius-medium);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all var(--transition-bounce);
    z-index: 10;
    opacity: 0.7;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-small);
}

.scroll-btn:hover {
    background: var(--accent-primary);
    color: white;
    opacity: 1;
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-glow);
}

.scroll-btn:active {
    transform: scale(1.05) rotate(2deg);
}

.scroll-btn-top {
    top: calc(var(--grid-unit) * 1);
    right: calc(var(--grid-unit) * 1);
}

.scroll-btn-bottom {
    bottom: calc(var(--grid-unit) * 1);
    right: calc(var(--grid-unit) * 1);
}

/* Main Content Layout */
.main-content {
    display: flex;
    flex: 1;
    min-height: 0;
    gap: 0;
}

.editor-panel,
.output-panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--bg-secondary);
    position: relative;
    border-radius: var(--border-radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-small);
}

.editor-panel {
    flex: 1;
    min-width: 320px;
    border-right: 1px solid var(--border-color);
    margin: calc(var(--grid-unit) * 0.5);
    margin-right: calc(var(--grid-unit) * 0.25);
}

.output-panel {
    flex: 0 0 400px;
    min-width: 280px;
    margin: calc(var(--grid-unit) * 0.5);
    margin-left: calc(var(--grid-unit) * 0.25);
}

/* Modern Panel Headers with gradients */
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--grid-unit) * 2) calc(var(--grid-unit) * 2.5);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-medium) var(--border-radius-medium) 0 0;
    letter-spacing: 0.01em;
}

.panel-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--border-gradient);
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.file-name {
    color: var(--text-muted);
    font-size: 14px;
    font-family: var(--font-mono);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

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

.output-controls {
    display: flex;
    gap: 4px;
}

/* Editor Styles */
.editor-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.CodeMirror {
    height: 100% !important;
    font-family: var(--font-mono) !important;
    font-size: 14px !important;
    line-height: 1.5 !important;
    background: var(--bg-primary) !important;
}

.CodeMirror-focused .CodeMirror-selected {
    background: rgba(0, 122, 204, 0.25) !important;
}

.CodeMirror-cursor {
    border-left: 2px solid var(--accent-primary) !important;
}

.CodeMirror-gutters {
    background: var(--bg-secondary) !important;
    border-right: 1px solid var(--border-color) !important;
}

.CodeMirror-linenumber {
    color: var(--text-muted) !important;
    padding-right: calc(var(--grid-unit) * 1) !important;
}

/* Output Styles */
.output-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.output-content {
    flex: 1;
    padding: calc(var(--grid-unit) * 2);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.5;
    overflow-y: auto;
    background: var(--bg-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
    scroll-behavior: smooth;
}

.output-line {
    margin-bottom: 4px;
}

.output-line.stdout {
    color: var(--text-primary);
}

.output-line.stderr {
    color: var(--accent-danger);
}

.output-line.system {
    color: var(--text-muted);
    font-style: italic;
}

/* Modern Resizer with gradient and glow */
.resizer {
    width: 6px;
    background: var(--border-color);
    cursor: col-resize;
    transition: all var(--transition-smooth);
    position: relative;
    user-select: none;
    border-radius: var(--border-radius-small);
    margin: calc(var(--grid-unit) * 0.5) 0;
}

.resizer:hover {
    background: var(--accent-primary);
    width: 8px;
    box-shadow: var(--shadow-glow);
    transform: scaleY(1.02);
}

.resizer.resizing {
    background: var(--accent-primary);
    width: 8px;
    box-shadow: var(--shadow-glow);
    transform: scaleY(1.05);
}

.resizer::before {
    content: '';
    position: absolute;
    top: 0;
    left: -2px;
    right: -2px;
    bottom: 0;
    cursor: col-resize;
}

/* Modern Status Bar with glass effect */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--grid-unit) * 1) calc(var(--grid-unit) * 2.5);
    background: var(--glass-bg);
    border-top: 1px solid var(--glass-border);
    font-size: 12px;
    color: var(--text-muted);
    min-height: calc(var(--grid-unit) * 4);
    backdrop-filter: blur(20px) saturate(180%);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.status-right {
    display: flex;
    gap: calc(var(--grid-unit) * 1.5);
    align-items: center;
}

.separator {
    opacity: 0.5;
    color: var(--border-color);
}

/* Loading States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-content h3 {
    margin: 16px 0 8px;
    font-size: 1.5rem;
}

.loading-content p {
    color: #cccccc;
    font-size: 14px;
}

.loading-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-muted);
    gap: 8px;
}

/* Autocomplete Styles */
.CodeMirror-hints {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border-color) !important;
    box-shadow: 0 4px 12px var(--shadow) !important;
    border-radius: 6px !important;
    overflow: hidden !important;
}

.CodeMirror-hint {
    color: var(--text-secondary) !important;
    padding: 6px 12px !important;
    font-family: var(--font-mono) !important;
    border-bottom: 1px solid var(--border-color) !important;
}

.CodeMirror-hint:last-child {
    border-bottom: none !important;
}

.CodeMirror-hint-active {
    background: var(--accent-primary) !important;
    color: white !important;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .header-controls {
        gap: calc(var(--grid-unit) * 0.5);
    }

    .btn {
        padding: calc(var(--grid-unit) * 0.75) calc(var(--grid-unit) * 1.5);
    }

    .output-panel {
        flex: 0 0 350px;
    }
}

@media (max-width: 768px) {
    .header {
        padding: calc(var(--grid-unit) * 1) calc(var(--grid-unit) * 1.5);
    }

    .header-left h1 {
        font-size: 1.25rem;
    }

    .header-controls {
        gap: calc(var(--grid-unit) * 0.5);
    }

    .btn {
        padding: calc(var(--grid-unit) * 0.75) calc(var(--grid-unit) * 1.25);
        font-size: 12px;
    }

    .main-content {
        flex-direction: column;
    }

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

    .output-panel {
        flex: 0 0 280px;
        border-top: 1px solid var(--border-color);
    }

    .resizer {
        height: 4px;
        width: 100%;
        cursor: row-resize;
    }

    .resizer:hover {
        height: 6px;
        width: 100%;
    }

    .resizer.resizing {
        height: 6px;
        width: 100%;
    }

    .resizer::before {
        top: -2px;
        bottom: -2px;
        left: 0;
        right: 0;
        cursor: row-resize;
    }

    .panel-header {
        padding: calc(var(--grid-unit) * 1) calc(var(--grid-unit) * 1.5);
    }

    .output-content {
        padding: calc(var(--grid-unit) * 1.5);
    }

    .scroll-btn {
        width: calc(var(--grid-unit) * 5);
        height: calc(var(--grid-unit) * 5);
    }
}

@media (max-width: 480px) {
    .header-controls .btn span {
        display: none;
    }

    .header-controls .btn {
        padding: calc(var(--grid-unit) * 0.75);
        min-width: calc(var(--grid-unit) * 4);
    }

    .file-name {
        display: none;
    }

    .status-right {
        gap: calc(var(--grid-unit) * 1);
    }

    .output-panel {
        flex: 0 0 240px;
    }
}

@media (max-width: 360px) {
    .header {
        padding: calc(var(--grid-unit) * 0.75) calc(var(--grid-unit) * 1);
    }

    .header-left h1 {
        font-size: 1.1rem;
    }

    .panel-header {
        padding: calc(var(--grid-unit) * 0.75) calc(var(--grid-unit) * 1);
        font-size: 13px;
    }

    .output-content {
        padding: calc(var(--grid-unit) * 1);
        font-size: 12px;
    }
}

/* Mobile Responsive Styles */
@media screen and (max-width: 768px) {
    .container {
        min-width: 100%;
        overflow-x: hidden;
    }

    .header {
        flex-direction: column;
        padding: 10px;
        gap: 10px;
    }

    .header-controls {
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
    }

    .btn {
        padding: 8px 12px;
        font-size: 12px;
        min-height: 36px;
    }
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: calc(var(--grid-unit) * 0.75);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: calc(var(--grid-unit) * 0.75);
    border: 2px solid var(--scrollbar-track);
    transition: background var(--transition-fast);
}

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

::-webkit-scrollbar-corner {
    background: var(--scrollbar-track);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

/* Focus and Selection */
*:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

::selection {
    background: rgba(0, 122, 204, 0.3);
}

/* Enhanced Animation Classes */
.fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-up {
    animation: slideUp 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.glow-pulse {
    animation: glowPulse 2s ease-in-out infinite alternate;
}

@keyframes glowPulse {
    from { box-shadow: var(--shadow-small); }
    to { box-shadow: var(--shadow-glow); }
}

.float {
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

.gradient-shift {
    animation: gradientShift 4s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}