:root {
    /* Color Palette - Premium Dark Mode */
    --bg-base: #0f111a;
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-hover: rgba(255, 255, 255, 0.06);
    --bg-glass-active: rgba(255, 255, 255, 0.09);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Accents */
    --accent-primary: #6366f1; /* Indigo */
    --accent-primary-hover: #818cf8;
    --accent-primary-glow: rgba(99, 102, 241, 0.5);
    
    --accent-secondary: #ec4899; /* Pink */
    --accent-tertiary: #14b8a6; /* Teal */
    
    /* Semantic Colors */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Syntax Highlighting */
    --syn-key: #c792ea;
    --syn-string: #c3e88d;
    --syn-number: #f78c6c;
    --syn-boolean: #ffcb6b;
    --syn-null: #ff5370;
    
    /* Diff Colors */
    --diff-add-bg: rgba(16, 185, 129, 0.15);
    --diff-add-text: #34d399;
    --diff-rem-bg: rgba(239, 68, 68, 0.15);
    --diff-rem-text: #f87171;
    
    /* Fonts */
    --font-ui: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    /* Shadows & Transitions */
    --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 16px;
    --border-radius-sm: 8px;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-ui);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.5;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Dynamic Background Orbs */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out alternate;
}

.orb-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
}

.orb-2 {
    bottom: -20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%);
    animation-delay: -5s;
}

.orb-3 {
    top: 30%;
    left: 40%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, var(--accent-tertiary) 0%, transparent 70%);
    animation-delay: -10s;
    opacity: 0.2;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(5%, 5%) scale(1.1); }
    66% { transform: translate(-5%, 10%) scale(0.9); }
    100% { transform: translate(0, 0) scale(1); }
}

/* Main Container */
.app-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

@supports (height: 100dvh) {
    .app-container {
        min-height: 100dvh;
    }
}

/* Glassmorphism Header */
.glass-header {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-glass);
    position: sticky;
    top: 0;
    z-index: 1200;
}

@supports (top: env(safe-area-inset-top)) {
    .glass-header {
        top: env(safe-area-inset-top);
    }
}

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

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

.open-app-btn {
    background: #64ffda;
    border-color: #64ffda;
    color: #0a192f;
}

.open-app-btn:hover {
    background: #9cffea;
    border-color: #9cffea;
    color: #0a192f;
}

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

.logo-icon {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    background: var(--bg-glass);
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--glass-border);
}

.logo-icon span:first-child { color: var(--accent-secondary); }
.logo-icon span:last-child { color: var(--accent-tertiary); }

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.4rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--glass-border);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    border-radius: calc(var(--border-radius-sm) - 2px);
    font-family: var(--font-ui);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

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

.tab-btn.active {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 0 15px var(--accent-primary-glow);
}

/* Main Content Views */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0; /* important for flex children scrolling */
}

.view {
    display: none;
    flex: 1;
    height: 100%;
    animation: fadeIn 0.4s ease-out forwards;
}

.view.active {
    display: flex;
    flex-direction: column;
}

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

/* Panels */
.panels-container {
    display: flex;
    gap: 2rem;
    flex: 1;
    min-height: 0;
}

.diff-panels {
    flex: 0 0 40%;
}

.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-glass);
    transition: border-color var(--transition-smooth);
}

.panel:focus-within {
    border-color: var(--accent-primary);
}

.panel-max-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 1400;
}

.panel.panel-maximized {
    position: fixed;
    inset: 1.5rem;
    z-index: 1500;
    max-width: none;
    max-height: none;
    margin: 0;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
}

body.panel-max-open {
    overflow: hidden;
}

.panel-max-placeholder {
    flex: 1;
    min-height: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
}

.panel-header h2 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

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

/* Buttons */
.action-btn {
    background: var(--bg-glass);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.action-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.2);
}

.action-btn.primary {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.action-btn.primary:hover {
    background: var(--accent-primary);
    box-shadow: 0 0 15px var(--accent-primary-glow);
}

.action-btn.icon-btn {
    padding: 0.5rem;
    width: 32px;
    height: 32px;
    justify-content: center;
}

.large-btn {
    padding: 0.8rem 2rem;
    font-size: 1rem;
    border-radius: 30px;
}

/* Textareas */
textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    padding: 1.5rem;
    resize: none;
    outline: none;
    line-height: 1.6;
}

textarea::placeholder {
    color: var(--text-muted);
}

/* Output Areas */
.code-container {
    flex: 1;
    overflow: auto;
    position: relative;
    padding: 1.5rem;
}

.code-output {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
    white-space: pre;
    word-break: normal;
    overflow-wrap: normal;
}

.hidden {
    display: none !important;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.modal-panel {
    position: relative;
    width: min(900px, 100%);
    max-height: min(80vh, 900px);
    display: flex;
    flex-direction: column;
    background: var(--bg-glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-glass);
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.modal-body {
    padding: 1rem 1.5rem 1.5rem;
    overflow: auto;
}

.doc-container {
    max-width: 1100px;
}

.doc-content {
    gap: 1.25rem;
}

.doc-hero {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-glass);
}

.doc-hero h2 {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 650;
}

.doc-subtitle {
    color: var(--text-secondary);
    max-width: 70ch;
}

.doc-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.doc-note {
    padding: 0.9rem 1rem;
    color: var(--text-secondary);
}

.doc-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.doc-card {
    padding: 1.25rem 1.25rem;
}

.doc-card h3 {
    margin-bottom: 0.5rem;
}

.doc-card ul,
.doc-card ol {
    padding-left: 1.25rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.doc-section {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.doc-code {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    padding: 0.9rem 1rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    overflow-x: auto;
}

.doc-muted {
    color: var(--text-secondary);
}

.doc-manual {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.doc-manual h4 {
    margin-bottom: 0.35rem;
}

.doc-manual p {
    color: var(--text-secondary);
}

.library-controls {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1rem;
}

.library-search {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: var(--border-radius-sm);
    padding: 0.6rem 0.8rem;
    outline: none;
    font-family: var(--font-ui);
}

.library-search::placeholder {
    color: var(--text-muted);
}

.library-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.library-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    align-items: center;
    padding: 0.9rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
}

.library-meta {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 0;
}

.library-title {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.library-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.library-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.parse-hint {
    margin: 0 1.5rem 1.25rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    white-space: pre;
    overflow: auto;
}

.parse-hint.error {
    border-color: var(--error);
    background: var(--error-bg);
    color: var(--text-primary);
}

.tools-target {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.6rem;
    margin-bottom: 1rem;
}

.tools-result {
    width: 100%;
    height: 220px;
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    margin: 0;
}

.tools-footer {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 0.9rem;
}

/* Status Badge */
.status-badge {
    font-size: 0.8rem;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    background: var(--bg-glass);
    color: var(--text-muted);
    border: 1px solid var(--glass-border);
}

.status-badge.success {
    background: var(--success-bg);
    color: var(--success);
    border-color: var(--success);
}

.status-badge.error {
    background: var(--error-bg);
    color: var(--error);
    border-color: var(--error);
}

.status-badge.warning {
    background: rgba(245, 158, 11, 0.12);
    color: var(--warning);
    border-color: var(--warning);
}

/* Syntax Highlighting Classes */
.json-key { color: var(--syn-key); }
.json-string { color: var(--syn-string); }
.json-number { color: var(--syn-number); }
.json-boolean { color: var(--syn-boolean); }
.json-null { color: var(--syn-null); font-style: italic; }

/* Diff Specific Layout */
.action-bar-center {
    display: flex;
    justify-content: center;
    padding: 1rem 0;
}

.diff-result-panel {
    flex: 1;
}

.diff-container {
    padding: 0;
}

.diff-line {
    padding: 0.1rem 1.5rem;
    display: flex;
}

.diff-line.added {
    background-color: var(--diff-add-bg);
    color: var(--diff-add-text);
}

.diff-line.removed {
    background-color: var(--diff-rem-bg);
    color: var(--diff-rem-text);
}
.diff-line.changed-old {
    background-color: var(--diff-rem-bg);
    color: var(--diff-rem-text);
}
.diff-line.changed-new {
    background-color: var(--diff-add-bg);
    color: var(--diff-add-text);
}

/* Tree Visualizer */
.tree-output {
    flex: 1;
    overflow: auto;
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.6;
}

.tree-node {
    margin-left: 20px;
    position: relative;
}

.tree-node::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: var(--glass-border);
}

.tree-node:last-child::before {
    bottom: auto;
    height: 12px;
}

.tree-node::after {
    content: '';
    position: absolute;
    left: -12px;
    top: 12px;
    width: 10px;
    height: 1px;
    background-color: var(--glass-border);
}

.tree-toggle {
    cursor: pointer;
    user-select: none;
    display: inline-flex;
    align-items: center;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.tree-toggle:hover {
    color: var(--accent-primary);
}

.tree-toggle::before {
    content: '▼';
    display: inline-block;
    width: 16px;
    font-size: 10px;
    transition: transform 0.2s;
}

.tree-toggle.collapsed::before {
    transform: rotate(-90deg);
}

.tree-children {
    display: block;
}

.tree-children.hidden {
    display: none;
}

.tree-key {
    color: var(--syn-key);
    font-weight: 500;
}

.tree-value {
    display: inline-block;
}

.tree-bracket {
    color: var(--text-secondary);
}

.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 1.1rem;
}

/* Search Features */
/* Search Features */
.search-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 0.8rem 1.5rem;
    background: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid var(--glass-border);
    transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.3s ease;
    max-height: 200px;
    opacity: 1;
    overflow: hidden;
}

.search-toolbar.hidden-toolbar {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
    border-bottom: none;
}

.search-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition-fast);
    width: 160px;
}

.search-input:focus {
    border-color: var(--accent-primary);
    width: 200px;
    box-shadow: 0 0 10px var(--accent-primary-glow);
    background: var(--bg-glass);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-select {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    outline: none;
    cursor: pointer;
}

.search-select option {
    background: var(--bg-base);
    color: var(--text-primary);
}

.search-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 40px;
    text-align: center;
}

.search-highlight {
    background-color: rgba(236, 72, 153, 0.3); /* Accent secondary */
    color: #fff;
    border-radius: 3px;
    padding: 0 2px;
    box-shadow: 0 0 5px rgba(236, 72, 153, 0.5);
}

.search-highlight.active-highlight {
    background-color: var(--accent-primary);
    box-shadow: 0 0 8px var(--accent-primary-glow);
}

/* Responsive */
@media (max-width: 1024px) {
    .panels-container {
        flex-direction: column;
    }
    .panel {
        flex: none;
        height: clamp(320px, 45vh, 520px);
    }
    .diff-panels {
        flex-direction: row;
    }
}

@media (max-width: 768px) {
    .diff-panels {
        flex-direction: column;
    }
    .glass-header {
        flex-direction: column;
        gap: 1rem;
        padding: 0.9rem 1rem;
        align-items: stretch;
    }

    .app-container {
        padding: 1rem;
    }

    .header-right {
        width: 100%;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .tabs {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        scroll-snap-type: x mandatory;
    }

    .tabs::-webkit-scrollbar {
        display: none;
    }

    .tab-btn {
        flex: 0 0 auto;
        scroll-snap-align: start;
        padding: 0.55rem 0.9rem;
        font-size: 0.9rem;
    }

    .header-actions {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 0.25rem;
    }

    .header-actions::-webkit-scrollbar {
        display: none;
    }

    .action-btn {
        padding: 0.55rem 0.9rem;
        min-height: 40px;
    }

    .action-btn.icon-btn {
        width: 40px;
        height: 40px;
    }

    textarea {
        padding: 1rem;
        font-size: 0.9rem;
    }

    .code-container {
        padding: 1rem;
    }

    .doc-hero {
        padding: 1.25rem;
    }

    .doc-grid,
    .doc-manual {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .panel-header {
        flex-wrap: wrap;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .panel-header h2 {
        width: 100%;
    }

    .actions {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 0.25rem;
    }

    .actions::-webkit-scrollbar {
        display: none;
    }
}