/* ========================================
   Global Styles & Reset
   ======================================== */

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

:root {
    /* Color Palette */
    --bg-primary: #1E1E1E;
    --bg-secondary: #2D2D2D;
    --bg-tertiary: #252525;

    --text-primary: #E0E0E0;
    --text-secondary: #A0A0A0;
    --text-muted: #707070;

    --border-color: #3A3A3A;
    --border-color-light: #4A4A4A;

    /* Node Colors */
    --node-composite: #4A90E2;
    --node-decorator: #9B59B6;
    --node-leaf: #2ECC71;

    /* Connection Colors */
    --connection-default: #7F8C8D;
    --connection-active: #3498DB;

    /* Status Colors */
    --status-success: #27AE60;
    --status-failure: #E74C3C;
    --status-running: #F1C40F;
    --status-idle: #95A5A6;

    /* Selection */
    --selection-color: #F39C12;
    --selection-bg: rgba(243, 156, 18, 0.2);

    /* UI Elements */
    --btn-primary: #3498DB;
    --btn-primary-hover: #2980B9;
    --btn-danger: #E74C3C;
    --btn-danger-hover: #C0392B;

    /* Grid */
    --grid-color: #2D2D2D;
    --grid-dot-color: #404040;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Application Layout
   ======================================== */

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

#main-content {
    display: flex;
    flex: 1;
    position: relative;
    overflow: hidden;
}

/* ========================================
   Utilities
   ======================================== */

.hidden {
    display: none !important;
}

.disabled {
    opacity: 0.5;
    pointer-events: none;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: #5A5A5A;
}

/* ========================================
   Buttons
   ======================================== */

button {
    font-family: var(--font-family);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--btn-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
}

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

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color-light);
}

.btn-close {
    background: transparent;
    color: var(--text-secondary);
    font-size: 18px;
    padding: var(--spacing-xs);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

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

/* ========================================
   Inputs
   ======================================== */

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-track {
    background-color: var(--bg-secondary);
    border-radius: 4px;
    height: 6px;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    background-color: var(--btn-primary);
    border-radius: 50%;
    height: 16px;
    width: 16px;
    margin-top: -5px;
}

input[type="range"]::-moz-range-track {
    background-color: var(--bg-secondary);
    border-radius: 4px;
    height: 6px;
}

input[type="range"]::-moz-range-thumb {
    background-color: var(--btn-primary);
    border: none;
    border-radius: 50%;
    height: 16px;
    width: 16px;
}

input[type="checkbox"] {
    cursor: pointer;
    margin-right: var(--spacing-sm);
}

/* ========================================
   Toast Notifications
   ======================================== */

.toast-container {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    pointer-events: none;
}

.toast {
    background-color: rgba(52, 152, 219, 0.95);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}