:root {
    --bg-dark: #070714;
    --panel-bg: rgba(15, 20, 40, 0.7);
    --neon-blue: #00e5ff;
    --dark-blue: #0055ff;
    --text-main: #e0e0e0;
    --text-muted: #8892b0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
header {
    padding: 20px 40px;
    background: var(--panel-bg);
    border-bottom: 1px solid rgba(0, 229, 255, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(10px);
}

header h1 {
    color: var(--neon-blue);
    font-size: 24px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
}

/* Container & Panels */
.container {
    display: flex;
    flex: 1;
    padding: 20px;
    gap: 20px;
}

.panel {
    background: var(--panel-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Editor Specifics */
.sidebar {
    width: 300px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.editor-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#editor {
    flex: 1;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(0, 229, 255, 0.3);
}

/* Buttons */
.btn {
    background: linear-gradient(45deg, var(--dark-blue), var(--neon-blue));
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.btn:hover {
    box-shadow: 0 0 15px var(--neon-blue);
    transform: translateY(-2px);
}

/* Selectors & Inputs */
select, input {
    width: 100%;
    padding: 10px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(0, 229, 255, 0.3);
    color: var(--text-main);
    border-radius: 6px;
    outline: none;
}

select:focus, input:focus {
    border-color: var(--neon-blue);
    box-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
}

/* Output Area */
.output-area {
    height: 30%;
    background: #000;
    border-radius: 8px;
    border: 1px solid rgba(0, 229, 255, 0.3);
    padding: 10px;
}

iframe#output-frame {
    width: 100%;
    height: 100%;
    border: none;
    background: #fff;
    border-radius: 4px;
}