/* SANDBOX THEME - TERMINAL STYLE */
:root {
    --terminal-bg: #0c0c0c;
    --terminal-green: #0f0;
    --terminal-dim: #003300;
    --terminal-white: #e0e0e0;
    --terminal-font: 'Courier New', Courier, monospace;
}

body {
    background-color: var(--terminal-bg);
    color: var(--terminal-green);
    font-family: var(--terminal-font);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* SCANLINES & CRT EFFECT */
body::before {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        rgba(18, 16, 16, 0) 50%, 
        rgba(0, 0, 0, 0.25) 50%
    ), linear-gradient(
        90deg, 
        rgba(255, 0, 0, 0.06), 
        rgba(0, 255, 0, 0.02), 
        rgba(0, 0, 255, 0.06)
    );
    z-index: 2;
    background-size: 100% 2px, 3px 100%;
    pointer-events: none;
}

.container {
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

/* HEADER */
header {
    border-bottom: 2px solid var(--terminal-green);
    padding-bottom: 20px;
    margin-bottom: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-dev {
    font-size: 24px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.back-link {
    color: var(--terminal-green);
    text-decoration: none;
    border: 1px solid var(--terminal-green);
    padding: 5px 15px;
    transition: all 0.3s;
}

.back-link:hover {
    background: var(--terminal-green);
    color: var(--terminal-bg);
}

/* SECTIONS */
.dev-module {
    border: 1px solid var(--terminal-dim);
    background: rgba(0, 20, 0, 0.3);
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 0 10px var(--terminal-dim);
}

.module-title {
    background: var(--terminal-dim);
    color: var(--terminal-green);
    padding: 5px 10px;
    display: inline-block;
    margin-top: -30px;
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: bold;
}

/* COMPONENTS */
button.btn-term {
    background: transparent;
    border: 1px solid var(--terminal-green);
    color: var(--terminal-green);
    padding: 10px 20px;
    font-family: var(--terminal-font);
    cursor: pointer;
    text-transform: uppercase;
    transition: 0.2s;
}

button.btn-term:hover {
    background: var(--terminal-green);
    color: #000;
    box-shadow: 0 0 15px var(--terminal-green);
}

/* CONSOLE LOG */
.console-output {
    background: #000;
    border: 1px solid #333;
    height: 200px;
    overflow-y: auto;
    padding: 10px;
    margin-top: 15px;
    font-size: 12px;
    color: #ccc;
    font-family: 'Courier New', monospace;
}

.log-entry {
    margin-bottom: 5px;
}
.log-time { color: #666; margin-right: 10px; }
.log-info { color: #4fa; }
.log-warn { color: #fe0; }
.log-error { color: #f55; }

/* DVP VISUALIZER */
.dvp-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    position: relative;
    height: 150px; /* Space for animation */
}

.chain-node {
    width: 100px;
    height: 100px;
    border: 2px solid var(--terminal-green);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: #000;
    z-index: 5;
}

.packet {
    width: 20px;
    height: 20px;
    background: var(--terminal-green);
    position: absolute;
    display: none; /* hidden by default */
}

/* FORMS */
input, select {
    background: #000;
    border: 1px solid var(--terminal-dim);
    color: var(--terminal-green);
    padding: 8px;
    font-family: var(--terminal-font);
    width: 100%;
    margin-bottom: 10px;
    box-sizing: border-box;
}

input:focus {
    border-color: var(--terminal-green);
    outline: none;
}