@import url('https://fonts.googleapis.com/css2?family=Geist+Mono:wght@400;700&display=swap');

:root {
    --bg-color: #1e1e1e;
    --text-color: #d4d4d4;
    --prompt-color: #9d72d1; /* Smooth dark purple */
    --border-color: #404040;
    --hover-bg: #2d2d2d;
    --btn-bg: #333333;
    --btn-hover: #444444;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Geist Mono', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Top Bar */
#top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    border-bottom: 1px solid var(--border-color);
    background-color: #181818;
}

.logo {
    color: var(--text-color);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
}

nav {
    display: flex;
    gap: 12px;
}

.nav-btn {
    background: transparent;
    border: 1px solid transparent;
    color: #888888;
    padding: 6px 16px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.nav-btn:hover {
    color: #ffffff;
}

.nav-btn.active {
    background-color: var(--text-color);
    border: 1px solid var(--text-color);
    color: var(--bg-color);
}

/* Main Content */
main {
    flex: 1;
    overflow-y: auto;
    padding: 40px 20px;
    display: flex;
    justify-content: center;
}

section {
    display: none;
    width: 100%;
    max-width: 800px;
}

section.active-section {
    display: block;
}

/* Home Section */
.intro {
    text-align: center;
    margin-bottom: 40px;
}

.prompt-dollar {
    color: var(--prompt-color);
}

.ascii-art {
    margin-top: 0;
    color: var(--prompt-color);
    font-weight: 700;
    font-size: 0.75rem;
    line-height: 1.1;
    text-align: left;
    display: inline-block;
    white-space: pre;
    overflow-x: auto;
    max-width: 100%;
}

.intro p {
    color: #a0a0a0;
    font-size: 1.05rem;
    margin-bottom: 25px;
}

.action-btn {
    display: inline-block;
    background: var(--btn-bg);
    color: var(--text-color);
    text-decoration: none;
    padding: 10px 24px;
    font-weight: 400;
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: var(--btn-hover);
    border-color: #555555;
}

/* Emulator */
#emulator-wrapper {
    border: 1px solid var(--border-color);
    background-color: #121212;
    margin: 0 auto;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.emulator-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    background-color: #181818;
    font-size: 0.9rem;
    color: #888888;
}

.controls .action-btn {
    padding: 4px 12px;
    font-size: 0.85rem;
}

#emulator-screen {
    width: 100%;
    height: 480px;
    background-color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#emulator-screen canvas {
    display: block;
    margin: 0 auto;
}

/* Guide Section */
.docs {
    background-color: transparent;
    padding: 0 20px;
}

.docs h2 {
    color: var(--prompt-color);
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
    font-weight: 700;
}

.docs h3 {
    margin-top: 35px;
    color: var(--text-color);
    font-weight: 700;
}

.code-block {
    background-color: #161616;
    border: 1px solid var(--border-color);
    padding: 16px;
    margin: 16px 0;
}

.os-label {
    color: #888888;
    font-size: 0.85rem;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.code-block code {
    color: #ce9178; /* Soft orange/red for code string */
    display: block;
    margin-bottom: 12px;
    background: #111111;
    padding: 10px;
}

.note {
    font-size: 0.85rem;
    color: #808080;
    margin: 0;
}

.docs ul {
    line-height: 1.7;
    color: #c0c0c0;
    padding-left: 20px;
}

.docs p {
    color: #c0c0c0;
    line-height: 1.7;
}

.docs a {
    color: var(--prompt-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.docs a:hover {
    border-color: var(--prompt-color);
}

.section-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px dashed var(--border-color);
    text-align: center;
    color: #666666;
    font-size: 0.85rem;
    letter-spacing: 2px;
}