/* ==========================================================================
   1. Theme Variables & Base Setup
   ========================================================================== */
:root {
    --bg-page: #05070B;
    --bg-terminal: #090D16;
    --bg-topbar: #0F172A;
    --bg-card: #1E293B;
    --border-color: #1E293B;
    --border-glow: rgba(16, 185, 129, 0.2);
    
    --text-primary: #E2E8F0;
    --text-muted: #64748B;
    
    --accent-emerald: #10B981;
    --accent-cyan: #06B6D4;
    --accent-purple: #A855F7;
    --accent-amber: #F59E0B;
    --accent-rose: #F43F5E;
    
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --shadow-window: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 20px rgba(16, 185, 129, 0.08);
}

/* Theme Variations */
[data-theme="matrix"] {
    --bg-page: #000800;
    --bg-terminal: #020D02;
    --bg-topbar: #051A05;
    --bg-card: #0A260A;
    --border-color: #104010;
    --text-primary: #00FF66;
    --text-muted: #008833;
    --accent-emerald: #00FF66;
    --accent-cyan: #33FF99;
    --accent-purple: #00CC44;
    --accent-amber: #99FF00;
}

[data-theme="cyberpunk"] {
    --bg-page: #0F051D;
    --bg-terminal: #14092A;
    --bg-topbar: #210D42;
    --bg-card: #2D1259;
    --border-color: #4A1A93;
    --text-primary: #FDF0FF;
    --text-muted: #9E7CB8;
    --accent-emerald: #00F0FF;
    --accent-cyan: #FF007F;
    --accent-purple: #FFE600;
    --accent-amber: #FF8800;
}

[data-theme="amber"] {
    --bg-page: #0C0800;
    --bg-terminal: #140E00;
    --bg-topbar: #241800;
    --bg-card: #332200;
    --border-color: #4D3300;
    --text-primary: #FFB000;
    --text-muted: #996A00;
    --accent-emerald: #FFC000;
    --accent-cyan: #FFE066;
    --accent-purple: #FF9900;
    --accent-amber: #FFB000;
}

[data-theme="dracula"] {
    --bg-page: #000000;
    --bg-terminal: #070707;
    --bg-topbar: #0F0F0F;
    --bg-card: #141414;
    --border-color: #380C10;
    --shadow-window: 0 20px 50px rgba(0, 0, 0, 0.95), 0 0 25px rgba(225, 29, 72, 0.18);
    --text-primary: #FFFFFF;
    --text-muted: #8E8E93;
    --accent-emerald: #FF2B42;
    --accent-cyan: #FFFFFF;
    --accent-purple: #C51125;
    --accent-amber: #FF4757;
    --accent-rose: #FF002E;
}

[data-theme="zombie"] {
    --bg-page: #050805;
    --bg-terminal: #0B120B;
    --bg-topbar: #121F12;
    --bg-card: #172617;
    --border-color: #274526;
    --shadow-window: 0 20px 50px rgba(0, 0, 0, 0.85), 0 0 25px rgba(132, 204, 22, 0.16);
    --text-primary: #D1E7B7;
    --text-muted: #5D7A53;
    --accent-emerald: #84CC16;
    --accent-cyan: #A3E635;
    --accent-purple: #7E22CE;
    --accent-amber: #EAB308;
    --accent-rose: #DC2626;
}

/* ==========================================================================
   2. Global Layout & Container
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-family: var(--font-mono);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    overflow-x: hidden;
}

.terminal-container {
    width: 100%;
    max-width: 1100px;
    height: 90vh;
    max-height: 850px;
    display: flex;
    flex-direction: column;
}

.terminal-window {
    background-color: var(--bg-terminal);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--shadow-window);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
}

/* Topbar */
.terminal-topbar {
    background-color: var(--bg-topbar);
    border-bottom: 1px solid var(--border-color);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.window-buttons {
    display: flex;
    gap: 8px;
}

.btn-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.15s ease, filter 0.15s ease;
}
.btn-dot:hover { transform: scale(1.15); }
.btn-close { background-color: var(--accent-rose); }
.btn-minimize { background-color: var(--accent-amber); }
.btn-toggle-crt { background-color: var(--accent-emerald); }

.window-title {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.window-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar-chip {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--accent-cyan);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.15s ease;
}
.topbar-chip:hover {
    background: rgba(6, 182, 212, 0.15);
    border-color: var(--accent-cyan);
}

.status-badge {
    font-size: 0.75rem;
    color: var(--accent-emerald);
    display: flex;
    align-items: center;
    gap: 6px;
}
.pulse-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--accent-emerald);
    box-shadow: 0 0 8px var(--accent-emerald);
    animation: pulseGlow 2s infinite;
}

/* Body & Input */
.terminal-body {
    flex: 1;
    padding: 1.2rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

#terminal-output {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.terminal-input-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-top: 0.25rem;
}

.prompt-string {
    white-space: nowrap;
    font-weight: 600;
    font-size: 0.95rem;
}

.prompt-user { color: var(--accent-emerald); }
.prompt-at { color: var(--text-muted); }
.prompt-host { color: var(--accent-cyan); }
.prompt-path { color: var(--accent-amber); }
.prompt-symbol { color: var(--accent-purple); margin-left: 2px; }

.input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    position: relative;
}

#command-input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    caret-color: var(--accent-emerald);
}

/* Custom Scrollbar */
.terminal-body::-webkit-scrollbar {
    width: 8px;
}
.terminal-body::-webkit-scrollbar-track {
    background: var(--bg-terminal);
}
.terminal-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
.terminal-body::-webkit-scrollbar-thumb:hover {
    background: var(--accent-purple);
}

/* Footer */
.terminal-footer {
    background-color: var(--bg-topbar);
    border-top: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    user-select: none;
}

.footer-hint {
    color: var(--text-muted);
}
.footer-credits {
    color: var(--accent-cyan);
}

/* ==========================================================================
   3. CRT Scanline Effect & Keyframes
   ========================================================================== */
.scanline-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 9999;
}

body.crt-enabled .scanline-overlay {
    display: block;
    background: 
        linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%),
        linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
    background-size: 100% 3px, 6px 100%;
    animation: crtFlicker 0.15s infinite;
}

body.crt-enabled .terminal-window::before {
    content: " ";
    display: block;
    position: absolute;
    top: 0; left: 0; bottom: 0; right: 0;
    background: radial-gradient(circle at center, transparent 60%, rgba(0, 0, 0, 0.45) 100%);
    pointer-events: none;
    z-index: 10;
}

@keyframes crtFlicker {
    0% { opacity: 0.97; }
    50% { opacity: 1.0; }
    100% { opacity: 0.98; }
}

@keyframes pulseGlow {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

/* Output Formatting Components */
.cmd-block {
    margin-bottom: 0.5rem;
}
.cmd-prompt-echo {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
}
.cmd-result {
    line-height: 1.5;
    font-size: 0.92rem;
}
.ascii-banner {
    color: var(--accent-emerald);
    font-family: monospace;
    white-space: pre;
    font-size: 0.75rem;
    line-height: 1.15;
    margin-bottom: 0.75rem;
    overflow-x: auto;
}
.quick-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.6rem;
}
.cmd-chip {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--accent-cyan);
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    display: inline-block;
    transition: all 0.15s ease;
}
.cmd-chip:hover {
    border-color: var(--accent-emerald);
    color: var(--accent-emerald);
    transform: translateY(-1px);
}
.term-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.5rem 0;
}
.term-table th, .term-table td {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}
.term-table th {
    background-color: var(--bg-topbar);
    color: var(--accent-purple);
}
.tag-badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 4px;
    margin-bottom: 4px;
}
.tag-emerald { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); border: 1px solid var(--accent-emerald); }
.tag-cyan { background: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); border: 1px solid var(--accent-cyan); }
.tag-purple { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); border: 1px solid var(--accent-purple); }
.tag-amber { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); border: 1px solid var(--accent-amber); }
.tag-rose { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); border: 1px solid var(--accent-rose); }