:root {
    --bg-main: #050505;
    --bg-panel: #050505;
    --bg-card: #111111;
    --bg-input: #0f0f0f;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #5cb8ff;
    --accent-hover: #3a9cf0;
    --success: #5cb8ff;
    --error: #ff5c5c;
    --border: #1f1f1f;
    --border-hover: #333333;
    --button-bg: #111111;
    --button-hover: #1f1f1f;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    overflow: hidden;
    font-size: 15px;
    letter-spacing: -0.01em;
}

.split-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* LEFT PANEL */
.left-panel {
    width: 45%;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    background-color: var(--bg-panel);
}

.header {
    padding: 32px 32px 24px;
    text-align: center;
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.03em;
}

.header h1 span {
    color: var(--accent);
}

.header-actions {
    margin-top: 12px;
    display: flex;
    justify-content: center;
}

.portfolio-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 12.5px;
    font-weight: 500;
    padding: 6px 16px;
    border-radius: 20px;
    transition: all 0.2s ease;
}

.portfolio-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background-color: #1a1a1a;
    transform: translateY(-1px);
}

.tabs-container {
    display: flex;
    justify-content: center;
    padding: 0 0 24px 0;
}

.tabs {
    display: flex;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 30px;
    padding: 4px;
    gap: 4px;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn:hover:not(.locked) {
    color: var(--text-primary);
}

.tab-btn.active {
    background-color: #222222;
    color: var(--text-primary);
}

.tab-btn.locked {
    cursor: not-allowed;
    opacity: 0.3;
}

.content-area {
    padding: 0 40px 40px;
    overflow-y: auto;
    flex: 1;
}

.content-area::-webkit-scrollbar {
    width: 6px;
}
.content-area::-webkit-scrollbar-thumb {
    background-color: #222;
    border-radius: 10px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

.tab-content h2 {
    margin-bottom: 12px;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.tab-content h3 {
    margin-top: 24px;
    margin-bottom: 10px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.tab-content p {
    margin-bottom: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
}

code {
    background-color: var(--bg-card);
    color: var(--text-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: ui-monospace, monospace;
    font-size: 13px;
    border: 1px solid var(--border);
}

pre {
    background-color: var(--bg-card);
    color: var(--text-primary);
    padding: 16px;
    border-radius: 12px;
    font-family: ui-monospace, monospace;
    margin-bottom: 16px;
    border: 1px solid var(--border);
    font-size: 13px;
}

.cmd-list {
    list-style: none;
    margin-left: 0;
    margin-bottom: 24px;
}

.cmd-list li {
    margin-bottom: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
    padding-left: 16px;
    border-left: 2px solid var(--border);
}

.tip-box {
    background-color: rgba(92, 184, 255, 0.05);
    border: 1px solid rgba(92, 184, 255, 0.2);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.tip-box strong {
    color: var(--accent);
}

.mission-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: 16px;
    margin-bottom: 32px;
    margin-top: 32px;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.mission-box strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 8px;
    font-size: 15px;
}

.flag-submit {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 24px;
}

.input-group {
    display: flex;
    gap: 8px;
    background-color: var(--bg-card);
    padding: 6px;
    border-radius: 30px;
    border: 1px solid var(--border);
    width: 100%;
    max-width: 400px;
}

.input-group input {
    flex: 1;
    background-color: transparent;
    border: none;
    color: var(--text-primary);
    padding: 10px 16px;
    font-family: ui-monospace, monospace;
    font-size: 13px;
    outline: none;
}

.input-group button {
    background-color: var(--button-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 0 20px;
    border-radius: 20px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.2s;
    font-size: 13px;
}

.input-group button:hover {
    background-color: var(--button-hover);
    border-color: var(--border-hover);
    color: var(--accent);
}

.feedback {
    margin-top: 12px;
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    height: 20px;
}

.feedback.success { color: var(--success); }
.feedback.error { color: var(--error); }

/* RIGHT PANEL (TERMINAL) */
.right-panel {
    width: 55%;
    display: flex;
    flex-direction: column;
    background-color: #000;
}

.terminal-bar {
    background-color: #000;
    padding: 12px 24px;
    font-size: 12px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: ui-monospace, monospace;
}

.terminal-actions {
    display: flex;
    gap: 8px;
}

.terminal-bar button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 20px;
    padding: 4px 12px;
    cursor: pointer;
    font-size: 11px;
    transition: 0.2s;
    font-family: 'Inter', sans-serif;
}

.terminal-bar button:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.terminal-bar button.danger-btn:hover {
    color: #ff6b6b;
    border-color: rgba(255, 107, 107, 0.4);
    background-color: rgba(255, 107, 107, 0.05);
}

iframe#terminal-frame {
    width: 100%;
    flex: 1;
    border: none;
    background: #000;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}