:root {
    --ftt-primary: #00C4CC;
    --ftt-primary-dark: #00A9B0;
    --ftt-text: #1f2937;
    --ftt-muted: #6b7280;
    --ftt-bg: #f8fafc;
    --ftt-card-bg: #ffffff;
    --ftt-border: #e2e8f0;
}

.ftt-wrapper {
    max-width: 1080px;
    margin: 0 auto;
    padding: 40px 20px;
    font-family: Inter, system-ui, -apple-system, sans-serif;
    color: var(--ftt-text);
}

.ftt-header {
    text-align: center;
    margin-bottom: 40px;
}

.ftt-header h1 {
    font-size: 34px;
    font-weight: 800;
    margin: 0 0 12px;
    color: var(--ftt-text);
}

.ftt-header p {
    font-size: 16px;
    color: var(--ftt-muted);
    margin: 0 auto;
    max-width: 600px;
    line-height: 1.6;
}

.ftt-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 24px;
}

.ftt-nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ftt-nav-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--ftt-card-bg);
    border: 1px solid var(--ftt-border);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
}

.ftt-nav-item:hover {
    border-color: var(--ftt-primary);
    box-shadow: 0 4px 12px rgba(0, 196, 204, 0.08);
}

.ftt-nav-item.active {
    border-color: var(--ftt-primary);
    background: rgba(0, 196, 204, 0.06);
    box-shadow: 0 4px 15px rgba(0, 196, 204, 0.12);
}

.ftt-nav-icon {
    font-size: 20px;
    line-height: 1;
    padding-top: 2px;
}

.ftt-nav-title {
    font-weight: 700;
    font-size: 14px;
    color: var(--ftt-text);
    margin-bottom: 4px;
}

.ftt-nav-sub {
    font-size: 12px;
    color: var(--ftt-muted);
    line-height: 1.4;
}

.ftt-content {
    background: var(--ftt-card-bg);
    border: 1px solid var(--ftt-border);
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.04);
}

.ftt-panel {
    display: none;
}

.ftt-panel.active {
    display: block;
}

.ftt-video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: #0f172a;
    border-radius: 14px;
    overflow: hidden;
    margin-bottom: 20px;
}

.ftt-video-container video,
.ftt-video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.ftt-no-video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #94a3b8;
    text-align: center;
    font-size: 14px;
}

.ftt-panel h2 {
    font-size: 22px;
    font-weight: 800;
    margin: 0 0 8px;
    color: var(--ftt-text);
}

.ftt-panel p {
    color: var(--ftt-muted);
    font-size: 14.5px;
    line-height: 1.6;
    margin: 0;
}

@media (max-width: 820px) {
    .ftt-grid {
        grid-template-columns: 1fr;
    }
}