/* Color Palette & Basic Setup */
:root {
    --bg-color: #1a1a1c;
    --panel-bg: #2b2b2e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #ea7600; /* Blender Orange */
    --border-radius: 8px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: linear-gradient(135deg, #2b2b2e 0%, #1a1a1c 100%);
    padding: 60px 0;
    text-align: center;
    border-bottom: 3px solid var(--accent-color);
    box-shadow: var(--shadow);
}

header h1 {
    margin: 0 0 10px 0;
    font-size: 2.8rem;
    color: #ffffff;
    font-weight: 700;
    letter-spacing: -1px;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin: 0 0 10px 0;
}

.author {
    font-size: 0.95rem;
    color: var(--accent-color);
    margin: 0;
    font-weight: 500;
}

/* Media Elements */
.media-video,
.media-image {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: var(--border-radius);
    margin: 0 auto 20px auto;
    box-shadow: var(--shadow);
    display: block;
}

.media-video {
    background-color: #111;
    max-height: 360px;
    object-fit: cover;
}

.description {
    text-align: center;
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 50px auto;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Typography & Sections */
section {
    margin: 70px 0;
}

h2 {
    color: var(--accent-color);
    border-bottom: 2px solid #444;
    padding-bottom: 12px;
    margin-bottom: 25px;
    font-size: 1.8rem;
}

/* Cards for Gestures */
.gestures-content {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.gestures-list {
    flex: 1;
    min-width: 300px;
}

.gestures-image {
    flex: 1;
    min-width: 300px;
}

.gestures-image .media-image {
    max-width: 100%;
    margin: 0 0 15px 0;
}

.gestures-image p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.gesture-cards {
    display: flex;
    flex-direction: column;
    gap: 15px;
    height: 100%;
    min-height: 583px;
}

.card {
    background-color: var(--panel-bg);
    padding: 35px 20px;
    border-radius: var(--border-radius);
    text-align: center;
    border-left: 4px solid var(--accent-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow);
}

.card h3 {
    margin-top: 0;
    color: #fff;
    font-size: 1.2rem;
}

.card p {
    color: var(--text-secondary);
    margin: 8px 0 0 0;
}

/* Grid Layouts */
.details-section,
.guide-steps {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.details-section .column {
    flex: 1;
    min-width: 300px;
}

.step-box {
    background-color: var(--panel-bg);
    padding: 25px;
    border-radius: var(--border-radius);
    flex: 1;
    min-width: 250px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: box-shadow 0.3s ease;
}

.step-box:hover {
    box-shadow: var(--shadow);
}

.step-box h3 {
    color: var(--accent-color);
    margin-top: 0;
    font-size: 1.2rem;
}

ul {
    padding-left: 20px;
    margin: 15px 0;
}

li {
    margin-bottom: 12px;
    color: var(--text-secondary);
}

li strong {
    color: var(--text-primary);
}

code {
    background-color: #111;
    padding: 3px 8px;
    border-radius: 4px;
    color: var(--accent-color);
    font-family: 'Courier New', monospace;
    font-size: 0.95em;
}

/* Download Button */
.download-container {
    text-align: center;
    margin: 30px 0;
}

.download-btn {
    display: inline-block;
    padding: 14px 32px;
    background-color: var(--accent-color);
    color: #ffffff;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(234, 118, 0, 0.3);
    border: 2px solid var(--accent-color);
}

.download-btn:hover {
    background-color: #ff8c00;
    border-color: #ff8c00;
    box-shadow: 0 6px 16px rgba(234, 118, 0, 0.5);
    transform: translateY(-2px);
}

.download-btn:active {
    transform: translateY(0);
}

.btn-icon {
    margin-right: 8px;
    font-weight: 700;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 0;
    background-color: var(--panel-bg);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 80px;
    border-top: 1px solid #444;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .gestures-content {
        flex-direction: column;
        gap: 20px;
    }

    .gestures-list,
    .gestures-image {
        min-width: 100%;
    }

    .gesture-cards {
        flex-direction: column;
        gap: 15px;
    }

    .details-section,
    .guide-steps {
        flex-direction: column;
        gap: 20px;
    }

    .details-section .column,
    .step-box {
        min-width: 100%;
    }

    h2 {
        font-size: 1.5rem;
    }

    section {
        margin: 40px 0;
    }
}