/* Header Styles */
header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    padding: 1.5rem 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.logo i {
    font-size: 2rem;
}

.logo h1 {
    font-weight: 700;
    font-size: 1.8rem;
}

/* Training Principles */
.training-principles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.principle-card {
    background: linear-gradient(135deg, #f0f4ff 0%, #e6f0ff 100%);
    border-radius: 12px;
    padding: 1.5rem;
    border-left: 4px solid var(--primary);
    transition: transform 0.3s ease;
}

.principle-card:hover {
    transform: translateY(-5px);
}

.principle-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.principle-card p {
    color: var(--gray);
    line-height: 1.6;
}

/* Training Phases */
.training-phase {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.phase-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    padding: 1.5rem;
    border-top: 4px solid var(--accent);
}

.phase-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
}

.phase-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.phase-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--dark);
}

.phase-content {
    padding-left: 60px;
}

.phase-content ol {
    padding-left: 1.5rem;
}

.phase-content li {
    margin-bottom: 0.8rem;
    line-height: 1.6;
}

/* Material Cards */
.material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.material-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.material-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.material-header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    padding: 1.5rem;
}

.material-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.material-id {
    opacity: 0.8;
    font-size: 0.9rem;
}

.material-body {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.material-description {
    margin-bottom: 1.5rem;
    line-height: 1.6;
    color: var(--gray);
}

.material-stats {
    display: flex;
    justify-content: space-between;
    color: var(--gray);
    font-size: 0.9rem;
}

/* Material Actions */
.material-actions {
    margin-top: 1rem;
    display: flex;
    justify-content: flex-end;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-icon {
    background: var(--primary);
    color: white;
}

.btn-icon:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 2px solid var(--light-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    z-index: 1;
}

.modal-title {
    font-size: 1.5rem;
    color: white;
    margin: 0;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
    padding: 0.5rem;
    transition: all 0.3s ease;
    opacity: 0.8;
}

.close-modal:hover {
    opacity: 1;
    transform: scale(1.1);
}

.modal-body {
    padding: 1.5rem;
}

.material-detail {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.detail-section {
    background: var(--light);
    border-radius: 8px;
    padding: 1.5rem;
}

.detail-section h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.detail-section-content {
    line-height: 1.6;
}

/* Footer Styles */
footer {
    background: var(--dark);
    color: white;
    padding: 2rem 0;
    margin-top: 4rem;
}

.disclaimer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.disclaimer p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.disclaimer p:last-child {
    margin-bottom: 0;
    opacity: 0.8;
    font-size: 0.9rem;
}

/* Markdown Content Styles */
.markdown-content {
    line-height: 1.8;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin: 1.5em 0 0.8em;
    color: var(--primary);
    line-height: 1.4;
}

.markdown-content h1 { font-size: 2em; }
.markdown-content h2 { font-size: 1.75em; }
.markdown-content h3 { font-size: 1.5em; }
.markdown-content h4 { font-size: 1.25em; }
.markdown-content h5 { font-size: 1.1em; }
.markdown-content h6 { font-size: 1em; }

.markdown-content p {
    margin: 1em 0;
}

.markdown-content ul,
.markdown-content ol {
    margin: 1em 0;
    padding-left: 2em;
}

.markdown-content li {
    margin: 0.5em 0;
}

.markdown-content blockquote {
    margin: 1em 0;
    padding: 1em;
    border-left: 4px solid var(--primary);
    background: var(--light);
    color: var(--gray);
}

.markdown-content code {
    background: var(--light-gray);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-family: monospace;
}

.markdown-content pre {
    background: var(--dark);
    color: white;
    padding: 1em;
    border-radius: 6px;
    overflow-x: auto;
    margin: 1em 0;
}

.markdown-content pre code {
    background: none;
    padding: 0;
    color: inherit;
}

.markdown-content a {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1px solid var(--primary);
    transition: all 0.3s ease;
}

.markdown-content a:hover {
    color: var(--secondary);
    border-bottom-color: var(--secondary);
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: 1em 0;
}

.markdown-content hr {
    border: none;
    border-top: 2px solid var(--light-gray);
    margin: 2em 0;
}

.markdown-content strong {
    color: var(--dark);
    font-weight: 600;
}

.markdown-content em {
    color: var(--gray);
    font-style: italic;
}