/* ========================================
   Download Page Styles
   ======================================== */

/* Hero */
.download-hero {
    padding: 140px 0 40px;
    text-align: center;
}

.download-hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.download-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--primary-bg);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-full);
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.download-hero-title {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 16px;
}

.download-hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Download Card */
.download-section {
    padding: 20px 0 80px;
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.download-card-header {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
}

.download-platform-icon {
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-lg);
    color: var(--primary-light);
}

.download-card-info h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.download-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.download-version {
    color: var(--text-tertiary);
}

.download-version-num {
    font-weight: 600;
    color: var(--primary-light);
}

.download-separator {
    color: var(--border-light);
}

/* Download Button */
.download-card-body {
    text-align: center;
    margin-bottom: 32px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
}

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

.download-hint {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* Info Grid */
.download-card-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.download-info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.download-info-item {
    text-align: center;
}

.info-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-bottom: 4px;
}

.info-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* System Requirements */
.req-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.req-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    backdrop-filter: blur(20px);
    transition: all var(--transition-slow);
}

.req-card:hover {
    border-color: var(--primary-border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.req-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-lg);
    color: var(--primary-light);
    margin: 0 auto 16px;
}

.req-icon svg {
    width: 28px;
    height: 28px;
}

.req-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.req-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Install Steps */
.steps-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    backdrop-filter: blur(20px);
    transition: all var(--transition-slow);
}

.step-item:hover {
    border-color: var(--primary-border);
}

.step-number {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 50%;
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.step-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Changelog */
.changelog-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.changelog-item {
    display: flex;
    gap: 24px;
    position: relative;
    padding: 24px 0;
}

.changelog-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 67px;
    top: 60px;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.changelog-version {
    flex-shrink: 0;
    width: 120px;
    text-align: right;
}

.version-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-bg);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-full);
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 600;
}

.version-date {
    display: block;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 6px;
}

.changelog-content {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.changelog-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.changelog-content ul {
    list-style: none;
    padding: 0;
}

.changelog-content li {
    position: relative;
    padding-left: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.changelog-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
}

/* Responsive */
@media (max-width: 1024px) {
    .req-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .download-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .download-hero-title {
        font-size: 2rem;
    }

    .download-card {
        padding: 24px;
    }

    .download-card-header {
        flex-direction: column;
        text-align: center;
    }

    .download-meta {
        justify-content: center;
    }

    .btn-download {
        width: 100%;
        justify-content: center;
        padding: 14px 24px;
    }

    .req-grid {
        grid-template-columns: 1fr;
    }

    .download-info-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .step-item {
        flex-direction: column;
        gap: 12px;
    }

    .changelog-item {
        flex-direction: column;
        gap: 8px;
    }

    .changelog-version {
        text-align: left;
        width: auto;
    }

    .changelog-item:not(:last-child)::after {
        left: 20px;
        top: 40px;
    }
}