/* ============================================
   AtSKY — Presentation Pages Shared Styles
   Luxury Tech Theme for sub-pages
   ============================================ */

/* Presentation Hero */
.presentation-hero {
    padding: 120px 0 60px;
    text-align: center;
}
.presentation-hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.presentation-hero h2 {
    font-size: var(--fs-2xl);
    font-weight: 700;
    color: var(--clr-text-primary);
}

/* Feature Sections */
.feature-section {
    padding: 80px 0;
    position: relative;
}
.feature-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--grad-line);
    opacity: 0.3;
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.feature-grid.reverse { direction: rtl; }
.feature-grid.reverse > * { direction: ltr; }

.feature-content h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.feature-content > p {
    color: var(--clr-text-secondary);
    font-size: 1.05rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

/* Feature Lists */
.feature-list {
    list-style: none;
    margin-top: 20px;
}
.feature-list li {
    margin-bottom: 14px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--clr-text-secondary);
}
.feature-list li::before {
    content: "›";
    color: var(--clr-accent);
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.2;
    flex-shrink: 0;
}
.feature-list li.planned::before { content: "◦"; }
.feature-list li strong {
    color: var(--clr-text-primary);
    font-weight: 600;
    margin-right: 4px;
}
.feature-list li em {
    color: var(--clr-accent);
    font-style: normal;
    font-size: 0.8em;
    padding: 2px 8px;
    border: 1px solid rgba(0, 229, 255, 0.3);
    border-radius: var(--radius-full);
    margin-left: 8px;
    white-space: nowrap;
}
.feature-list li em.planned {
    color: var(--clr-accent-2);
    border-color: rgba(99, 102, 241, 0.4);
}
.feature-list li em.new {
    color: #00E676;
    border-color: rgba(0, 230, 118, 0.4);
}

/* Feature Images */
.feature-image img {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 229, 255, 0.05);
    display: block;
    margin: 0 auto;
    object-fit: contain;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Tech Badges */
.tech-badges {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 30px;
    justify-content: center;
}
.tech-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--clr-text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}
.tech-badge .badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.tech-badge .badge-dot--purple { background: #6366F1; }
.tech-badge .badge-dot--blue { background: #00E5FF; }
.tech-badge .badge-dot--green { background: #10b981; }
.tech-badge .badge-dot--orange { background: #f59e0b; }
.tech-badge .badge-dot--red { background: #ef4444; }

/* OTA Badge */
.ota-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(0, 229, 255, 0.08));
    border: 1px solid rgba(0, 229, 255, 0.2);
    color: var(--clr-text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 30px;
}
.ota-badge .ota-icon { font-size: 1.3em; }

/* Migration Steps */
.migration-section {
    padding: 80px 0;
    position: relative;
}
.migration-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--grad-line);
    opacity: 0.3;
}
.migration-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
.migration-content h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.migration-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}
.migration-step {
    padding: 30px 20px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    text-align: center;
    position: relative;
    transition: all var(--duration-normal) var(--ease-out);
}
.migration-step:hover {
    border-color: rgba(0, 229, 255, 0.15);
    box-shadow: 0 4px 20px rgba(0, 229, 255, 0.05);
}
.migration-step .step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--grad-primary);
    color: white;
    font-weight: 800;
    font-size: 1.3rem;
    margin-bottom: 15px;
}
.migration-step h3 {
    color: var(--clr-text-primary);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.migration-step p {
    color: var(--clr-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Architecture Cards */
.arch-section {
    padding: 60px 0;
    text-align: center;
    position: relative;
}
.arch-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: var(--grad-line);
    opacity: 0.3;
}
.arch-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}
.arch-card {
    padding: 30px 20px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out);
}
.arch-card:hover {
    border-color: rgba(0, 229, 255, 0.15);
    transform: translateY(-2px);
}
.arch-card .arch-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}
.arch-card h3 {
    color: var(--clr-text-primary);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.arch-card p {
    color: var(--clr-text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Demo Buttons */
.demo-btn-container {
    text-align: center;
    margin-top: 40px;
    display: flex;
    justify-content: center;
    gap: 15px;
}

/* Responsive */
@media (max-width: 768px) {
    .feature-grid { grid-template-columns: 1fr; }
    .feature-grid.reverse { direction: ltr; }
    .presentation-hero h1 { font-size: 2rem; }
    .feature-content h2 { font-size: 1.8rem; }
    .arch-grid { grid-template-columns: 1fr; }
    .migration-steps { grid-template-columns: 1fr; }
}