/* ============================================
   SIA DESIGN CENTER — Demo Styles v0.1.0
   Application-specific styles for the demo page.
   The design system tokens are in styles/tokens/
   ============================================ */

/* ============================================
   NAVIGATION
   ============================================ */
.sia-nav {
    position: sticky;
    top: 0;
    z-index: var(--sia-z-sticky);
    background: var(--sia-bg-elevated);
    border-bottom: 1px solid var(--sia-border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.sia-nav-inner {
    max-width: var(--sia-container-max);
    margin: 0 auto;
    padding: var(--sia-space-3) var(--sia-space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sia-space-4);
}

.sia-nav-logo {
    display: flex;
    align-items: center;
    gap: var(--sia-space-2);
    font-size: var(--sia-text-lg);
    font-weight: var(--sia-weight-bold);
    color: var(--sia-text-primary);
    letter-spacing: var(--sia-tracking-tight);
    text-decoration: none;
}

.sia-nav-logo img {
    width: 28px;
    height: 28px;
    border-radius: var(--sia-radius-sm);
}

.sia-nav-logo .accent {
    color: var(--sia-primary);
}

.sia-nav-links {
    display: flex;
    gap: var(--sia-space-1);
}

.sia-nav-links a {
    padding: var(--sia-space-2) var(--sia-space-4);
    font-size: var(--sia-text-sm);
    font-weight: var(--sia-weight-medium);
    color: var(--sia-text-secondary);
    border-radius: var(--sia-radius-md);
    transition: all var(--sia-transition-fast);
    text-decoration: none;
}

.sia-nav-links a:hover,
.sia-nav-links a.active {
    color: var(--sia-text-primary);
    background: var(--sia-bg-hover);
}

.sia-nav-actions {
    display: flex;
    align-items: center;
    gap: var(--sia-space-2);
}

.sia-nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--sia-space-2);
}

.sia-nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--sia-text-primary);
    border-radius: 1px;
    transition: all var(--sia-transition-fast);
}

/* Theme icon visibility */
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: inline; }
[data-theme="light"] .theme-icon-dark { display: none; }
[data-theme="light"] .theme-icon-light { display: inline; }

/* ============================================
   HERO SECTION
   ============================================ */
.sia-hero {
    padding: var(--sia-space-16) var(--sia-space-6);
    max-width: var(--sia-container-max);
    margin: 0 auto;
}

.sia-hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sia-space-12);
    align-items: center;
}

.sia-hero-text {
    display: flex;
    flex-direction: column;
    gap: var(--sia-space-6);
}

.sia-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--sia-space-2);
    padding: var(--sia-space-1) var(--sia-space-4);
    font-size: var(--sia-text-xs);
    font-weight: var(--sia-weight-medium);
    border-radius: var(--sia-radius-full);
    background: var(--sia-primary-light);
    color: var(--sia-primary-dark);
    width: fit-content;
}

.sia-hero-badge .status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--sia-success);
    box-shadow: var(--sia-glow-success);
}

.sia-hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: var(--sia-weight-bold);
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--sia-text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--sia-primary), var(--sia-agent-sia), var(--sia-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sia-hero p {
    font-size: var(--sia-text-lg);
    color: var(--sia-text-secondary);
    line-height: var(--sia-leading-relaxed);
    max-width: 500px;
}

.sia-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sia-space-3);
}

/* Hero Image Placeholder */
.sia-hero-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--sia-bg-surface);
    border: 2px dashed var(--sia-border-color);
    border-radius: var(--sia-radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--sia-space-3);
    transition: all var(--sia-transition-normal);
    cursor: pointer;
}

.hero-placeholder:hover {
    border-color: var(--sia-primary);
    background: var(--sia-bg-hover);
}

.hero-placeholder-icon {
    font-size: 3rem;
    opacity: 0.6;
}

.hero-placeholder-text {
    font-size: var(--sia-text-lg);
    font-weight: var(--sia-weight-semibold);
    color: var(--sia-text-primary);
}

.hero-placeholder-hint {
    font-size: var(--sia-text-xs);
    color: var(--sia-text-muted);
}

/* ============================================
   SECTIONS
   ============================================ */
.sia-section {
    padding: var(--sia-space-12) var(--sia-space-6);
    max-width: var(--sia-container-max);
    margin: 0 auto;
}

.sia-section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--sia-space-4);
    margin-bottom: var(--sia-space-8);
}

.sia-section-header h2 {
    font-size: var(--sia-text-3xl);
    font-weight: var(--sia-weight-bold);
    color: var(--sia-text-primary);
    margin-bottom: var(--sia-space-2);
}

.sia-section-header p {
    color: var(--sia-text-muted);
    font-size: var(--sia-text-base);
}

.sia-section-actions {
    display: flex;
    gap: var(--sia-space-2);
    flex-wrap: wrap;
}

/* ============================================
   PROJECT CARDS
   ============================================ */
.sia-project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--sia-space-6);
}

.sia-project-card {
    background: var(--sia-bg-surface);
    border: 1px solid var(--sia-border-color);
    border-radius: var(--sia-radius-xl);
    overflow: hidden;
    transition: all var(--sia-transition-normal);
}

.sia-project-card:hover {
    border-color: var(--sia-border-hover);
    box-shadow: var(--sia-shadow-lg);
    transform: translateY(-2px);
}

.project-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--sia-space-2);
}

.project-placeholder-icon {
    font-size: 2.5rem;
}

.project-placeholder-label {
    font-size: var(--sia-text-lg);
    font-weight: var(--sia-weight-bold);
    color: rgba(255, 255, 255, 0.9);
}

.project-body {
    padding: var(--sia-space-5);
}

.project-body h3 {
    font-size: var(--sia-text-lg);
    font-weight: var(--sia-weight-semibold);
    margin-bottom: var(--sia-space-1);
}

.project-body p {
    font-size: var(--sia-text-sm);
    color: var(--sia-text-secondary);
    line-height: var(--sia-leading-relaxed);
    margin-bottom: var(--sia-space-3);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sia-space-1);
}

.project-tags span {
    padding: 2px 8px;
    font-size: 0.6875rem;
    font-weight: var(--sia-weight-medium);
    border-radius: var(--sia-radius-full);
    background: var(--sia-bg-hover);
    color: var(--sia-text-muted);
}

.project-actions {
    display: flex;
    gap: var(--sia-space-2);
    padding: var(--sia-space-3) var(--sia-space-5);
    border-top: 1px solid var(--sia-border-color);
}

/* ============================================
   COMPONENT GALLERY
   ============================================ */
.sia-component-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--sia-space-4);
}

.component-preview {
    background: var(--sia-bg-hover);
    border-radius: var(--sia-radius-md);
    padding: var(--sia-space-4);
    margin-bottom: var(--sia-space-3);
    display: flex;
    flex-wrap: wrap;
    gap: var(--sia-space-2);
    align-items: center;
    min-height: 60px;
}

.sia-component-grid h4 {
    font-size: var(--sia-text-sm);
    font-weight: var(--sia-weight-semibold);
    margin-bottom: var(--sia-space-1);
}

.sia-component-grid p {
    font-size: var(--sia-text-xs);
    color: var(--sia-text-muted);
}

/* ============================================
   DESIGN TOKENS
   ============================================ */
.sia-token-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--sia-space-4);
}

.token-swatches {
    display: flex;
    gap: var(--sia-space-2);
    margin: var(--sia-space-3) 0;
}

.token-swatches span {
    width: 28px;
    height: 28px;
    border-radius: var(--sia-radius-sm);
    border: 1px solid var(--sia-border-color);
}

.token-spacing-demo {
    display: flex;
    gap: 4px;
    align-items: flex-end;
    margin: var(--sia-space-3) 0;
}

.token-spacing-demo div {
    height: 24px;
    background: var(--sia-primary);
    border-radius: 2px;
    opacity: 0.6;
}

.sia-token-grid h4 {
    font-size: var(--sia-text-sm);
    font-weight: var(--sia-weight-semibold);
    margin-bottom: var(--sia-space-1);
}

.sia-token-grid p {
    font-size: var(--sia-text-xs);
    color: var(--sia-text-muted);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.sia-contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sia-space-8);
}

.sia-contact-info h2 {
    font-size: var(--sia-text-3xl);
    font-weight: var(--sia-weight-bold);
    margin-bottom: var(--sia-space-4);
}

.sia-contact-info > p {
    color: var(--sia-text-secondary);
    margin-bottom: var(--sia-space-6);
    line-height: var(--sia-leading-relaxed);
}

.sia-contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--sia-space-4);
}

.contact-item {
    display: flex;
    gap: var(--sia-space-3);
    align-items: flex-start;
}

.contact-icon {
    font-size: 1.25rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--sia-bg-hover);
    border-radius: var(--sia-radius-md);
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    font-size: var(--sia-text-sm);
    color: var(--sia-text-primary);
}

.contact-item span {
    font-size: var(--sia-text-xs);
    color: var(--sia-text-muted);
}

/* Contact Form */
.sia-contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--sia-space-4);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--sia-space-1);
}

.form-group label {
    font-size: var(--sia-text-sm);
    font-weight: var(--sia-weight-medium);
    color: var(--sia-text-primary);
}

.form-group input,
.form-group textarea {
    padding: var(--sia-space-3) var(--sia-space-4);
    background: var(--sia-bg-hover);
    border: 1px solid var(--sia-border-color);
    border-radius: var(--sia-radius-md);
    font-size: var(--sia-text-sm);
    color: var(--sia-text-primary);
    transition: border-color var(--sia-transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--sia-primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--sia-text-muted);
}

/* ============================================
   FOOTER
   ============================================ */
.sia-footer {
    background: var(--sia-bg-elevated);
    border-top: 1px solid var(--sia-border-color);
    padding: var(--sia-space-12) var(--sia-space-6) var(--sia-space-6);
    margin-top: var(--sia-space-16);
}

.sia-footer-grid {
    max-width: var(--sia-container-max);
    margin: 0 auto var(--sia-space-8);
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--sia-space-8);
}

.sia-footer-brand p {
    font-size: var(--sia-text-sm);
    color: var(--sia-text-muted);
    line-height: var(--sia-leading-relaxed);
}

.sia-footer-links h4 {
    font-size: var(--sia-text-sm);
    font-weight: var(--sia-weight-semibold);
    color: var(--sia-text-primary);
    margin-bottom: var(--sia-space-3);
}

.sia-footer-links a {
    display: block;
    font-size: var(--sia-text-sm);
    color: var(--sia-text-muted);
    padding: var(--sia-space-1) 0;
    transition: color var(--sia-transition-fast);
    text-decoration: none;
}

.sia-footer-links a:hover {
    color: var(--sia-text-primary);
}

.sia-footer-bottom {
    max-width: var(--sia-container-max);
    margin: 0 auto;
    padding-top: var(--sia-space-6);
    border-top: 1px solid var(--sia-border-color);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--sia-space-2);
    font-size: var(--sia-text-xs);
    color: var(--sia-text-muted);
}

.footer-tagline {
    color: var(--sia-text-secondary);
    font-style: italic;
}

/* ============================================
   MODALS
   ============================================ */
.sia-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: var(--sia-z-modal);
    align-items: center;
    justify-content: center;
    padding: var(--sia-space-4);
}

.sia-modal.active {
    display: flex;
}

.sia-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.sia-modal-content {
    position: relative;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    z-index: 1;
}

.sia-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--sia-space-4);
}

.sia-modal-header h3 {
    font-size: var(--sia-text-lg);
    font-weight: var(--sia-weight-semibold);
}

.modal-close {
    font-size: 1.5rem;
    line-height: 1;
    padding: var(--sia-space-1) var(--sia-space-2);
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--sia-border-color);
    border-radius: var(--sia-radius-lg);
    padding: var(--sia-space-8);
    text-align: center;
    transition: all var(--sia-transition-normal);
    cursor: pointer;
}

.upload-zone:hover {
    border-color: var(--sia-primary);
    background: var(--sia-bg-hover);
}

.upload-zone-icon {
    font-size: 2.5rem;
    margin-bottom: var(--sia-space-3);
}

.upload-zone p {
    font-size: var(--sia-text-sm);
    color: var(--sia-text-secondary);
    margin-bottom: var(--sia-space-2);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .sia-hero-content {
        grid-template-columns: 1fr;
        gap: var(--sia-space-8);
    }
    
    .sia-hero-image {
        order: -1;
    }
    
    .hero-placeholder {
        aspect-ratio: 16/9;
        max-width: 500px;
    }
    
    .sia-contact-grid {
        grid-template-columns: 1fr;
    }
    
    .sia-footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .sia-nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--sia-bg-elevated);
        flex-direction: column;
        padding: var(--sia-space-4);
        border-bottom: 1px solid var(--sia-border-color);
    }
    
    .sia-nav-links.active {
        display: flex;
    }
    
    .sia-nav-toggle {
        display: flex;
    }
    
    .sia-hero {
        padding: var(--sia-space-8) var(--sia-space-4);
    }
    
    .sia-section {
        padding: var(--sia-space-8) var(--sia-space-4);
    }
    
    .sia-section-header {
        flex-direction: column;
    }
    
    .sia-project-grid {
        grid-template-columns: 1fr;
    }
    
    .sia-component-grid,
    .sia-token-grid {
        grid-template-columns: 1fr;
    }
    
    .sia-footer-grid {
        grid-template-columns: 1fr;
        gap: var(--sia-space-6);
    }
    
    .sia-footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .sia-hero h1 {
        font-size: 2rem;
    }
    
    .sia-hero-actions {
        flex-direction: column;
    }
    
    .sia-hero-actions .sia-btn {
        width: 100%;
    }
}