/**
 * BIOINTE - LAYOUT STYLES
 * Header, Footer, Navigation, Grid System
 */

/* ==========================================
   HEADER / NAVIGATION
   ========================================== */

.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

.landing-nav.scrolled {
    box-shadow: var(--shadow-md);
}

.landing-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: var(--font-extrabold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-menu a {
    color: var(--text-primary);
    font-weight: var(--font-medium);
    font-size: 15px;
    position: relative;
    padding: 8px 0;
    transition: color var(--transition-fast);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-nav-login {
    padding: 10px 24px;
    color: var(--text-primary);
    font-weight: var(--font-semibold);
    font-size: 15px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-nav-login:hover {
    background: var(--bg-hover);
}

.btn-nav-signup {
    padding: 10px 24px;
    background: var(--gradient-primary);
    color: white;
    font-weight: var(--font-semibold);
    font-size: 15px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    transition: all var(--transition-fast);
}

.btn-nav-signup:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ==========================================
   LANGUAGE SELECTOR
   ========================================== */

.language-selector {
    position: fixed;
    top: 90px;
    right: 24px;
    z-index: var(--z-dropdown);
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: white;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.lang-btn:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: 8px;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown button {
    width: 100%;
    padding: 12px 16px;
    text-align: left;
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: background var(--transition-fast);
}

.lang-dropdown button:hover {
    background: var(--bg-hover);
}

/* ==========================================
   FOOTER
   ========================================== */

.landing-footer {
    background: linear-gradient(180deg, #f9fafb 0%, #ffffff 100%);
    border-top: 1px solid var(--border-light);
    margin-top: 80px;
}

.footer-main {
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 48px;
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 24px;
    font-weight: var(--font-extrabold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-hover);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
}

.footer-links h4 {
    font-size: 14px;
    font-weight: var(--font-bold);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 15px;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid var(--border-light);
    padding: 24px 0;
}

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 0;
}

/* ==========================================
   GRID SYSTEM
   ========================================== */

.grid {
    display: grid;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* ==========================================
   LANDING PAGE LAYOUT
   ========================================== */

.landing-page {
    padding-top: 72px;
}

.hero-section {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.gradient-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--gradient-primary);
    top: -200px;
    left: -100px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-secondary);
    top: 50%;
    right: -150px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: var(--gradient-success);
    bottom: -100px;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: var(--font-semibold);
    color: var(--primary);
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: var(--font-black);
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 20px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: var(--gradient-primary);
    color: white;
    font-weight: var(--font-bold);
    font-size: 16px;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
    transition: all var(--transition-base);
}

.btn-hero-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(102, 126, 234, 0.4);
}

.btn-hero-video {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: white;
    color: var(--text-primary);
    font-weight: var(--font-semibold);
    font-size: 16px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 32px;
    font-weight: var(--font-extrabold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: var(--font-medium);
}

.hero-image {
    position: relative;
}

.dashboard-mockup {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
    animation: float 6s ease-in-out infinite;
}

.dashboard-mockup img {
    width: 100%;
    height: auto;
}

/* ==========================================
   SECTIONS
   ========================================== */

section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: var(--font-bold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: var(--font-extrabold);
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   QUICK ACCESS SECTION
   ========================================== */

.quick-access {
    padding: 40px 0;
    background: white;
}

.quick-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.quick-card {
    padding: 32px 24px;
    background: white;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
}

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

.quick-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.quick-card h3 {
    font-size: 18px;
    font-weight: var(--font-bold);
    margin-bottom: 8px;
    color: var(--text-primary);
}

.quick-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.quick-arrow {
    position: absolute;
    bottom: 24px;
    right: 24px;
    font-size: 24px;
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition-base);
}

.quick-card:hover .quick-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ==========================================
   CTA SECTION
   ========================================== */

.cta-final {
    background: var(--gradient-primary);
    padding: 80px 0;
    text-align: center;
}

.cta-content h2 {
    font-size: 48px;
    font-weight: var(--font-extrabold);
    color: white;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

.btn-cta-large {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 20px 48px;
    background: white;
    color: var(--primary);
    font-size: 18px;
    font-weight: var(--font-bold);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-base);
}

.btn-cta-large:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.cta-note {
    margin-top: 24px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

/* ==========================================
   VIDEO MODAL
   ========================================== */

.video-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.video-modal.active {
    display: flex;
    opacity: 1;
}

.video-modal-content {
    position: relative;
    width: 90%;
    max-width: 1200px;
    aspect-ratio: 16 / 9;
}

.video-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    width: 40px;
    height: 40px;
    background: white;
    color: var(--text-primary);
    border-radius: 50%;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.video-modal-close:hover {
    background: var(--error);
    color: white;
}

.video-modal iframe {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
}

/* ==========================================
   FEED PAGE LAYOUT
   ========================================== */

.feed-page {
    background: var(--bg-page);
    padding-top: 72px;
}

.feed-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 24px;
    display: grid;
    grid-template-columns: 280px 1fr 320px;
    gap: 24px;
    align-items: start;
}

.sidebar-left,
.sidebar-right {
    position: sticky;
    top: 96px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.feed-main {
    min-height: 100vh;
}

/* ==========================================
   RESPONSIVE - LAYOUT
   ========================================== */

@media (max-width: 1200px) {
    .feed-container {
        grid-template-columns: 260px 1fr 300px;
        gap: 20px;
    }
}

@media (max-width: 1024px) {
    .feed-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar-left,
    .sidebar-right {
        display: none;
    }
    
    .nav-menu {
        display: none;
    }
    
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-image {
        order: -1;
    }
    
    .quick-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .quick-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-hero-primary,
    .btn-hero-video {
        width: 100%;
        justify-content: center;
    }
    
    .cta-content h2 {
        font-size: 32px;
    }
    
    .feed-container {
        padding: 16px;
    }
}