/* ================================
   SENTIENCE.ROCKS - MAIN STYLES
   ================================ */

/* ========== CSS RESET ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ========== ROOT VARIABLES ========== */
:root {
    /* Main Colors */
    --sense-dark: #1A1A1A;
    --sense-dark-70: #505050;
    --sense-dark-50: #8C8C8C;
    --sense-bright: #F7F7F7;

    /* Highlight Colors */
    --sense-purple: #6600FF;
    --sense-turquoise: #00FFA3;

    /* Typography */
    --font-primary: 'Poppins', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    /* Transitions */
    --transition-base: all 0.3s ease;
}

/* ========== BASE STYLES ========== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--sense-dark);
    background-color: var(--sense-bright);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

button {
    font-family: var(--font-primary);
    cursor: pointer;
    border: none;
    background: none;
    transition: var(--transition-base);
}

/* ========== CONTAINER ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========== HEADER / NAVIGATION ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.nav-logo .logo {
    height: 24px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--sense-bright);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    cursor: pointer;
}

.nav-link:hover {
    color: var(--sense-turquoise);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--sense-dark);
    min-width: 200px;
    padding: var(--spacing-sm);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-base);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.dropdown-menu li {
    padding: var(--spacing-xs) var(--spacing-sm);
}

.dropdown-menu a {
    color: var(--sense-bright);
    display: block;
}

.dropdown-menu a:hover {
    color: var(--sense-turquoise);
}

/* Navigation Right Section */
.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.language-selector {
    display: flex;
    gap: var(--spacing-xs);
}

.lang-btn {
    color: var(--sense-dark-70);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    background-color: transparent;
}

.lang-btn.active {
    color: var(--sense-bright);
    background-color: var(--sense-purple);
}

.lang-btn:hover {
    color: var(--sense-bright);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--sense-bright);
    transition: var(--transition-base);
}

/* ========== HERO SECTION ========== */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--sense-dark) 0%, #2a2a2a 100%);
    padding: var(--spacing-xxl) var(--spacing-md);
    margin-top: 60px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

/* Hero background overlay for better text readability */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 26, 0.5);
    z-index: 1;
}

.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 500;
    color: var(--sense-bright);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--sense-bright);
    max-width: 700px;
    margin: 0 auto;
}

/* ========== SECTION STYLES ========== */
section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 500;
    color: var(--sense-dark);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    color: var(--sense-dark-70);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== SOLUTIONS SECTION ========== */
.solutions {
    background-color: var(--sense-bright);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.solution-card {
    background-color: white;
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(102, 0, 255, 0.15);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-md);
}

.card-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.card-sector {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--sense-purple);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.card-tech {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--sense-dark);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    font-size: 0.95rem;
    color: var(--sense-dark-70);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.card-cta {
    color: var(--sense-purple);
    font-weight: 600;
    display: inline-block;
    position: relative;
    padding-bottom: 2px;
}

.card-cta::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--sense-purple);
    transition: var(--transition-base);
}

.card-cta:hover::after {
    width: 100%;
}

/* ========== PARTNERS SECTION ========== */
.partners {
    background-color: white;
}

.partners-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    background-color: transparent;
    color: var(--sense-dark-70);
    font-weight: 500;
    border: 1px solid var(--sense-dark-50);
}

.tab-btn.active {
    background-color: var(--sense-purple);
    color: var(--sense-bright);
    border-color: var(--sense-purple);
}

.tab-btn:hover {
    border-color: var(--sense-purple);
    color: var(--sense-purple);
}

.tab-btn.active:hover {
    color: var(--sense-bright);
}

.partners-content {
    position: relative;
}

.partners-grid {
    display: none;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    align-items: center;
    justify-items: center;
}

.partners-grid.active {
    display: grid;
}

.partners-grid[data-content="defense"] {
    grid-template-columns: repeat(5, 1fr);
}

.partner-logo {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-logo img {
    max-width: 150px;
    height: auto;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: var(--transition-base);
}

.partner-logo:hover img {
    filter: grayscale(0%);
    opacity: 1;
}

/* ========== FEATURED CONTENT SECTION ========== */
.featured-content {
    background-color: var(--sense-bright);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.content-card {
    background-color: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition-base);
    position: relative;
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 255, 163, 0.15);
}

.category-tag {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    background-color: var(--sense-turquoise);
    color: var(--sense-dark);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 1;
}

.card-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

.content-card:hover .card-image img {
    transform: scale(1.05);
}

.card-title {
    padding: var(--spacing-md);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--sense-dark);
    line-height: 1.4;
}

.card-link {
    display: block;
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--sense-purple);
    font-weight: 600;
    font-size: 0.9rem;
}

.card-link:hover {
    color: var(--sense-turquoise);
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.view-more-btn {
    display: inline-block;
    color: var(--sense-dark);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition-base);
}

.view-more-btn:hover {
    color: var(--sense-dark-70);
}

/* ========== FOOTER ========== */
.footer {
    background-color: var(--sense-dark);
    color: var(--sense-bright);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.footer-brand .footer-logo {
    height: 32px;
    width: auto;
}

.footer-brand .footer-tagline {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--sense-bright);
    max-width: 450px;
    line-height: 1.5;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.footer-column h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--sense-bright);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--sense-dark-50);
    font-size: 0.9rem;
}

.footer-column a:hover {
    color: var(--sense-turquoise);
}

.footer-social {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-social a {
    color: var(--sense-dark-50);
    font-size: 0.9rem;
}

.footer-social a:hover {
    color: var(--sense-turquoise);
}

.footer-bottom {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-legal {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-legal p {
    font-size: 0.85rem;
    color: var(--sense-dark-50);
}

.legal-links {
    display: flex;
    gap: var(--spacing-md);
}

.legal-links a {
    font-size: 0.85rem;
    color: var(--sense-dark-50);
}

.legal-links a:hover {
    color: var(--sense-turquoise);
}

.footer-contact {
    text-align: center;
}

.footer-contact p {
    font-size: 0.85rem;
    color: var(--sense-dark-50);
}

.footer-contact a {
    color: var(--sense-dark-50);
}

.footer-contact a:hover {
    color: var(--sense-bright);
}

.footer-lang {
    text-align: right;
}

.lang-toggle {
    color: var(--sense-dark-50);
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--sense-dark-70);
    border-radius: 20px;
}

.lang-toggle:hover {
    color: var(--sense-bright);
    border-color: var(--sense-purple);
}

/* ========== RESPONSIVE DESIGN ========== */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

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

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (max-width: 767px) */
@media (max-width: 767px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--sense-dark);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background-color: rgba(255, 255, 255, 0.05);
        margin-top: var(--spacing-xs);
    }

    .hero {
        min-height: 60vh;
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

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

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

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

    .partners-tabs {
        flex-direction: column;
        align-items: stretch;
    }

    .tab-btn {
        width: 100%;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }

    .footer-lang {
        text-align: center;
    }
}

/* Extra small devices */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 1.75rem;
    }

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