/* ==========================================================================
   STYLE.CSS - Modern Responsive Website Styles
   ========================================================================== */

/* CSS Reset and Base Styles
   ========================================================================== */

/* Universal box-sizing and reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Root variables for consistent theming */
:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --background-light: #ffffff;
    --background-gray: #f9fafb;
    --background-dark: #111827;
    --border-color: #e5e7eb;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Layout */
    --max-width: 1200px;
    --header-height: 70px;
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

/* Base HTML and Body Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-light);
    overflow-x: hidden;
}

/* Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* Utility Classes
   ========================================================================== */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.section {
    padding: var(--spacing-20) 0;
}

.section:nth-child(even) {
    background-color: var(--background-gray);
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section__title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-medium);
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
    color: white;
}

/* Header and Navigation
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-medium);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.nav__logo h2 {
    color: var(--primary-color);
    font-weight: 700;
    margin: 0;
}

/* NEW: Logo image styling */
.nav__logo-image {
    height: 40px;
    width: auto;
    object-fit: contain;
    transition: all var(--transition-fast);
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-8);
}

.nav__link {
    color: var(--text-primary);
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    position: relative;
}

.nav__link:hover {
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.1);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.nav__toggle:hover {
    background-color: var(--background-gray);
}

.nav__toggle i {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

/* Hero Section
   ========================================================================== */

.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero__bg-image {
    width: 100%;
    height: 100%;
    /* FIXED: Improved background image implementation with fallbacks */
    background-image: url('background_img1.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed; /* Parallax effect */
    filter: brightness(0.7);
    transition: transform var(--transition-slow);
    position: relative;
}

/* Add overlay as a pseudo-element for better control */
.hero__bg-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.4) 0%, rgba(29, 78, 216, 0.4) 100%);
    pointer-events: none;
}

.hero__bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.3);
    z-index: -1;
}

.hero__content {
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 var(--spacing-4);
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    animation: fadeInUp 1s ease-out;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-8);
    color: rgba(255, 255, 255, 0.9);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero__cta {
    animation: fadeInUp 1s ease-out 0.4s both;
    background-color: var(--secondary-color);
    font-size: var(--font-size-lg);
    padding: var(--spacing-4) var(--spacing-8);
}

.hero__cta:hover {
    background-color: #d97706;
    transform: translateY(-3px);
}

/* Technology Section
   ========================================================================== */

.technology__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-8);
}

.technology__card {
    background: var(--background-light);
    padding: var(--spacing-8);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.technology__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.1), transparent);
    transition: left 0.6s ease;
}

.technology__card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-large);
    border-color: var(--primary-color);
}

.technology__card:hover::before {
    left: 100%;
}

.technology__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-6);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.technology__icon i {
    font-size: var(--font-size-3xl);
    color: white;
}

.technology__card:hover .technology__icon {
    transform: scale(1.1) rotate(5deg);
}

.technology__title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
}

.technology__description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Team Section with Updated Layout
   ========================================================================== */

/* NEW: Team section styling for separated groups */
.team__section {
    margin-bottom: var(--spacing-16);
}

.team__section:last-child {
    margin-bottom: 0;
}

.team__section-title {
    text-align: center;
    color: var(--text-primary);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-12);
    position: relative;
}

.team__section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.team__grid {
    display: grid;
    gap: var(--spacing-8);
}

/* NEW: Founders grid - 3 columns */
.team__grid--founders {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    max-width: 900px;
    margin: 0 auto;
}

/* NEW: Mentors grid - 2 columns centered */
.team__grid--mentors {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    max-width: 700px;
    margin: 0 auto;
}

.team__member {
    text-align: center;
    transition: all var(--transition-normal);
}

.team__image {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-6);
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--border-color);
    transition: all var(--transition-normal);
}

.team__photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all var(--transition-normal);
}

.team__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-normal);
}

.team__bio {
    padding: var(--spacing-4);
    text-align: center;
    color: white;
    transform: translateY(20px);
    transition: all var(--transition-normal);
}

.team__bio p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-4);
    color: rgba(255, 255, 255, 0.9);
}

.team__social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3);
}

.team__social a {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all var(--transition-fast);
}

.team__social a:hover {
    background: white;
    color: var(--primary-color);
    transform: scale(1.1);
}

.team__member:hover .team__image {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.team__member:hover .team__overlay {
    opacity: 1;
}

.team__member:hover .team__bio {
    transform: translateY(0);
}

.team__name {
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.team__role {
    color: var(--text-secondary);
    font-weight: 500;
    margin: 0;
}

/* Services Section
   ========================================================================== */

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.services__item {
    background: var(--background-light);
    padding: var(--spacing-8);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.services__item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.services__item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
    border-color: var(--primary-color);
}

.services__item:hover::before {
    transform: scaleX(1);
}

.services__icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-color), #059669);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-6);
    transition: all var(--transition-normal);
}

.services__icon i {
    font-size: var(--font-size-2xl);
    color: white;
}

.services__item:hover .services__icon {
    transform: scale(1.1) rotate(-5deg);
}

.services__title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
}

.services__description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-6);
    line-height: 1.7;
}

.services__features {
    list-style: none;
}

.services__features li {
    padding: var(--spacing-2) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-6);
}

.services__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* Footer
   ========================================================================== */

.footer {
    background-color: var(--background-dark);
    color: white;
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-12);
}

.footer__section h3,
.footer__section h4 {
    margin-bottom: var(--spacing-6);
}

.footer__title {
    color: var(--primary-color);
    font-size: var(--font-size-2xl);
}

.footer__subtitle {
    color: white;
    font-size: var(--font-size-lg);
}

.footer__description {
    color: #9ca3af;
    line-height: 1.7;
    margin-bottom: var(--spacing-6);
}

.footer__social {
    display: flex;
    gap: var(--spacing-4);
}

.footer__social-link {
    width: 44px;
    height: 44px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all var(--transition-fast);
}

.footer__social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    color: white;
}

.footer__links {
    list-style: none;
}

.footer__links li {
    margin-bottom: var(--spacing-3);
}

.footer__link {
    color: #9ca3af;
    transition: all var(--transition-fast);
}

.footer__link:hover {
    color: var(--primary-color);
    padding-left: var(--spacing-2);
}

.footer__contact {
    list-style: none;
}

.footer__contact li {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
    color: #9ca3af;
}

.footer__contact i {
    color: var(--primary-color);
    width: 20px;
}

.footer__bottom {
    border-top: 1px solid #374151;
    padding-top: var(--spacing-8);
    text-align: center;
}

.footer__copyright {
    color: #9ca3af;
    margin: 0;
}

/* Scroll to Top Button
   ========================================================================== */

.scroll-top {
    position: fixed;
    bottom: var(--spacing-8);
    right: var(--spacing-8);
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-large);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.scroll-top.visible {
    transform: translateY(0);
    opacity: 1;
}

.scroll-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
}

/* Animations
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive Design
   ========================================================================== */

/* Tablet Styles */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --spacing-20: 3rem;
        --spacing-16: 2.5rem;
    }
    
    /* NEW: Logo responsive styling */
    .nav__logo-image {
        height: 32px;
    }
    
    .nav__logo h2 {
        font-size: var(--font-size-lg);
    }
    
    .nav__menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-8);
        gap: var(--spacing-6);
        transition: left var(--transition-normal);
        z-index: 999;
    }
    
    .nav__menu.active {
        left: 0;
    }
    
    .nav__link {
        font-size: var(--font-size-lg);
        padding: var(--spacing-4) var(--spacing-6);
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .hero__title {
        font-size: var(--font-size-4xl);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-lg);
    }
    
    .technology__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    /* NEW: Team responsive styling */
    .team__grid--founders {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
    
    .team__grid--mentors {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
    
    .team__section {
        margin-bottom: var(--spacing-12);
    }
    
    .services__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
        text-align: center;
    }
}

/* Mobile Styles */
@media (max-width: 480px) {
    :root {
        --spacing-20: 2rem;
        --spacing-16: 2rem;
        --spacing-12: 1.5rem;
        --spacing-8: 1rem;
    }
    
    .container {
        padding: 0 var(--spacing-3);
    }
    
    /* NEW: Mobile logo styling */
    .nav__logo-image {
        height: 28px;
    }
    
    .nav__logo h2 {
        font-size: var(--font-size-base);
    }
    
    .nav__logo {
        gap: var(--spacing-2);
    }
    
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-base);
    }
    
    .hero__cta {
        padding: var(--spacing-3) var(--spacing-6);
        font-size: var(--font-size-base);
    }
    
    .technology__card,
    .services__item {
        padding: var(--spacing-6);
    }
    
    /* NEW: Mobile team styling */
    .team__image {
        width: 150px;
        height: 150px;
    }
    
    .team__section-title {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-8);
    }
    
    .scroll-top {
        bottom: var(--spacing-4);
        right: var(--spacing-4);
        width: 45px;
        height: 45px;
    }
}

/* Accessibility Improvements
   ========================================================================== */

/* Focus states for keyboard navigation */
.nav__link:focus,
.btn:focus,
.scroll-top:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    /* FIXED: Mobile background attachment fix */
    .hero__bg-image {
        background-attachment: scroll;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --shadow-light: 0 2px 4px 0 rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 4px 8px 0 rgba(0, 0, 0, 0.3);
        --shadow-large: 0 8px 16px 0 rgba(0, 0, 0, 0.3);
    }
}