/* =========================================================================
   SAINANI INNOVATIONS - Core StyleSheet
   Premium Tech Aesthetic - Modern, Sleek, Professional
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@500;700&display=swap');

:root {
    /* Color Palette - Tech Deep Blue & Vibrant Teal */
    --color-bg-light: #F4F7FB;
    --color-bg-white: #FFFFFF;
    --color-primary: #0A192F; /* Deep Navy Blue */
    --color-primary-light: #112240;
    --color-primary-dark: #020C1B;
    --color-accent: #64FFDA;  /* Tech Teal/Cyan */
    --color-accent-hover: #52e0c0;
    --color-secondary: #0070F3; /* Bright Enterprise Blue */
    
    --color-text-main: #334A6B;
    --color-text-muted: #8892B0;
    --color-text-heading: #0A192F;
    --color-text-light: #CCD6F6;
    
    --color-border: rgba(10, 25, 47, 0.1);
    --color-border-dark: rgba(255, 255, 255, 0.1);

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing & Layout */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;

    /* Shadows & Effects */
    --shadow-soft: 0 10px 30px -10px rgba(2, 12, 27, 0.05);
    --shadow-hover: 0 20px 40px -15px rgba(2, 12, 27, 0.1);
    --shadow-glow: 0 0 20px rgba(100, 255, 218, 0.2);
    --transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
}

/* =========================================
   Reset & Base Styles
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-main);
    background-color: var(--color-bg-light);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

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

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

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

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

@media(max-width: 768px) {
    .section-padding {
        padding: var(--spacing-lg) 0;
    }
}

/* =========================================
   Reusable Components
   ========================================= */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-bg-white);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background-color: rgba(10, 25, 47, 0.05);
    transform: translateY(-2px);
}

.btn-accent {
    background-color: var(--color-accent);
    color: var(--color-primary-dark);
}

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

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-block;
    padding: 4px 12px;
    background-color: rgba(0, 112, 243, 0.1);
    color: var(--color-secondary);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: 20px;
    text-transform: uppercase;
    margin-bottom: 15px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 20px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--color-text-muted);
}

/* Card Common */
.card {
    background: var(--color-bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(0, 112, 243, 0.2);
}

/* =========================================
   Layout: Header / Nav
   ========================================= */
header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-dark);
}

.nav-menu {
    display: flex;
    gap: 30px;
    list-style: none;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--color-text-main);
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--color-secondary);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    transition: var(--transition);
    border-radius: 3px;
}

@media(max-width: 992px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: calc(100vh - 70px);
        background-color: var(--color-bg-white);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-md);
        box-shadow: -10px 0 30px rgba(0,0,0,0.1);
        transition: right 0.4s ease;
    }
    
    .nav-menu.active {
        right: 0;
    }

    .header-cta {
        display: none;
    }

    .mobile-cta-li {
        margin-top: auto;
        width: 100%;
        display: block !important;
    }
}

/* =========================================
   Layout: Footer
   ========================================= */
footer {
    background-color: var(--color-primary-dark);
    color: var(--color-text-light);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

@media(max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media(max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand .logo {
    color: var(--color-bg-white);
    margin-bottom: 20px;
}

.footer-desc {
    color: var(--color-text-muted);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.footer-col h4 {
    color: var(--color-bg-white);
    margin-bottom: 20px;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--color-accent);
    padding-left: 5px;
}

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--color-text-muted);
}

.footer-bottom {
    border-top: 1px solid var(--color-border-dark);
    padding-top: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}