/* 
   Theme: AssistTech Premium
   Colors: Dark Blue, Gray, White
   Font: Poppins
*/

:root {
    /* Color Palette */
    --primary-color: #0f172a; /* Dark Slate Blue - Trust & Tech */
    --secondary-color: #3b82f6; /* Bright Blue - Action & Modernity */
    --accent-color: #64748b; /* Cool Gray - Text */
    --bg-light: #f8fafc; /* Very light gray/white */
    --bg-white: #ffffff;
    --text-main: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;

    /* Spacing */
    --container-width: 1100px;
    --header-height: 70px;
    
    /* --- Transitions --- */
    --transition-fast: 0.3s ease;
}

/* --- Scroll Reveal Animation (Handled by GSAP now) --- */
.reveal {
    visibility: hidden; /* GSAP will handle autoAlpha */
    will-change: transform, opacity; /* Performance optimization */
}

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

html {
    /* scroll-behavior: smooth; - Removed to prevent "scroll to bottom" issue on reload */
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* --- Typography --- */
h1, h2, h3 {
    color: var(--primary-color);
    font-weight: 600;
    line-height: 1.2;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.center {
    text-align: center;
}

.highlight {
    color: var(--secondary-color);
}

.highlight-text {
    color: var(--secondary-color);
    position: relative;
    display: inline-block;
}

/* --- Layout Utility --- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background-color: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.full-width {
    width: 100%;
}

/* --- Header --- */
.header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    background-color: transparent;
    transition: var(--transition-fast);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

/* Change background header */
.scroll-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 10px rgba(0, 0, 0, 0.1);
    height: calc(var(--header-height) - 10px); /* Shrink header */
}

.scroll-header .logo {
    font-size: 1.3rem; /* Shrink logo slightly */
}

.nav-container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%; /* Ensure container takes full height */
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 2rem;
    position: relative; /* For the magic line indicator */
}

/* Wrapper to keep HTML valid (li inside ul) but remove from flow */
.nav-indicator-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    pointer-events: none;
    list-style: none;
}

.nav-indicator {
    position: absolute;
    bottom: -5px;
    left: 0;
    height: 3px;
    background-color: var(--secondary-color);
    border-radius: 3px;
    transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1); /* Smooth sliding */
    width: 0; /* Starts hidden */
    opacity: 0;
}

.nav-link {
    font-weight: 500;
    color: var(--text-main);
    transition: var(--transition-fast);
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0; /* Add padding for better spacing */
}

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

/* Active link styles (Color only, line is handled by .nav-indicator) */
.active-link {
    color: var(--secondary-color);
}

.active-link::after {
    /* Remove previous static underline */
    display: none;
}

/* Exclude active style for the contact button to keep it clean */
.nav-link.btn-contact.active-link {
    color: white;
}

.nav-link.btn-contact {
    padding: 0.5rem 1.2rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 6px;
}

.nav-link.btn-contact:hover {
    background-color: var(--secondary-color);
}

.nav-toggle, .nav-close {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-main);
}

/* Typewriter Effect */
.typewriter-text {
    border-right: 2px solid var(--secondary-color);
    white-space: normal; /* Allow wrapping on mobile */
    animation: blink 0.75s step-end infinite;
}

@keyframes blink {
    0%, 100% { border-color: transparent; }
    50% { border-color: var(--secondary-color); }
}

/* --- Background Patterns --- */
.bg-pattern-dots {
    background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
    background-size: 20px 20px;
}

.bg-pattern-grid {
    background-size: 40px 40px;
    background-image: linear-gradient(to right, rgba(226, 232, 240, 0.5) 1px, transparent 1px),
                      linear-gradient(to bottom, rgba(226, 232, 240, 0.5) 1px, transparent 1px);
}

/* --- Hero Section --- */
.hero {
    padding-top: calc(var(--header-height) + 4rem);
    padding-bottom: 5rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #cbd5e1 100%); /* More blue/tech tint */
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-image: radial-gradient(rgba(59, 130, 246, 0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.5;
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3rem;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    max-width: 90%;
    min-height: 1.8em; /* Prevent layout shift before typing starts */
}

/* Decorative Hero Shape */
.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-shape {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle at 30% 30%, var(--secondary-color), transparent 60%),
                radial-gradient(circle at 70% 70%, var(--primary-color), transparent 60%);
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    opacity: 0.15;
    animation: morph 8s ease-in-out infinite;
    position: relative;
}

.tech-shape::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCIgdmlld0JveD0iMCAwIDQwIDQwIiBzdHJva2U9IiMzYjgyZjYiIHN0cm9rZS13aWR0aD0iMS41IiBmaWxsPSJub25lIj48cGF0aCBkPSJNNSA1aDMwdjMweiIvPjwvc3ZnPg=='); /* Placeholder for illustration */
    background-repeat: no-repeat;
    background-position: center;
    background-size: 50%;
    opacity: 0.8;
}

@keyframes morph {
    0% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
    50% { border-radius: 60% 40% 30% 70% / 50% 30% 70% 40%; }
    100% { border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; }
}

/* --- About Section --- */
.about {
    background-color: var(--bg-white);
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-size: 1.05rem;
}

.about-visual {
    display: flex;
    justify-content: center;
}

.icon-large {
    font-size: 8rem;
    color: var(--secondary-color);
    opacity: 0.1;
}

/* --- Services Section --- */
.services {
    background-color: var(--primary-color);
    color: white;
    position: relative;
    z-index: 1;
}

/* Add a subtle overlay to services to give depth */
.services::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 40%);
    z-index: -1;
}

.services .section-title {
    color: white;
}

.services .section-subtitle {
    color: #94a3b8;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background: rgba(255, 255, 255, 0.03); /* Glassy dark effect */
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    transition: var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--secondary-color);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.service-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: white;
}

.service-description {
    font-size: 0.95rem;
    color: #cbd5e1; /* Lighter text for dark bg */
}

/* --- Why Us Section --- */
.why-us {
    background-color: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    text-align: center;
    padding: 1.5rem;
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: inline-block;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: 50%;
}

.feature-item h3 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* --- Area Section --- */
.area-section {
    background-color: var(--primary-color);
    color: white;
    position: relative;
    overflow: hidden;
}

.area-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 0;
    pointer-events: none;
}

.area-container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.area-content h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.area-content p {
    color: #cbd5e1;
    margin-bottom: 2rem;
}

.area-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 1.05rem;
}

.area-list i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.area-map-visual {
    display: flex;
    justify-content: center;
}

.loader {
    position: relative;
    width: 200px;
    height: 200px;
    background: transparent;
    border-radius: 50%;
    box-shadow: 25px 25px 75px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.loader::before {
    content: "";
    position: absolute;
    inset: 30px;
    background: transparent;
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    box-shadow: inset -5px -5px 25px rgba(0, 0, 0, 0.1), 
                inset 5px 5px 35px rgba(0, 0, 0, 0.1);
}

.loader::after {
    content: "";
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 1px dashed rgba(255, 255, 255, 0.2);
    box-shadow: inset -5px -5px 25px rgba(0, 0, 0, 0.1), 
                inset 5px 5px 35px rgba(0, 0, 0, 0.1);
}

.loader span {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 50%;
    height: 100%;
    background: transparent;
    transform-origin: top left;
    animation: radar81 2s linear infinite;
    border-top: 1px dashed rgba(255, 255, 255, 0.8);
    z-index: 5;
}

.loader span::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--secondary-color);
    transform-origin: top left;
    transform: rotate(-55deg);
    filter: blur(30px) drop-shadow(20px 20px 20px var(--secondary-color));
    opacity: 0.7;
}

@keyframes radar81 {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loader-text {
    z-index: 10;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 1.1rem;
    color: white;
    text-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

/* --- Contact Section --- */
.contact {
    background-color: var(--bg-light);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    background-color: var(--bg-white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05);
}

.contact-subtitle {
    margin-bottom: 2rem;
    color: var(--text-light);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-method i {
    font-size: 2rem;
    color: var(--secondary-color);
    background-color: rgba(59, 130, 246, 0.1);
    padding: 0.8rem;
    border-radius: 12px;
}

.contact-method h3 {
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.contact-method a {
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition-fast);
}

.contact-method a:hover {
    color: var(--secondary-color);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-main);
}

.form-group input,
.form-group textarea {
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: var(--transition-fast);
    background-color: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--secondary-color);
    background-color: white;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

/* --- Footer --- */
.footer {
    background-color: var(--primary-color);
    color: #94a3b8;
    padding-top: 4rem;
    padding-bottom: 2rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-logo .logo {
    color: white;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.footer-logo p {
    max-width: 300px;
    font-size: 0.9rem;
}

.footer-list {
    display: flex;
    gap: 1.5rem;
}

.footer-list a {
    transition: var(--transition-fast);
}

.footer-list a:hover {
    color: white;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    font-size: 1.5rem;
    color: white;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
}

/* --- Responsive Design --- */
@media screen and (max-width: 968px) {
    :root {
        --header-height: 60px;
    }

    .section {
        padding: 3rem 0; /* Reduce padding for tablet/mobile */
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-image {
        order: 2;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        margin: 0 auto 2rem;
    }

    .about-container,
    .area-container {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .contact-container {
        grid-template-columns: 1fr;
        padding: 2rem;
        gap: 2.5rem;
    }
    
    .contact-methods {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }
}

@media screen and (max-width: 768px) {
    /* Hide Magic Line on Mobile */
    .nav-indicator, .nav-indicator-wrapper {
        display: none;
    }

    .nav-menu {
        position: fixed;
        bottom: -100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-white);
        padding: 2rem 1.5rem 4rem;
        box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.1);
        border-radius: 1.5rem 1.5rem 0 0;
        transition: var(--transition-fast);
        z-index: 100;
    }

    /* Show menu class */
    .show-menu {
        bottom: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-close {
        display: block;
        position: absolute;
        top: 1.5rem;
        right: 1.5rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .footer-list {
        justify-content: center;
        flex-wrap: wrap; /* Allow wrapping */
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .service-card {
        padding: 1.5rem;
    }

    .contact-container {
        padding: 1.5rem;
    }
    
    .contact-methods {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .tech-shape {
        width: 280px;
        height: 280px;
    }
    
    .loader {
        width: 160px;
        height: 160px;
    }
    
    .loader-text {
        font-size: 0.9rem;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}