/* 
   AMTIOG Tech - Ultra-Premium Multi-Page Design 
   Colors: Black (#0B0B0B), Red (#E10600), White (#FFFFFF), Gray (#B3B3B3)
*/

:root {
    --bg-color: #0B0B0B;
    --text-main: #FFFFFF;
    --text-muted: #B3B3B3;
    --accent-color: #E10600;
    --accent-hover: #b30500;
    --card-bg: #141414;
    --border-color: #222222;
    --font-main: 'Inter', sans-serif;
    --transition-speed: 0.4s;
    --container-width: 1200px;
    --header-height: 80px;
    --ease-out-cubic: cubic-bezier(0.215, 0.61, 0.355, 1);
}

.hero {
    position: relative;
    overflow: hidden;
    min-height: 100vh;
}

.hero-content {
    position: relative;
    z-index: 20;
}

.hero {
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 20;
}


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

html {
    scroll-behavior: smooth;
    height: 100%;
}

body {
    background-color: var(--bg-color);
    color: var(--text-muted);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    font-size: 16px;
    position: relative;
    opacity: 0;
    /* For Page Transition */
    animation: pageFadeIn 0.8s var(--ease-out-cubic) forwards;
}

@keyframes pageFadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

body.fade-out {
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* --- BACKGROUND LAYERS --- */
/* Layer 1: Red Glow (Atmospheric) */
.bg-glow-layer {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(225, 6, 0, 0.08) 0%, transparent 60%);
    transform: translate(-50%, -50%);
    z-index: -3;
    pointer-events: none;
    animation: breatheGlow 12s infinite alternate ease-in-out;
}

@keyframes breatheGlow {
    0% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(0.9);
    }

    100% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

/* Layer 2: Animated Grid */
.grid-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    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: -2;
    pointer-events: none;
    mask-image: radial-gradient(circle at center, black 40%, transparent 90%);
    -webkit-mask-image: radial-gradient(circle at center, black 40%, transparent 90%);
    opacity: 0.6;
    transform: perspective(1000px) rotateX(10deg) translateY(-50px) scale(1.1);
    /* Subtle 3D tilt */
}

/* --- TYPOGRAPHY --- */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-main);
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.text-white {
    color: var(--text-main);
}

.text-accent {
    color: var(--accent-color);
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* --- BUTTONS --- */
.btn {
    display: inline-block;
    padding: 16px 36px;
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-speed) var(--ease-out-cubic);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--text-main);
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(225, 6, 0, 0.3);
    animation: pulseButton 4s infinite cubic-bezier(0.66, 0, 0, 1);
}

@keyframes pulseButton {
    0% {
        box-shadow: 0 0 20px rgba(225, 6, 0, 0.3);
    }

    50% {
        box-shadow: 0 0 35px rgba(225, 6, 0, 0.5);
    }

    100% {
        box-shadow: 0 0 20px rgba(225, 6, 0, 0.3);
    }
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    box-shadow: 0 0 40px rgba(225, 6, 0, 0.7);
    transform: translateY(-2px) scale(1.02);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--text-main);
    color: var(--text-main);
    position: relative;
    z-index: 1;
}

.btn-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background-color: var(--text-main);
    z-index: -1;
    transition: width 0.4s var(--ease-out-cubic);
}

.btn-outline:hover {
    color: var(--bg-color);
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.btn-outline:hover::before {
    width: 100%;
}

.btn-large {
    padding: 20px 50px;
    font-size: 1.1rem;
}

/* --- NAVIGATION --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(11, 11, 11, 0.6);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    transition: background-color 0.3s, border-color 0.3s;
}

.navbar.scrolled {
    background-color: rgba(5, 5, 5, 0.95);
    border-bottom: 1px solid rgba(225, 6, 0, 0.3);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.05em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a:not(.btn) {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.nav-links a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-color);
    transition: width 0.3s var(--ease-out-cubic);
}

.nav-links a:not(.btn):hover {
    color: var(--text-main);
}

.nav-links a:not(.btn):hover::after {
    width: 100%;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-main);
    transition: all 0.3s;
}

/* --- HERO SECTION --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    position: relative;
    perspective: 1000px;
    /* Enable 3D space */
}

.hero-content {
    max-width: 900px;
    z-index: 2;
    transform-style: preserve-3d;
    /* Maintain 3D for children */
}

/* Staggered Entrance Animations */
.hero-headline,
.hero-subheadline,
.hero-text,
.hero-buttons {
    opacity: 0;
    transform: translateY(30px);
}

.hero-anim-active .hero-headline {
    animation: heroReveal 0.8s var(--ease-out-cubic) forwards;
}

.hero-anim-active .hero-subheadline {
    animation: heroReveal 0.8s var(--ease-out-cubic) 0.3s forwards;
}

.hero-anim-active .hero-text {
    animation: heroReveal 0.8s var(--ease-out-cubic) 0.6s forwards;
}

.hero-anim-active .hero-buttons {
    animation: heroReveal 0.8s var(--ease-out-cubic) 0.9s forwards;
}

@keyframes heroReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-headline {
    font-size: clamp(3rem, 7vw, 6.5rem);
    margin-bottom: 25px;
    line-height: 1;
    letter-spacing: -0.04em;
    will-change: transform, opacity;
}

.hero-subheadline {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    font-weight: 400;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 800px;
    will-change: transform, opacity;
}

.hero-text {
    font-size: 1.1rem;
    max-width: 600px;
    margin-bottom: 50px;
    border-left: 2px solid var(--accent-color);
    padding-left: 20px;
    color: #ccc;
    will-change: transform, opacity;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    will-change: transform, opacity;
}


/* --- SECTIONS (Reusable) --- */
section {
    padding: 120px 0;
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 80px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 60px;
    height: 4px;
    background-color: var(--accent-color);
}

/* --- SCROLL REVEAL UTILITY --- */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out-cubic), transform 0.8s var(--ease-out-cubic);
    will-change: opacity, transform;
}

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


/* --- SERVICES GRID --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.service-card {
    background-color: var(--card-bg);
    padding: 50px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) var(--ease-out-cubic);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: #333;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6);
}

.service-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 1px solid transparent;
    transition: border-color 0.3s;
    pointer-events: none;
}

.service-card:hover::after {
    border-color: rgba(225, 6, 0, 0.3);
    box-shadow: inset 0 0 30px rgba(225, 6, 0, 0.05);
    /* Inner red glow */
}

.service-card h3 {
    font-size: 1.8rem;
    margin-bottom: 25px;
}

.service-card ul li {
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
    font-size: 1rem;
    color: #ccc;
}

.service-card ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* --- SOLUTIONS GRID --- */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 50px;
}

.solution-item {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 40px;
    transition: border-color 0.3s;
}

.solution-item:hover {
    border-bottom-color: var(--accent-color);
}

.solution-item h3 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

/* --- PROCESS TIMELINE --- */
.process-timeline {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-top: 50px;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color) 20%, var(--border-color) 80%, transparent);
    z-index: 0;
}

.process-step {
    flex: 1;
    position: relative;
    z-index: 1;
    background-color: var(--bg-color);
    padding-right: 20px;
}

.step-number {
    font-size: 5rem;
    font-weight: 800;
    color: #1a1a1a;
    margin-bottom: -30px;
    position: relative;
    z-index: 0;
    transition: color 0.3s;
}

.process-step:hover .step-number {
    color: #222;
}

.process-step h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
}

/* --- CONTACT FORM --- */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    background-color: #111;
    border: 1px solid var(--border-color);
    padding: 15px;
    color: var(--text-main);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* --- FOOTER --- */
.footer {
    padding: 80px 0 40px;
    background-color: #050505;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-logo {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-main);
    text-transform: uppercase;
    margin-bottom: 20px;
    display: block;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 1rem;
    color: var(--text-main);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: #666;
}

.footer-col a:hover {
    color: var(--accent-color);
}

.copyright {
    text-align: center;
    color: #444;
    padding-top: 40px;
    border-top: 1px solid #111;
}


/* --- RESPONSIVE --- */
@media (max-width: 900px) {
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--bg-color);
        flex-direction: column;
        justify-content: center;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        border-top: 1px solid var(--border-color);
        z-index: 999;
    }

    .nav-links.active {
        transform: translateX(0);
    }

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

    .hero-headline {
        font-size: 3.5rem;
    }

    .solutions-grid,
    .contact-container,
    .case-study-showcase {
        grid-template-columns: 1fr;
    }

    .process-timeline {
        flex-direction: column;
    }

    .process-timeline::before {
        display: none;
    }

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