/* ===================================
   Sentry Technologies - Design System
   =================================== */

/* CSS Custom Properties */
:root {
    /* Colors */
    --color-void-black: #0A0A0A;
    --color-pure-black: #000000;
    --color-white: #FFFFFF;
    --color-sentry-amber: #F59E0B;
    --color-sentry-amber-hover: #D97706;
    --color-steel-gray: #1A1A1A;
    --color-border-gray: #2A2A2A;
    --color-text-muted: #9CA3AF;

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

    /* Spacing */
    --section-padding: 120px;
    --container-max: 1200px;
    --container-padding: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
    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-white);
    background-color: var(--color-void-black);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Typography */
.section-label {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-sentry-amber);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 24px;
}

.section-accent {
    width: 60px;
    height: 3px;
    background-color: var(--color-sentry-amber);
    margin-top: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 16px 32px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-medium);
}

.btn-primary {
    background-color: var(--color-sentry-amber);
    color: var(--color-pure-black);
    border-color: var(--color-sentry-amber);
}

.btn-primary:hover {
    background-color: var(--color-sentry-amber-hover);
    border-color: var(--color-sentry-amber-hover);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-outline:hover {
    background-color: var(--color-white);
    color: var(--color-pure-black);
    transform: translateY(-2px);
}

.btn-large {
    padding: 20px 48px;
    font-size: 16px;
}

/* ===================================
   Navigation
   =================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 24px 0;
    transition: all var(--transition-medium);
}

.nav.scrolled {
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 16px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo img {
    height: 40px;
    width: auto;
}

.nav-logo-text {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-white);
}

.nav-links {
    display: flex;
    gap: 48px;
}

.nav-links a {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-white);
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-sentry-amber);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-fast);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--color-pure-black);
    overflow: hidden;
}

.hero-grid-overlay {
    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: 60px 60px;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 var(--container-padding);
    padding-bottom: 100px;
    max-width: 900px;
}

.hero-logo {
    margin-bottom: 48px;
}

.hero-logo img {
    height: 120px;
    width: auto;
    margin: 0 auto;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(40px, 8vw, 80px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.6;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--color-text-muted);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    z-index: 0;
    transition: opacity 0.3s ease;
}

.hero-scroll-indicator.hidden {
    opacity: 0;
    pointer-events: none;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-sentry-amber), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* Hero Animations */
.animate-fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

.animate-fade-in-delay-1 {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.animate-fade-in-delay-2 {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.animate-fade-in-delay-3 {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

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

/* ===================================
   Section Base
   =================================== */
.section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header .section-accent {
    margin: 24px auto 0;
}

/* ===================================
   About Section
   =================================== */
.about {
    background-color: var(--color-void-black);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text {
    color: var(--color-text-muted);
    margin-bottom: 24px;
    font-size: 18px;
}

.about-location {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-sentry-amber);
    font-weight: 500;
    margin-top: 32px;
}

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

.about-visual-box {
    position: relative;
    width: 100%;
    max-width: 400px;
    border-radius: 8px;
    overflow: hidden;
}

.about-map {
    width: 100%;
    height: auto;
    display: block;
}

/* ===================================
   Solutions Section
   =================================== */
.solutions {
    background-color: var(--color-pure-black);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.solution-card {
    background-color: var(--color-steel-gray);
    border: 1px solid var(--color-border-gray);
    padding: 40px 32px;
    transition: all var(--transition-medium);
}

.solution-card:hover {
    border-color: var(--color-sentry-amber);
    transform: translateY(-4px);
}

.solution-icon {
    color: var(--color-sentry-amber);
    margin-bottom: 24px;
}

.solution-title {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.solution-description {
    color: var(--color-text-muted);
    font-size: 14px;
    line-height: 1.7;
}

/* ===================================
   Applications Section
   =================================== */
.applications {
    background-color: var(--color-void-black);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.application-card {
    background-color: var(--color-steel-gray);
    border: 1px solid var(--color-border-gray);
    padding: 48px;
    transition: all var(--transition-medium);
}

.application-card:hover {
    border-color: var(--color-sentry-amber);
    background-color: rgba(245, 158, 11, 0.05);
}

.application-icon {
    color: var(--color-sentry-amber);
    margin-bottom: 24px;
}

.application-title {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.application-description {
    color: var(--color-text-muted);
    font-size: 16px;
    line-height: 1.6;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background-color: var(--color-pure-black);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 80px;
    align-items: center;
}

.contact-text {
    color: var(--color-text-muted);
    font-size: 18px;
    margin-bottom: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-item svg {
    color: var(--color-sentry-amber);
    flex-shrink: 0;
    margin-top: 4px;
}

.contact-item > div {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.contact-value {
    font-size: 16px;
    color: var(--color-white);
    line-height: 1.5;
}

.contact-link {
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: var(--color-sentry-amber);
}

.contact-cta {
    display: flex;
    align-items: center;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--color-pure-black);
    border-top: 1px solid var(--color-border-gray);
    padding: 64px 0 40px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.footer-logo img {
    height: 32px;
    width: auto;
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-sentry-amber);
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border-gray);
    width: 100%;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: var(--color-text-muted);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 13px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--color-white);
}

/* ===================================
   Scroll Reveal Animation
   =================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }

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

@media (max-width: 768px) {
    :root {
        --section-padding: 64px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background-color: var(--color-pure-black);
        padding: 24px;
        border-top: 1px solid var(--color-border-gray);
    }

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

    .nav-links a {
        padding: 16px 0;
        border-bottom: 1px solid var(--color-border-gray);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }

    .hero-logo img {
        height: 90px;
    }

    .hero-ctas {
        flex-direction: column;
        align-items: center;
    }

    .hero-ctas .btn {
        width: 100%;
        max-width: 280px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-visual {
        order: -1;
    }

    .about-visual-box {
        max-width: 300px;
    }

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

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .contact-cta {
        justify-content: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 36px;
    }

    .solution-card,
    .application-card {
        padding: 32px 24px;
    }

    .btn {
        padding: 14px 28px;
    }

    .btn-large {
        padding: 16px 36px;
    }
}