/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
    /* Pure Black & White Color Scheme */
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-dark: #333333;
    --color-gray-medium: #666666;
    --color-gray-light: #cccccc;
    --color-gray-ultra-light: #f5f5f5;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --border-radius-sm: 0.5rem;
    --border-radius-md: 1rem;
    
    /* Shadows */
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-black);
    background-color: var(--color-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
    margin-bottom: var(--spacing-sm);
}

.large-text {
    font-size: 1.25rem;
    font-weight: 500;
}

.highlight {
    font-weight: 900;
    color: var(--color-black);
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-medium);
    border-bottom: 1px solid var(--color-gray-light);
}

.navbar.scrolled {
    background-color: var(--color-white);
    box-shadow: var(--shadow-light);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-weight: 600;
    color: var(--color-black);
}

.logo-img {
    height: 40px;
    width: auto;
    filter: brightness(0); /* Makes logo black for better visibility */
}

.logo-fallback {
    display: none;
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-black);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--color-black);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-black);
    transition: var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: var(--color-black);
    margin: 3px 0;
    transition: var(--transition-fast);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background-color: var(--color-black);
    color: var(--color-white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

.motion-lines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.motion-lines::before,
.motion-lines::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 100px;
    background: linear-gradient(transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: motionLine 8s linear infinite;
}

.motion-lines::before {
    left: 20%;
    animation-delay: 0s;
}

.motion-lines::after {
    left: 80%;
    animation-delay: 4s;
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: var(--spacing-xl) 0;
}

.hero-title {
    max-width: 800px;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.5s both;
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.7s both;
}

/* ===== BUTTONS ===== */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.cta-button.primary {
    background-color: var(--color-white);
    color: var(--color-black);
}

.cta-button.primary:hover {
    background-color: var(--color-gray-light);
    transform: translateY(-2px);
}

.cta-button.secondary {
    background-color: transparent;
    color: var(--color-black);
    border: 2px solid var(--color-black);
}

.cta-button.secondary:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.cta-button.large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
}

.cta-button i {
    transition: var(--transition-fast);
}

.cta-button:hover i {
    transform: translateX(5px);
}

/* ===== SECTIONS ===== */
section {
    padding: var(--spacing-xl) 0;
}

.section-shift {
    background-color: var(--color-white);
}

.shift-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

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

.bridge-graphic {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
}

.bridge-element {
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    background-color: var(--color-gray-ultra-light);
    border: 2px solid var(--color-gray-light);
    min-width: 150px;
}

.bridge-element.strategy {
    background-color: var(--color-gray-medium);
    color: var(--color-white);
}

.bridge-element.execution {
    background-color: var(--color-black);
    color: var(--color-white);
}

.bridge-connector {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.bridge-line {
    width: 50px;
    height: 2px;
    background-color: var(--color-black);
}

.bridge-arrow {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-black);
}

/* ===== TECH SECTION ===== */
.section-tech {
    background-color: var(--color-gray-ultra-light);
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-medium);
}

.tech-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.benefit-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition-medium);
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

/* ===== FRAMEWORK SECTION ===== */
.section-framework {
    background-color: var(--color-white);
}

.framework-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.framework-column {
    text-align: center;
    padding: var(--spacing-md);
}

.framework-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

/* ===== STRATEGY SECTION ===== */
.section-strategy {
    background-color: var(--color-gray-ultra-light);
}

.strategy-questions {
    display: grid;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.question-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    box-shadow: var(--shadow-light);
}

.question-number {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-black);
    min-width: 50px;
}

.strategy-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ===== OPPORTUNITIES SECTION ===== */
.section-opportunities {
    background-color: var(--color-white);
}

.opportunities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.opportunity-card {
    background-color: var(--color-gray-ultra-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    text-align: center;
    transition: var(--transition-medium);
    border: 2px solid transparent;
}

.opportunity-card:hover {
    border-color: var(--color-black);
    background-color: var(--color-white);
}

.opportunity-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

/* ===== INVITATION SECTION ===== */
.section-invitation {
    background-color: var(--color-black);
    color: var(--color-white);
    text-align: center;
}

.invitation-content {
    max-width: 600px;
    margin: 0 auto;
}

.invitation-text {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-light);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo .logo-img {
    height: 32px;
    filter: brightness(0); /* Makes logo black */
}

.footer-logo .logo-fallback {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-black);
    display: none;
}

.footer-tagline {
    font-weight: 500;
    color: var(--color-gray-medium);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-link {
    text-decoration: none;
    color: var(--color-gray-medium);
    font-weight: 500;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-black);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-light);
    color: var(--color-gray-medium);
}

/* ===== MODALS ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--color-white);
    margin: 5% auto;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

.close {
    position: absolute;
    right: var(--spacing-md);
    top: var(--spacing-md);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: var(--color-gray-medium);
    transition: var(--transition-fast);
}

.close:hover {
    color: var(--color-black);
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.modal-form input,
.modal-form textarea {
    padding: var(--spacing-sm);
    border: 2px solid var(--color-gray-light);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.modal-form input:focus,
.modal-form textarea:focus {
    outline: none;
    border-color: var(--color-black);
}

.modal-form button {
    margin-top: var(--spacing-sm);
}

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

@keyframes gridMove {
    from {
        transform: translate(0, 0);
    }
    to {
        transform: translate(50px, 50px);
    }
}

@keyframes motionLine {
    from {
        top: -100px;
    }
    to {
        top: 100vh;
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--color-white);
        width: 100%;
        text-align: center;
        transition: var(--transition-medium);
        box-shadow: var(--shadow-medium);
        padding: var(--spacing-md) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

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

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .shift-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .bridge-graphic {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .bridge-connector {
        flex-direction: column;
    }

    .bridge-line {
        width: 2px;
        height: 30px;
    }

    .bridge-arrow {
        transform: rotate(90deg);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 2rem;
    }

    .modal-content {
        margin: 10% auto;
        width: 95%;
        padding: var(--spacing-md);
    }

    .question-card {
        flex-direction: column;
        text-align: center;
    }

    .question-number {
        margin-bottom: var(--spacing-xs);
    }
}

/* ===== SCROLL REVEAL ANIMATIONS ===== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease;
}

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

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}