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

:root {
    /* Colors - Emergence brand palette */
    --color-primary: #FF5B04;        /* Pulse Ember */
    --color-black: #1D1D1D;          /* Almost Black */
    --color-white: #FCFBF4;          /* Ivory */
    --color-gray-100: #F5F4EF;
    --color-gray-200: #E8E7E2;
    --color-gray-300: #D1D0CB;
    --color-gray-700: #4A4A4A;
    --color-gray-800: #2E2E2E;
    --color-gray-900: #232323;

    /* Typography */
    --font-sans: 'Circular Std', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-gray-900);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

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

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

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: 1.25rem;
}

.lead-text {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--color-gray-800);
}

.body-text {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-gray-700);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
    transition: var(--transition-base);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-black);
}

.logo-sub {
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--color-gray-700);
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-gray-700);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: 0.6rem 1.5rem;
    background-color: var(--color-black);
    color: var(--color-white) !important;
    border-radius: 6px;
    transition: all var(--transition-base);
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
}

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

.btn-primary:hover {
    background-color: #E55004;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(255, 91, 4, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

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

/* Hero Section */
.hero {
    padding: 12rem 0 8rem;
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-900) 100%);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 91, 4, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 91, 4, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero-title .highlight {
    color: var(--color-primary);
    position: relative;
}

.hero-subtitle {
    font-size: 1.35rem;
    line-height: 1.6;
    color: var(--color-gray-300);
    margin-bottom: 3rem;
    max-width: 800px;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.section-title {
    max-width: 800px;
    margin: 0 auto;
}

/* Shift Section */
.shift-section {
    background-color: var(--color-gray-100);
}

.shift-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 4rem;
}

.shift-card {
    background-color: var(--color-white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-base);
}

.shift-card:hover {
    transform: translateY(-5px);
}

.shift-card.highlight-card {
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-800) 100%);
    color: var(--color-white);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.shift-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.shift-card.highlight-card .shift-label {
    color: var(--color-primary);
}

.shift-card h3 {
    margin-bottom: 1rem;
    font-size: 2rem;
}

.shift-card.highlight-card p {
    color: var(--color-gray-300);
}

.shift-arrow {
    font-size: 3rem;
    color: var(--color-primary);
    font-weight: 300;
}

.shift-thesis {
    background-color: var(--color-white);
    padding: 3rem;
    border-radius: 12px;
    border-left: 4px solid var(--color-primary);
}

.thesis-statement {
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--color-gray-800);
}

.thesis-statement strong {
    color: var(--color-black);
}

/* Why Now Section */
.why-now-section {
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-900) 100%);
    color: var(--color-white);
}

.why-now-section .section-title {
    color: var(--color-white);
}

.why-now-content {
    max-width: 1100px;
    margin: 0 auto;
}

.why-now-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.why-now-card {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-base);
}

.why-now-card:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.why-now-card h3 {
    margin-bottom: 1rem;
    color: var(--color-white);
    font-size: 1.5rem;
}

.why-now-card p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.7;
}

.why-now-statement {
    background-color: rgba(0, 0, 0, 0.2);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.why-now-statement p {
    font-size: 1.35rem;
    line-height: 1.7;
    color: var(--color-white);
    font-weight: 500;
    max-width: 800px;
    margin: 0 auto;
}

/* Mission Section */
.mission-section {
    background-color: var(--color-white);
}

.mission-content {
    max-width: 900px;
    margin: 0 auto 4rem;
}

.mission-primary {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.milestone-text {
    background-color: var(--color-gray-100);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
    margin-top: 1rem;
}

.milestone-text strong {
    color: var(--color-primary);
}

.mission-impact {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.impact-item {
    padding: 2rem;
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-800) 100%);
    color: var(--color-white);
    border-radius: 12px;
    transition: transform var(--transition-base);
}

.impact-item:hover {
    transform: translateY(-5px);
}

.impact-item h4 {
    margin-bottom: 0.75rem;
    color: var(--color-primary);
}

.impact-item p {
    color: var(--color-gray-300);
    font-size: 0.95rem;
}

/* Belief Section */
.belief-section {
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-900) 100%);
    color: var(--color-white);
}

.belief-section .section-title {
    color: var(--color-white);
}

.belief-intro {
    font-size: 1.25rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--color-gray-300);
}

.belief-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.belief-card {
    background-color: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.belief-card:hover {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--color-primary);
    transform: translateY(-5px);
}

.belief-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.belief-card h3 {
    margin-bottom: 1rem;
    color: var(--color-white);
}

.belief-card p {
    color: var(--color-gray-300);
    line-height: 1.7;
}

/* Team Leadership Section */
.team-section {
    background-color: var(--color-white);
}

.team-content {
    max-width: 1000px;
    margin: 0 auto;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.team-member {
    background-color: var(--color-gray-100);
    padding: 3rem;
    border-radius: 12px;
    transition: all var(--transition-base);
    border-left: 4px solid transparent;
}

.team-member:hover {
    border-left-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.team-role {
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.team-member h3 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: var(--color-black);
}

.team-affiliation {
    font-size: 1rem;
    color: var(--color-gray-700);
    margin-bottom: 1rem;
    font-weight: 500;
}

.team-bio {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-gray-700);
}

/* Research Section */
.research-section {
    background-color: var(--color-gray-100);
}

.research-content {
    max-width: 1000px;
    margin: 0 auto;
}

.research-intro {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-gray-700);
    text-align: center;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.research-areas {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.research-area {
    background-color: var(--color-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.research-area:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.research-area h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--color-black);
}

.research-area p {
    color: var(--color-gray-700);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.research-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.research-link:hover {
    gap: 0.75rem;
    color: #E55004;
}

/* Work Section */
.work-section {
    background-color: var(--color-gray-100);
}

.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.work-card {
    background-color: var(--color-white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
    border-top: 3px solid transparent;
}

.work-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
    border-top-color: var(--color-primary);
}

.work-card h3 {
    margin-bottom: 1rem;
    font-size: 1.35rem;
    color: var(--color-black);
}

.work-card p {
    color: var(--color-gray-700);
    line-height: 1.7;
}

/* India Section */
.india-section {
    background-color: var(--color-white);
}

.india-content {
    max-width: 900px;
    margin: 0 auto;
}

.india-content .lead-text {
    text-align: center;
    margin-bottom: 4rem;
}

.india-pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.pillar {
    text-align: center;
    padding: 2rem;
}

.pillar h4 {
    margin-bottom: 0.75rem;
    color: var(--color-black);
    font-size: 1.25rem;
}

.pillar p {
    color: var(--color-gray-700);
}

/* Talent Section */
.talent-section {
    background-color: var(--color-gray-100);
}

.talent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.talent-card {
    background-color: var(--color-white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: all var(--transition-base);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.talent-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.talent-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.talent-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
    color: var(--color-black);
}

.talent-card p {
    color: var(--color-gray-700);
    line-height: 1.6;
}

/* Contact Section */
.contact-section {
    background: linear-gradient(135deg, var(--color-black) 0%, var(--color-gray-900) 100%);
    color: var(--color-white);
    text-align: center;
    padding: 6rem 0;
}

.contact-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1.5rem;
    color: var(--color-white);
}

.contact-content p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.contact-cta .btn-primary:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* Footer */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-logo .logo-text {
    color: var(--color-white);
    font-size: 1.5rem;
}

.footer-logo .logo-sub {
    color: var(--color-gray-300);
}

.footer-tagline {
    margin-top: 1rem;
    color: var(--color-gray-300);
    font-size: 0.95rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    margin-bottom: 1rem;
    color: var(--color-white);
    font-size: 1rem;
}

.footer-column a {
    display: block;
    margin-bottom: 0.75rem;
    color: var(--color-gray-300);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
    color: var(--color-gray-300);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-links {
        gap: 1rem;
    }

    .shift-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .shift-arrow {
        transform: rotate(90deg);
        text-align: center;
    }

    .why-now-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .mission-impact {
        grid-template-columns: 1fr;
    }

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

    .team-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .research-areas {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .india-pillars {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 640px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

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

    .hero {
        padding: 8rem 0 4rem;
    }

    .hero-cta {
        flex-direction: column;
    }

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

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

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

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}