/* YPO Chennai - Design System */

:root {
    /* Colors */
    --color-primary: #0F172A;
    /* Deep Navy */
    --color-primary-light: #1e293b;
    --color-accent: #D4AF37;
    /* Gold */
    --color-accent-hover: #b5952f;
    --color-bg: #FFFFFF;
    --color-bg-off: #F8FAFC;
    --color-text-main: #334155;
    /* Dark Charcoal */
    --color-text-light: #64748b;
    --color-white: #FFFFFF;
    --color-border: #e2e8f0;

    /* Typography */
    --font-main: 'Inter', sans-serif;
    --line-height-base: 1.6;
    --line-height-heading: 1.2;

    /* Spacing */
    --spacing-xs: 0.5rem;
    /* 8px */
    --spacing-sm: 1rem;
    /* 16px */
    --spacing-md: 2rem;
    /* 32px */
    --spacing-lg: 4rem;
    /* 64px */
    --spacing-xl: 8rem;
    /* 128px */

    /* Container */
    --container-width: 1200px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: var(--line-height-base);
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-primary);
    line-height: var(--line-height-heading);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

/* Layout Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

.section-bg-alt {
    background-color: var(--color-bg-off);
}

.text-center {
    text-align: center;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-weight: 600;
    border-radius: 4px;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
}

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

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

/* Header & Navigation */
.header {
    height: var(--header-height);
    background-color: var(--color-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
  
}

.logo img {
    height: 60px;
    /* Adjusted for visibility */
    width: auto;
   
}

.nav-list {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-text-main);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-primary);
}

/* Mobile Menu */
@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        padding: var(--spacing-md);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }

    .nav.active {
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .mobile-toggle {
        display: block;
    }
}

/* Hero Section */
.hero {
    background-color: var(--color-primary);
    background-image: linear-gradient(rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.8)), url('../../assets/hero-bg.png');
    background-size: cover;
    background-position: center;
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    display: none;
    /* Removed previous radial gradient in favor of image overlay */
}

.hero-title {
    font-size: 3rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #cbd5e1;
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.btn-hero {
    background-color: var(--color-accent);
    color: var(--color-primary);
    border: none;
}

.btn-hero:hover {
    background-color: var(--color-accent-hover);
}

/* Cards & Grid */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

.card-icon {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

/* Editorial Content */
.content-block {
    max-width: 800px;
    margin: 0 auto;
}

.quote-box {
    border-left: 4px solid var(--color-accent);
    padding-left: var(--spacing-md);
    font-style: italic;
    font-size: 1.2rem;
    color: var(--color-primary);
    margin: var(--spacing-md) 0;
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.footer h4 {
    color: var(--color-accent);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.footer a {
    color: #94a3b8;
    display: block;
    margin-bottom: 0.5rem;
}

.footer a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: var(--spacing-md);
    text-align: center;
    color: #64748b;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .grid-2 {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}