/* NRIDL Global Styles */

/* CSS Variables for consistent theming */
:root {
    /* Color Palette - Sophisticated and Modern */
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #0f4c75;
    --accent-light: #3282b8;
    --text-primary: #1a1a2e;
    --text-secondary: #5a5a5a;
    --text-light: #ffffff;
    --bg-primary: #ffffff;
    --bg-secondary: #f7f9fc;
    --bg-dark: #1a1a2e;
    --border-color: #e8edf2;
    --overlay-color: rgba(26, 26, 46, 0.88);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-accent: 'Montserrat', sans-serif;
    
    /* Spacing - Enhanced for professional layout */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows - Enhanced depth */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-top: 90px;
}

/* Global Hero Section Fix - Remove white gap with fixed navigation */
.hero-section {
    margin-top: -90px;
}

/* Typography - Professional and Elegant */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 300;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: #1a1a1a;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
    margin-bottom: clamp(1.5rem, 3vw, 2rem);
}

h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
    margin-bottom: clamp(1.5rem, 3vw, 2rem);
}

h3 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    letter-spacing: -0.01em;
    margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

h4 {
    font-size: 1.125rem;
    font-weight: 500;
    font-family: var(--font-accent);
    letter-spacing: 0.02em;
    margin-bottom: 0.75rem;
    color: #333333;
}

h5 {
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-accent);
    letter-spacing: 0.02em;
}

h6 {
    font-size: 0.875rem;
    font-family: var(--font-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
    color: #666666;
    line-height: 1.9;
    font-weight: 300;
    max-width: 75ch;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-light);
}

/* Container and Layout - Professional spacing */
.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 3rem);
}

.container-narrow {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 3rem);
}

.container-wide {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 5vw, 3rem);
}

/* Section Spacing - Enhanced for professional look */
section {
    padding: clamp(4rem, 10vw, 8rem) 0;
}

.section-title {
    text-align: center;
    margin-bottom: clamp(3rem, 6vw, 5rem);
}

.section-subtitle {
    text-align: center;
    color: #999999;
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    margin-top: 0.5rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

/* Buttons - Refined and professional */
.btn {
    display: inline-block;
    padding: 1.125rem 2.5rem;
    font-family: var(--font-accent);
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: transform var(--transition-medium);
}

.btn:hover::before {
    transform: translateX(0);
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--text-light);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--text-light);
}

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

.btn-secondary:hover {
    background-color: var(--accent-color);
    color: var(--text-light);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background-color: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.4);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.375rem 3rem;
    font-size: 0.9375rem;
}

/* Cards - Enhanced with better depth */
.card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    transition: all var(--transition-medium);
    border: 1px solid var(--border-color);
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
    border-color: transparent;
}

/* Grid System - Enhanced responsiveness */
.grid {
    display: grid;
    gap: clamp(1.5rem, 3vw, 2.5rem);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
}

/* Utilities */
.text-center {
    text-align: center;
}

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

.bg-dark {
    background-color: var(--bg-dark);
}

.bg-light {
    background-color: var(--bg-secondary);
}

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

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

.slide-in-left {
    animation: slideInLeft 0.8s ease-out forwards;
}

.slide-in-right {
    animation: slideInRight 0.8s ease-out forwards;
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

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

/* Responsive Design - Enhanced for all devices */
@media (max-width: 1024px) {
    :root {
        --spacing-lg: 3.5rem;
        --spacing-xl: 5rem;
    }
    
    section {
        padding: clamp(3rem, 8vw, 6rem) 0;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    body {
        padding-top: 70px;
    }
    
    .container,
    .container-narrow,
    .container-wide {
        padding: 0 1.5rem;
    }
    
    section {
        padding: clamp(2.5rem, 6vw, 4rem) 0;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    h1 {
        margin-bottom: 1.5rem;
    }
    
    h2 {
        margin-bottom: 1.25rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 15px;
    }
    
    .btn {
        padding: 1rem 2rem;
        font-size: 0.8125rem;
    }
    
    .btn-large {
        padding: 1.125rem 2.25rem;
        font-size: 0.875rem;
    }
}

/* Print Styles */
@media print {
    nav,
    footer,
    .btn,
    video {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}