/*
 * EMSTAC - Contemporary Tech Company Design System
 * Navy Blue Theme with Sharp Contrast
 */

/* ============================================
   CSS VARIABLES - Navy Blue Design System
   ============================================ */
:root {
    /* Primary Navy Blue Palette */
    --navy-950: #001f3f;        /* Darkest - Hero backgrounds */
    --navy-900: #0a2540;        /* Very Dark - Headers, emphasis */
    --navy-800: #0d3a5c;        /* Dark - Navigation, footers */
    --navy-700: #1e3a5f;        /* Medium Dark - Sidebar, panels */
    --navy-600: #2E5077;        /* Medium - Borders, dividers */
    --navy-500: #4A7BA7;        /* Medium Light - Hover states */
    --navy-400: #6B9BC3;        /* Light - Icons, accents */
    --navy-300: #8CB4D9;        /* Lighter - Disabled states */
    --navy-200: #B3D4E8;        /* Very Light - Backgrounds */
    --navy-100: #D9EAF7;        /* Lightest - Subtle backgrounds */
    --navy-50: #EBF5FB;         /* Almost white - Sections */
    
    /* Accent Colors for CTAs and Highlights */
    --accent-primary: #0077B6;      /* Bright blue for primary actions */
    --accent-primary-hover: #005F8D; /* Darker on hover */
    --accent-secondary: #00B4D8;    /* Lighter blue for secondary */
    --accent-success: #06A77D;      /* Success green */
    --accent-warning: #F59E0B;      /* Warning amber */
    --accent-error: #DC2626;        /* Error red */
    --accent-info: #0EA5E9;         /* Info sky blue */
    
    /* Neutrals with High Contrast */
    --white: #FFFFFF;
    --black: #000000;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Text Colors - High Contrast */
    --text-primary: #001f3f;        /* Dark navy for body text */
    --text-secondary: #0a2540;      /* Slightly lighter for secondary text */
    --text-muted: #4B5563;          /* Muted gray for less important text */
    --text-light: #6B7280;          /* Light text on dark backgrounds */
    --text-inverse: #FFFFFF;        /* White text on dark backgrounds */
    
    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #EBF5FB;
    --bg-dark: #001f3f;
    --bg-navy: #0a2540;
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;      /* 4px */
    --spacing-sm: 0.5rem;       /* 8px */
    --spacing-md: 1rem;         /* 16px */
    --spacing-lg: 1.5rem;       /* 24px */
    --spacing-xl: 2rem;         /* 32px */
    --spacing-2xl: 3rem;        /* 48px */
    --spacing-3xl: 4rem;        /* 64px */
    --spacing-4xl: 6rem;        /* 96px */
    
    /* Border Radius */
    --radius-sm: 0.25rem;       /* 4px */
    --radius-md: 0.5rem;        /* 8px */
    --radius-lg: 0.75rem;       /* 12px */
    --radius-xl: 1rem;          /* 16px */
    --radius-2xl: 1.5rem;       /* 24px */
    --radius-full: 9999px;      /* Fully rounded */
    
    /* Shadows - Enhanced for depth */
    --shadow-sm: 0 1px 2px 0 rgba(0, 31, 63, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 31, 63, 0.1), 0 2px 4px -1px rgba(0, 31, 63, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 31, 63, 0.15), 0 4px 6px -2px rgba(0, 31, 63, 0.08);
    --shadow-xl: 0 20px 25px -5px rgba(0, 31, 63, 0.2), 0 10px 10px -5px rgba(0, 31, 63, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 31, 63, 0.35);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 31, 63, 0.06);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography Scale */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Courier New', monospace;
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    --font-black: 900;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: var(--font-bold);
    line-height: 1.2;
    color: var(--navy-900);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 3.5rem; font-weight: var(--font-extrabold); letter-spacing: -0.02em; }
h2 { font-size: 2.5rem; font-weight: var(--font-bold); letter-spacing: -0.01em; }
h3 { font-size: 2rem; font-weight: var(--font-bold); }
h4 { font-size: 1.5rem; font-weight: var(--font-semibold); }
h5 { font-size: 1.25rem; font-weight: var(--font-semibold); }
h6 { font-size: 1rem; font-weight: var(--font-semibold); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

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

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

/* ============================================
   NAVIGATION BAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.75rem;
    font-weight: var(--font-extrabold);
    font-family: var(--font-display);
    color: var(--navy-900);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: translateY(-2px);
    color: var(--navy-900);
}

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

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: var(--font-medium);
    font-size: 0.95rem;
    position: relative;
    padding: var(--spacing-sm) 0;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-base);
}

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

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

.nav-links a.active {
    color: var(--accent-primary);
    font-weight: var(--font-semibold);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-lg);
    font-weight: var(--font-semibold);
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-primary-hover) 100%);
    color: var(--text-inverse);
    box-shadow: 0 4px 14px 0 rgba(0, 119, 182, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(0, 119, 182, 0.45);
    color: var(--text-inverse);
}

.btn-secondary {
    background: var(--navy-900);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: var(--navy-800);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--text-inverse);
}

.btn-outline {
    background: transparent;
    color: var(--navy-900);
    border: 2px solid var(--navy-900);
}

.btn-outline:hover {
    background: var(--navy-900);
    color: var(--text-inverse);
    transform: translateY(-2px);
}

.btn-light {
    background: var(--white);
    color: var(--navy-900);
    border: 2px solid var(--white);
}

.btn-light:hover {
    background: transparent;
    color: var(--white);
    transform: translateY(-2px);
}

.btn-primary-small,
.admin-link {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
}

.admin-link {
    background: var(--gray-100);
    color: var(--text-secondary);
}

.admin-link:hover {
    background: var(--gray-200);
    color: var(--text-primary);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

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

main {
    margin-top: 80px;
    min-height: calc(100vh - 80px);
}

.section {
    padding: var(--spacing-4xl) 0;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 100%);
    color: var(--text-inverse);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--navy-400) 50%, transparent 100%);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-brand {
    max-width: 350px;
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.footer-tagline {
    color: var(--navy-200);
    line-height: 1.7;
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

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

.footer-column a {
    display: block;
    color: var(--navy-200);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent-secondary);
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--navy-700);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-bottom p {
    color: var(--navy-300);
    margin: 0;
    font-size: 0.9rem;
}

/* ============================================
   MOBILE MENU
   ============================================ */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--navy-900);
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--navy-900);
    margin: 5px 0;
    transition: all var(--transition-base);
}

/* ============================================
   CARDS & COMPONENTS
   ============================================ */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-navy { color: var(--navy-900); }
.text-accent { color: var(--accent-primary); }
.text-muted { color: var(--text-muted); }
.text-white { color: var(--white); }

.bg-navy { background-color: var(--navy-900); }
.bg-navy-light { background-color: var(--navy-100); }
.bg-white { background-color: var(--white); }
.bg-gray { background-color: var(--gray-50); }

/* Spacing utilities */
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    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);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Animation classes */
.animate-fade-in { animation: fadeIn 0.6s ease-out forwards; }
.animate-fade-in-up { animation: fadeInUp 0.6s ease-out forwards; }
.animate-fade-in-down { animation: fadeInDown 0.6s ease-out forwards; }
.animate-slide-in-left { animation: slideInLeft 0.6s ease-out forwards; }
.animate-slide-in-right { animation: slideInRight 0.6s ease-out forwards; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-xl);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        z-index: var(--z-dropdown);
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    
    .btn {
        width: 100%;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .navbar,
    .footer,
    .btn,
    .mobile-menu-toggle {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}