/* ========================================
   NORDIC INSIGHT ACADEMY - MASTER STYLESHEET
   Light, Professional, Modern Design (2026)
   ======================================== */

/* ========================================
   1. CSS RESET & BASE STYLES
   ======================================== */

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #2c3e50;
    background-color: #ffffff;
    overflow-x: hidden;
}

/* ========================================
   2. BRAND COLOR SYSTEM
   ======================================== */

:root {
    /* Primary Colors */
    --color-navy: #001f3f;
    --color-orange: #ff6b35;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-light-gray: #f8f9fa;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Text Colors */
    --color-text-primary: #2c3e50;
    --color-text-secondary: #64748b;
    --color-text-light: #94a3b8;
    
    /* Status Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Line Heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* ========================================
   3. TYPOGRAPHY
   ======================================== */

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

h1 {
    font-size: var(--font-size-5xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-4xl);
    letter-spacing: -0.015em;
}

h3 {
    font-size: var(--font-size-3xl);
}

h4 {
    font-size: var(--font-size-2xl);
}

h5 {
    font-size: var(--font-size-xl);
}

h6 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-relaxed);
}

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

a:hover {
    color: var(--color-orange);
}

a:focus {
    outline: 2px solid var(--color-orange);
    outline-offset: 2px;
}

strong {
    font-weight: 700;
}

em {
    font-style: italic;
}

/* ========================================
   4. LAYOUT COMPONENTS
   ======================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-3xl);
    align-items: start;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

/* ========================================
   5. HEADER & NAVIGATION
   ======================================== */

.header {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo img {
    height: 50px;
    width: auto;
    transition: transform var(--transition-base);
}

.logo img:hover {
    transform: scale(1.05);
}

.nav-primary {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--color-orange);
    background-color: rgba(255, 107, 53, 0.05);
}

.nav-link.active {
    color: var(--color-orange);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--color-orange);
    border-radius: 2px;
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    gap: 5px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background-color: var(--color-navy);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ========================================
   6. HERO SECTION
   ======================================== */

.hero {
    background: linear-gradient(135deg, #f8f9fa 0%, #f3f4f6 100%);
    padding: var(--spacing-3xl) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-navy);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: var(--line-height-relaxed);
}

.hero-ctas {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   7. MAIN CONTENT
   ======================================== */

.main-content {
    padding: var(--spacing-3xl) 0;
    min-height: 60vh;
}

.content-primary {
    flex: 1;
}

.content-section {
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-navy);
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background-color: var(--color-orange);
    border-radius: 2px;
}

.paragraph {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   8. SIDEBAR & BOXES
   ======================================== */

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.sidebar-box {
    background-color: var(--color-light-gray);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.sidebar-box:hover {
    border-color: var(--color-orange);
    box-shadow: var(--shadow-md);
}

.box-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.box-title::before {
    content: '';
    width: 4px;
    height: 24px;
    background-color: var(--color-orange);
    border-radius: 2px;
}

.box-list {
    list-style: none;
}

.box-link {
    display: block;
    padding: var(--spacing-sm) 0;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    padding-left: var(--spacing-md);
}

.box-link:hover {
    color: var(--color-orange);
    border-left-color: var(--color-orange);
    padding-left: var(--spacing-lg);
}

.box-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

.featured-box {
    background: linear-gradient(135deg, rgba(0, 31, 63, 0.05) 0%, rgba(255, 107, 53, 0.05) 100%);
    border: 2px solid var(--color-orange);
}

/* ========================================
   9. PARTNERS GRID
   ======================================== */

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

.partner-placeholder {
    background-color: var(--color-white);
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-base);
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-placeholder:hover {
    border-color: var(--color-orange);
    background-color: rgba(255, 107, 53, 0.02);
}

/* ========================================
   10. BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    gap: var(--spacing-sm);
}

.btn:focus {
    outline: 2px solid var(--color-orange);
    outline-offset: 2px;
}

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

.btn-primary:hover {
    background-color: #001a2e;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

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

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

.btn-small {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    background-color: var(--color-orange);
    color: var(--color-white);
}

.btn-small:hover {
    background-color: #e55a24;
    transform: translateY(-1px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ========================================
   11. FOOTER
   ======================================== */

.footer {
    background-color: var(--color-navy);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.footer-column {
    display: flex;
    flex-direction: column;
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-text {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   12. UTILITY CLASSES
   ======================================== */

/* Display Utilities */
.display-none {
    display: none;
}

.display-block {
    display: block;
}

.display-inline {
    display: inline;
}

.display-inline-block {
    display: inline-block;
}

.display-flex {
    display: flex;
}

.display-grid {
    display: grid;
}

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mt-3xl { margin-top: var(--spacing-3xl); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }
.mb-3xl { margin-bottom: var(--spacing-3xl); }

.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.p-2xl { padding: var(--spacing-2xl); }
.p-3xl { padding: var(--spacing-3xl); }

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

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

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

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

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

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

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

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

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

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

.font-bold {
    font-weight: 700;
}

.font-semibold {
    font-weight: 600;
}

.font-normal {
    font-weight: 400;
}

.font-light {
    font-weight: 300;
}

/* Background Utilities */
.bg-white {
    background-color: var(--color-white);
}

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

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

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

.bg-gray-100 {
    background-color: var(--color-gray-100);
}

/* Flex Utilities */
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}

.gap-xl {
    gap: var(--spacing-xl);
}

/* Border Utilities */
.border {
    border: 1px solid var(--color-gray-200);
}

.border-top {
    border-top: 1px solid var(--color-gray-200);
}

.border-bottom {
    border-bottom: 1px solid var(--color-gray-200);
}

.border-orange {
    border-color: var(--color-orange);
}

.rounded-sm {
    border-radius: var(--radius-sm);
}

.rounded-md {
    border-radius: var(--radius-md);
}

.rounded-lg {
    border-radius: var(--radius-lg);
}

.rounded-xl {
    border-radius: var(--radius-xl);
}

/* Shadow Utilities */
.shadow-sm {
    box-shadow: var(--shadow-sm);
}

.shadow-md {
    box-shadow: var(--shadow-md);
}

.shadow-lg {
    box-shadow: var(--shadow-lg);
}

.shadow-xl {
    box-shadow: var(--shadow-xl);
}

/* Opacity Utilities */
.opacity-50 {
    opacity: 0.5;
}

.opacity-75 {
    opacity: 0.75;
}

.opacity-100 {
    opacity: 1;
}

/* ========================================
   13. ANIMATIONS
   ======================================== */

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.animate-fadeInDown {
    animation: fadeInDown 0.6s ease-out;
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fadeInRight {
    animation: fadeInRight 0.6s ease-out;
}

.animate-slideInLeft {
    animation: slideInLeft 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ========================================
   14. RESPONSIVE DESIGN
   ======================================== */

/* Tablet (768px - 1199px) */
@media (max-width: 1199px) {
    .container {
        padding: 0 var(--spacing-lg);
    }

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

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    h1 {
        font-size: var(--font-size-4xl);
    }

    h2 {
        font-size: var(--font-size-3xl);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }
}

/* Mobile (480px - 767px) */
@media (max-width: 767px) {
    :root {
        --font-size-base: 15px;
    }

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

    .header-content {
        padding: var(--spacing-md) 0;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-white);
        border-bottom: 1px solid var(--color-gray-200);
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
        z-index: 999;
    }

    .nav-menu.active {
        max-height: 400px;
    }

    .nav-link {
        padding: var(--spacing-md) var(--spacing-lg);
        border-radius: var(--radius-md);
    }

    .nav-link.active::after {
        display: none;
    }

    .nav-link.active {
        background-color: rgba(255, 107, 53, 0.1);
    }

    .hero {
        padding: var(--spacing-2xl) 0;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .hero-ctas {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .btn {
        width: 100%;
    }

    .main-content {
        padding: var(--spacing-2xl) 0;
    }

    .content-grid {
        gap: var(--spacing-xl);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .sidebar {
        gap: var(--spacing-xl);
    }

    .sidebar-box {
        padding: var(--spacing-lg);
    }

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

    .footer {
        padding: var(--spacing-2xl) 0 var(--spacing-lg);
    }

    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    h3 {
        font-size: var(--font-size-xl);
    }
}

/* Small Mobile (< 480px) */
@media (max-width: 479px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 2.5rem;
    }

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

    .logo img {
        height: 40px;
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-sm);
    }

    .section-title {
        font-size: var(--font-size-xl);
    }

    .paragraph {
        font-size: var(--font-size-sm);
    }

    .sidebar-box {
        padding: var(--spacing-md);
    }

    .box-title {
        font-size: var(--font-size-base);
    }

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

    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }

    .footer-title {
        font-size: var(--font-size-base);
    }

    .footer-text {
        font-size: var(--font-size-xs);
    }
}

/* ========================================
   15. ACCESSIBILITY
   ======================================== */

/* Focus states for keyboard navigation */
button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--color-orange);
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: more) {
    body {
        color: var(--color-gray-900);
    }

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

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

/* ========================================
   16. PRINT STYLES
   ======================================== */

@media print {
    .header,
    .footer,
    .hamburger,
    .hero-ctas {
        display: none;
    }

    body {
        background-color: var(--color-white);
        color: var(--color-gray-900);
    }

    a {
        text-decoration: underline;
    }

    .container {
        max-width: 100%;
    }
}