/* =================================
   MODERN MONOCHROME BLACK/WHITE CSS
   ================================= */

:root {
    /* Light Mode - Clean White Base */
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-accent: #f5f5f5;
    --text-primary: #000000;
    --text-secondary: #333333;
    --text-muted: #666666;

    /* Monochrome Grays */
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;

    /* Pure Monochrome */
    --pure-black: #000000;
    --pure-white: #ffffff;

    /* Accent Colors - Monochrome only */
    --accent-primary: #000000;
    --accent-secondary: #333333;

    /* Border & Shadow */
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --shadow-medium: rgba(0, 0, 0, 0.12);
    --shadow-strong: rgba(0, 0, 0, 0.2);
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    /* Dark Mode - Deep Black Base */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-accent: #141414;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #a0a0a0;

    /* Monochrome Grays (inverted) */
    --gray-100: #1a1a1a;
    --gray-200: #242424;
    --gray-300: #2e2e2e;
    --gray-400: #383838;
    --gray-500: #525252;
    --gray-600: #6c6c6c;
    --gray-700: #8a8a8a;
    --gray-800: #b0b0b0;
    --gray-900: #d4d4d4;

    /* Accent Colors - Dark Mode */
    --accent-primary: #ffffff;
    --accent-secondary: #e0e0e0;

    /* Darker borders and shadows */
    --border-color: #2a2a2a;
    --shadow-color: rgba(255, 255, 255, 0.05);
    --shadow-medium: rgba(255, 255, 255, 0.08);
    --shadow-strong: rgba(255, 255, 255, 0.15);
    --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.8);
}

/* =================================
   GLOBAL STYLES
   ================================= */

* {
    transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    position: relative;
    line-height: 1.6;
    font-weight: 400;
    letter-spacing: -0.011em;
}

/* Modern subtle texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 1px,
            var(--shadow-color) 1px,
            var(--shadow-color) 2px
        );
    opacity: 0.02;
    pointer-events: none;
    z-index: 0;
}

/* Glassmorphism helper class */
.glass-effect {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .glass-effect {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* =================================
   TYPOGRAPHY - MODERN MINIMALIST
   ================================= */

h1, h2, h3, h4, h5, h6 {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.2;
    position: relative;
}

.viking-title {
    font-family: 'Inter', sans-serif;
    font-weight: 900;
    letter-spacing: -0.04em;
    text-shadow: none;
}

.viking-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--text-primary), transparent);
    margin: 15px 0;
}

.logo-text {
    font-family: 'Inter', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-shadow: none;
}

/* Logo styling - dark/light mode support */
.logo-img {
    transition: filter 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light mode: normale PNG (zwart logo) */
body:not([data-theme="dark"]) .logo-img {
    filter: none;
}

/* Dark mode: inverteer PNG naar wit */
[data-theme="dark"] .logo-img {
    filter: invert(1) brightness(1);
}

/* Hover effect voor logo */
.navbar-brand:hover .logo-img {
    transform: scale(1.05);
}

body:not([data-theme="dark"]) .navbar-brand:hover .logo-img {
    filter: drop-shadow(0 0 12px rgba(0, 0, 0, 0.2));
}

[data-theme="dark"] .navbar-brand:hover .logo-img {
    filter: invert(1) brightness(1) drop-shadow(0 0 12px rgba(255, 255, 255, 0.3));
}

.display-2, .display-3, .display-4 {
    text-shadow: none;
    font-weight: 800;
    letter-spacing: -0.03em;
}

/* =================================
   THEME & LANGUAGE TOGGLE BUTTONS
   ================================= */

#themeToggle,
#langToggle {
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1.3rem;
    padding: 0.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
}

#themeToggle:hover,
#langToggle:hover {
    background: var(--bg-accent);
    transform: scale(1.1);
}

#themeToggle:hover {
    transform: rotate(180deg) scale(1.1);
}

#langToggle:hover {
    transform: scale(1.1);
}

.theme-icon {
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =================================
   LANGUAGE CONTENT CONTROL
   ================================= */

[data-lang-content] {
    display: none !important;
}

body[data-lang="nl"] [data-lang-content="nl"] {
    display: block !important;
}

body[data-lang="en"] [data-lang-content="en"] {
    display: block !important;
}

/* Inline elements */
body[data-lang="nl"] span[data-lang-content="nl"],
body[data-lang="en"] span[data-lang-content="en"] {
    display: inline !important;
}

/* Flex containers */
body[data-lang="nl"] [data-lang-content="nl"].d-flex,
body[data-lang="en"] [data-lang-content="en"].d-flex {
    display: flex !important;
}

/* Grid containers */
body[data-lang="nl"] [data-lang-content="nl"].d-grid,
body[data-lang="en"] [data-lang-content="en"].d-grid {
    display: grid !important;
}

/* List items (for navigation) */
body[data-lang="nl"] li[data-lang-content="nl"],
body[data-lang="en"] li[data-lang-content="en"] {
    display: list-item !important;
}

/* =================================
   NAVBAR - MODERN MINIMALIST
   ================================= */

.viking-nav {
    background: var(--bg-secondary) !important;
    box-shadow: 0 1px 3px var(--shadow-color);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.viking-nav::before {
    display: none;
}

.navbar-brand img {
    filter: drop-shadow(0 1px 2px var(--shadow-color));
}

.nav-link {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    text-transform: none;
    letter-spacing: -0.01em;
    font-size: 0.95rem;
    color: var(--text-secondary) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 0.5rem 1rem !important;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--text-primary);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 70%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary) !important;
}

/* =================================
   HERO SECTION - MODERN MINIMAL
   ================================= */

.hero-section {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    min-height: 100vh;
    height: 100vh;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.hero-section::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--shadow-color) 0%, transparent 70%);
    top: -250px;
    right: -250px;
    opacity: 0.3;
}

.hero-section::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--shadow-color) 0%, transparent 70%);
    bottom: -200px;
    left: -200px;
    opacity: 0.2;
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.hero-logo {
    max-width: 120px;
    width: 100%;
    height: auto;
    filter: invert(1) brightness(1) drop-shadow(0 4px 8px rgba(255, 255, 255, 0.5));
    animation: fadeInDown 0.8s ease-out;
}

.hero-logo .logo-fill,
.hero-logo path {
    fill: #ffffff;
}

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

[data-theme="dark"] .hero-logo {
    filter: invert(1) brightness(1) drop-shadow(0 4px 12px rgba(255, 255, 255, 0.3));
}

[data-theme="dark"] .hero-logo .logo-fill,
[data-theme="dark"] .hero-logo path {
    fill: #ffffff;
}

/* =================================
   PAGE HEADER
   ================================= */

.page-header {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.page-header::before {
    display: none;
}

/* =================================
   BUTTONS - MODERN MONOCHROME
   ================================= */

.btn-primary {
    background: var(--text-primary);
    border: 2px solid var(--text-primary);
    color: var(--bg-primary) !important;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-transform: none;
    letter-spacing: -0.01em;
    padding: 12px 32px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px var(--shadow-color);
    position: relative;
    border-radius: 8px;
}

.btn-primary::before {
    display: none;
}

.btn-primary:hover {
    background: var(--text-secondary);
    border-color: var(--text-secondary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--shadow-medium);
}

.btn-outline-light {
    border: 2px solid var(--text-primary);
    color: var(--text-primary) !important;
    background: transparent;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-transform: none;
    letter-spacing: -0.01em;
    padding: 12px 32px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
}

.btn-outline-light:hover {
    background: var(--text-primary);
    color: var(--bg-primary) !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--shadow-medium);
}

.btn-dark {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    color: var(--text-primary) !important;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-transform: none;
    letter-spacing: -0.01em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
}

.btn-dark:hover {
    background: var(--bg-accent);
    border-color: var(--text-primary);
    transform: translateY(-2px);
}

.btn-light {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    color: var(--text-primary) !important;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-transform: none;
    letter-spacing: -0.01em;
    border-radius: 8px;
}

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

/* =================================
   CARDS - MODERN MINIMAL
   ================================= */

.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

.card::before {
    display: none;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px var(--shadow-medium);
    border-color: var(--text-primary);
}

.card-body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.card-body p,
.card-body li,
.card-body h3,
.card-body h4,
.card-body h5 {
    color: var(--text-primary);
}

.card-body .text-muted {
    color: var(--text-muted) !important;
}

.card-body .list-unstyled li {
    color: var(--text-primary);
}

/* =================================
   STATS CARDS - MODERN DESIGN
   ================================= */

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 2rem;
}

.stat-card::before {
    display: none;
}

.stat-card h3,
.stat-card p {
    color: var(--text-primary);
}

.stat-card .text-primary {
    color: var(--text-primary) !important;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-medium);
    border-color: var(--text-primary);
}

.stat-card h3 {
    font-size: 3.5rem;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-weight: 800;
    text-shadow: none;
    letter-spacing: -0.03em;
}

/* =================================
   ICON BOXES - MODERN MINIMAL
   ================================= */

.icon-box {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.icon-box i {
    color: var(--text-primary);
    filter: none;
}

.icon-box:hover i {
    transform: scale(1.1);
    color: var(--text-primary);
}

.icon-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-accent);
    border: 2px solid var(--border-color);
    box-shadow: var(--card-shadow);
}

/* =================================
   STEP NUMBERS - MODERN DESIGN
   ================================= */

.step-number {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: var(--text-primary);
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    border: 3px solid var(--bg-primary);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

/* =================================
   CTA SECTION - MODERN CONTRAST
   ================================= */

.cta-section {
    background: var(--text-primary);
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-section::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    top: -300px;
    right: -300px;
}

.cta-section::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
    bottom: -250px;
    left: -250px;
}

.cta-section .container {
    position: relative;
    z-index: 1;
}

.cta-section h2,
.cta-section p {
    color: var(--bg-primary) !important;
}

[data-theme="dark"] .cta-section {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .cta-section h2,
[data-theme="dark"] .cta-section p {
    color: var(--text-primary) !important;
}

/* =================================
   FOOTER - MODERN MINIMAL
   ================================= */

.viking-footer {
    background: var(--bg-secondary) !important;
    border-top: 1px solid var(--border-color);
    position: relative;
}

.viking-footer::before {
    display: none;
}

footer a {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

footer a:hover {
    color: var(--text-primary) !important;
    text-decoration: underline;
}

.social-links a {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
}

.social-links a:hover {
    transform: translateY(-3px);
    color: var(--text-primary) !important;
}

/* =================================
   FORMS - MODERN MINIMAL
   ================================= */

.form-control,
.form-select {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 12px 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: 'Inter', sans-serif;
}

.form-control:focus,
.form-select:focus {
    background-color: var(--bg-secondary);
    border-color: var(--text-primary);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px var(--shadow-color);
}

.form-label {
    color: var(--text-secondary);
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    text-transform: none;
    letter-spacing: -0.01em;
    font-size: 0.9rem;
}

/* =================================
   ALERTS
   ================================= */

.alert {
    border-radius: 12px;
    border: 1px solid;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.alert h4,
.alert h5,
.alert p {
    color: var(--text-primary);
}

.alert-success {
    border-color: var(--border-color);
    color: var(--text-primary);
    background-color: var(--bg-accent);
}

.alert-danger {
    border-color: var(--text-primary);
    color: var(--text-primary);
    background-color: var(--bg-accent);
}

.alert-warning {
    border-color: var(--border-color);
    background-color: var(--bg-accent);
    color: var(--text-primary);
}

.alert-info {
    border-color: var(--border-color);
    background-color: var(--bg-accent);
    color: var(--text-primary);
}

/* =================================
   BACKGROUND SECTIONS
   ================================= */

.bg-light {
    background-color: var(--bg-accent) !important;
}

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

/* =================================
   TEXT COLORS
   ================================= */

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

.text-muted {
    color: var(--text-muted) !important;
}

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

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

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

/* =================================
   RESPONSIVE DESIGN
   ================================= */

@media (max-width: 768px) {
    .hero-section {
        min-height: 500px;
    }

    .display-2 {
        font-size: 2.5rem;
    }

    .display-3 {
        font-size: 2rem;
    }

    .display-4 {
        font-size: 1.75rem;
    }

    .viking-title::after {
        width: 40px;
    }
}

/* =================================
   ANIMATIONS - MODERN & SMOOTH
   ================================= */

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in {
    animation: slideIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.scale-in {
    animation: scaleIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =================================
   CUSTOM SCROLLBAR - MINIMAL
   ================================= */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-left: 1px solid var(--border-color);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 5px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--gray-700);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-600);
}

/* =================================
   MODERN DECORATIVE ELEMENTS
   ================================= */

.viking-divider {
    height: 1px;
    background: var(--border-color);
    margin: 3rem 0;
}

/* Modern focus states */
*:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

/* Smooth page transitions */
.page-transition {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}