:root {
    color-scheme: light dark;
    
    /* Light mode color palette - high contrast SaaS look */
    --bg-page: #FFFFFF;
    --bg-hero: #FAFAFA;
    --bg-section: #FAFAFA;
    --bg-card: #FFFFFF;
    --text-main: #111827;
    --text-body: #333333;
    --text-muted: #4B5563;
    --border-soft: #E5E7EB;
    --primary: #2563EB;
    --primary-hover: #1D4ED8;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 2px 8px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 24px rgba(15, 23, 42, 0.12);
}

/* Dark mode overrides */
[data-bs-theme="dark"] {
    --bg-page: #0F172A;
    --bg-hero: #1E293B;
    --bg-section: #0F172A;
    --bg-card: #1E293B;
    --text-main: #F1F5F9;
    --text-body: #E2E8F0;
    --text-muted: #94A3B8;
    --border-soft: #334155;
    --primary: #3B82F6;
    --primary-hover: #60A5FA;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.45);
}

/* Apply color palette to body and main elements */
body {
    background-color: var(--bg-page);
    color: var(--text-body);
}

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

main {
    background-color: var(--bg-page);
}

.header-nav {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-soft);
    padding-block: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.header-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.header-nav .navbar-brand {
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: -0.01em;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.language-switcher {
    margin: 0;
    display: inline-flex;
}

.language-switcher select {
    min-width: 110px;
    border-radius: 999px;
    font-size: 0.85rem;
    padding-inline: 0.75rem;
    padding-block: 0.3rem;
    background-color: var(--bg-card);
    border-color: var(--border-soft);
    color: var(--text-main);
}

.btn-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-soft);
    color: var(--text-main);
    background-color: transparent;
    transition: background-color 0.2s ease, color 0.2s ease;
    padding: 0;
}

.btn-icon:hover,
.btn-icon:focus {
    background-color: var(--bg-page);
    color: var(--text-main);
    border-color: var(--border-soft);
}

.btn-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    border: 1px solid var(--border-soft);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    padding: 0;
}

.btn-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    background-color: var(--bg-page);
    color: var(--text-muted);
    text-transform: uppercase;
}

.nav-auth-actions {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-auth-actions .btn {
    min-width: 88px;
}

.nav-menu-toggle {
    display: none;
}

@media (max-width: 991.98px) {
    .header-nav .container {
        gap: 0.5rem;
    }

    .language-switcher select {
        min-width: 90px;
    }

    .header-nav .dropdown.d-lg-block {
        display: none !important;
    }

    .nav-menu-toggle {
        display: inline-flex !important;
    }
}

@media (max-width: 767.98px) {
    .language-switcher select {
        min-width: 78px;
        font-size: 0.8rem;
        padding-inline: 0.5rem;
    }
}

/* ========================================
   Landing page: Hero section
   ======================================== */
.hero-section {
    padding-top: 4rem;
    padding-bottom: 5rem;
    background: linear-gradient(180deg, var(--bg-page) 0%, var(--bg-hero) 100%);
}

.hero-section h1 {
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.hero-section .lead {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--text-body);
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.hero-cta-group .btn {
    padding: 0.75rem 2rem;
}

/* How it works card */
.how-it-works-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
    border-radius: 0.75rem;
}

.how-it-works-card .card-body {
    padding: 2rem;
}

.how-it-works-card h2 {
    color: var(--text-main);
}

.steps-list {
    counter-reset: step-counter;
    list-style: none;
    padding-left: 0;
}

.steps-list li {
    counter-increment: step-counter;
    position: relative;
    padding-left: 2.5rem;
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.steps-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 1.75rem;
    height: 1.75rem;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.steps-list li:last-child {
    margin-bottom: 0;
}

@media (min-width: 992px) {
    .hero-section {
        padding-top: 5rem;
        padding-bottom: 6rem;
    }
    
    .hero-section h1 {
        font-size: 3.5rem;
    }
}

/* ========================================
   Landing page: Pricing section
   ======================================== */
.pricing-section {
    padding-top: 6rem;
    padding-bottom: 5rem;
    scroll-margin-top: 80px;
    background-color: var(--bg-section);
}

.pricing-section h2 {
    color: var(--text-main);
}

.pricing-section .lead {
    color: var(--text-body);
}

.pricing-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border-radius: 0.75rem;
    overflow: hidden;
    background-color: var(--bg-card);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
}

.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.pricing-card .card-body {
    padding: 2rem;
    background-color: var(--bg-card);
}

.pricing-card .card-header {
    padding: 0.875rem 1.25rem;
    font-size: 0.9rem;
    letter-spacing: 0.025em;
    background-color: var(--primary);
    border-color: var(--primary);
}

.pricing-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    letter-spacing: -0.01em;
    color: var(--text-main);
}

.pricing-card .price-display {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-soft);
}

.pricing-card .price-display .h3 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.pricing-card .price-display .text-muted {
    font-size: 0.95rem;
    margin-left: 0.25rem;
    color: var(--text-muted);
}

.pricing-card ul {
    font-size: 0.95rem;
    line-height: 1.8;
    padding-left: 0;
    color: var(--text-muted);
}

.pricing-card ul li {
    margin-bottom: 0.75rem;
    padding-left: 0.25rem;
}

.pricing-card .btn {
    padding: 0.75rem 1.5rem;
    font-weight: 500;
}

@media (min-width: 992px) {
    .pricing-section {
        padding-top: 7rem;
        padding-bottom: 6rem;
    }
}

/* ========================================
   Landing page: FAQ section
   ======================================== */
.faq-section {
    padding-top: 5rem;
    padding-bottom: 6rem;
    background-color: var(--bg-page);
}

.faq-section h2 {
    margin-bottom: 3rem;
    letter-spacing: -0.01em;
    color: var(--text-main);
}

.accordion-item {
    margin-bottom: 1rem;
    border-radius: 0.5rem;
    overflow: hidden;
    border: 1px solid var(--border-soft);
    background-color: var(--bg-card);
    box-shadow: var(--shadow-md);
}

.accordion-item:last-child {
    margin-bottom: 0;
}

.accordion-button {
    font-weight: 500;
    padding: 1.25rem 1.5rem;
    font-size: 1.05rem;
    background-color: var(--bg-card);
    color: var(--text-main);
}

.accordion-button:not(.collapsed) {
    font-weight: 600;
    background-color: var(--bg-page);
    color: var(--text-main);
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--border-soft);
}

.accordion-body {
    padding: 1.25rem 1.5rem 1.5rem;
    line-height: 1.7;
    color: var(--text-muted);
    background-color: var(--bg-card);
}

@media (min-width: 992px) {
    .faq-section {
        padding-top: 6rem;
        padding-bottom: 7rem;
    }
}

/* Dashboard action buttons */
.action-btn-group {
    display: inline-flex;
    gap: 0.25rem;
    align-items: center;
}

.action-btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 0.375rem;
    border: 1px solid var(--border-soft);
    background-color: transparent;
    transition: background-color 0.15s ease, border-color 0.15s ease;
    text-decoration: none;
    font-size: 1.1rem;
}

.action-btn-icon:hover {
    background-color: var(--bg-page);
    border-color: var(--border-soft);
}

/* Analytics and QR page improvements */
.page-header {
    margin-bottom: 2rem;
}

.page-header .back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
    padding: 0;
    font-size: 0.95rem;
}

.stats-card {
    transition: transform 0.2s ease;
}

.stats-card:hover {
    transform: translateY(-2px);
}

.stats-card .card-body {
    padding: 1.5rem;
}

.stats-card h2 {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* QR code display */
.qr-display {
    padding: 3rem 2rem;
}

.qr-display img {
    border-radius: 0.5rem;
}

/* ========================================
   Responsive improvements
   ======================================== */
@media (max-width: 767.98px) {
    .hero-section {
        padding-top: 3rem;
        padding-bottom: 3.5rem;
    }
    
    .hero-section h1 {
        font-size: 2.25rem;
    }
    
    .hero-section .lead {
        font-size: 1.05rem;
    }
    
    .hero-cta-group {
        flex-direction: column;
    }
    
    .hero-cta-group .btn {
        width: 100%;
        justify-content: center;
    }
    
    .how-it-works-card .card-body {
        padding: 1.5rem;
    }
    
    .pricing-section {
        padding-top: 4rem;
        padding-bottom: 3.5rem;
    }
    
    .pricing-card .card-body {
        padding: 1.5rem;
    }
    
    .pricing-card .price-display .h3 {
        font-size: 2rem;
    }
    
    .faq-section {
        padding-top: 3.5rem;
        padding-bottom: 4rem;
    }
    
    .accordion-button {
        padding: 1rem;
        font-size: 1rem;
    }
    
    .accordion-body {
        padding: 1rem;
    }
    
    .action-btn-group {
        gap: 0.15rem;
    }
    
    .qr-display {
        padding: 2rem 1rem;
    }
}

@media (min-width: 768px) and (max-width: 991.98px) {
    .hero-section {
        padding-top: 3.5rem;
        padding-bottom: 4rem;
    }
    
    .pricing-section {
        padding-top: 5rem;
        padding-bottom: 4.5rem;
    }
    
    .faq-section {
        padding-top: 4.5rem;
        padding-bottom: 5rem;
    }
}

/* ========================================
   Additional UI elements
   ======================================== */
.card {
    background-color: var(--bg-card);
    border-color: var(--border-soft);
    box-shadow: var(--shadow-md);
    border-radius: 0.85rem;
}

.alert {
    border-color: var(--border-soft);
}

footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-soft);
    color: var(--text-muted);
}

/* Primary button styles */
.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: white;
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.btn-outline-secondary {
    color: var(--text-muted);
    border-color: var(--border-soft);
    background-color: transparent;
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus {
    background-color: var(--bg-page);
    border-color: var(--border-soft);
    color: var(--text-main);
}

/* Text color utilities */
.text-muted {
    color: var(--text-muted) !important;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-main);
}

/* Ensure dropdown menus use card background */
.dropdown-menu {
    background-color: var(--bg-card);
    border-color: var(--border-soft);
    box-shadow: var(--shadow-lg);
}

.dropdown-item {
    color: var(--text-main);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--bg-page);
    color: var(--text-main);
}

.dropdown-divider {
    border-color: var(--border-soft);
}

/* ========================================
   Auth pages (register/login)
   ======================================== */
.auth-page {
    background: linear-gradient(180deg, #FFFFFF 0%, #F9FAFB 100%);
}

.auth-container {
    max-width: 520px;
    margin: 0 auto;
}

.auth-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-lg);
    border-radius: 1rem;
    padding: 2.5rem;
}

.auth-card h1,
.auth-card label {
    color: var(--text-main);
}

.auth-card .form-text,
.auth-card p {
    color: var(--text-muted);
}

.auth-footer {
    color: var(--text-body);
}

@media (max-width: 575.98px) {
    .auth-card {
        padding: 1.75rem;
    }
}