/* Custom Variables */
:root {
    --primary-color: #E74C3C;
    --secondary-color: #2C3E50;
    --background-color: #F8F9FA;
    --accent-color: #F39C12;
    --success-color: #16A085;
    --text-color: #2C3E50;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --danger-color: #E74C3C;
    --warning-color: #F39C12;
    --info-color: #16A085;
    --shadow-color: rgba(44, 62, 80, 0.1);
    --hover-bg: rgba(231, 76, 60, 0.05);
    --animation-timing: cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --h1-font-size: clamp(2rem, 5vw, 3rem);
    --h2-font-size: clamp(1.5rem, 4vw, 2.5rem);
    --h3-font-size: clamp(1.25rem, 3vw, 2rem);
    --base-font-size: clamp(1rem, 2vw, 1.125rem);
    --small-font-size: clamp(0.875rem, 1.5vw, 1rem);
    --space-xs: clamp(0.5rem, 1vw, 0.75rem);
    --space-sm: clamp(0.75rem, 1.5vw, 1rem);
    --space-md: clamp(1rem, 2vw, 1.5rem);
    --space-lg: clamp(1.5rem, 3vw, 2rem);
    --space-xl: clamp(2rem, 4vw, 3rem);
    --container-max-width-desktop: 1440px;
    --container-max-width-laptop: 1200px;
    --container-max-width-tablet: 960px;
    --container-max-width-mobile: 540px;
}

/* General Styles - Performance Optimized */
html {
    font-size: 16px;
    scroll-behavior: smooth;
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
    /* Optimize font rendering */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    transition: all 0.3s var(--animation-timing);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    font-size: var(--base-font-size);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

main {
    flex: 1;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: all 0.3s var(--animation-timing);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.card:hover {
    box-shadow: 0 8px 16px var(--shadow-color);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.card-body {
    padding: var(--space-xl);
}

/* Form Styles */
.form-control, .form-select {
    border: 2px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-color);
    border-radius: 12px;
    padding: var(--space-sm) var(--space-md);
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(231, 76, 60, 0.15);
}

/* Button Styles */
.btn {
    padding: var(--space-sm) var(--space-md);
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s var(--animation-timing);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s var(--animation-timing);
}

.btn-primary:hover::before {
    opacity: 1;
}

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

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

.btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

/* Navigation Styles */
.navbar {
    padding: var(--space-sm) 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background-color: var(--secondary-color) !important;
    box-shadow: 0 2px 20px var(--shadow-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s var(--animation-timing);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    background-color: var(--card-bg) !important;
}

.navbar-brand {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--background-color) !important;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
    padding: 0.5rem 0;
}

.navbar-brand i {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.navbar-brand:hover i {
    transform: rotate(-10deg);
}

.navbar-brand::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
    border-radius: 3px;
}

.navbar-brand:hover::after {
    width: 100%;
}

.nav-link {
    font-weight: 500;
    color: var(--background-color) !important;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--accent-color) !important;
    background-color: var(--hover-bg);
    transform: translateY(-2px);
}

.nav-link.active {
    color: var(--primary-color) !important;
    background-color: var(--hover-bg);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
}

/* Alert Styles */
.alert {
    border-radius: 12px;
    border: none;
    padding: 1rem 1.25rem;
}

.alert-info {
    background-color: rgba(0, 180, 216, 0.1);
    color: var(--info-color);
}

.alert-warning {
    background-color: rgba(243, 156, 18, 0.1);
    color: var(--warning-color);
}

.alert-danger {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--danger-color);
}

.alert-success {
    background-color: rgba(22, 160, 133, 0.1);
    color: var(--success-color);
}

/* Toast Message */
.toast-message {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--card-bg);
    color: var(--text-color);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow-color);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid var(--border-color);
    animation: slideIn 0.3s var(--animation-timing), fadeOut 0.3s var(--animation-timing) 2.7s;
}

/* Password Form */
.password-form {
    position: relative;
}

.password-form .input-group {
    box-shadow: 0 2px 4px var(--shadow-color);
    border-radius: 12px;
    overflow: hidden;
}

.password-form .form-control {
    border-right: none;
    padding-right: 3rem;
}

.password-form .btn {
    border-left: none;
    background: transparent;
    color: var(--text-color);
    opacity: 0.7;
    padding: 0.75rem;
    width: 48px;
}

.password-form .btn:hover {
    opacity: 1;
    color: var(--primary-color);
}

/* Note Content */
.note-content {
    background-color: var(--background-color);
    border-radius: 12px;
    padding: 1.5rem !important;
    font-family: 'Fira Code', monospace;
    line-height: 1.6;
}

/* Copy Button */
.copy-button {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    transition: all 0.3s var(--animation-timing);
    opacity: 0.7;
}

.copy-button:hover {
    opacity: 1;
    transform: scale(1.1);
    background-color: var(--primary-color);
    color: white;
}

/* Loading Spinner */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Footer Styles */
footer {
    border-top: 1px solid #eee;
}

footer a {
    font-size: 14px;
    transition: color 0.2s ease;
}

footer a:hover {
    color: #000 !important;
}

footer small {
    font-size: 12px;
    color: #6c757d;
}

footer .fab {
    font-size: 18px;
    transition: transform 0.3s ease;
}

footer a:hover .fab {
    transform: translateY(-3px);
}

@media (max-width: 768px) {
    footer .d-flex {
        flex-wrap: wrap;
        gap: 1rem !important;
        justify-content: center;
    }
    
    footer a {
        font-size: 13px;
    }

    footer .fab {
        font-size: 16px;
    }
}

/* Animations */
@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Template Buttons */
.template-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.template-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    border-radius: 12px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    transition: all 0.3s var(--animation-timing);
    font-weight: 500;
}

.template-button:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    background-color: var(--hover-bg);
}

/* Password Strength */
.password-strength .progress-bar {
    transition: width 0.3s var(--animation-timing);
}

/* QR Code */
#noteQR {
    border: 1px solid var(--border-color);
    padding: 1rem;
    background-color: white;
    border-radius: 12px;
    transition: transform 0.3s var(--animation-timing);
    box-shadow: 0 2px 4px var(--shadow-color);
}

/* Brand Styles */
.brand-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

/* Enhanced Typography */
h1, .h1 { font-size: var(--h1-font-size); }
h2, .h2 { font-size: var(--h2-font-size); }
h3, .h3 { font-size: var(--h3-font-size); }

.brand-title {
    font-size: var(--h1-font-size);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

/* Enhanced Responsive Styles */
@media (max-width: 1200px) {
    .container {
        max-width: 95%;
    }
}

/* Enhanced Mobile Menu Styles */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background-color: var(--secondary-color);
        padding: 1rem;
        border-radius: 12px;
        margin-top: 1rem;
        box-shadow: 0 4px 12px var(--shadow-color);
    }

    .nav-link {
        color: var(--background-color) !important;
        padding: 0.75rem 1rem !important;
        margin: 0.25rem 0;
        border-radius: 8px;
        transition: all 0.3s ease;
    }

    .nav-link:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: var(--accent-color) !important;
        transform: translateX(5px);
    }

    .nav-link.active {
        background-color: rgba(255, 255, 255, 0.15);
        color: var(--accent-color) !important;
        font-weight: 600;
    }

    .navbar-toggler {
        border-color: rgba(255, 255, 255, 0.5);
        padding: 0.5rem;
    }

    .navbar-toggler:focus {
        box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.25);
    }

    .navbar-toggler-icon {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
}

@media (max-width: 767.98px) {
    .row > [class*="col-"] {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .card {
        margin-bottom: 1rem;
    }

    .btn-group {
        flex-direction: column;
        gap: 0.5rem;
    }

    .btn-group .btn {
        width: 100%;
    }

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

    .toast-message {
        left: 20px;
        right: 20px;
        bottom: 20px;
        text-align: center;
    }
}

@media (max-width: 575.98px) {
    .card-body {
        padding: 1.25rem;
    }

    .form-floating {
        margin-bottom: 0.75rem;
    }

    .btn {
        padding: 0.625rem 1.25rem;
    }

    .navbar-brand {
        font-size: 1.5rem;
    }

    .hero-section {
        padding: 3rem 0;
    }
}

/* Touch Device Optimizations */
@media (hover: none) {
    .btn:hover, .card:hover, .nav-link:hover {
        transform: none !important;
    }

    .btn:active, .card:active, .nav-link:active {
        transform: scale(0.98) !important;
    }
}

/* High DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .card {
        box-shadow: 0 2px 4px var(--shadow-color);
    }

    .text-rendering {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Print Styles */
@media print {
    body {
        background: none !important;
        color: #000 !important;
    }

    .navbar, .footer, .no-print {
        display: none !important;
    }

    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }

    .note-content {
        break-inside: avoid;
    }

    a[href]:after {
        content: " (" attr(href) ")";
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.visually-hidden:not(:focus):not(:active) {
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    height: 1px;
    overflow: hidden;
    position: absolute;
    white-space: nowrap;
    width: 1px;
}

/* Enhanced Focus Styles */
:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Hero Section */
.hero-section {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-xl) 0;
    margin-bottom: var(--space-lg);
    border-radius: 0 0 2rem 2rem;
}

/* Feature Icons */
.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    color: var(--primary-color);
    transition: transform 0.3s var(--animation-timing);
}

.card:hover .feature-icon {
    transform: scale(1.2);
}

/* Security Features */
.security-feature {
    padding: var(--space-md);
    border-radius: 12px;
    transition: all 0.3s var(--animation-timing);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    background-color: var(--card-bg);
}

.security-feature:hover {
    transform: translateX(10px);
    background-color: var(--hover-bg);
    border-color: var(--primary-color);
}

.security-icon {
    font-size: 1.5rem;
    margin-right: var(--space-md);
    color: var(--primary-color);
}

/* Use Cases */
.use-case-item {
    padding: var(--space-md);
    border-radius: 12px;
    transition: all 0.3s var(--animation-timing);
    background-color: var(--card-bg);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    border: 1px solid var(--border-color);
}

.use-case-item i {
    color: #E74C3C;
    margin-right: var(--space-md);
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(231, 76, 60, 0.1);
    border-radius: 50%;
}

.use-case-item h5 {
    color: var(--secondary-color);
    margin-bottom: 0.25rem;
    font-weight: 600;
}

.use-case-item p {
    color: var(--text-color);
    margin-bottom: 0;
    opacity: 0.8;
}

/* Enhanced Button Styles */
.btn-primary {
    background: var(--gradient-primary);
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s var(--animation-timing);
}

.btn-primary:hover::before {
    opacity: 1;
}

/* Card Enhancements */
.card {
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: all 0.3s var(--animation-timing);
}

.card:hover {
    box-shadow: 0 8px 16px var(--shadow-color);
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

/* Desktop (1440px and up) */
@media (min-width: 1440px) {
    .container {
        max-width: var(--container-max-width-desktop);
    }

    .hero-section {
        padding: var(--space-xl) 0;
    }

    .card-body {
        padding: var(--space-xl);
    }
}

/* Laptop (1200px to 1439px) */
@media (min-width: 1200px) and (max-width: 1439px) {
    .container {
        max-width: var(--container-max-width-laptop);
    }

    .card-body {
        padding: var(--space-lg);
    }
}

/* Tablet (768px to 1199px) */
@media (min-width: 768px) and (max-width: 1199px) {
    .container {
        max-width: var(--container-max-width-tablet);
    }

    .navbar-brand {
        font-size: 1.5rem;
    }

    .card-body {
        padding: var(--space-md);
    }

    .hero-section {
        padding: var(--space-lg) 0;
    }

    .row {
        margin-left: calc(-1 * var(--space-sm));
        margin-right: calc(-1 * var(--space-sm));
    }

    .col, [class*="col-"] {
        padding-left: var(--space-sm);
        padding-right: var(--space-sm);
    }
}

/* Mobile (up to 767px) */
@media (max-width: 767px) {
    .container {
        max-width: var(--container-max-width-mobile);
        padding-left: var(--space-sm);
        padding-right: var(--space-sm);
    }

    .navbar {
        padding: var(--space-sm) 0;
    }

    .navbar-brand {
        font-size: 1.25rem;
    }

    .card-body {
        padding: var(--space-sm);
    }

    .hero-section {
        padding: var(--space-lg) var(--space-sm);
        border-radius: 0 0 1rem 1rem;
    }
    
    .hero-section .display-4 {
        font-size: var(--h1-font-size);
        margin-bottom: var(--space-sm);
    }
    
    .hero-section .lead {
        font-size: var(--base-font-size);
    }

    .feature-icon {
        font-size: 2rem;
        margin-bottom: var(--space-sm);
    }

    .step-number {
        width: 32px;
        height: 32px;
        min-width: 32px;
        font-size: 0.9rem;
    }

    .security-feature {
        padding: var(--space-sm);
        margin-bottom: var(--space-sm);
        flex-direction: row;
        align-items: center;
    }

    .security-feature:hover {
        transform: translateX(5px);
    }

    .security-icon {
        font-size: 1.25rem;
        margin-right: var(--space-sm);
    }

    .security-feature h5 {
        font-size: 1rem;
        margin-bottom: 0.25rem;
    }

    .security-feature p {
        font-size: var(--small-font-size);
        margin-bottom: 0;
    }

    .use-case-item {
        padding: var(--space-sm);
        margin-bottom: var(--space-xs);
    }

    .use-case-item i {
        font-size: 1.25rem;
    }

    .use-case-item h5 {
        font-size: 1rem;
        margin-bottom: 0.25rem;
    }

    .use-case-item p {
        font-size: var(--small-font-size);
        margin-bottom: 0;
    }

    .card {
        margin-bottom: var(--space-md);
    }

    .card-body {
        padding: var(--space-md);
    }

    .card-title {
        font-size: 1.25rem;
        margin-bottom: var(--space-sm);
    }

    .row > [class*="col-"] {
        margin-bottom: var(--space-sm);
    }

    .lead {
        font-size: var(--base-font-size);
        line-height: 1.5;
    }

    .mb-4, .my-4 {
        margin-bottom: var(--space-md) !important;
    }

    .mt-4, .my-4 {
        margin-top: var(--space-md) !important;
    }

    .p-5 {
        padding: var(--space-md) !important;
    }
}

/* Tablet Adjustments */
@media (min-width: 768px) and (max-width: 991px) {
    .security-feature {
        padding: var(--space-md);
    }

    .use-case-item {
        padding: var(--space-md);
    }

    .card-body {
        padding: var(--space-lg);
    }

    .hero-section {
        padding: var(--space-xl) 0;
    }
}

/* Touch Device Optimizations */
@media (hover: none) {
    .btn:hover, .card:hover, .nav-link:hover {
        transform: none !important;
    }

    .btn:active, .card:active, .nav-link:active {
        transform: scale(0.98) !important;
    }
}

/* High DPI Screen Optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .card {
        box-shadow: 0 2px 4px var(--shadow-color);
    }

    .text-rendering {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.visually-hidden:not(:focus):not(:active) {
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    height: 1px;
    overflow: hidden;
    position: absolute;
    white-space: nowrap;
    width: 1px;
}

/* Enhanced Focus Styles */
:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Hero Section */
.hero-section {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-xl) 0;
    margin-bottom: var(--space-lg);
    border-radius: 0 0 2rem 2rem;
}

/* Security Feature Hover */
.security-feature:hover {
    background-color: var(--hover-bg);
    border-color: var(--primary-color);
}

/* Social Icons */
.social-icon:hover {
    background-color: var(--primary-color);
    color: var(--background-color);
}

/* Remove dark mode toggle button styles */
#darkModeToggle {
    display: none;
}

/* How It Works Section Styles */
.how-it-works {
    padding: var(--space-lg) 0;
    position: relative;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    position: relative;
    padding: var(--space-md);
    background-color: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s var(--animation-timing);
}

.step-item:hover {
    transform: translateX(10px);
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px var(--shadow-color);
}
.step-number {
    background-color: var(--primary-color);
    color: white;
    width: 60px;
    height: 60px;
    min-width: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.5rem;
    box-shadow: 0 4px 8px rgba(231, 76, 60, 0.2);
    transition: all 0.3s ease;
}

.step-number i {
    font-size: 1.5rem;
}

.step-content {
    flex: 1;
}

.step-content h5 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: var(--h3-font-size);
    font-weight: 600;
}

.step-content p {
    color: var(--text-color);
    margin-bottom: 0;
    font-size: var(--base-font-size);
    opacity: 0.8;
}

/* Step Line Connector */
.step-item:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 80px;
    left: 30px;
    width: 2px;
    height: calc(100% + var(--space-md));
    background: linear-gradient(to bottom, var(--primary-color) 60%, transparent);
    z-index: -1;
}

/* Mobile Responsive Styles */
@media (max-width: 767px) {
    .how-it-works {
        padding: var(--space-md) var(--space-sm);
    }

    .step-item {
        gap: var(--space-sm);
        margin-bottom: var(--space-md);
        padding: var(--space-md);
    }

    .step-number {
        width: 48px;
        height: 48px;
        min-width: 48px;
        border-radius: 12px;
    }

    .step-number i {
        font-size: 1.25rem;
    }

    .step-content h5 {
        font-size: 1.1rem;
        margin-bottom: 0.25rem;
    }

    .step-content p {
        font-size: var(--small-font-size);
        opacity: 0.9;
    }

    .step-item:not(:last-child)::after {
        left: 24px;
        top: 60px;
    }
}

/* Tablet Responsive Styles */
@media (min-width: 768px) and (max-width: 991px) {
    .how-it-works {
        padding: var(--space-lg) var(--space-md);
    }

    .step-item {
        margin-bottom: var(--space-lg);
    }

    .step-content h5 {
        font-size: 1.25rem;
    }
}

/* FAQ Styles */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-list-item {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s var(--animation-timing);
}

.faq-list-item:first-child {
    border-top: 1px solid var(--border-color);
}

.faq-list-item h5 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-list-item h5::after {
    content: '\f107';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    transition: transform 0.3s ease;
    color: var(--text-color);
    opacity: 0.5;
}

.faq-list-item:hover h5::after {
    transform: translateY(2px);
    opacity: 1;
    color: var(--primary-color);
}

.faq-list-item p {
    color: var(--text-color);
    margin-bottom: 0;
    opacity: 0.8;
    font-size: 0.95rem;
    line-height: 1.6;
}

.faq-list-item:hover {
    background-color: var(--hover-bg);
    padding-left: 1rem;
    padding-right: 1rem;
    margin-left: -1rem;
    margin-right: -1rem;
    border-radius: 8px;
}

@media (max-width: 768px) {
    .faq-list-item {
        padding: 1.25rem 0;
    }

    .faq-list-item h5 {
        font-size: 1rem;
    }

    .faq-list-item p {
        font-size: 0.9rem;
    }
}

/* Feature Box Styles */
.feature-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    height: 100%;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    transition: all 0.3s var(--animation-timing);
}

.feature-box:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.feature-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background-color: var(--hover-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: all 0.3s var(--animation-timing);
}

.feature-box:hover .feature-icon {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.feature-content {
    flex: 1;
}

.feature-content h5 {
    color: var(--text-color);
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.feature-content p {
    color: var(--text-color);
    margin-bottom: 0;
    opacity: 0.8;
    font-size: 0.95rem;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .feature-box {
        padding: 1.5rem;
        gap: 1rem;
    }

    .feature-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
        font-size: 1.25rem;
    }

    .feature-content h5 {
        font-size: 1rem;
    }

    .feature-content p {
        font-size: 0.9rem;
    }
}

/* Use Case Box Styles */
.use-case-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: all 0.3s var(--animation-timing);
}

.use-case-box:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.use-case-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background-color: rgba(231, 76, 60, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #E74C3C;
    font-size: 1.5rem;
    transition: all 0.3s var(--animation-timing);
}

.use-case-box:hover .use-case-icon {
    background-color: #E74C3C;
    color: white;
    transform: scale(1.1);
}

.use-case-content {
    flex: 1;
}

.use-case-content h5 {
    color: var(--text-color);
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.use-case-content p {
    color: var(--text-color);
    margin-bottom: 0;
    opacity: 0.8;
    font-size: 0.95rem;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .use-case-box {
        padding: 1.5rem;
        gap: 1rem;
    }

    .use-case-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
        font-size: 1.25rem;
    }

    .use-case-content h5 {
        font-size: 1rem;
    }

    .use-case-content p {
        font-size: 0.9rem;
    }
}

/* About Page Styles */
.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.card:hover .feature-icon {
    transform: scale(1.2);
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 1rem;
}

.security-feature {
    padding: 1rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.security-feature:hover {
    transform: translateX(10px);
    background-color: var(--hover-bg);
}

.security-icon {
    font-size: 1.5rem;
    margin-right: 1rem;
    color: var(--primary-color);
}

.use-case-item {
    padding: 1rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    background-color: var(--card-bg);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.use-case-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    margin-bottom: 3rem;
    border-radius: 0 0 2rem 2rem;
}

/* Contact Page Styles */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    margin-bottom: 3rem;
    border-radius: 0 0 2rem 2rem;
}

.contact-icon {
    font-size: 2rem;
    width: 64px;
    height: 64px;
    background-color: var(--hover-bg);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.contact-card:hover .contact-icon {
    transform: scale(1.1);
    background-color: var(--primary-color);
    color: white;
}

.form-floating {
    margin-bottom: 1rem;
}

.form-floating > label {
    color: var(--text-color);
}

.contact-form {
    position: relative;
    z-index: 1;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: -10px;
    right: -10px;
    bottom: -10px;
    left: -10px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 20px;
    z-index: -1;
    opacity: 0.1;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--hover-bg);
    color: var(--primary-color);
    margin: 0 0.5rem;
    transition: all 0.3s ease;
}

.social-icon:hover {
    transform: translateY(-3px);
    background-color: var(--primary-color);
    color: white;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: -10px;
    right: -10px;
    bottom: -10px;
    left: -10px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 20px;
    z-index: -1;
    opacity: 0.1;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--hover-bg);
    color: var(--primary-color);
    margin: 0 0.5rem;
    transition: all 0.3s ease;
}

.social-icon:hover {
    transform: translateY(-3px);
    background-color: var(--primary-color);
    color: white;
}/* CTA Section Styles */
.cta-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: none;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.05) 0%, rgba(44, 62, 80, 0.05) 100%);
    z-index: 0;
}

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

.cta-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.2rem;
    color: var(--text-color);
    max-width: 600px;
    margin: 0 auto;
}

.cta-features {
    max-width: 800px;
    margin: 0 auto;
}

.cta-feature {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.cta-feature:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.cta-feature i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 0.75rem;
}

.cta-feature span {
    font-weight: 600;
    color: var(--secondary-color);
}

.cta-button {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border: none;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-subtitle {
        font-size: 1rem;
    }
    
    .cta-feature {
        flex-direction: column;
        text-align: center;
        padding: 0.75rem;
    }
    
    .cta-feature i {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
    
    .cta-button {
        padding: 0.875rem 2rem;
        font-size: 1rem;
    }
}

/* Image Wrapper Styles for PrivNotepad Section */
.image-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transition: all 0.3s var(--animation-timing);
    background-color: #f8f9fa;
    padding: 8px;
}

.image-wrapper:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    display: block;
    transition: transform 0.3s var(--animation-timing);
}

.image-wrapper:hover img {
    transform: scale(1.02);
}

/* Ensure equal height for images on desktop */
@media (min-width: 768px) {
    .image-wrapper {
        height: 400px;
    }
    
    .image-wrapper img {
        height: 100%;
        object-fit: cover;
    }
}

/* Mobile responsive */
@media (max-width: 767px) {
    .image-wrapper {
        height: 300px;
        margin-bottom: 1.5rem;
    }
    
    .image-wrapper img {
        height: 100%;
        object-fit: cover;
    }
}