/* ===================================
   CSS Variables - EASILY CUSTOMIZABLE
   =================================== */
:root {
    /* Modern Color Scheme */
    --primary-color: #FF6B9D;
    --primary-dark: #E63E7A;
    --primary-light: #FFB6D9;
    --secondary-color: #4A90E2;
    --accent-color: #FFD93D;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-warm: linear-gradient(135deg, #FF6B9D 0%, #FFA07A 100%);
    --gradient-cool: linear-gradient(135deg, #4A90E2 0%, #7B68EE 100%);
    --gradient-sunset: linear-gradient(135deg, #FF6B9D 0%, #FFD93D 100%);

    /* Neutral Colors */
    --dark-color: #2D3748;
    --gray-dark: #4A5568;
    --gray-medium: #718096;
    --gray-light: #E2E8F0;
    --white: #FFFFFF;
    --bg-light: #F7FAFC;

    /* Typography */
    --font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 900;

    /* 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;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   Global Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.7;
    color: var(--dark-color);
    overflow-x: hidden;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--dark-color);
}

img {
    max-width: 100%;
    height: auto;
}

/* ===================================
   Navigation - Modern Design
   =================================== */
.navbar {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
    padding: 0.75rem 0;
    box-shadow: var(--shadow-md);
}

.navbar-brand {
    font-weight: var(--font-weight-bold);
    color: var(--primary-color) !important;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: transform var(--transition-base);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-logo {
    transition: transform var(--transition-base);
}

.brand-text {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--font-weight-black);
    letter-spacing: -0.5px;
}

.navbar-toggler {
    border: none;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(255, 107, 157, 0.2);
}

.nav-link {
    color: var(--dark-color) !important;
    font-weight: var(--font-weight-medium);
    margin: 0 0.75rem;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color) !important;
    background: rgba(255, 107, 157, 0.1);
    transform: translateY(-1px);
}

.nav-link.active {
    color: var(--primary-color) !important;
    background: rgba(255, 107, 157, 0.15);
}

/* ===================================
   Hero Section - Redesigned
   =================================== */
.hero-section {
    background: var(--gradient-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 6rem 0 4rem;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 107, 157, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(74, 144, 226, 0.3) 0%, transparent 50%);
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(to top, var(--white) 0%, transparent 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    color: var(--white);
    font-weight: var(--font-weight-black);
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
    letter-spacing: -1px;
    line-height: 1.1;
}

.hero-content p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.25rem;
    margin-bottom: 2rem;
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-buttons .btn {
    padding: 1rem 2rem;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    border: none;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-buttons .btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.hero-buttons .btn:active {
    transform: translateY(-1px);
}

.app-stats {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.3);
    margin-top: 2rem;
}

.app-stats h3 {
    color: var(--white);
    font-weight: var(--font-weight-black);
    font-size: 2.5rem;
    margin-bottom: 0.25rem;
}

.app-stats p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
    margin: 0;
    font-weight: var(--font-weight-medium);
}

.hero-image {
    position: relative;
    z-index: 2;
}

.hero-image img {
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    transition: transform var(--transition-slow);
    border: 4px solid rgba(255, 255, 255, 0.2);
}

.hero-image img:hover {
    transform: scale(1.02) rotate(1deg);
}

/* ===================================
   Buttons - Modern Style
   =================================== */
.btn-primary {
    background: var(--gradient-warm);
    border: none;
    color: var(--white);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.1);
}

.btn-dark {
    background: var(--dark-color);
    border: none;
    color: var(--white);
}

.btn-dark:hover {
    background: var(--gray-dark);
}

.btn-outline-primary {
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    background: transparent;
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-base);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===================================
   Section Styles
   =================================== */
section {
    padding: 5rem 0;
}

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

/* ===================================
   Feature Cards - Modern Design
   =================================== */
.feature-card {
    background: var(--white);
    border: 1px solid var(--gray-light);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-warm);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    transition: all var(--transition-base);
    display: inline-block;
}

.feature-card:hover .feature-icon {
    transform: scale(1.15) rotate(5deg);
}

.feature-card h4 {
    color: var(--dark-color);
    font-weight: var(--font-weight-bold);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--gray-dark);
    line-height: 1.7;
}

/* ===================================
   Pricing Cards - Enhanced
   =================================== */
.pricing-card {
    background: var(--white);
    border: 2px solid var(--gray-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.pricing-card.premium {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(to bottom, rgba(255, 107, 157, 0.02) 0%, var(--white) 100%);
    transform: scale(1.05);
}

.pricing-card.premium:hover {
    transform: scale(1.05) translateY(-10px);
    box-shadow: var(--shadow-2xl);
}

.pricing-card .badge {
    font-weight: var(--font-weight-bold);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    letter-spacing: 0.5px;
}

.price {
    font-size: 3.5rem;
    font-weight: var(--font-weight-black);
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.price .currency {
    font-size: 2rem;
    vertical-align: super;
}

.price .period {
    font-size: 1.125rem;
    color: var(--gray-medium);
    font-weight: var(--font-weight-normal);
}

.pricing-card ul li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-light);
    font-size: 0.9375rem;
}

.pricing-card ul li:last-child {
    border-bottom: none;
}

/* ===================================
   Testimonials - Redesigned
   =================================== */
.testimonial-card {
    background: var(--white);
    border: 1px solid var(--gray-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 20px;
    font-size: 120px;
    color: rgba(255, 107, 157, 0.1);
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.stars i {
    color: var(--accent-color);
    margin-right: 0.125rem;
}

.testimonial-card p {
    position: relative;
    z-index: 1;
    font-style: italic;
    color: var(--gray-dark);
    line-height: 1.7;
}

.avatar i {
    color: var(--primary-light);
}

/* ===================================
   Social Links - Modern
   =================================== */
.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--gradient-warm);
    color: var(--white);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    text-decoration: none;
    box-shadow: var(--shadow-md);
}

.social-icon:hover {
    transform: translateY(-5px) rotate(5deg);
    box-shadow: var(--shadow-xl);
    color: var(--white);
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    text-decoration: none;
    color: rgba(255, 255, 255, 0.8) !important;
}

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

/* ===================================
   Footer - Enhanced
   =================================== */
footer {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 107, 157, 0.5), transparent);
}

footer h5 {
    color: var(--white);
    font-weight: var(--font-weight-bold);
    margin-bottom: 1.5rem;
}

footer a {
    color: var(--white) !important;
    transition: all var(--transition-fast);
    text-decoration: none;
    opacity: 0.9;
}

footer a:hover {
    color: var(--white) !important;
    opacity: 1;
    padding-left: 5px;
}

.footer-link {
    position: relative;
}

.footer-link:hover {
    color: var(--primary-light) !important;
}

footer p {
    color: rgba(255, 255, 255, 0.8) !important;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-brand span {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--font-weight-bold);
}

/* ===================================
   Responsive Design - MOBILE FIRST
   =================================== */

/* Hide brand text on small screens */
@media (max-width: 767.98px) {
    .brand-text {
        display: none !important;
    }

    .navbar-brand {
        justify-content: center;
    }

    .navbar-logo {
        height: 35px;
    }
}

/* Extra Small Devices (phones, 576px and down) */
@media (max-width: 575.98px) {
    html {
        font-size: 14px;
    }

    .navbar {
        padding: 0.75rem 0;
    }

    .hero-section {
        padding: 5rem 0 3rem;
        min-height: auto;
    }

    .hero-content {
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero-content p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
        padding: 0.875rem 1.5rem;
        font-size: 0.9375rem;
    }

    .app-stats {
        padding: 1.5rem;
        margin-top: 2rem;
    }

    .app-stats h3 {
        font-size: 1.75rem;
    }

    .app-stats p {
        font-size: 0.75rem;
    }

    .hero-image {
        margin-top: 2rem;
    }

    section {
        padding: 3rem 0;
    }

    .display-4 {
        font-size: 2rem;
    }

    .lead {
        font-size: 1rem;
    }

    .feature-card,
    .pricing-card,
    .testimonial-card {
        margin-bottom: 1.5rem;
    }

    .price {
        font-size: 2.5rem;
    }

    .social-icon {
        width: 50px;
        height: 50px;
        margin: 0.5rem 0.25rem;
    }

    .social-icon i {
        font-size: 1.25rem;
    }
}

/* Small Devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .price {
        font-size: 3rem;
    }

    .hero-buttons {
        flex-direction: row;
    }

    .hero-buttons .btn {
        flex: 1;
    }
}

/* Medium Devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .brand-text {
        display: inline !important;
    }

    .navbar-logo {
        height: 40px;
    }
}

@media (min-width: 768px) and (max-width: 991.98px) {
    .hero-content h1 {
        font-size: 3rem;
    }

    .pricing-card.premium {
        transform: scale(1);
    }

    .pricing-card.premium:hover {
        transform: scale(1.02) translateY(-8px);
    }
}

/* Large Devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .hero-content h1 {
        font-size: 3.75rem;
    }

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

    .nav-link {
        margin: 0 0.5rem;
    }
}

/* Extra Large Devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .hero-content h1 {
        font-size: 4rem;
    }

    .container {
        max-width: 1140px;
    }
}

/* ===================================
   Custom Scrollbar
   =================================== */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-warm);
    border-radius: var(--radius-full);
    border: 3px solid var(--bg-light);
}

::-webkit-scrollbar-thumb:hover {
    border-width: 2px;
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* ===================================
   Utility Classes
   =================================== */
.text-gradient {
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient {
    background: var(--gradient-primary);
}

/* ===================================
   Focus Styles for Accessibility
   =================================== */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

/* ===================================
   Print Styles
   =================================== */
@media print {
    .navbar,
    .hero-buttons,
    .social-links,
    footer {
        display: none;
    }

    .hero-section {
        background: var(--white);
        min-height: auto;
        padding: 2rem 0;
    }

    .hero-content h1,
    .hero-content p {
        color: var(--dark-color);
        text-shadow: none;
    }

    * {
        box-shadow: none !important;
    }
}

/* ===================================
   Performance Optimizations
   =================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}