:root {
    /* Joyful Theme - Light */
    --color-primary: #8B5CF6;
    /* Violet */
    --color-secondary: #EC4899;
    /* Pink */
    --color-accent: #F59E0B;
    /* Amber */
    --color-success: #10B981;
    --color-error: #EF4444;

    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --gradient-hover: linear-gradient(135deg, #7C3AED 0%, #DB2777 100%);
    --gradient-text: linear-gradient(to right, #8B5CF6, #EC4899);
    --gradient-bg: linear-gradient(120deg, #fdfbfb 0%, #ebedee 100%);

    --color-bg: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-surface-glass: rgba(255, 255, 255, 0.8);
    --color-text: #1F2937;
    --color-text-light: #6B7280;
    --color-border: #E5E7EB;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-color: 0 10px 25px -5px rgba(139, 92, 246, 0.3);
    /* Colored shadow */

    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
}

[data-theme="dark"] {
    /* Joyful Theme - Dark (Cyber/Neon) */
    --color-primary: #A78BFA;
    --color-secondary: #F472B6;
    --color-accent: #FBBF24;

    --gradient-primary: linear-gradient(135deg, #7C3AED 0%, #DB2777 100%);
    --gradient-hover: linear-gradient(135deg, #6D28D9 0%, #BE185D 100%);
    --gradient-text: linear-gradient(to right, #A78BFA, #F472B6);
    --gradient-bg: linear-gradient(to bottom right, #0F172A, #1E1B4B);

    --color-bg: #0F172A;
    --color-surface: #1E293B;
    --color-surface-glass: rgba(30, 41, 59, 0.8);
    --color-text: #F3F4F6;
    --color-text-light: #9CA3AF;
    --color-border: #374151;

    --shadow-color: 0 10px 25px -5px rgba(139, 92, 246, 0.5);
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background: var(--gradient-bg);
    /* Gradient background */
    background-attachment: fixed;
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    transition: color 0.3s, background 0.3s;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.2;
    font-weight: 700;
    color: var(--color-text);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-6);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--space-4);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-3);
}

p {
    margin-bottom: var(--space-4);
    color: var(--color-text-light);
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
}

ul {
    list-style: none;
}

/* Utility Classes */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.flex {
    display: flex;
}

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

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

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

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

.gap-2 {
    gap: var(--space-2);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-8 {
    gap: var(--space-8);
}

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

.w-full {
    width: 100%;
}

.hidden-mobile {
    display: block;
}

@media(max-width: 768px) {
    .hidden-mobile {
        display: none;
    }
}

/* Animations */
@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }

    100% {
        transform: translateY(0px);
    }
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 0 0 rgba(236, 72, 153, 0.4);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(236, 72, 153, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(236, 72, 153, 0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

.animate-slide-up {
    animation: slideUp 0.6s ease-out forwards;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 4px 15px rgba(236, 72, 153, 0.4);
}

.btn-primary:hover {
    background: var(--gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(236, 72, 153, 0.6);
}

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

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

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

.btn-outline:hover {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

/* Cards */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: all 0.4s ease;
    height: 100%;
    position: relative;
    z-index: 1;
}

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

/* Glass Effect for Special Cards */
.card-glass {
    background: var(--color-surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-4) var(--space-4);
}

.nav-links a {
    font-weight: 500;
    color: var(--color-text);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    background: rgba(139, 92, 246, 0.1);
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    padding: var(--space-16) 0;
    position: relative;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    margin-top: var(--space-12);
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: var(--space-4);
    background: var(--color-surface-glass);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(5px);
    border: 1px solid var(--color-border);
    min-width: 150px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
}

/* Plan Cards */
.plan-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    border: 2px solid var(--color-border);
    position: relative;
    transition: all 0.3s;
}

.plan-card:hover {
    transform: scale(1.02);
}

.plan-card.popular {
    border-color: var(--color-secondary);
    box-shadow: 0 0 30px rgba(236, 72, 153, 0.15);
    transform: scale(1.05);
    z-index: 2;
}

.plan-card.popular:hover {
    transform: scale(1.07);
}

.plan-price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-text);
    margin: var(--space-4) 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.plan-period {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-light);
}

.plan-features li {
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-border);
}

.plan-features li:last-child {
    border-bottom: none;
}

/* Table */
.comparison-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparison-table th,
.comparison-table td {
    padding: var(--space-4);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
    background: var(--color-bg);
    font-weight: 600;
}

.comparison-table .highlight {
    background: rgba(139, 92, 246, 0.05);
    color: var(--color-primary);
    font-weight: 600;
}

/* Mobile Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    background: none;
    border: none;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    margin: 2px 0;
    transition: 0.3s;
}

@media(max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--color-surface);
        flex-direction: column;
        padding: var(--space-4);
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: transform 0.3s ease-in-out;
        gap: var(--space-4);
        text-align: center;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    h1 {
        font-size: 2rem;
    }
}

/* Footer */
footer {
    background: var(--color-surface);
    padding: var(--space-16) 0 var(--space-8);
    margin-top: auto;
    border-top: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

.footer-col h4 {
    margin-bottom: var(--space-4);
    color: var(--color-primary);
    font-size: 1.25rem;
}

.footer-col ul li {
    margin-bottom: var(--space-2);
}

.footer-col ul li a {
    color: var(--color-text-light);
    transition: all 0.2s;
}

.footer-col ul li a:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

.social-links {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-4);
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    transition: all 0.3s;
}

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

/* Business Plans */
.business-toggle {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-8);
    gap: var(--space-4);
}

.plan-type-btn {
    padding: 0.75rem 2rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.plan-type-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.hidden-plan {
    display: none;
}