:root {
    /* Color Palette - Light Mode */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --secondary: #ec4899;
    --bg-main: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.8);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: rgba(226, 232, 240, 0.8);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.3);
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --gradient-2: linear-gradient(135deg, #ec4899 0%, #ef4444 100%);
}

[data-theme="dark"] {
    /* Color Palette - Dark Mode */
    --primary: #818cf8;
    --primary-hover: #6366f1;
    --secondary: #f472b6;
    --bg-main: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border: rgba(51, 65, 85, 0.8);
    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s ease;
}

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
    font-family: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Glassmorphism utility */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

/* Section Spacing */
section {
    padding: 80px 0;
}

/* Headings */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Buttons */
.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    display: inline-block;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

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

/* Navbar */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: 0.3s ease;
}

nav.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a:hover {
    color: var(--primary);
}

.theme-toggle {
    font-size: 1.2rem;
    color: var(--text-main);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.nav-links.mobile-active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    right: 0;
    width: 70%;
    height: 100vh;
    background: var(--bg-main);
    padding: 100px 2rem;
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-main);
    border-radius: 5px;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-content {
    max-width: 700px;
    z-index: 1;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 1.2s ease-out;
}

.hero-bg-elements {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.blob {
    position: absolute;
    width: 500px;
    height: 500px;
    background: var(--primary);
    filter: blur(80px);
    opacity: 0.15;
    border-radius: 50%;
    animation: blobMove 20s infinite alternate;
}

@keyframes blobMove {
    from { transform: translate(0, 0); }
    to { transform: translate(100px, 100px); }
}

/* Tools Section */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.tool-card {
    padding: 2rem;
    border-radius: 24px;
    transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
}

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.tool-card h3 {
    margin-bottom: 1rem;
}

.tool-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Modal for Tools */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    padding: 1rem;
}

.modal-content {
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    border-radius: 24px;
    padding: 2.5rem;
    position: relative;
    overflow-y: auto;
}

.close-modal {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 1.5rem;
}

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

.faq-item {
    margin-bottom: 1rem;
    border-radius: 12px;
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    cursor: pointer;
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: 0.3s ease;
    color: var(--text-muted);
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.5rem;
    max-height: 200px;
}

/* Footer */
footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-col h4 {
    margin-bottom: 1.5rem;
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col ul li a {
    color: var(--text-muted);
}

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

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    z-index: 999;
}

/* Responsive */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .hero h1 {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .hero {
        text-align: center;
    }
    .hero-btns {
        justify-content: center;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}