/* Reset & Base Styles */
:root {
    --bg-body: #f8f9fa;
    --bg-surface: #ffffff;
    --bg-alt: #f8f9ff;
    --text-main: #333333;
    --text-secondary: #444444;
    --text-muted: #666666;
    --text-heading: #1a1a1a;
    --primary: #2a5bd7;
    --primary-hover: #1e4ac5;
    --border: #eeeeee;
    --shadow: rgba(0, 0, 0, 0.1);
    --hero-gradient-1: #f5f7ff;
    --hero-gradient-2: #eef1ff;
    --footer-bg: #1a1a1a;
    --footer-text: #aaaaaa;
}

[data-theme="dark"] {
    --bg-body: #121212;
    --bg-surface: #1e1e1e;
    --bg-alt: #252525;
    --text-main: #e0e0e0;
    --text-secondary: #cccccc;
    --text-muted: #aaaaaa;
    --text-heading: #ffffff;
    --primary: #5c9aff;
    --primary-hover: #7ab0ff;
    --border: #333333;
    --shadow: rgba(0, 0, 0, 0.5);
    --hero-gradient-1: #1a1a1a;
    --hero-gradient-2: #121212;
    --footer-bg: #0f0f0f;
    --footer-text: #cccccc;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
.header {
    background-color: var(--bg-surface);
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo-group {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    margin-bottom: 2px;
}

.tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn {
    padding: 10px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: all 0.3s;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-login {
    color: var(--primary);
    background-color: transparent;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background-color: rgba(42, 91, 215, 0.05);
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, var(--hero-gradient-1) 0%, var(--hero-gradient-2) 100%);
    overflow: hidden;
}

.hero-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 60px;
    text-align: left;
}

.hero-content {
    flex: 1;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.side-image {
    max-width: 110%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    transform: perspective(1000px) rotateY(-15deg) rotateX(5deg);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.side-image:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.05);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 25px;
    color: var(--text-heading);
}

.highlight {
    color: var(--primary);
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 0 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: var(--bg-surface);
    padding: 30px 25px;
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--shadow);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 10px;
    color: var(--text-heading);
}

/* Description Section */
.description {
    padding: 100px 0;
    background-color: var(--bg-surface);
}

.description-main {
    display: flex;
    align-items: center;
    gap: 60px;
}

.description-image {
    flex: 1;
    display: flex;
    justify-content: flex-start;
}

.description-content {
    flex: 1.2;
    text-align: left;
}

.side-image-alt {
    max-width: 110%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    transform: perspective(1000px) rotateY(15deg) rotateX(5deg);
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.side-image-alt:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.05);
}

.description-text {
    font-size: 1.6rem;
    color: var(--text-main);
    margin-bottom: 40px;
    line-height: 1.6;
    font-weight: 600;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--bg-alt);
    padding: 18px 25px;
    border-radius: 12px;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.feature-item:hover {
    background: var(--bg-surface);
    box-shadow: 0 5px 15px var(--shadow);
    border-color: var(--primary);
    transform: translateX(10px);
}

.feature-item i {
    color: var(--primary);
    font-size: 1.2rem;
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
    background-color: var(--bg-alt);
    text-align: center;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 60px;
    color: var(--text-heading);
}

.price-highlight {
    color: var(--primary);
    font-size: 3.5rem;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.pricing-card {
    background: var(--bg-surface);
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 10px 25px var(--shadow);
    position: relative;
    transition: all 0.3s;
}

.pricing-card:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    transform: translateY(-5px);
}

.pricing-card.popular {
    border-top: 5px solid var(--primary);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--text-heading);
}

.price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-heading);
    margin-bottom: 5px;
}

.price span {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: normal;
}

.billing {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 25px;
}

.price-features {
    list-style: none;
    text-align: left;
    margin-bottom: 30px;
    padding-left: 10px;
}

.price-features li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.pricing-note {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
}

.pricing-note a {
    color: var(--primary);
}

/* Why Section */
.why {
    padding: 100px 0;
    background-color: var(--bg-surface);
}

.why-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    text-align: left;
}

.why-content {
    flex: 1.2;
}

.why-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.why-text {
    font-size: 1.3rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Footer */
.footer {
    padding: 40px 0;
    background-color: var(--footer-bg);
    color: var(--footer-text);
    text-align: center;
}

.footer p {
    margin-bottom: 15px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.footer a {
    color: var(--primary);
}

/* Theme Toggle Button */
.btn-theme {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: color 0.3s;
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-theme:hover {
    color: var(--primary);
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.8rem;
    }

    .section-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        right: -100%;
        flex-direction: column;
        background-color: var(--bg-surface);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 30px 0;
        gap: 20px;
    }

    .nav-menu.active {
        right: 0;
    }

    .hamburger {
        display: block;
    }

    .hero-main {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .hero-subtitle {
        margin: 0 auto 30px;
    }

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

    .side-image {
        max-width: 90%;
        transform: none;
    }

    .side-image:hover {
        transform: scale(1.05);
    }

    .hero-title {
        font-size: 2.3rem;
    }

    .description-main {
        flex-direction: column-reverse;
        text-align: center;
        gap: 40px;
    }

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

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

    .why-main {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

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

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

    .side-image-alt {
        max-width: 90%;
        transform: none;
    }

    .feature-item:hover {
        transform: none;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid,
    .pricing-cards {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }
}