/* Fitby Stylesheet */

:root {
    /* Light mode variables (default) */
    --primary: #4f46e5; /* Blue */
    --primary-dark: #4338ca;
    --secondary: #fbbf24; /* Yellow */
    --secondary-dark: #f59e0b;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --bg-body: #ffffff;
    --bg-alt: #f9fafb;
    --bg-card: #ffffff;
    --border-color: #f3f4f6;
    --header-bg: rgba(255, 255, 255, 0.9);
    --white: #ffffff;
    --container-width: 1100px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --bg-body: #0f172a;
    --bg-alt: #1e293b;
    --bg-card: #1e293b;
    --border-color: #334155;
    --header-bg: rgba(15, 23, 42, 0.9);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-body);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3 {
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-main);
}

h1 {
    font-size: 3rem;
    font-weight: 800;
}

h2 {
    font-size: 2.25rem;
    font-weight: 700;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    font-size: 1.125rem;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background-color: var(--secondary);
    color: #1f2937; /* Always dark text on yellow */
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.25rem;
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    border-radius: 0.5rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--border-color);
}

.theme-toggle i {
    width: 20px;
    height: 20px;
}

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

/* Default state for icons */
.sun-icon { display: none; }
.moon-icon { display: block; }

/* Header & Nav */
header {
    padding: 1rem 0;
    position: sticky;
    top: 0;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
}

.logo-icon {
    font-size: 1.75rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a:not(.btn) {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:not(.btn):hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    padding: 6rem 2rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 4rem;
}

.hero-content {
    max-width: 600px;
}

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

.phone-mockup {
    background: var(--bg-alt);
    border-radius: 2rem;
    padding: 2rem 1rem;
    height: 400px;
    width: 280px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    border: 8px solid #374151;
}

.chat-bubble {
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    max-width: 85%;
}

.chat-bubble.bot {
    background: var(--bg-card);
    color: var(--text-main);
    align-self: flex-start;
    border-bottom-left-radius: 0.25rem;
    border: 1px solid var(--border-color);
}

.chat-bubble.user {
    background: #dcf8c6; /* WhatsApp user green */
    align-self: flex-end;
    border-bottom-right-radius: 0.25rem;
    color: #000;
}

/* Features Section */
.features {
    padding: 6rem 2rem;
    background-color: var(--bg-alt);
    border-radius: 3rem;
    margin-bottom: 4rem;
    transition: background-color 0.3s ease;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 1.5rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon.blue {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary);
}

.feature-icon.yellow {
    background-color: rgba(251, 191, 36, 0.1);
    color: var(--secondary-dark);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

/* CTA Section */
.cta-section {
    padding: 6rem 2rem;
    text-align: center;
}

.cta-content {
    background: var(--primary);
    padding: 4rem 2rem;
    border-radius: 2rem;
    color: var(--white);
}

.cta-content h2 {
    color: var(--white);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
}

.cta-content .btn-primary {
    background-color: var(--secondary);
    color: #1f2937;
}

.cta-content .btn-primary:hover {
    background-color: var(--secondary-dark);
}

/* Footer */
footer {
    padding: 4rem 0 2rem;
    background: #111827;
    color: var(--white);
}

footer .logo-text {
    color: var(--white);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    margin-top: 1rem;
    color: #9ca3af;
}

.footer-links h4 {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid #374151;
    text-align: center;
    color: #6b7280;
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.25rem;
    }
    
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 4rem 1rem;
    }
    
    .hero-content {
        margin: 0 auto;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .nav-links {
        display: none; /* Simple mobile: hide nav links */
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}