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

:root {
    /* Warm, organic color palette derived from logo's teal/cyan */
    --bg-primary: #fdfcfb;
    --bg-secondary: #f7f6f4;
    --bg-tertiary: #eeedeb;
    --border-color: #e0ddd9;
    --text-primary: #2a2826;
    --text-secondary: #6b6662;
    --text-muted: #9c9691;
    
    /* Accent colors from logo */
    --accent-primary: #2dd4bf; /* Teal */
    --accent-secondary: #14b8a6; /* Deeper teal */
    --accent-tertiary: #0d9488; /* Dark teal */
    --accent-soft: #ccfbf1; /* Soft teal */
    
    /* Semantic colors */
    --success: #10b981;
    --warm-accent: #f59e0b;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3 {
    font-family: 'Fraunces', serif;
    font-weight: 700;
    line-height: 1.2;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.nav {
    position: sticky;
    top: 0;
    background: rgba(253, 252, 251, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 60px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--accent-secondary);
}

.nav-btn {
    padding: 0.75rem 1.5rem;
    background: var(--accent-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(45, 212, 191, 0.2);
}

.nav-btn:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(45, 212, 191, 0.3);
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-family: 'Fraunces', serif;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    color: var(--text-secondary);
    font-weight: 400;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

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

/* USP Section */
.usp-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.usp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.usp-card {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    animation: fadeInUp 0.8s ease backwards;
}

.usp-card:nth-child(1) { animation-delay: 0.1s; }
.usp-card:nth-child(2) { animation-delay: 0.2s; }
.usp-card:nth-child(3) { animation-delay: 0.3s; }

.usp-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    border-color: var(--accent-soft);
}

.usp-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.usp-text {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* Chat Section */
.chat-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.chat-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.chat-container {
    background: white;
    border-radius: var(--radius-xl);
    border: 2px solid var(--border-color);
    padding: var(--spacing-xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    min-height: 500px;
    display: flex;
    flex-direction: column;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    min-height: 0;
    padding-right: var(--spacing-sm);
}

.message {
    max-width: 85%;
    line-height: 1.6;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.message.boopmachine {
    align-self: flex-start;
}

.message.user {
    align-self: flex-end;
}

.message-content {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.message.boopmachine .message-content {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.message.user .message-content {
    background: var(--accent-primary);
    color: white;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 6px;
    padding: var(--spacing-sm) 0;
    align-self: flex-start;
    opacity: 0;
    transition: opacity 0.3s;
}

.typing-indicator.visible {
    opacity: 1;
}

.typing-indicator .dot {
    width: 10px;
    height: 10px;
    background: var(--accent-secondary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator .dot:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-8px); opacity: 1; }
}

/* Input Area */
.input-area {
    display: flex;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

#messageInput {
    flex: 1;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: all 0.2s ease;
}

#messageInput:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.1);
}

#messageInput::placeholder {
    color: var(--text-muted);
}

#messageInput:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#sendButton {
    padding: 1rem 1.5rem;
    background: var(--accent-primary);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(45, 212, 191, 0.2);
}

#sendButton:hover:not(:disabled) {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(45, 212, 191, 0.3);
}

#sendButton:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Footer */
.footer {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

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

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.footer-text a {
    color: var(--accent-secondary);
    text-decoration: none;
}

.footer-text a:hover {
    text-decoration: underline;
}

.footer-boop {
    color: var(--text-muted);
    font-size: 1.1rem;
    font-weight: 500;
}

/* Login Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(42, 40, 38, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.overlay-content {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    max-width: 450px;
    width: 90%;
    position: relative;
    animation: slideUp 0.4s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.overlay-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.overlay-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.overlay-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.overlay-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: 1rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.google-btn:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .logo-img {
        height: 50px;
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        font-size: 0.875rem;
    }
    
    .nav-btn {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }
    
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .usp-section,
    .chat-section {
        padding: var(--spacing-xl) 0;
    }
    
    .usp-grid {
        grid-template-columns: 1fr;
    }
    
    .usp-card {
        padding: var(--spacing-lg);
    }
    
    .chat-container {
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }
    
    .message {
        max-width: 90%;
    }
    
    #messageInput {
        font-size: 16px; /* Prevents iOS zoom */
    }
    
    .overlay-content {
        padding: var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    .nav-links {
        gap: var(--spacing-xs);
    }
    
    .nav-link:not(.nav-btn) {
        display: none;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .chat-container {
        padding: var(--spacing-md);
    }
}