@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@500;700;800&display=swap');

:root {
    /* Color Palette - Vibrant Red "Love" Theme */
    --primary: #ef4444;       /* Main Love Red */
    --primary-hover: #dc2626;
    --secondary: #991b1b;     /* Deep Crimson */
    --accent: #f87171;        /* Soft Rosy Red */
    
    --bg-main: #fcfcfd;
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-nav: rgba(252, 252, 253, 0.8);
    
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --text-on-primary: #ffffff;
    
    --border: rgba(239, 68, 68, 0.1);
    --shadow: 0 10px 15px -3px rgba(153, 27, 27, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(153, 27, 27, 0.1);
    
    --glass-bg: rgba(255, 255, 255, 0.5);
    --glass-border: rgba(239, 68, 68, 0.1);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-main: #0c0000;
    --bg-card: rgba(30, 0, 0, 0.7);
    --bg-nav: rgba(12, 0, 0, 0.82);
    
    --text-main: #fee2e2;
    --text-muted: #fca5a5;
    
    --border: rgba(239, 68, 68, 0.2);
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    
    --glass-bg: rgba(20, 0, 0, 0.4);
    --glass-border: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

h1, h2, h3, h4, .font-heading {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
    transition: var(--transition);
}

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

.card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

/* Layout Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: scale(1.02);
}

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

.animate-fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

/* Header & Navigation */
.sticky-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

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

.nav-logo {
    height: 45px;
    width: auto;
    object-fit: contain;
}

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

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

/* Dropdown */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    min-width: 200px;
    top: 100%;
    left: 0;
    border-radius: 12px;
    padding: 0.5rem;
    margin-top: 0.5rem;
    z-index: 1001;
}

.dropdown-content a {
    display: block;
    padding: 0.75rem 1rem;
    border-radius: 8px;
}

.dropdown-content a:hover {
    background: var(--border);
}

.dropdown:hover .dropdown-content {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

/* Footer */
footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
}

.footer-brand p {
    margin-top: 1rem;
    color: var(--text-muted);
    max-width: 300px;
}

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

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

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

.footer-links a {
    color: var(--text-muted);
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Typography Utilities */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Tool Hero Section */
.tool-hero {
    text-align: center;
    padding: 4rem 0;
}

.tool-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tool-hero p {
    color: var(--text-muted);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

input {
    width: 100%;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-main);
    color: var(--text-main);
    font-family: inherit;
    transition: var(--transition);
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    outline: none;
}

/* Result Display */
.result-container {
    margin-top: 2rem;
    padding: 2rem;
    border-radius: 15px;
    display: none;
    text-align: center;
}

.result-percentage {
    font-size: 4rem;
    font-weight: 800;
    margin: 1rem 0;
}

/* Responsive */
@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .nav-links {
        display: none;
    }
    .tool-hero h1 {
        font-size: 2rem;
    }
}