/* Love Calculator - lovecalc.org */
:root {
    --bg-primary: #fdf2f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #fce7f3;
    --text-primary: #831843;
    --text-secondary: #9d174d;
    --text-muted: #be185d;
    --border-color: #fbcfe8;
    --accent-primary: #ec4899;
    --accent-secondary: #f43f5e;
    --accent-gradient: linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
    --shadow-sm: 0 1px 2px rgba(236, 72, 153, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(236, 72, 153, 0.15);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

[data-theme="dark"] {
    --bg-primary: #1f1020;
    --bg-secondary: #2d1f30;
    --bg-tertiary: #3d2a40;
    --text-primary: #fce7f3;
    --text-secondary: #fbcfe8;
    --text-muted: #f9a8d4;
    --border-color: #4a3050;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.theme-toggle {
    position: fixed; bottom: 20px; right: 20px;
    width: 50px; height: 50px; border-radius: 50%;
    border: none; background: var(--bg-secondary);
    box-shadow: var(--shadow-md); cursor: pointer; z-index: 1000;
}
.sun-icon, .moon-icon { font-size: 1.5rem; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); transition: opacity 0.3s; }
.moon-icon { opacity: 0; }
[data-theme="dark"] .sun-icon { opacity: 0; }
[data-theme="dark"] .moon-icon { opacity: 1; }

.container { max-width: 700px; margin: 0 auto; padding: 40px 20px; }

header { text-align: center; margin-bottom: 40px; }
h1 {
    font-size: 2.5rem; font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.subtitle { color: var(--text-secondary); font-size: 1.2rem; margin-top: 10px; }

.calculator-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.hearts-decoration { font-size: 2rem; margin-bottom: 20px; }
.hearts-decoration span { margin: 0 5px; animation: float 2s ease-in-out infinite; }
.hearts-decoration span:nth-child(2) { animation-delay: 0.3s; }
.hearts-decoration span:nth-child(3) { animation-delay: 0.6s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.name-inputs { display: flex; align-items: center; gap: 15px; margin-bottom: 30px; }
.input-group { flex: 1; text-align: left; }
.input-group label { display: block; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.input-group input {
    width: 100%; padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    text-align: center;
}
.input-group input:focus { outline: none; border-color: var(--accent-primary); }

.heart-connector { font-size: 2rem; padding-top: 25px; }

.btn {
    padding: 15px 30px; border: none; border-radius: var(--radius-md);
    font-size: 1.1rem; font-weight: 700; cursor: pointer;
}
.btn-primary { background: var(--accent-gradient); color: white; }
.btn-primary:hover { transform: scale(1.05); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); margin-top: 20px; }
.calculate-btn { width: 100%; }

.results { display: none; }

.result-names {
    display: flex; align-items: center; justify-content: center; gap: 15px;
    font-size: 1.3rem; font-weight: 700; margin-bottom: 30px;
    color: var(--text-primary);
}
.heart-icon { font-size: 1.5rem; animation: pulse 1s infinite; }
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.love-meter {
    height: 50px; background: var(--bg-tertiary);
    border-radius: 25px; position: relative;
    overflow: hidden; margin-bottom: 30px;
}
.meter-fill {
    height: 100%; width: 0%;
    background: var(--accent-gradient);
    border-radius: 25px;
    transition: width 0.3s ease-out;
}
.meter-percentage {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem; font-weight: 800;
    color: var(--text-primary);
    text-shadow: 0 1px 2px rgba(255,255,255,0.5);
}

.love-message {
    background: var(--bg-tertiary);
    padding: 25px; border-radius: var(--radius-md);
    margin-bottom: 25px;
}
.message-text { font-size: 1.2rem; color: var(--text-primary); margin-bottom: 10px; }
.percentage-text { color: var(--text-secondary); }

.share-section { margin-bottom: 20px; }
.share-section p { color: var(--text-secondary); margin-bottom: 10px; }
.share-buttons { display: flex; gap: 10px; justify-content: center; }
.share-btn {
    padding: 10px 20px; border: none; border-radius: var(--radius-sm);
    font-size: 0.9rem; cursor: pointer; font-weight: 600;
}
.share-btn.twitter { background: #1da1f2; color: white; }
.share-btn.whatsapp { background: #25d366; color: white; }
.share-btn.copy { background: var(--bg-tertiary); color: var(--text-primary); }

.trust-badges {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px; margin: 50px 0;
}
.badge {
    text-align: center; padding: 20px 15px;
    background: var(--bg-secondary); border-radius: var(--radius-md);
}
.badge-icon { font-size: 2rem; display: block; margin-bottom: 10px; }
.badge-text { display: block; font-weight: 700; margin-bottom: 5px; color: var(--text-primary); }
.badge-desc { font-size: 0.85rem; color: var(--text-secondary); }

.how-it-works { margin: 50px 0; }
.how-it-works h2 { text-align: center; font-size: 1.8rem; margin-bottom: 30px; color: var(--text-primary); }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 25px; }
.step { text-align: center; padding: 25px; }
.step-number {
    width: 50px; height: 50px; background: var(--accent-gradient);
    color: white; border-radius: 50%; display: flex; align-items: center;
    justify-content: center; font-size: 1.5rem; font-weight: 700;
    margin: 0 auto 15px;
}
.step h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--text-primary); }
.step p { color: var(--text-secondary); font-size: 0.95rem; }

.faq-section { margin: 50px 0; }
.faq-section h2 { text-align: center; font-size: 1.8rem; margin-bottom: 30px; }
.faq-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.faq-item { background: var(--bg-secondary); padding: 25px; border-radius: var(--radius-md); }
.faq-item h3 { font-size: 1rem; margin-bottom: 12px; color: var(--text-primary); }
.faq-item p { color: var(--text-secondary); font-size: 0.9rem; }

footer { text-align: center; padding: 40px 20px; border-top: 1px solid var(--border-color); }
footer p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 10px; }
footer a { color: var(--accent-primary); text-decoration: none; }

@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    .name-inputs { flex-direction: column; }
    .heart-connector { padding: 10px 0; }
    .share-buttons { flex-wrap: wrap; }
}