/* ===== CSS Variables ===== */
:root {
    --primary-color: #6C63FF;
    --primary-light: #8B85FF;
    --primary-dark: #4F46E5;
    --secondary-color: #FF6B9D;
    --secondary-light: #FF8FB9;
    --accent-color: #00D9C4;
    --accent-light: #00F5DD;
    
    /* Baby-themed pastel colors */
    --baby-pink: #FFB6C1;
    --baby-blue: #87CEEB;
    --baby-yellow: #FFE4A0;
    --baby-green: #98FB98;
    --baby-lavender: #E6E6FA;
    --baby-peach: #FFDAB9;
    
    /* Neutral colors */
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --border-color: #E5E7EB;
    
    /* Gradient backgrounds */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-baby: linear-gradient(135deg, #FFB6C1 0%, #87CEEB 50%, #E6E6FA 100%);
    --gradient-calm: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 40px rgba(108, 99, 255, 0.15);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

img {
    max-width: 100%;
    display: block;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { color: var(--text-secondary); }

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

/* ===== Header ===== */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 2rem;
}

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-normal);
}

.nav-links a:hover::after {
    width: 100%;
}

/* ===== Hero Section ===== */
.hero {
    background: var(--gradient-calm);
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* ===== Month Selector ===== */
.month-selector {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    margin: 0 auto;
}

.selector-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.selector-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.selector-wrapper {
    display: flex;
    gap: 1rem;
}

.custom-select {
    flex: 1;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-primary);
    cursor: pointer;
    transition: var(--transition-normal);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236B7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
    padding-right: 3rem;
}

.custom-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.gender-selector {
    display: flex;
    gap: 0.5rem;
}

.gender-btn {
    padding: 1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    cursor: pointer;
    transition: var(--transition-normal);
    font-size: 1.5rem;
}

.gender-btn:hover {
    border-color: var(--primary-light);
}

.gender-btn.active {
    border-color: var(--primary-color);
    background: rgba(108, 99, 255, 0.1);
}

/* ===== Info Cards Section ===== */
.info-section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    margin-bottom: 0.5rem;
}

.section-title p {
    font-size: 1.1rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* ===== Info Card ===== */
.info-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-normal);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.info-card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.card-icon.sleep { background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); }
.card-icon.vitamin { background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%); }
.card-icon.weight { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.card-icon.nutrition { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); }

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--text-light);
}

.card-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stat-value {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

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

/* Progress bar for ranges */
.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: var(--transition-slow);
}

.progress-fill.sleep { background: linear-gradient(90deg, #6366f1, #8b5cf6); }
.progress-fill.vitamin { background: linear-gradient(90deg, #f59e0b, #f97316); }
.progress-fill.weight { background: linear-gradient(90deg, #10b981, #059669); }
.progress-fill.nutrition { background: linear-gradient(90deg, #ef4444, #dc2626); }

/* ===== Important Notes ===== */
.notes-section {
    background: var(--gradient-calm);
    padding: 4rem 0;
}

.notes-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.notes-card h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.notes-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.notes-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.notes-list li::before {
    content: '⚠️';
    flex-shrink: 0;
}

/* ===== Footer ===== */
.footer {
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    color: var(--bg-primary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-light);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--bg-primary);
    padding-left: 0.5rem;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* ===== Mobile Responsiveness ===== */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero {
        padding: 3rem 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .month-selector {
        padding: 1.5rem;
    }
    
    .selector-wrapper {
        flex-direction: column;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .info-card {
        padding: 1.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

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

.info-card {
    animation: fadeIn 0.5s ease-out forwards;
}

.info-card:nth-child(1) { animation-delay: 0.1s; }
.info-card:nth-child(2) { animation-delay: 0.2s; }
.info-card:nth-child(3) { animation-delay: 0.3s; }
.info-card:nth-child(4) { animation-delay: 0.4s; }

/* ===== Legal Pages ===== */
.legal-page {
    padding: 4rem 0;
    min-height: calc(100vh - 200px);
}

.legal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-md);
}

.legal-content h1 {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.legal-content h2 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: var(--primary-color);
}

.legal-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.legal-content ul, .legal-content ol {
    margin: 1rem 0 1rem 2rem;
    color: var(--text-secondary);
}

.legal-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

/* ===== Contact Form ===== */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 600px;
    margin: 2rem auto 0;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===== About Page ===== */
.about-hero {
    text-align: center;
    padding: 3rem 0;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-feature {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.about-feature .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.about-feature h3 {
    margin-bottom: 0.5rem;
}