/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #F5F0FF;
    --bg-secondary: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --text-primary: #f5f5f5;
    --text-secondary: #9ca3af;
    --shadow: rgba(255, 255, 255, 0.05);
    --shadow-lg: rgba(255, 255, 255, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px var(--shadow);
    transition: background-color 0.3s ease;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

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

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

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

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

[data-theme="dark"] .sun {
    display: inline;
}

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

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

[data-theme="light"] .moon {
    display: inline;
}

/* Hero Section */
.hero {
    padding: 10rem 0 6rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--accent-primary);
}

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

.color-palette-demo {
    display: flex;
    justify-content: center;
    gap: 1rem;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.color-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    box-shadow: 0 4px 15px var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.color-circle:nth-child(1) { animation-delay: 0s; }
.color-circle:nth-child(2) { animation-delay: 0.2s; }
.color-circle:nth-child(3) { animation-delay: 0.4s; }
.color-circle:nth-child(4) { animation-delay: 0.6s; }
.color-circle:nth-child(5) { animation-delay: 0.8s; }

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--shadow-lg);
}

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

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 6rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

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

.stats {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.mood-calendar-demo {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 8px 30px var(--shadow-lg);
}

.calendar-header {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.calendar-day {
    aspect-ratio: 1;
    border-radius: 12px;
    box-shadow: 0 2px 10px var(--shadow);
    transition: transform 0.3s ease;
}

.calendar-day:hover {
    transform: scale(1.05);
}

/* Download Section */
.download {
    padding: 6rem 0;
    background: var(--bg-secondary);
    text-align: center;
}

.download-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.download-content p {
    color: var(--text-secondary);
    font-size: 1.25rem;
    margin-bottom: 3rem;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-primary);
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: 0 4px 15px var(--shadow);
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--shadow-lg);
}

.btn-icon {
    width: 40px;
    height: 40px;
}

.btn-icon svg {
    width: 100%;
    height: 100%;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.btn-text .small {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.btn-text .large {
    font-size: 1.125rem;
    font-weight: 600;
}

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

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

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.75rem;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--shadow);
    color: var(--text-secondary);
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .stats {
        gap: 1.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-btn {
        width: 100%;
        max-width: 300px;
    }
}

/* Contact Page Styles */
.contact-hero {
    padding: 8rem 0 4rem;
    min-height: 100vh;
}

.page-title {
    font-size: 3.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.last-updated {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

/* Contact Form */
.contact-form-wrapper {
    position: relative;
}

.contact-form {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid transparent;
    background: var(--bg-primary);
    border-radius: 10px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
    font-family: inherit;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group input.invalid {
    border-color: #ef4444;
}

.form-success {
    background: var(--bg-secondary);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px var(--shadow);
    text-align: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    margin: 0 auto 1.5rem;
}

.form-success h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.form-success p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Contact Info Cards */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 15px var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px var(--shadow-lg);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.contact-card a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.contact-card a:hover {
    color: var(--accent-secondary);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.contact-details p {
    margin-bottom: 0.75rem;
}

/* FAQ Section */
.faq-section {
    max-width: 900px;
    margin: 4rem auto 0;
}

.faq-section h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px var(--shadow);
    transition: box-shadow 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 4px 15px var(--shadow-lg);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0;
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--accent-primary);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.faq-answer a {
    color: var(--accent-primary);
    text-decoration: none;
}

.faq-answer a:hover {
    text-decoration: underline;
}

/* Privacy Policy Styles */
.policy-hero {
    padding: 8rem 0 4rem;
}

.policy-content {
    max-width: 900px;
    margin: 0 auto;
}

.policy-intro {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 20px var(--shadow);
}

.policy-intro p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.policy-sections {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.policy-section {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 15px var(--shadow);
}

.policy-section h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.policy-section h3 {
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.policy-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.policy-section ul {
    list-style: none;
    padding-left: 0;
    margin: 1rem 0;
}

.policy-section ul li {
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.7;
}

.policy-section ul li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
    font-size: 1.2rem;
}

.policy-section a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
}

.policy-section a:hover {
    text-decoration: underline;
}

.policy-section strong {
    color: var(--text-primary);
    font-weight: 600;
}

.policy-footer {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
    color: white;
}

.policy-footer h2 {
    color: white;
    margin-bottom: 1rem;
}

.policy-footer p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    line-height: 1.8;
}

/* Responsive Styles for New Pages */
@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 2.5rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .policy-section {
        padding: 1.5rem;
    }

    .policy-section h2 {
        font-size: 1.5rem;
    }

    .faq-section h2 {
        font-size: 2rem;
    }
}