/* ================================
   VARIABLES & RESET
   ================================ */

:root {
    --color-bg-light: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-card: #ffffff;
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #666666;
    --color-accent: #1883FC;
    --color-accent-hover: #0d6edb;
    --color-border: #e5e7eb;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    --spacing-xxl: 120px;
    --max-width: 1200px;
    --border-radius: 12px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg-light);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ================================
   NAVIGATION
   ================================ */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
}

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

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s ease;
}

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

.nav-links .cta-button {
    background-color: var(--color-accent);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

.nav-links .cta-button:hover {
    background-color: var(--color-accent-hover);
    color: white;
}

/* ================================
   HERO SECTION
   ================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.hero-cta {
    margin-bottom: var(--spacing-sm);
}

.primary-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background-color: var(--color-accent);
    color: white;
    padding: 16px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(24, 131, 252, 0.3);
}

.primary-button:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(24, 131, 252, 0.4);
}

.hero-note {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* Phone Mockup / Screenshot */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-screenshot {
    width: auto;
    height: 600px;
    max-width: 100%;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.2));
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #e5e7eb, #d1d5db);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    position: relative;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 25px;
    background-color: #1a1a1a;
    border-radius: 0 0 20px 20px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 32px;
    overflow: hidden;
}

.app-preview {
    padding: var(--spacing-md);
    background: white;
    height: 100%;
}

.app-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid #e0e0e0;
    margin-bottom: var(--spacing-md);
}

.menu-icon {
    font-size: 20px;
    color: #4A5368;
}

.app-title {
    font-size: 14px;
    color: #666;
    font-style: italic;
}

.date-display {
    text-align: center;
    font-size: 20px;
    font-weight: 600;
    color: #333;
    margin-bottom: var(--spacing-lg);
}

.record-section {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.record-button {
    width: 96px;
    height: 96px;
    background-color: var(--color-accent);
    border-radius: 50%;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 16px rgba(24, 131, 252, 0.3);
}

.record-button:hover {
    transform: scale(1.05);
}

.mic-icon {
    font-size: 32px;
}

.pulse-ring {
    position: absolute;
    width: 120px;
    height: 120px;
    border: 3px solid var(--color-accent);
    border-radius: 50%;
    opacity: 0;
    animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.8);
        opacity: 0.8;
    }
    100% {
        transform: scale(1.3);
        opacity: 0;
    }
}

.record-instruction {
    font-size: 12px;
    color: #666;
}

.entry-preview {
    background-color: #f5f5f5;
    padding: var(--spacing-sm);
    border-radius: 8px;
}

.entry-date {
    font-size: 12px;
    color: #999;
    font-style: italic;
    margin-bottom: var(--spacing-xs);
}

.entry-text {
    font-size: 14px;
    color: #333;
    font-family: Georgia, serif;
    line-height: 1.6;
}

.on-this-day-section {
    margin-top: var(--spacing-md);
}

.section-header {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin-bottom: var(--spacing-sm);
}

.past-entry {
    background-color: #f5f5f5;
    padding: var(--spacing-sm);
    border-radius: 8px;
    margin-bottom: var(--spacing-xs);
}

.past-entry-year {
    font-size: 12px;
    color: #999;
    font-style: italic;
    margin-bottom: 4px;
}

.past-entry-text {
    font-size: 13px;
    color: #333;
    font-family: Georgia, serif;
    line-height: 1.5;
}

.past-entry-collapsed {
    background-color: #f5f5f5;
    padding: var(--spacing-sm);
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.expand-icon {
    color: #999;
    font-size: 16px;
}

/* ================================
   WHY JOURNALING SECTION
   ================================ */

.why-journaling {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-bg-light);
}

.journaling-benefits {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.benefit-item {
    text-align: left;
}

.benefit-number {
    font-size: 72px;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.15;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.benefit-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.benefit-text {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ================================
   FEATURES SECTION
   ================================ */

.features {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-bg-secondary);
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background-color: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(24, 131, 252, 0.3);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ================================
   HOW IT WORKS
   ================================ */

.how-it-works {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-bg-light);
}

.steps-container {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.step {
    flex: 1;
    display: flex;
    gap: var(--spacing-md);
}

.step-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.3;
    line-height: 1;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.step-description {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ================================
   PRIVACY SECTION
   ================================ */

.privacy-section {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-bg-secondary);
}

.privacy-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.privacy-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.privacy-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.privacy-features {
    list-style: none;
    font-size: 16px;
    color: var(--color-text-secondary);
}

.privacy-features li {
    padding: var(--spacing-xs) 0;
    line-height: 1.8;
}

.privacy-visual {
    display: flex;
    justify-content: center;
}

.privacy-badge {
    background: linear-gradient(145deg, #f8f9fa, #e5e7eb);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border: 1px solid var(--color-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.shield-icon {
    font-size: 48px;
}

.badge-title {
    font-size: 20px;
    font-weight: 600;
}

.badge-subtitle {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ================================
   TESTIMONIALS
   ================================ */

.testimonials {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.testimonial-card {
    background-color: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.testimonial-text {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.testimonial-author {
    font-size: 14px;
    color: var(--color-accent);
    font-weight: 600;
}

/* ================================
   FAQ
   ================================ */

.faq {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-bg-secondary);
}

.faq-list {
    max-width: 800px;
    margin: var(--spacing-xl) auto 0;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-md) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    color: var(--color-text-primary);
    font-size: 18px;
    font-weight: 600;
    text-align: left;
    transition: color 0.3s ease;
}

.faq-question:hover {
    color: var(--color-accent);
}

.faq-icon {
    font-size: 24px;
    transition: transform 0.3s ease;
}

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

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

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: var(--spacing-md);
}

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

/* ================================
   DOWNLOAD CTA
   ================================ */

.download-cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e5e7eb 100%);
    text-align: center;
}

.cta-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.cta-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.cta-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.app-store-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.app-store-button {
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: var(--color-bg-card);
    color: var(--color-text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.app-store-button:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.button-text {
    text-align: left;
}

.button-label {
    font-size: 11px;
    color: var(--color-text-secondary);
}

.button-store {
    font-size: 18px;
    font-weight: 600;
}

.cta-note {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ================================
   FOOTER
   ================================ */

.footer {
    background-color: var(--color-bg-light);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    font-size: 18px;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */

@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-title {
        font-size: 42px;
    }

    .journaling-benefits {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps-container {
        flex-direction: column;
    }

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

@media (max-width: 640px) {
    .nav-links a:not(.cta-button) {
        display: none;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-title {
        font-size: 32px;
    }

    .section-subtitle {
        font-size: 18px;
    }

    .journaling-benefits {
        grid-template-columns: 1fr;
    }

    .benefit-number {
        font-size: 56px;
    }

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

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

    .phone-mockup {
        width: 250px;
        height: 500px;
    }

    .app-screenshot {
        height: 500px;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* ================================
   PROMPT PACKS SECTION (Homepage)
   ================================ */

.prompt-packs-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-bg-secondary);
}

.prompt-packs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
    margin-bottom: 48px;
}

.prompt-pack-card {
    background: white;
    padding: 40px 32px;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    position: relative;
}

.prompt-pack-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.pack-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--color-accent);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pack-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

.pack-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.pack-description {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.pack-price {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 16px;
}

.pack-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: color 0.3s ease;
}

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

.packs-cta {
    text-align: center;
    margin-top: 40px;
}

.secondary-button {
    display: inline-block;
    padding: 16px 32px;
    background: white;
    color: var(--color-text-primary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid var(--color-border);
}

.secondary-button:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

@media (max-width: 768px) {
    .prompt-packs-grid {
        grid-template-columns: 1fr;
    }
}