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

:root {
    /* Colors - unchanged */
    --color-primary: #0C121C;
    --color-gradient: #202734;
    --color-accent: #3D5A80;
    --color-accent-light: #4A6FA5;
    --color-text: #FFFFFF;
    --color-text-muted: #A0AEC0;
    --color-surface: rgba(255, 255, 255, 0.04);
    --color-surface-hover: rgba(255, 255, 255, 0.08);
    --color-border: rgba(255, 255, 255, 0.08);

    /* Typography - Premium fonts */
    --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --tracking-tight: -0.02em;
    --tracking-normal: 0;

    /* Layout */
    --max-width: 1200px;

    /* Spacing - More generous for premium feel */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --spacing-2xl: 7rem;
    --spacing-3xl: 10rem;

    /* Border radius - Softer, more organic */
    --border-radius: 16px;
    --border-radius-lg: 24px;
    --border-radius-xl: 32px;

    /* Shadows - Layered, softer, warmer */
    --shadow-sm: 0 1px 2px rgba(12, 18, 28, 0.06), 0 2px 4px rgba(12, 18, 28, 0.06);
    --shadow-md: 0 4px 8px rgba(12, 18, 28, 0.04), 0 12px 24px rgba(12, 18, 28, 0.08);
    --shadow-lg: 0 12px 28px rgba(12, 18, 28, 0.08), 0 24px 56px rgba(12, 18, 28, 0.12);
    --glow-accent: 0 0 48px rgba(61, 90, 128, 0.2);

    /* Transitions - Organic easing */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition: 0.3s var(--ease-out-expo);
    --transition-slow: 0.4s var(--ease-out-expo);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--color-primary);
    color: var(--color-text);
    line-height: 1.7;
    min-height: 100vh;
    font-size: 1rem;
}

/* Subtle grain texture overlay for tactile, premium feel */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 9999;
}

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

a {
    color: inherit;
    text-decoration: none;
}

h1, h2, h3 {
    font-family: var(--font-display);
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: var(--tracking-tight);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 1.25rem;
}

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

section {
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    gap: var(--spacing-xl);
}

.hero-content {
    max-width: 600px;
    animation: fadeUp 0.8s var(--ease-out-expo) both;
}

.hero-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.hero-icon {
    width: clamp(2.5rem, 6vw, 4rem);
    height: clamp(2.5rem, 6vw, 4rem);
    border-radius: 10px;
}

.hero h1 {
    font-size: clamp(2.75rem, 7vw, 4.5rem);
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.03em;
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    letter-spacing: var(--tracking-tight);
}

.hero-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-lg);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.store-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.store-button {
    display: block;
    transition: transform var(--transition), opacity var(--transition);
}

.store-button img {
    height: 52px;
    width: auto;
    display: block;
}

.store-button:hover {
    transform: translateY(-2px);
    filter: drop-shadow(0 4px 12px rgba(61, 90, 128, 0.3));
}

.store-button:active {
    transform: translateY(0);
}

.hero-image {
    max-width: 280px;
    width: 100%;
    animation: fadeUp 0.8s var(--ease-out-expo) 0.2s both;
}

.phone-mockup {
    background: linear-gradient(145deg, #1a1a1a 0%, #0d0d0d 100%);
    border-radius: 44px;
    padding: 6px;
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.05),
        inset 0 1px 1px rgba(255, 255, 255, 0.06),
        inset 0 -1px 1px rgba(0, 0, 0, 0.3),
        0 0 80px -20px rgba(61, 90, 128, 0.25);
}

.phone-mockup img {
    border-radius: 38px;
    width: 100%;
    display: block;
    border: 3px solid rgba(255, 255, 255, 0.1);
}

/* Features Section */
.features {
    max-width: var(--max-width);
    margin: 0 auto;
}

.features h2 {
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    align-items: stretch;
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    transition: transform var(--transition), background var(--transition), box-shadow var(--transition), border-color var(--transition);
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--color-accent);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.05);
}

/* Individual colored glow for each icon on hover */
.feature-card:hover .icon-progress { box-shadow: 0 8px 32px rgba(45, 106, 106, 0.4); }
.feature-card:hover .icon-setup { box-shadow: 0 8px 32px rgba(74, 85, 104, 0.4); }
.feature-card:hover .icon-status { box-shadow: 0 8px 32px rgba(61, 90, 128, 0.4); }
.feature-card:hover .icon-kindness { box-shadow: 0 8px 32px rgba(107, 91, 122, 0.4); }
.feature-card:hover .icon-triggers { box-shadow: 0 8px 32px rgba(92, 107, 92, 0.4); }
.feature-card:hover .icon-streak { box-shadow: 0 8px 32px rgba(139, 90, 90, 0.4); }
.feature-card:hover .icon-celebrate { box-shadow: 0 8px 32px rgba(122, 107, 74, 0.4); }
.feature-card:hover .icon-habits { box-shadow: 0 8px 32px rgba(74, 90, 107, 0.4); }

.feature-icon svg {
    color: var(--color-text);
}

/* Subtle icon color variations */
.feature-icon.icon-progress { background: #2D6A6A; }
.feature-icon.icon-setup { background: #4A5568; }
.feature-icon.icon-status { background: #3D5A80; }
.feature-icon.icon-kindness { background: #6B5B7A; }
.feature-icon.icon-triggers { background: #5C6B5C; }
.feature-icon.icon-streak { background: #8B5A5A; }
.feature-icon.icon-celebrate { background: #7A6B4A; }
.feature-icon.icon-habits { background: #4A5A6B; }

.feature-card h3 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.15rem;
}

.feature-card p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    line-height: 1.7;
    flex-grow: 1;
}

/* Screenshots Section */
.screenshots {
    max-width: var(--max-width);
    margin: 0 auto;
    overflow: hidden;
}

.screenshots h2 {
    margin-bottom: var(--spacing-xl);
}

.screenshots-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    justify-items: center;
}

.screenshot-item {
    text-align: center;
    max-width: 280px;
    width: 100%;
}

.screenshot-item .phone-mockup {
    margin-bottom: var(--spacing-lg);
}

.screenshot-item h3 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.15rem;
}

.screenshot-item p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Use Cases Section */
.use-cases {
    max-width: 100%;
    margin: 0 auto;
    text-align: center;
    overflow: hidden;
}

.use-cases h2 {
    margin-bottom: var(--spacing-xl);
}

.scroll-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

.scroll-row {
    display: flex;
    width: max-content;
}

.scroll-content {
    display: flex;
    gap: var(--spacing-sm);
    padding-right: var(--spacing-sm);
}

.habit-tag {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 50px;
    padding: 0.875rem 1.5rem;
    font-size: 0.95rem;
    white-space: nowrap;
    transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.habit-tag:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(61, 90, 128, 0.4);
    transform: scale(1.02);
}

/* Entrance animation */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Infinite scroll animations */
@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@keyframes scroll-right {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0);
    }
}

.scroll-left {
    animation: scroll-left 50s linear infinite;
}

.scroll-right {
    animation: scroll-right 50s linear infinite;
}

.scroll-slow {
    animation-duration: 70s;
}

.scroll-row:hover {
    animation-play-state: paused;
}

.use-cases-note {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.95rem;
    font-style: normal;
    max-width: 520px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    line-height: 1.7;
}

/* Testimonials Section */
.testimonials {
    max-width: var(--max-width);
    margin: 0 auto;
}

.testimonials h2 {
    margin-bottom: var(--spacing-xl);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    position: relative;
    transition: transform var(--transition), box-shadow var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

/* Quotation mark decoration */
.testimonial-card::before {
    content: '"';
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-lg);
    font-size: 4rem;
    font-family: Georgia, serif;
    color: rgba(255, 255, 255, 0.04);
    line-height: 1;
    pointer-events: none;
}

.stars {
    color: #F5B942;
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 3px;
    opacity: 0.9;
}

.testimonial-text {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
}

.testimonial-author {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    font-weight: 500;
}

/* FAQ Section */
.faq {
    max-width: 800px;
    margin: 0 auto;
}

.faq h2 {
    margin-bottom: var(--spacing-xl);
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.faq-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: background var(--transition), border-color var(--transition);
}

.faq-item.open {
    background: rgba(61, 90, 128, 0.08);
    border-color: rgba(61, 90, 128, 0.2);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    padding: var(--spacing-md);
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    transition: background var(--transition);
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.04);
}

.faq-question:active {
    transform: scale(0.99);
}

.faq-icon {
    font-size: 1.25rem;
    font-weight: 300;
    transition: transform var(--transition);
    flex-shrink: 0;
    opacity: 0.6;
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
    opacity: 1;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease-out-expo);
}

.faq-item.open .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.8;
}

/* Final CTA Section */
.final-cta {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.final-cta h2 {
    margin-bottom: var(--spacing-sm);
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.final-cta p {
    color: rgba(255, 255, 255, 0.65);
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.final-cta .store-buttons {
    justify-content: center;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    transition: color var(--transition);
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width var(--transition);
}

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

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

.copyright {
    color: rgba(255, 255, 255, 0.35);
    font-size: 0.8rem;
}

/* Responsive Design - Small Mobile */
@media (max-width: 480px) {
    section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
        gap: var(--spacing-lg);
        min-height: auto;
        padding-top: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }

    .hero-content,
    .hero-image {
        animation: none;
        opacity: 1;
    }

    .store-button img {
        height: 56px;
    }

    .feature-icon {
        width: 56px;
        height: 56px;
    }

    .feature-card {
        padding: var(--spacing-sm);
    }

    .faq-item.open .faq-answer {
        max-height: 300px;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* Responsive Design - Intermediate (Testimonials) */
@media (min-width: 640px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Responsive Design - Tablet */
@media (min-width: 768px) {
    .hero {
        flex-direction: row;
        text-align: left;
        gap: var(--spacing-2xl);
        padding: var(--spacing-2xl) var(--spacing-xl);
    }

    .hero-content {
        flex: 1;
    }

    .hero-brand {
        justify-content: flex-start;
    }

    .hero-description {
        margin-left: 0;
        margin-right: 0;
    }

    .store-buttons {
        justify-content: flex-start;
    }

    .hero-image {
        max-width: 340px;
    }

    .features-grid {
        gap: var(--spacing-lg);
    }

    .screenshots-container {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
        align-items: start;
    }

    .screenshot-item {
        max-width: 280px;
    }

    .testimonials-grid {
        gap: var(--spacing-lg);
        align-items: stretch;
    }
}

/* Responsive Design - Desktop */
@media (min-width: 1024px) {
    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Center testimonial emphasized */
    .testimonial-card:nth-child(2) {
        background: rgba(255, 255, 255, 0.05);
    }
    section {
        padding: var(--spacing-2xl) var(--spacing-xl);
    }

    .hero {
        padding: var(--spacing-2xl) var(--spacing-xl);
        gap: var(--spacing-3xl);
    }

    .hero-icon {
        width: 4rem;
        height: 4rem;
    }

    .hero-image {
        max-width: 380px;
    }

    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .screenshot-item {
        max-width: 300px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent-light);
    outline-offset: 2px;
}

/* Selection color */
::selection {
    background: var(--color-accent);
    color: var(--color-text);
}