/* ==========================================================================
   Workout To Watch - Landing Page Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Colors - monochrome palette */
    --color-primary: #1D1D1F;
    --color-primary-dark: #000000;
    --color-primary-light: #3A3A3C;

    --color-bg-dark: #1D1D1F;
    --color-bg-darker: #000000;
    --color-bg-light: #F5F5F7;
    --color-bg-white: #FFFFFF;

    --color-text-dark: #1D1D1F;
    --color-text-secondary: #86868B;
    --color-text-light: #FFFFFF;
    --color-text-muted: #6E6E73;

    --color-border: #E5E5E7;
    --color-border-dark: #3A3A3C;

    --color-accent: #1D1D1F;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px -10px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-dark);
    background-color: var(--color-bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-dark);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.25rem;
}

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

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-light);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.nav-logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.nav-logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-dark);
}

.nav-cta {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

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

.lang-switcher {
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-switcher:hover {
    color: var(--color-text-dark);
    border-color: var(--color-text-dark);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    padding-top: calc(72px + var(--spacing-4xl));
    padding-bottom: var(--spacing-4xl);
    background: linear-gradient(180deg, var(--color-bg-light) 0%, var(--color-bg-white) 100%);
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    text-align: center;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-dark);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
}

.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: auto;
}

.phone-screen {
    width: 100%;
    border-radius: 32px;
    box-shadow: var(--shadow-xl);
}

@media (min-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }

    .hero-content {
        text-align: left;
    }

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

    .phone-mockup {
        width: 320px;
    }
}

@media (min-width: 1024px) {
    .phone-mockup {
        width: 360px;
    }
}

/* --------------------------------------------------------------------------
   Features Section
   -------------------------------------------------------------------------- */
.features {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-white);
}

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

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

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

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin-bottom: var(--spacing-lg);
    background: var(--color-primary);
    border-radius: var(--radius-md);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-text-light);
}

.feature-title {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-dark);
}

.feature-description {
    font-size: 0.9375rem;
    line-height: 1.5;
}

@media (min-width: 640px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Activities Section
   -------------------------------------------------------------------------- */
.activities {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-dark);
}

.activities .section-title,
.activities .section-subtitle {
    color: var(--color-text-light);
}

.activities .section-subtitle {
    opacity: 0.8;
}

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

.activity-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-bg-darker);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-dark);
    transition: all var(--transition-normal);
}

.activity-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.activity-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-full);
}

.activity-icon svg {
    width: 32px;
    height: 32px;
}

.activity-icon-running {
    background: rgba(255, 107, 107, 0.15);
    color: var(--color-running);
}

.activity-icon-trail {
    background: rgba(76, 175, 80, 0.15);
    color: var(--color-trail);
}

.activity-icon-cycling {
    background: rgba(33, 150, 243, 0.15);
    color: var(--color-cycling);
}

.activity-title {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.activity-description {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

@media (min-width: 768px) {
    .activities-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --------------------------------------------------------------------------
   Pricing Section
   -------------------------------------------------------------------------- */
.pricing {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-light);
}

.pricing-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 2px solid var(--color-border);
    transition: all var(--transition-normal);
}

.pricing-card-featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
    position: relative;
}

.pricing-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
    background: var(--color-bg-light);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.pricing-badge-featured {
    background: var(--color-primary);
    color: var(--color-text-light);
}

.pricing-price {
    margin-bottom: var(--spacing-xl);
}

.pricing-amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-text-dark);
}

.pricing-period {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

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

.pricing-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    font-size: 0.9375rem;
    color: var(--color-text-dark);
}

.pricing-feature-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--color-primary);
}

.pricing-feature-disabled {
    color: var(--color-text-muted);
}

.pricing-feature-disabled .pricing-feature-icon {
    color: var(--color-text-muted);
}

.pricing-cta {
    width: 100%;
}

@media (min-width: 768px) {
    .pricing-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-card-featured {
        transform: scale(1.02);
    }
}

/* --------------------------------------------------------------------------
   FAQ Section
   -------------------------------------------------------------------------- */
.faq {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-white);
}

.faq-list {
    max-width: 720px;
    margin: 0 auto;
}

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

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-lg) 0;
    font-size: 1.0625rem;
    font-weight: 600;
    text-align: left;
    color: var(--color-text-dark);
    transition: color var(--transition-fast);
}

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

.faq-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    color: var(--color-text-secondary);
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

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

.faq-answer p {
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background: var(--color-bg-dark);
    color: var(--color-text-light);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border-dark);
}

.footer-brand {
    text-align: center;
}

.footer-logo {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    margin: 0 auto var(--spacing-md);
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

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

.footer-column-title {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

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

.footer-link {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-text-muted);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr auto;
        text-align: left;
    }

    .footer-brand {
        text-align: left;
    }

    .footer-logo {
        margin: 0 0 var(--spacing-md);
    }

    .footer-links {
        gap: var(--spacing-3xl);
    }
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}