/* ==========================================================================
   BirdWatchAI Website Styles
   A nature-inspired, professional design for bird enthusiasts
   ========================================================================== */

:root {
    /* Color Palette - Forest & Sky */
    --color-primary: #2d5a3d;          /* Deep forest green */
    --color-primary-light: #3d7a52;
    --color-primary-dark: #1e3d29;
    
    --color-secondary: #8fbc8f;        /* Soft sage */
    --color-accent: #d4a574;           /* Warm wood/branch */
    --color-accent-light: #e8c9a0;
    
    --color-sky: #87ceeb;              /* Sky blue */
    --color-sky-light: #b0e0e6;
    
    /* Neutrals */
    --color-cream: #faf8f5;
    --color-white: #ffffff;
    --color-gray-100: #f5f3f0;
    --color-gray-200: #e8e5e0;
    --color-gray-300: #d1cdc6;
    --color-gray-500: #7a756d;
    --color-gray-700: #4a4640;
    --color-gray-900: #2a2825;
    
    /* Typography */
    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;
    
    /* Borders & Shadows */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 2px 8px rgba(45, 90, 61, 0.08);
    --shadow-md: 0 4px 20px rgba(45, 90, 61, 0.12);
    --shadow-lg: 0 8px 40px rgba(45, 90, 61, 0.16);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--color-gray-700);
    background-color: var(--color-cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--color-gray-900);
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

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

a:hover {
    color: var(--color-primary-light);
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

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

.btn-block {
    width: 100%;
}

.btn-nav {
    padding: 0.5rem 1.25rem;
    font-size: 0.9375rem;
}

.btn-disabled {
    background: var(--color-gray-300);
    color: var(--color-gray-500);
    border-color: var(--color-gray-300);
    cursor: not-allowed;
}

.btn-disabled:hover {
    background: var(--color-gray-300);
    color: var(--color-gray-500);
    border-color: var(--color-gray-300);
    transform: none;
    box-shadow: none;
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 248, 245, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-primary);
}

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

.nav-logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

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

.nav-links a:not(.btn) {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-gray-700);
}

.nav-links a:not(.btn):hover {
    color: var(--color-primary);
}

.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav-mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    transition: var(--transition-fast);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-cream);
        flex-direction: column;
        padding: var(--space-md);
        gap: var(--space-sm);
        border-bottom: 1px solid var(--color-gray-200);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-mobile-toggle {
        display: flex;
    }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    min-height: 100vh;
    padding: calc(70px + var(--space-2xl)) var(--space-md) var(--space-2xl);
    max-width: 1400px;
    margin: 0 auto;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    opacity: 0.08;
    border-radius: 0 0 0 50%;
    z-index: -1;
}

.hero-content {
    padding-left: var(--space-lg);
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-accent-light);
    color: var(--color-gray-900);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.hero h1 {
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-lg);
    max-width: 520px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.hero-trial-note {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.hero-image {
    position: relative;
}

.hero-screenshot-wrapper {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-5deg);
}

.hero-screenshot-placeholder {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-500);
    font-size: 1.25rem;
}

@media (max-width: 968px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: calc(70px + var(--space-xl));
    }
    
    .hero-content {
        padding-left: 0;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .hero-screenshot-wrapper {
        transform: none;
    }
    
    .hero-bg {
        width: 100%;
        border-radius: 0 0 50% 50%;
    }
}

/* ==========================================================================
   Stats Section
   ========================================================================== */

.stats {
    background: var(--color-primary);
    padding: var(--space-xl) var(--space-md);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-white);
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--color-secondary);
}

@media (max-width: 600px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}

/* ==========================================================================
   Section Headers
   ========================================================================== */

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-gray-500);
    margin-top: var(--space-sm);
}

/* ==========================================================================
   Features Section
   ========================================================================== */

.features {
    padding: var(--space-3xl) var(--space-md);
    background: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.feature-card {
    background: var(--color-cream);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.feature-card-main {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
}

.feature-card-main h3,
.feature-card-main p {
    color: #ffffff !important;
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.feature-card h3 {
    margin-bottom: var(--space-xs);
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--color-gray-500);
}

.features-grid .feature-card-main p {
    color: #ffffff !important;
    opacity: 1;
}

@media (min-width: 768px) {
    .feature-card-main {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: var(--space-md);
        align-items: center;
    }
    
    .feature-card-main .feature-icon {
        font-size: 3rem;
        margin-bottom: 0;
    }
}

/* ==========================================================================
   How It Works Section
   ========================================================================== */

.how-it-works {
    padding: var(--space-3xl) var(--space-md);
    background: var(--color-cream);
}

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

.step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.step:last-child {
    border-bottom: none;
}

.step-number {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-white);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: var(--radius-full);
}

.step-content h3 {
    margin-bottom: var(--space-xs);
}

.step-content p {
    color: var(--color-gray-500);
}

@media (max-width: 600px) {
    .step {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .step-number {
        margin: 0 auto var(--space-sm);
    }
}

/* ==========================================================================
   Gallery Section
   ========================================================================== */

.gallery {
    padding: var(--space-3xl) var(--space-md);
    background: var(--color-white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: var(--space-md);
}

.gallery-item {
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-item-large {
    grid-column: 1 / 3;
    grid-row: 1 / 3;
}

.gallery-placeholder {
    width: 100%;
    height: 100%;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-500);
    font-size: 0.9375rem;
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 100%);
}

.gallery-item-large .gallery-placeholder {
    min-height: 400px;
}

/* Extended gallery layout for more screenshots */
.gallery-grid-extended {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: auto;
}

.gallery-grid-extended .gallery-item-large {
    grid-column: 1 / 3;
    grid-row: 1 / 3;
}

.gallery-item-wide {
    grid-column: span 2;
}

.gallery-item-wide img {
    object-fit: contain;
    background: var(--color-gray-900);
}

.gallery-item-full {
    grid-column: 1 / -1;
}

.gallery-item-full img {
    object-fit: contain;
    background: var(--color-gray-900);
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto;
    }
    
    .gallery-item-large {
        grid-column: 1 / -1;
        grid-row: auto;
    }
    
    .gallery-grid-extended {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid-extended .gallery-item-large,
    .gallery-item-wide,
    .gallery-item-full {
        grid-column: 1 / -1;
    }
}

/* ==========================================================================
   Pricing Section
   ========================================================================== */

.pricing {
    padding: var(--space-3xl) var(--space-md);
    background: linear-gradient(180deg, var(--color-cream) 0%, var(--color-gray-100) 100%);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    max-width: 800px;
    margin: 0 auto;
}

.pricing-cards-three {
    max-width: 1100px;
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 968px) {
    .pricing-cards-three {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

.pricing-card {
    position: relative;
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
}

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

.pricing-card-nest {
    border-color: var(--color-sky);
    background: linear-gradient(180deg, #f0f9ff 0%, var(--color-white) 100%);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.375rem 1rem;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.pricing-badge-soon {
    background: var(--color-sky);
    color: var(--color-gray-900);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-gray-200);
}

.pricing-header h3 {
    margin-bottom: var(--space-sm);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--space-xs);
}

.price-amount {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
}

.price-period {
    font-size: 0.9375rem;
    color: var(--color-gray-500);
}

.pricing-description {
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    text-align: center;
    margin-bottom: var(--space-md);
    line-height: 1.5;
}

.pricing-features {
    margin-bottom: var(--space-lg);
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
}

.pricing-features .check {
    color: var(--color-primary);
    font-weight: 700;
}

.pricing-features .muted {
    color: var(--color-gray-500);
}

.pricing-features-icons li {
    font-size: 0.9375rem;
}

.pricing-features-icons .check {
    font-weight: normal;
    min-width: 1.5em;
}

.pricing-note {
    text-align: center;
    font-size: 0.9375rem;
    color: var(--color-gray-500);
    margin-top: var(--space-lg);
}

/* ==========================================================================
   Requirements Section
   ========================================================================== */

.requirements {
    padding: var(--space-3xl) var(--space-md);
    background: var(--color-white);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.requirement-card {
    background: var(--color-cream);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
}

.requirement-card h3 {
    margin-bottom: var(--space-sm);
}

.requirement-card ul {
    list-style: disc;
    list-style-position: inside;
}

.requirement-card li {
    padding: 0.25rem 0;
    font-size: 0.9375rem;
    color: var(--color-gray-700);
}

/* ==========================================================================
   Download Section
   ========================================================================== */

.download {
    padding: var(--space-3xl) var(--space-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    text-align: center;
}

.download-content {
    max-width: 600px;
    margin: 0 auto;
}

.download h2 {
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.download > .download-content > p {
    color: var(--color-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
}

.download-btn {
    background: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}

.download-btn:hover {
    background: var(--color-cream);
    border-color: var(--color-cream);
    color: var(--color-primary);
}

.download-info {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-secondary);
}

.download-help {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255,255,255,0.2);
}

.download-help p {
    font-size: 0.9375rem;
    color: var(--color-secondary);
}

.download-help a {
    color: var(--color-white);
    text-decoration: underline;
}

.download-help a:hover {
    color: var(--color-accent-light);
}

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

.faq {
    padding: var(--space-3xl) var(--space-md);
    background: var(--color-cream);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
}

.faq-item h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.125rem;
}

.faq-item p {
    font-size: 0.9375rem;
    color: var(--color-gray-500);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background: var(--color-gray-900);
    padding: var(--space-2xl) var(--space-md) var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    width: 50px;
    height: 50px;
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    color: var(--color-gray-500);
    font-size: 0.9375rem;
}

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

.footer-column h4 {
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.footer-column a {
    display: block;
    color: var(--color-gray-500);
    font-size: 0.9375rem;
    padding: 0.25rem 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-gray-700);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Animations
   ========================================================================== */

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

.hero-content,
.hero-image {
    animation: fadeInUp 0.8s ease-out;
}

.hero-image {
    animation-delay: 0.2s;
    animation-fill-mode: both;
}

/* Smooth scroll reveal for sections */
section {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.stats { animation-delay: 0.1s; }
.features { animation-delay: 0.15s; }
.how-it-works { animation-delay: 0.2s; }
.gallery { animation-delay: 0.25s; }
.pricing { animation-delay: 0.3s; }
.requirements { animation-delay: 0.35s; }
.download { animation-delay: 0.4s; }
.faq { animation-delay: 0.45s; }