/* ===========================
   Reset & Base Styles
   =========================== */

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

:root {
    /* Colors - Modern Grey Palette */
    --color-bg: #ffffff;
    --color-bg-alt: #fafafa;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-text-lighter: #9ca3af;
    --color-primary: #06b6d4; /* Single accent color - vibrant cyan */
    --color-primary-dark: #0891b2;
    --color-primary-light: #22d3ee;
    --color-border: #e5e7eb;
    --color-code-bg: #f3f4f6;

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

    /* Typography */
    --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;

    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

/* ===========================
   Layout
   =========================== */

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

section {
    padding: var(--spacing-xl) 0;
}

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

.hero {
    background: linear-gradient(to bottom, #ffffff 0%, #fafafa 100%);
    color: var(--color-text);
    text-align: center;
    padding: var(--spacing-xl) 0 calc(var(--spacing-xl) + var(--spacing-md));
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2306b6d4' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 1;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero__emoji {
    font-size: var(--font-size-4xl);
    display: block;
    margin-bottom: var(--spacing-sm);
    animation: float 3s ease-in-out infinite;
}

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

.hero__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    font-weight: 400;
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.7;
}

.hero__note {
    font-size: var(--font-size-sm);
    color: var(--color-text-lighter);
    margin-top: var(--spacing-md);
}

/* ===========================
   CTA Button
   =========================== */

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2.5rem;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: white;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.25);
    font-family: var(--font-base);
}

.cta-button:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(6, 182, 212, 0.35);
}

.cta-button:active:not(:disabled) {
    transform: translateY(0);
}

.cta-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.cta-button--large {
    padding: 1.25rem 3rem;
    font-size: var(--font-size-xl);
}

.cta-button__icon {
    font-size: 1.5em;
}

/* ===========================
   Why Section
   =========================== */

.why {
    background: var(--color-bg);
}

.section__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.why__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.why__card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
}

.why__card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.12);
    transform: translateY(-4px);
}

.why__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.why__card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.why__card-text {
    color: var(--color-text-light);
    line-height: 1.7;
}

.why__card-text code {
    background: var(--color-code-bg);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    color: var(--color-primary);
}

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

.how {
    background: var(--color-bg-alt);
}

.visual-placeholder {
    background: white;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    margin: var(--spacing-lg) 0;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-placeholder__content {
    max-width: 600px;
}

.visual-placeholder__icon {
    font-size: 4rem;
    display: block;
    margin-bottom: var(--spacing-md);
    opacity: 0.7;
}

.visual-placeholder__text {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.visual-placeholder__hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    opacity: 0.7;
    font-style: italic;
}

/* ===========================
   Example Section
   =========================== */

.example {
    margin-top: var(--spacing-xl);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.example__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.example__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.example__step {
    text-align: center;
    padding: var(--spacing-md);
}

.example__number {
    width: 3rem;
    height: 3rem;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin: 0 auto var(--spacing-sm);
}

.example__step p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.example__step code {
    background: var(--color-code-bg);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    color: var(--color-primary);
}

.example__step kbd {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    font-size: 0.875em;
    font-family: var(--font-base);
    color: var(--color-text-light);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 0 var(--color-border);
}

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

.download {
    background: var(--color-bg);
    text-align: center;
}

.download__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.download__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.download__subtitle a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s ease;
}

.download__subtitle a:hover {
    border-bottom-color: var(--color-primary);
}

.download__version {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-top: var(--spacing-md);
    font-weight: 600;
}

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

.link-button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.2s ease;
}

.link-button:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.1);
}

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

.footer {
    background: #fafafa;
    color: var(--color-text-light);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer__text {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.footer__text a {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.footer__text a:hover {
    border-bottom-color: var(--color-primary);
}

.footer__tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-lighter);
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.5rem;
        --font-size-xl: 1.25rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }

    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .hero__subtitle {
        font-size: var(--font-size-base);
    }

    .cta-button {
        padding: 0.875rem 2rem;
        font-size: var(--font-size-base);
    }

    .cta-button--large {
        padding: 1rem 2rem;
        font-size: var(--font-size-lg);
    }

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

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

    .visual-placeholder {
        min-height: 300px;
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .download__links {
        flex-direction: column;
        align-items: stretch;
    }

    .link-button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero__emoji {
        font-size: var(--font-size-3xl);
    }

    .why__icon {
        font-size: 2.5rem;
    }

    .visual-placeholder__icon {
        font-size: 3rem;
    }
}

/* ===========================
   Animations & Polish
   =========================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}



/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}