/**
 * Drive - Main Stylesheet
 * Mobile-first architecture, clean responsive primitives, accessibility-ready
 */

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

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

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    font-weight: var(--font-weight-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
}

.site-main {
    flex: 1 0 auto;
    width: 100%;
}

/* ==========================================================================
   2. Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    color: var(--color-primary);
    line-height: var(--line-height-tight);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-md); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-md);
}

p:last-child {
    margin-bottom: 0;
}

a {
    color: var(--color-secondary-dark);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

a:hover,
a:focus-visible {
    color: var(--color-accent);
}

ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

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

/* ==========================================================================
   3. Accessibility & Focus States
   ========================================================================== */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute !important;
    width: 1px;
    word-wrap: normal !important;
}

.skip-link {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    font-weight: var(--font-weight-semibold);
    padding: var(--spacing-sm) var(--spacing-md);
    position: absolute;
    top: -999px;
    left: var(--spacing-md);
    z-index: 99999;
    text-decoration: none;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
}

.skip-link:focus {
    top: var(--spacing-md);
    outline: 3px solid var(--color-secondary);
}

:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* ==========================================================================
   4. Layout Containers & Grid Primitives
   ========================================================================== */
.site-container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.page-layout-container {
    padding-top: var(--spacing-2xl);
    padding-bottom: var(--spacing-3xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.content-area {
    width: 100%;
}

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

/* ==========================================================================
   5. Button Primitives
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1.25;
    text-decoration: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 1px solid transparent;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
    background-color: var(--color-primary-light);
    color: var(--color-text-inverse);
}

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

.btn-secondary:hover,
.btn-secondary:focus-visible {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-accent {
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
}

.btn-accent:hover,
.btn-accent:focus-visible {
    background-color: var(--color-accent-hover);
    color: var(--color-text-inverse);
}

/* ==========================================================================
   6. Global Footer Foundations
   (Header component CSS is modularly managed in assets/css/components/header.css)
   ========================================================================== */
.site-footer {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: auto;
}

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

.footer-menu-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md) var(--spacing-lg);
}

.footer-menu-list a {
    color: var(--color-text-inverse);
    text-decoration: none;
}

.footer-info {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.site-disclaimer {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================================================
   7. Homepage Section Foundations
   ========================================================================== */
.homepage-section {
    padding: var(--spacing-3xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.homepage-section:nth-child(even) {
    background-color: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    max-width: var(--container-narrow-width);
    margin: 0 auto var(--spacing-2xl);
}

.section-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.section-description {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
}

/* Hero */
.homepage-hero {
    background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
    padding: var(--spacing-4xl) 0;
    text-align: center;
}

.homepage-hero .hero-content {
    max-width: var(--container-narrow-width);
    margin: 0 auto;
}

.homepage-hero .section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
}

/* State Selector Map Box */
.state-selector-placeholder,
.youtube-placeholder-box,
.testimonials-placeholder-box {
    background-color: var(--color-bg-muted);
    border: 2px dashed var(--color-border-dark);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3xl) var(--spacing-md);
    text-align: center;
}

.placeholder-note {
    color: var(--color-text-muted);
    font-weight: var(--font-weight-medium);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.feature-title {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.feature-text {
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* How It Works Steps */
.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.step-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    position: relative;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
}

.step-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.step-text {
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* FAQ */
.faq-accordion-placeholder {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: var(--container-narrow-width);
    margin: 0 auto;
}

.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.faq-question {
    font-size: var(--font-size-md);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.faq-answer p {
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* Final CTA */
.homepage-final-cta {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    text-align: center;
}

.homepage-final-cta .section-title {
    color: var(--color-text-inverse);
}

.homepage-final-cta .section-description {
    color: var(--color-text-light);
    max-width: var(--container-narrow-width);
    margin: 0 auto var(--spacing-xl);
}

.cta-actions {
    display: flex;
    justify-content: center;
}

/* ==========================================================================
   8. Breadcrumbs
   ========================================================================== */
.site-breadcrumbs-wrapper {
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-xs) 0;
    margin-bottom: var(--spacing-lg);
}

.drive-breadcrumbs .breadcrumb-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.drive-breadcrumbs .breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    margin-right: var(--spacing-xs);
    color: var(--color-text-light);
}

.drive-breadcrumbs .breadcrumb-item.is-active {
    color: var(--color-text-muted);
}

/* ==========================================================================
   9. Media Queries (Responsive Primitives)
   ========================================================================== */

/* Tablet & Up (>= 768px) */
@media (min-width: 768px) {
    .homepage-hero .section-title {
        font-size: var(--font-size-4xl);
    }

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

    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

/* Desktop & Up (>= 1024px) */
@media (min-width: 1024px) {
    .page-layout-container {
        flex-direction: row;
    }

    .content-area {
        flex: 1;
    }

    .sidebar-widget-area {
        width: 300px;
        flex-shrink: 0;
    }

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