/* ========================================
   Sierra Madre Emergency Sleeping Bag Presell
   Curiosity-Driven Advertorial | v5.1
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

/* Design Tokens */
:root {
    /* Brand Colors */
    --color-primary: #59FFD9;
    --color-secondary: #13475A;
    --color-background: #FFFFFF;
    --color-surface: #F5F5F5;
    --color-text-primary: #282828;
    --color-text-secondary: #4A4A4A;
    --color-text-muted: #6B6B6B;
    --color-text-inverse: #FFFFFF;
    --color-cta-bg: #59FFD9;
    --color-cta-text: #13475A;
    --color-cta-hover: #4DE5C5;
    --color-accent: #F6A429;
    --color-success: #2E9E7B;
    --color-warning: #F6A429;
    --color-error: #DE2A2A;

    /* Typography */
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --font-size-h1: clamp(36px, 5vw, 56px);
    --font-size-h2: clamp(30px, 4vw, 48px);
    --font-size-h3: clamp(24px, 3vw, 36px);
    --font-size-h4: clamp(20px, 2.5vw, 30px);
    --font-size-h5: clamp(18px, 2vw, 24px);
    --font-size-body: 18px;
    --font-size-small: 14px;

    --font-weight-normal: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.2;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.8;

    /* Spacing */
    --spacing-section: 64px;
    --spacing-component: 32px;
    --spacing-element: 16px;

    /* Border Radius */
    --radius-small: 4px;
    --radius-medium: 8px;
    --radius-large: 16px;
    --radius-pill: 50px;

    /* Shadows */
    --shadow-small: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-medium: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-large: 0 8px 24px rgba(0,0,0,0.12);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Layout */
    --max-width: 1600px;
    --content-width: 800px;
    --container-padding: 24px;

    /* Focus Ring */
    --focus-ring-color: var(--color-primary);
    --focus-ring-width: 2px;
    --focus-ring-offset: 2px;
}

/* Typography */
body {
    font-family: var(--font-body);
    font-size: var(--font-size-body);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background: var(--color-background);
    font-weight: var(--font-weight-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-element);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }
h5 { font-size: var(--font-size-h5); }

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

a {
    color: var(--color-secondary);
    transition: color var(--transition-base);
}

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

strong {
    font-weight: var(--font-weight-bold);
}

em {
    font-style: italic;
}

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

.container--narrow {
    max-width: var(--content-width);
}

/* Sections */
.content-section {
    padding: var(--spacing-section) 0;
}

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

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-component);
}

.section-intro {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 20px;
    margin-bottom: var(--spacing-component);
}

/* Hero Section */
.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-section) var(--container-padding);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
}

.hero--with-image {
    min-height: 80vh;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero--centered {
    flex-direction: column;
}

.hero__container {
    max-width: 900px;
    z-index: 1;
}

.hero__headline {
    font-size: var(--font-size-h1);
    margin-bottom: var(--spacing-element);
    color: var(--color-secondary);
}

.hero__subheadline {
    font-size: var(--font-size-h4);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-component);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
}

.hero__byline {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-component);
    font-weight: var(--font-weight-normal);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 16px 32px;
    font-family: var(--font-heading);
    font-weight: var(--font-weight-semibold);
    font-size: 18px;
    text-decoration: none;
    border-radius: var(--radius-medium);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
    min-width: 200px;
}

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

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

.btn--large {
    padding: 20px 48px;
    font-size: 20px;
    min-width: 250px;
}

.btn:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

/* Trust Bar */
.trust-bar {
    background: var(--color-background);
    padding: var(--spacing-component) 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.trust-badges {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-element);
    max-width: var(--max-width);
    margin: 0 auto;
}

.trust-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background: rgba(89, 255, 217, 0.1);
    border-radius: var(--radius-small);
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
}

.trust-badge__icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

/* Author Bio */
.author-bio {
    padding: var(--spacing-component) 0;
    background: var(--color-surface);
    text-align: center;
}

.author-bio__name {
    font-size: var(--font-size-h5);
    margin-bottom: 4px;
}

.author-bio__credentials {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-element);
}

.author-bio__bio {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    max-width: 700px;
    margin: 0 auto;
}

/* Rich Text */
.rich-text p,
.rich-text ul,
.rich-text ol {
    margin-bottom: var(--spacing-element);
}

.rich-text ul,
.rich-text ol {
    padding-left: 24px;
}

.rich-text li {
    margin-bottom: 8px;
}

.rich-text h3 {
    margin-top: var(--spacing-component);
    margin-bottom: var(--spacing-element);
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding-left: 28px;
    position: relative;
    margin-bottom: 12px;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: var(--font-weight-bold);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-element);
    margin: var(--spacing-component) 0;
}

.stat-card {
    background: var(--color-background);
    padding: var(--spacing-component);
    border-radius: var(--radius-large);
    text-align: center;
    box-shadow: var(--shadow-medium);
    border: 2px solid var(--color-primary);
}

.stat-card__number {
    font-size: 48px;
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
    margin-bottom: 8px;
    font-family: var(--font-heading);
}

.stat-card__label {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
}

/* Product Card */
.product-card {
    display: block;
    margin: var(--spacing-component) 0;
    border-radius: var(--radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.product-card__image {
    width: 100%;
    height: auto;
    display: block;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-component);
    margin: var(--spacing-component) 0;
}

.feature-box {
    background: var(--color-background);
    padding: var(--spacing-component);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-small);
    border-left: 4px solid var(--color-primary);
}

.feature-box h4 {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-element);
}

.feature-box p {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* Testimonials */
.testimonials-section {
    background: var(--color-background);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-component);
    margin: var(--spacing-component) 0;
}

.testimonial-card {
    background: var(--color-surface);
    padding: var(--spacing-component);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-small);
    text-decoration: none;
    color: inherit;
    display: block;
    transition: all var(--transition-base);
}

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

.testimonial-card__rating {
    margin-bottom: var(--spacing-element);
    color: var(--color-accent);
    font-size: 20px;
}

.testimonial-card__rating .star {
    display: inline-block;
    margin-right: 2px;
}

.testimonial-card__quote {
    font-size: 16px;
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-element);
    font-style: italic;
    border: none;
    padding: 0;
}

.testimonial-card__author {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.testimonials-closing {
    margin-top: var(--spacing-component);
    text-align: center;
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    font-style: italic;
}

/* FAQ Cards */
.faq-cards {
    display: grid;
    gap: var(--spacing-element);
    margin: var(--spacing-component) 0;
}

.faq-card {
    background: var(--color-background);
    padding: var(--spacing-component);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-small);
    border-left: 4px solid var(--color-primary);
}

.faq-card__question {
    font-size: var(--font-size-h5);
    color: var(--color-secondary);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-element);
}

.faq-card__answer {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: 0;
}

/* FAQ Accordion */
.faq-accordion {
    display: grid;
    gap: var(--spacing-element);
    margin: var(--spacing-component) 0;
}

.faq-accordion__item {
    background: var(--color-background);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-small);
    overflow: hidden;
}

.faq-accordion__question {
    padding: var(--spacing-element);
    font-size: 18px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
    cursor: pointer;
    list-style: none;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-accordion__question::-webkit-details-marker {
    display: none;
}

.faq-accordion__question::after {
    content: "+";
    font-size: 24px;
    color: var(--color-primary);
    transition: transform var(--transition-base);
}

.faq-accordion__item[open] .faq-accordion__question::after {
    transform: rotate(45deg);
}

.faq-accordion__answer {
    padding: 0 var(--spacing-element) var(--spacing-element);
}

.faq-accordion__answer p {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: 0;
}

/* Guarantee Box */
.guarantee-section {
    padding: var(--spacing-section) 0;
    background: linear-gradient(135deg, rgba(89, 255, 217, 0.1) 0%, rgba(19, 71, 90, 0.05) 100%);
}

.guarantee-box {
    background: var(--color-background);
    padding: var(--spacing-section) var(--spacing-component);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-large);
    text-align: center;
    border: 3px solid var(--color-primary);
}

.guarantee-box__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-component);
    color: var(--color-primary);
}

.guarantee-box__icon svg {
    width: 100%;
    height: 100%;
}

.guarantee-box__headline {
    font-size: var(--font-size-h2);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-element);
}

.guarantee-box__intro {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-component);
}

.guarantee-box__list {
    text-align: left;
    max-width: 700px;
    margin: 0 auto var(--spacing-component);
    list-style: none;
    padding: 0;
}

.guarantee-box__list li {
    margin-bottom: var(--spacing-element);
    padding-left: 32px;
    position: relative;
    font-size: 16px;
    line-height: var(--line-height-relaxed);
}

.guarantee-box__list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-size: 24px;
    font-weight: var(--font-weight-bold);
}

.guarantee-box__closing {
    font-size: 18px;
    color: var(--color-text-secondary);
    font-style: italic;
    margin-bottom: 0;
}

/* Value Stack */
.value-stack {
    background: var(--color-surface);
    padding: var(--spacing-component);
    border-radius: var(--radius-large);
    margin: var(--spacing-component) 0;
    box-shadow: var(--shadow-medium);
}

.value-stack__title {
    text-align: center;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-component);
}

.value-stack__items {
    display: grid;
    gap: 12px;
}

.value-stack__item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--color-background);
    border-radius: var(--radius-small);
}

.value-stack__item--feature {
    background: transparent;
    border-left: 3px solid var(--color-primary);
    padding-left: 16px;
}

.value-stack__item-name {
    font-weight: var(--font-weight-semibold);
}

.value-stack__item-value {
    color: var(--color-text-muted);
    font-size: var(--font-size-small);
}

.value-stack__total {
    margin-top: var(--spacing-component);
    padding-top: var(--spacing-component);
    border-top: 2px solid var(--color-primary);
}

.value-stack__total-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.value-stack__total-regular {
    text-decoration: line-through;
    color: var(--color-text-muted);
}

.value-stack__total-line--final {
    font-size: 24px;
    margin-top: var(--spacing-element);
}

.value-stack__total-price {
    font-size: 32px;
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
}

.text-muted {
    color: var(--color-text-muted);
    font-size: var(--font-size-small);
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-section) 0;
    text-align: center;
}

.cta-section--gradient {
    background: linear-gradient(135deg, rgba(89, 255, 217, 0.2) 0%, rgba(19, 71, 90, 0.1) 100%);
}

.cta-section__headline {
    font-size: var(--font-size-h2);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-element);
}

.cta-section__subheadline {
    font-size: var(--font-size-h4);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-component);
    font-weight: var(--font-weight-normal);
}

.cta-section__body {
    max-width: 700px;
    margin: 0 auto var(--spacing-component);
    text-align: left;
}

.cta-section__supporting {
    margin-top: var(--spacing-component);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-component);
    font-size: 14px;
    color: var(--color-text-secondary);
}

.cta-section__urgency {
    margin-top: var(--spacing-element);
    font-size: 16px;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Sticky CTA */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-background);
    box-shadow: 0 -4px 12px rgba(0,0,0,0.15);
    padding: 16px var(--container-padding);
    z-index: 1000;
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.sticky-cta.visible {
    transform: translateY(0);
}

.sticky-cta__container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-element);
}

.sticky-cta__content {
    display: flex;
    flex-direction: column;
}

.sticky-cta__text {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    font-size: 18px;
}

.sticky-cta__subtext {
    font-size: 14px;
    color: var(--color-text-muted);
}

.sticky-cta .btn {
    min-width: 200px;
}

/* Scroll Reveal */
[data-scroll-reveal] {
    opacity: 0;
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-scroll-reveal].revealed {
    opacity: 1;
}

[data-scroll-reveal="fade-up"] {
    transform: translateY(30px);
}

[data-scroll-reveal="fade-up"].revealed {
    transform: translateY(0);
}

[data-scroll-reveal="slide-up"] {
    transform: translateY(50px);
}

[data-scroll-reveal="slide-up"].revealed {
    transform: translateY(0);
}

[data-scroll-reveal="scale-up"] {
    transform: scale(0.95);
}

[data-scroll-reveal="scale-up"].revealed {
    transform: scale(1);
}

[data-scroll-reveal="stagger"] {
    transition-delay: calc(var(--stagger-index, 0) * 0.1s);
}

/* Accessibility */
.btn:focus-visible,
a:focus-visible,
details:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

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

    html {
        scroll-behavior: auto;
    }

    [data-scroll-reveal] {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* Mobile Responsive */
@media (max-width: 740px) {
    :root {
        --font-size-body: 16px;
        --spacing-section: 48px;
        --spacing-component: 24px;
        --spacing-element: 12px;
        --container-padding: 20px;
    }

    .hero {
        min-height: 60vh;
        padding: var(--spacing-component) var(--container-padding);
    }

    .hero__headline {
        font-size: 32px;
    }

    .hero__subheadline {
        font-size: 20px;
    }

    .trust-badges {
        grid-template-columns: 1fr 1fr;
    }

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

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

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

    .btn {
        padding: 14px 24px;
        font-size: 16px;
        min-width: 160px;
        width: 100%;
        max-width: 100%;
    }

    .btn--large {
        padding: 18px 32px;
        font-size: 18px;
    }

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

    .sticky-cta .btn {
        width: 100%;
    }

    .cta-section__supporting {
        flex-direction: column;
        gap: 8px;
    }

    .value-stack__total-line--final {
        font-size: 20px;
    }

    .value-stack__total-price {
        font-size: 28px;
    }
}

/* Touch Targets */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .faq-accordion__question,
    a {
        min-height: 44px;
        min-width: 44px;
    }
}

/* Print Styles */
@media print {
    .sticky-cta,
    .cta-section {
        display: none;
    }
}