/**
 * MASTER DESIGN FRAMEWORK
 * Farmhouse Pet Supply - Premium CSS Architecture
 * ================================================
 */

/* ==========================================================================
   1. DESIGN TOKENS & VARIABLES
   ========================================================================== */

:root {
    /* Color Palette */
    --color-canvas: #FAF9F6;
    --color-charcoal: #2C2E30;
    --color-forest: #2D5530;
    --color-forest-dark: #1E3A21;
    --color-amber: #D4A373;
    --color-amber-light: #E8C9A8;
    --color-muted: #6B7280;
    --color-border: #E5E2DB;
    --color-white: #FFFFFF;

    /* Negative Space Rule */
    --padding-section: 10vh;
    --gutter-asymmetric: 60px;
    --gutter-mobile: 24px;

    /* Container Widths */
    --container-max: 1400px;
    --container-narrow: 900px;
    --container-text: 720px;

    /* Depth Architecture */
    --glass-blur: 20px;
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);

    /* Reveal Physics */
    --reveal-distance: 30px;
    --reveal-duration: 0.8s;
    --reveal-easing: cubic-bezier(0.16, 1, 0.3, 1);

    /* Typography Scale */
    --font-display: 'Lora', Georgia, serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

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

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

/* ==========================================================================
   2. FLUID TYPOGRAPHY SYSTEM
   Using clamp() for responsive scaling
   ========================================================================== */

h1, .h1 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.05;
    /* Scales from 3rem (48px) to 6rem (96px) */
    font-size: clamp(3rem, 2rem + 5vw, 6rem);
}

h2, .h2 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
    /* Scales from 2rem (32px) to 4rem (64px) */
    font-size: clamp(2rem, 1.5rem + 2.5vw, 4rem);
}

h3, .h3 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
    /* Scales from 1.5rem (24px) to 2.5rem (40px) */
    font-size: clamp(1.5rem, 1.25rem + 1.25vw, 2.5rem);
}

h4, .h4 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.2;
    /* Scales from 1.25rem (20px) to 1.75rem (28px) */
    font-size: clamp(1.25rem, 1.1rem + 0.75vw, 1.75rem);
}

h5, .h5 {
    font-family: var(--font-body);
    font-weight: 600;
    line-height: 1.3;
    font-size: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
}

h6, .h6 {
    font-family: var(--font-body);
    font-weight: 600;
    line-height: 1.4;
    font-size: 1rem;
}

/* Body Typography */
body {
    font-family: var(--font-body);
    font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    line-height: 1.8;
    color: var(--color-charcoal);
    background-color: var(--color-canvas);
}

.text-lead {
    font-size: clamp(1.125rem, 1rem + 0.5vw, 1.5rem);
    line-height: 1.7;
    color: var(--color-muted);
}

.text-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-forest);
}

/* ==========================================================================
   3. NEGATIVE SPACE RULE
   Global section padding and asymmetric gutters
   ========================================================================== */

.section-block {
    padding-top: var(--padding-section);
    padding-bottom: var(--padding-section);
}

.container-frame {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--gutter-mobile);
    padding-right: var(--gutter-mobile);
}

@media (min-width: 768px) {
    .container-frame {
        padding-left: var(--gutter-asymmetric);
        padding-right: var(--gutter-asymmetric);
    }
}

/* Asymmetric Grid Container */
.asymmetric-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gutter-mobile);
}

@media (min-width: 1024px) {
    .asymmetric-grid {
        gap: var(--gutter-asymmetric);
    }

    /* Image Left / Text Right Offset */
    .asymmetric-grid--image-left {
        grid-template-columns: 1.2fr 0.8fr;
    }

    /* Text Left / Image Right Offset */
    .asymmetric-grid--text-left {
        grid-template-columns: 0.8fr 1.2fr;
    }

    /* Centered with Side Gutters */
    .asymmetric-grid--centered {
        grid-template-columns: 1fr minmax(auto, 900px) 1fr;
    }

    .asymmetric-grid--centered > * {
        grid-column: 2;
    }
}

/* ==========================================================================
   4. DEPTH ARCHITECTURE
   Glass container and elevation system
   ========================================================================== */

.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
}

.glass-container--dark {
    background: rgba(44, 46, 48, 0.85);
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}

.glass-container--elevated {
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.05),
        0 40px 80px rgba(0, 0, 0, 0.03);
}

/* Elevation Layers */
.elevation-1 {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.elevation-2 {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.elevation-3 {
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.elevation-4 {
    box-shadow: var(--glass-shadow);
}

/* ==========================================================================
   5. REVEAL PHYSICS
   Intersection Observer animation system
   ========================================================================== */

/* Default state - visible (progressive enhancement) */
.reveal-element {
    opacity: 1;
    transform: translateY(0);
}

/* When JS is ready, hide elements for animation */
.reveal-ready .reveal-element {
    opacity: 0;
    transform: translateY(var(--reveal-distance));
    transition:
        opacity var(--reveal-duration) var(--reveal-easing),
        transform var(--reveal-duration) var(--reveal-easing);
}

/* Visible state after intersection */
.reveal-ready .reveal-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered delays */
.reveal-ready .reveal-element[data-delay="1"] { transition-delay: 0.1s; }
.reveal-ready .reveal-element[data-delay="2"] { transition-delay: 0.2s; }
.reveal-ready .reveal-element[data-delay="3"] { transition-delay: 0.3s; }
.reveal-ready .reveal-element[data-delay="4"] { transition-delay: 0.4s; }
.reveal-ready .reveal-element[data-delay="5"] { transition-delay: 0.5s; }

/* Direction variants */
.reveal-ready .reveal-element--left {
    transform: translateX(-30px);
}
.reveal-ready .reveal-element--left.visible {
    transform: translateX(0);
}

.reveal-ready .reveal-element--right {
    transform: translateX(30px);
}
.reveal-ready .reveal-element--right.visible {
    transform: translateX(0);
}

.reveal-ready .reveal-element--scale {
    transform: scale(0.95);
}
.reveal-ready .reveal-element--scale.visible {
    transform: scale(1);
}

/* ==========================================================================
   6. THE SCAFFOLDING
   Asymmetrical container structures
   ========================================================================== */

/* Container Type A: Image Left / Text Right Offset */
.scaffold-image-text {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gutter-mobile);
    align-items: center;
    min-height: 60vh;
}

@media (min-width: 1024px) {
    .scaffold-image-text {
        grid-template-columns: 1.3fr 0.7fr;
        gap: var(--gutter-asymmetric);
    }
}

.scaffold-image-text__media {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--color-border);
}

.scaffold-image-text__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scaffold-image-text__content {
    padding: var(--space-xl) 0;
}

@media (min-width: 1024px) {
    .scaffold-image-text__content {
        padding: var(--space-3xl);
    }
}

/* Container Type B: Centered Technical Spec Grid */
.scaffold-spec-grid {
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.scaffold-spec-grid__header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.scaffold-spec-grid__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

@media (min-width: 768px) {
    .scaffold-spec-grid__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.scaffold-spec-grid__cell {
    background: var(--color-canvas);
    padding: var(--space-xl);
    text-align: center;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.scaffold-spec-grid__cell--highlight {
    background: var(--color-forest);
    color: var(--color-white);
}

/* Container Type C: Full-Bleed Cinematic Background */
.scaffold-cinematic {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.scaffold-cinematic__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.scaffold-cinematic__bg img,
.scaffold-cinematic__bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scaffold-cinematic__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.3) 0%,
        rgba(0, 0, 0, 0.5) 100%
    );
}

.scaffold-cinematic__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: var(--space-xl);
    color: var(--color-white);
}

/* ==========================================================================
   7. UTILITY CLASSES
   ========================================================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }

.mt-0 { margin-top: 0; }
.mt-md { margin-top: var(--space-md); }
.mt-xl { margin-top: var(--space-xl); }

.mx-auto { margin-left: auto; margin-right: auto; }

.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.p-2xl { padding: var(--space-2xl); }

.bg-canvas { background-color: var(--color-canvas); }
.bg-charcoal { background-color: var(--color-charcoal); color: var(--color-white); }
.bg-forest { background-color: var(--color-forest); color: var(--color-white); }

.color-white { color: var(--color-white); }
.color-muted { color: var(--color-muted); }
.color-forest { color: var(--color-forest); }
.color-amber { color: var(--color-amber); }

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