/* ==========================================================================
   RevolutionaryMachinery.com — Industrial Design System
   Monochrome Base + Safety Accent (#ff6b00)
   ========================================================================== */

:root {
    --rm-bg-dark: hsl(0, 0%, 7%);
    --rm-bg-card: hsl(0, 0%, 10%);
    --rm-bg-subtle: hsl(0, 0%, 15%);
    --rm-border-color: hsl(0, 0%, 20%);
    --rm-border-light: hsl(0, 0%, 25%);
    
    --rm-text-primary: hsl(0, 0%, 90%);
    --rm-text-secondary: hsl(0, 0%, 60%);
    --rm-text-muted: hsl(0, 0%, 45%);

    --rm-accent: hsl(24, 100%, 50%);
    --rm-accent-hover: #e05e00;
    --rm-accent-light: rgba(255, 107, 0, 0.15);

    --rm-font-mono: 'Space Mono', SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
    --rm-font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    /* Spacing utilities for small text (removes need for inline styles) */
    --rm-text-xs: 0.7rem;
    --rm-text-sm: 0.8rem;
    --rm-spacing-xs: 0.3rem;
    --rm-spacing-sm: 0.6rem;
    
    /* Font sizes */
    --rm-font-size-xs: 0.625rem;
    --rm-font-size-sm: 0.75rem;
    
    /* Letter spacing */
    --rm-tracking-tight: -0.04em;
    --rm-tracking-wide: 0.1em;
    --rm-tracking-widest: 0.15em;
}

body {
    background-color: var(--rm-bg-dark);
    color: var(--rm-text-primary);
    font-family: var(--rm-font-sans);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Headings & Typography */
h1, h2, h3, h4, h5, h6, .navbar-brand {
    font-family: var(--rm-font-mono);
    font-weight: 700;
    letter-spacing: -0.04em;
    text-transform: uppercase;
    color: var(--rm-text-primary);
}

.mono-text {
    font-family: var(--rm-font-mono);
}

/* Layout structure */
html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
}

.rm-content {
    flex: 1 0 auto;
}

.rm-footer {
    flex-shrink: 0;
}

/* Navbar */
header {
    background-color: var(--rm-bg-dark);
    border-bottom: 1px solid var(--rm-border-color);
}

.rm-header {
    position: sticky;
    top: 0;
    background-color: var(--rm-bg-dark);
    border-bottom: 1px solid var(--rm-border-color);
    z-index: 1000;
    padding: 0;
    overflow: visible;
}

.rm-header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    height: 4rem;
    overflow: visible;
}

.rm-header-logo-section {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    height: 100%;
    overflow: visible;
}

.rm-header-brand {
    display: flex;
    align-items: center;
    height: 100%;
    overflow: visible;
    padding: 0;
}

.rm-header-logo {
    height: 70px;
    width: auto;
    display: block;
    pointer-events: none;
    filter: drop-shadow(0 0 20px rgba(0, 0, 0, 0.9));
    margin: 0;
    flex-shrink: 0;
}

.rm-header-divider {
    display: none;
    align-items: center;
    height: 24px;
    border-left: 1px solid var(--rm-border-color);
    margin: 0 1rem;
    padding: 0 1rem;
}

@media (min-width: 768px) {
    .rm-header-divider {
        display: flex;
    }
}

.rm-header-dcc-text {
    font-size: 0.75rem;
    font-family: var(--rm-font-mono);
    color: var(--rm-text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    white-space: nowrap;
}

.rm-header-dcc-link {
    color: var(--rm-accent);
    text-decoration: none;
    margin-left: 0.25rem;
    transition: color 0.2s ease;
}

.rm-header-dcc-link:hover {
    color: var(--rm-accent);
}

.rm-header-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.rm-header-nav-link {
    font-family: var(--rm-font-mono);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--rm-text-secondary);
    white-space: nowrap;
    transition: color 0.2s ease;
}

.rm-header-nav-link:hover {
    color: var(--rm-accent);
}

header .navbar-brand {
    display: flex;
    align-items: center;
    height: auto;
    overflow: visible;
}

header .navbar-brand img {
    height: 180px;
    width: auto;
    display: block;
    pointer-events: none;
    filter: drop-shadow(0 0 20px rgba(0, 0, 0, 0.9));
    margin: -4rem 0;
}

header .nav-link {
    font-family: var(--rm-font-mono);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--rm-text-secondary);
    white-space: nowrap;
    transition: color 0.2s ease;
}

header .nav-link:hover {
    color: var(--rm-accent);
}

.rm-navbar {
    background-color: transparent;
    border: none;
}

.rm-navbar .navbar-brand {
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #ffffff;
}

.rm-brand-accent {
    color: var(--rm-accent);
}

.rm-navbar .nav-link {
    color: var(--rm-text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease-in-out;
}

.rm-navbar .nav-link:hover, .rm-navbar .nav-link:focus {
    color: #ffffff;
}

/* Buttons */
.btn-primary {
    background-color: var(--rm-accent);
    border-color: var(--rm-accent);
    color: #ffffff;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    padding: 0.6rem 1.25rem;
    border-radius: 0;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.1s ease;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--rm-accent-hover);
    border-color: var(--rm-accent-hover);
    color: #ffffff;
}

.btn-outline-secondary {
    color: var(--rm-text-secondary);
    border-color: var(--rm-border-light);
    background-color: transparent;
    font-weight: 500;
    font-family: var(--rm-font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-radius: 0;
}

.btn-outline-secondary:hover {
    background-color: var(--rm-bg-subtle);
    color: #ffffff;
    border-color: var(--rm-text-secondary);
}

/* Product Cards */
.rm-card {
    background-color: var(--rm-bg-card);
    border: 1px solid var(--rm-border-color);
    border-radius: 0;
    transition: border-color 0.2s ease;
    overflow: hidden;
}

.rm-card:hover {
    border-color: var(--rm-accent);
}

.rm-card:hover .card-title {
    color: var(--rm-accent);
}

.rm-product-img-wrapper {
    position: relative;
    overflow: hidden;
    background-color: var(--rm-bg-card);
    aspect-ratio: 4 / 3;
}

.rm-badge-overlay {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    z-index: 10;
}

.rm-card-header {
    background-color: var(--rm-bg-subtle);
    border-bottom: 1px solid var(--rm-border-color);
    padding: 1rem 1.25rem;
}

.rm-badge-tier {
    font-size: 0.625rem;
    font-family: var(--rm-font-mono);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    padding: 0.25rem 0.5rem;
    border-radius: 0;
    background-color: var(--rm-bg-dark);
    color: var(--rm-text-primary);
    border: 1px solid var(--rm-border-color);
    font-weight: 400;
}

.rm-price {
    font-family: var(--rm-font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: #ffffff;
}

.rm-spec-list {
    font-size: 0.85rem;
    color: var(--rm-text-secondary);
}

.rm-spec-key {
    font-weight: 600;
    color: var(--rm-text-primary);
}

/* Footer & DCC Strip */
footer {
    margin-top: auto;
}

.rm-footer-sub {
    background-color: #0f1115;
    color: var(--rm-text-muted);
    font-size: 0.75rem;
    padding: 2rem 0;
}

.rm-footer-sub .text-center > div {
    color: var(--rm-text-secondary);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.rm-footer-copyright {
    color: var(--rm-text-muted);
    font-family: var(--rm-font-mono);
    font-size: 0.65rem;
    font-weight: 400;
    letter-spacing: 0.05em;
}

.rm-footer-logo {
    height: 50px;
    width: auto;
    display: block;
    filter: drop-shadow(0 0 10px rgba(255, 107, 0, 0.3));
}

.rm-footer-brand-accent {
    color: var(--rm-accent);
    font-family: var(--rm-font-mono);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.rm-footer-tagline {
    color: var(--rm-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.rm-dcc-strip {
    background-color: var(--rm-accent);
    border-top: none;
    border-bottom: 1px solid var(--rm-accent-hover);
    padding: 1.75rem 0;
}

.rm-dcc-cta {
    color: #0f1115;
    font-size: 0.9rem;
    font-weight: 700;
    font-family: var(--rm-font-mono);
    letter-spacing: 0.05em;
    text-decoration: none;
    transition: color 0.2s ease;
}

.rm-dcc-cta:hover {
    color: #1a1f27;
    text-decoration: underline;
}

/* Modals */
.modal-content {
    background-color: var(--rm-bg-card);
    border: 1px solid var(--rm-border-color);
    color: var(--rm-text-primary);
}

.modal-header {
    border-bottom: 1px solid var(--rm-border-color);
}

.modal-footer {
    border-top: 1px solid var(--rm-border-color);
}

.form-control, .form-select {
    background-color: var(--rm-bg-dark);
    border: 1px solid var(--rm-border-color);
    color: var(--rm-text-primary);
}

.form-control:focus, .form-select:focus {
    background-color: var(--rm-bg-dark);
    border-color: var(--rm-accent);
    color: var(--rm-text-primary);
    box-shadow: 0 0 0 0.25rem var(--rm-accent-light);
}

.form-check-input {
    background-color: var(--rm-bg-dark);
    border-color: var(--rm-border-color);
}

.form-check-input:checked {
    background-color: var(--rm-accent);
    border-color: var(--rm-accent);
}

/* Utility Classes */
/* Typography utilities for consistent sizing (CSS variables) */
.text-xs {
    font-size: var(--rm-text-xs);
}

.text-sm {
    font-size: var(--rm-text-sm);
}

/* Common text label styling used in card metadata */
.rm-label {
    font-size: var(--rm-text-xs);
    font-weight: 700;
    text-transform: uppercase;
    color: var(--rm-text-muted);
    font-family: var(--rm-font-mono);
    letter-spacing: 0.15em;
    margin-bottom: var(--rm-spacing-sm);
}

/* Specs button in product card footer */
.rm-specs-btn {
    font-family: var(--rm-font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    padding: 0.35rem 0.75rem;
    border-radius: 0;
    border-color: var(--rm-border-color);
}

.rm-specs-btn:hover {
    border-color: var(--rm-accent);
    color: var(--rm-accent);
}

/* Letter spacing utilities */
.tracking-tight {
    letter-spacing: var(--rm-tracking-tight);
}

.tracking-wide {
    letter-spacing: var(--rm-tracking-wide);
}

.tracking-widest {
    letter-spacing: var(--rm-tracking-widest);
}

/* Text transform utilities */
.uppercase {
    text-transform: uppercase;
}

/* Filter utilities */
.grayscale {
    filter: grayscale(1);
}