/* ==========================================================================
   Ringford V3 Stylesheet - Swiss Industrial Theme
   ========================================================================== */

/* 1. Design Tokens (Variables) */
:root {
    --bg-base: #FAF9F5;         /* Warm Alabaster */
    --bg-surface: #FFFFFF;      /* Card / Header surface */
    --bg-alt: #F3F4F6;          /* Technical Cool Grey */
    
    --border-color: #E5E7EB;    /* Gridlines */
    --border-dark: #111827;     /* Technical black */
    
    --text-primary: #111827;    /* Carbon black */
    --text-secondary: #4B5563;  /* Slate grey */
    --text-muted: #9CA3AF;      /* Light grey */
    
    --accent-emerald: #059669;  /* Quality Green */
    --accent-dark: #064e3b;     /* Deep forest */
    --accent-hover: #10B981;    /* Mint Green */

    /* Logo Specific */
    --logo-text-primary: #111827;
    --logo-text-secondary: #4B5563;
    --logo-text-accent: #064e3b;
    --logo-emblem: #059669;
    
    --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'Space Mono', monospace;
    
    --transition-fast: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Mode Variables Override */
body.dark-mode {
    --bg-base: #0B0F19;         /* Dark Carbon Base */
    --bg-surface: #111827;      /* Dark Surface */
    --bg-alt: #1F2937;          /* Darker Slate Section */
    
    --border-color: #1F2937;    /* Gridlines in dark */
    --border-dark: #F9FAFB;     /* Technical white border */
    
    --text-primary: #F9FAFB;    /* White text */
    --text-secondary: #9CA3AF;  /* Gray text */
    --text-muted: #6B7280;      /* Darker gray text */
    
    --accent-emerald: #10B981;  /* Bright Mint for dark mode */
    --accent-dark: #059669;     /* Emerald Green */
    --accent-hover: #34D399;    /* Brightest Mint */

    --logo-text-primary: #ffffff;
    --logo-text-secondary: #9CA3AF;
    --logo-text-accent: #10B981;
    --logo-emblem: #10B981;
}

/* 2. Document Base Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

p {
    color: var(--text-secondary);
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 40px;
}

.mono-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-emerald);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    display: inline-block;
    margin-bottom: 12px;
}

/* 3. Navigation Header */
header.nav-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    background-color: rgba(250, 249, 245, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

/* Buttons */
.btn-outline {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 10px 20px;
    border: 1.5px solid var(--border-dark);
    background: transparent;
    cursor: pointer;
    text-transform: uppercase;
    transition: var(--transition-fast);
}

.btn-outline:hover {
    background-color: var(--border-dark);
    color: var(--bg-surface);
}

/* Theme Toggle Button */
.theme-toggle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    text-transform: uppercase;
    transition: var(--transition-fast);
    border-radius: 4px;
}

.theme-toggle:hover {
    border-color: var(--border-dark);
}

body.dark-mode header.nav-header {
    background-color: rgba(11, 15, 25, 0.85);
}

.btn-solid {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 12px 24px;
    border: none;
    background-color: var(--accent-emerald);
    color: #ffffff;
    cursor: pointer;
    text-transform: uppercase;
    transition: var(--transition-fast);
}

.btn-solid:hover {
    background-color: var(--accent-dark);
}

/* 4. Sections Layout */
section {
    padding: 100px 0;
    border-bottom: 1px solid var(--border-color);
}

/* Hero Section */
.hero-section {
    padding-top: 180px;
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 24px;
}

.hero-text p {
    font-size: 1.15rem;
    margin-bottom: 35px;
    max-width: 600px;
}

.hero-visual {
    position: relative;
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    border-radius: 12px;
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Technical gridlines in background of visual */
.hero-visual::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.5;
    z-index: 1;
}

.hero-visual svg {
    z-index: 2;
}

/* Products Section (Border Grid) */
.section-header {
    margin-bottom: 60px;
    max-width: 600px;
}

.section-header h2 {
    font-size: 2.25rem;
    margin-top: 8px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    border-top: 1px solid var(--border-dark);
    border-left: 1px solid var(--border-dark);
}

.product-card {
    border-right: 1px solid var(--border-dark);
    border-bottom: 1px solid var(--border-dark);
    padding: 50px;
    background-color: var(--bg-surface);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}

.product-card h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
}

.product-card p {
    margin-bottom: 30px;
    font-size: 0.95rem;
}

.product-specs {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    background-color: var(--bg-base);
    padding: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.product-specs li {
    list-style: none;
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
}

/* Services / Capabilities Section */
.services-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.service-item {
    border-left: 3px solid var(--accent-emerald);
    padding-left: 24px;
}

.service-item h4 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
}

/* Contact Section (Say Hello) */
.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    border: 1.5px solid var(--border-color);
    background-color: var(--bg-surface);
    padding: 12px 16px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--border-dark);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.contact-info {
    border-left: 1px solid var(--border-color);
    padding-left: 60px;
}

.info-item {
    margin-bottom: 30px;
}

.info-item h4 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.info-item p {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* 5. Footer Copyright */
footer.v3-footer {
    background-color: var(--border-dark);
    color: #ffffff;
    padding: 40px 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    opacity: 0.8;
}

.footer-copy {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Responsive Breakpoints */
@media (max-width: 968px) {
    .hero-grid,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .product-grid,
    .services-list {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        border-left: none;
        padding-left: 0;
        margin-top: 20px;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .footer-inner {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}