/*
================================================================================
PAPER TRAIL LIMITED - MAIN STYLESHEET
================================================================================
File: css/main.css
Purpose: Global styles for the Paper Trail Limited website
Domain: typewrite.club

TABLE OF CONTENTS:
1. CSS CUSTOM PROPERTIES (Variables) - Colors, fonts, spacing
2. BASE STYLES & RESET - Normalize, typography defaults
3. UTILITY CLASSES - Container, helpers
4. BUTTONS - Primary, secondary, variants
5. SITE HEADER & NAVIGATION - Fixed header, mobile menu
6. HERO SECTION - Homepage hero with typewriter
7. SECTIONS - General section styles
8. ABOUT SECTION - Company info cards
9. APPS PORTFOLIO - App showcase cards
10. DOMAINS SECTION - Domain info display
11. FOOTER - Site-wide footer
12. ACCESSIBILITY - Reduced motion, focus styles
13. PRINT STYLES - Print-friendly styles

DESIGN SYSTEM:
- Primary Colors: Deep navy (#1a1a2e), Warm cream (#f5f5dc)
- Accent: Vintage red (#c41e3a), Gold (#d4af37)
- Typography: System fonts + Georgia for headings (typewriter feel)
- Spacing: 8px base grid, responsive breakpoints at 768px and 1024px

BROWSER SUPPORT:
- Modern browsers (Chrome, Firefox, Safari, Edge)
- CSS Grid and Flexbox used extensively
- Progressive enhancement approach
================================================================================
*/

/* ============================================================================
   SECTION 1: CSS CUSTOM PROPERTIES (Variables)
   ============================================================================
   These variables define the design system and can be overridden for theming.
   All other styles reference these variables.
   
   TO MODIFY THE THEME:
   Change these variable values - all components will update automatically.
   ============================================================================ */
:root {
    /* BRAND COLORS
       Primary: Deep navy - used for headers, primary text
       Secondary: Warm cream - used for backgrounds
       Accent: Vintage red - used for CTAs, highlights, links
       Gold: Accent highlights, premium feel */
    --color-primary: #1a1a2e;        /* Deep navy - main brand color */
    --color-primary-light: #16213e;  /* Slightly lighter navy for gradients */
    --color-secondary: #f5f5dc;      /* Warm cream - page backgrounds */
    --color-accent: #c41e3a;         /* Vintage red - CTAs, highlights */
    --color-accent-hover: #9a1830;   /* Darker red for hover states */
    --color-gold: #d4af37;           /* Gold accents */
    --color-gold-light: #f4d03f;     /* Lighter gold for highlights */
    
    /* NEUTRAL COLORS
       Grayscale palette for text, borders, backgrounds */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-100: #f7f7f7;       /* Lightest gray - subtle backgrounds */
    --color-gray-200: #e5e5e5;       /* Light gray - borders */
    --color-gray-300: #d4d4d4;       /* Medium-light gray */
    --color-gray-400: #a3a3a3;       /* Medium gray - secondary text */
    --color-gray-500: #737373;       /* Darker gray */
    --color-gray-600: #525252;       /* Dark gray - body text */
    --color-gray-700: #404040;       /* Darker text */
    --color-gray-800: #262626;       /* Near black - headings */
    --color-gray-900: #171717;       /* Almost black */
    
    /* TYPOGRAPHY
       Headings: Georgia (classic typewriter feel)
       Body: System fonts (fast, native feel) */
    --font-heading: Georgia, 'Times New Roman', serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'Courier New', Consolas, Monaco, monospace;
    
    /* FONT SIZES
       Using rem for accessibility (scales with user preferences) */
    --text-xs: 0.75rem;      /* 12px - captions, small text */
    --text-sm: 0.875rem;     /* 14px - secondary text */
    --text-base: 1rem;       /* 16px - body text (default) */
    --text-lg: 1.125rem;     /* 18px - lead paragraphs */
    --text-xl: 1.25rem;      /* 20px - small headings */
    --text-2xl: 1.5rem;      /* 24px - h4 */
    --text-3xl: 1.875rem;    /* 30px - h3 */
    --text-4xl: 2.25rem;     /* 36px - h2 */
    --text-5xl: 3rem;        /* 48px - h1 (mobile) */
    --text-6xl: 3.75rem;     /* 60px - h1 (tablet) */
    --text-7xl: 4.5rem;      /* 72px - h1 (desktop) */
    
    /* SPACING SCALE (8px base grid)
       All spacing uses these variables for consistency */
    --space-1: 0.25rem;      /* 4px */
    --space-2: 0.5rem;       /* 8px - base unit */
    --space-3: 0.75rem;      /* 12px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.25rem;      /* 20px */
    --space-6: 1.5rem;       /* 24px */
    --space-8: 2rem;         /* 32px */
    --space-10: 2.5rem;      /* 40px */
    --space-12: 3rem;        /* 48px */
    --space-16: 4rem;        /* 64px */
    --space-20: 5rem;        /* 80px */
    --space-24: 6rem;        /* 96px */
    
    /* LAYOUT */
    --container-max: 1200px;           /* Maximum content width */
    --container-padding: var(--space-4); /* Mobile padding */
    --header-height: 70px;             /* Fixed header height */
    
    /* TRANSITIONS
       Consistent timing for hover effects, etc. */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* SHADOWS
       Subtle shadows for depth */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* BORDER RADIUS
       Consistent rounding */
    --radius-sm: 0.25rem;    /* 4px - small elements */
    --radius-md: 0.5rem;     /* 8px - buttons, inputs */
    --radius-lg: 0.75rem;    /* 12px - cards */
    --radius-xl: 1rem;       /* 16px - large cards */
    --radius-full: 9999px;   /* Pills, circles */
}

/* ============================================================================
   SECTION 2: BASE STYLES & RESET
   ============================================================================
   Reset browser defaults and establish base styles
   ============================================================================ */

/* Box sizing: border-box for all elements
   Makes width/height calculations intuitive */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* Remove default margins and padding
   We add these back intentionally where needed */
* {
    margin: 0;
    padding: 0;
}

/* Smooth scrolling for anchor links
   Respects user preferences (see accessibility section) */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Base body styles
   Sets up the main document styling */
body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-secondary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography defaults
   Headings use serif font for classic/typewriter feel */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

/* Heading size scale */
h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

/* Responsive heading sizes
   Larger on bigger screens */
@media (min-width: 768px) {
    h1 { font-size: var(--text-5xl); }
    h2 { font-size: var(--text-4xl); }
    h3 { font-size: var(--text-3xl); }
}

@media (min-width: 1024px) {
    h1 { font-size: var(--text-6xl); }
}

/* Paragraph and list spacing */
p {
    margin-bottom: var(--space-4);
}

ul, ol {
    margin-bottom: var(--space-4);
    padding-left: var(--space-6);
}

li {
    margin-bottom: var(--space-2);
}

/* Link styles
   Default links use accent color */
a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover,
a:focus {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

/* Focus styles for accessibility
   Visible focus indicator for keyboard navigation */
:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* Image defaults
   Prevent images from overflowing containers */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ============================================================================
   SECTION 3: UTILITY CLASSES
   ============================================================================
   Reusable helper classes
   ============================================================================ */

/* Container - centers content and limits max-width
   Usage: <div class="container">...</div> */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-8);
    }
}

/* ============================================================================
   SECTION 4: BUTTONS
   ============================================================================
   Button component with variants
   Usage: <a href="..." class="btn btn-primary">Text</a>
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    gap: var(--space-2);
}

.btn:hover,
.btn:focus {
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

/* Primary button - main CTAs
   Usage: <button class="btn btn-primary">Action</button> */
.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

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

/* Secondary button - alternative actions
   Usage: <button class="btn btn-secondary">Cancel</button> */
.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

/* Full-width button */
.btn-full {
    width: 100%;
}

/* ============================================================================
   SECTION 5: SITE HEADER & NAVIGATION
   ============================================================================
   Fixed header with logo and navigation
   Mobile-responsive with hamburger menu
   ============================================================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Brand / Logo */
.brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    color: var(--color-white);
}

.brand:hover,
.brand:focus {
    color: var(--color-gold);
    text-decoration: none;
}

.brand-icon {
    font-size: var(--text-2xl);
}

.brand-text {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Navigation Links */
.nav-links {
    display: none; /* Hidden by default on mobile */
    list-style: none;
    gap: var(--space-6);
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

.nav-link {
    color: var(--color-white);
    font-weight: 500;
    padding: var(--space-2) 0;
    position: relative;
    text-decoration: none;
}

/* Animated underline on hover */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-gold);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link:focus,
.nav-link.active {
    color: var(--color-gold);
    text-decoration: none;
}

.nav-link:hover::after,
.nav-link:focus::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Menu Toggle
   Hidden on desktop, shown on mobile */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

@media (min-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.hamburger {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-white);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* Mobile menu open state (X shape) */
.mobile-menu-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ============================================================================
   SECTION 6: HERO SECTION
   ============================================================================
   Homepage hero with typewriter imagery
   Full viewport height with centered content
   ============================================================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: var(--header-height);
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Dark overlay for text readability */
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(26, 26, 46, 0.85) 0%,
        rgba(26, 26, 46, 0.7) 50%,
        rgba(26, 26, 46, 0.85) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--space-8);
    max-width: 800px;
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--space-6);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.title-line {
    display: block;
}

/* Subtitle styling */
.title-line-sub {
    font-size: 0.6em;
    font-weight: 400;
    color: var(--color-gold);
    letter-spacing: 0.3em;
    text-transform: uppercase;
}

.hero-tagline {
    font-size: var(--text-xl);
    color: var(--color-secondary);
    margin-bottom: var(--space-4);
    font-style: italic;
}

.hero-location {
    font-size: var(--text-lg);
    color: var(--color-gray-300);
    margin-bottom: var(--space-8);
}

.location-icon {
    font-size: 1.2em;
    margin-right: var(--space-2);
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    align-items: center;
}

@media (min-width: 768px) {
    .hero-cta {
        flex-direction: row;
        justify-content: center;
    }
}

/* ============================================================================
   SECTION 7: SECTIONS - General Styles
   ============================================================================
   Standard section padding and title styles
   ============================================================================ */

section {
    padding: var(--space-16) 0;
}

@media (min-width: 768px) {
    section {
        padding: var(--space-20) 0;
    }
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-4);
}

.section-title-small {
    font-size: var(--text-2xl);
}

.section-subtitle {
    text-align: center;
    font-size: var(--text-lg);
    color: var(--color-gray-600);
    margin-bottom: var(--space-12);
}

/* ============================================================================
   SECTION 8: ABOUT SECTION
   ============================================================================
   Company overview with three info cards
   ============================================================================ */

.about-section {
    background-color: var(--color-white);
}

.about-grid {
    display: grid;
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.about-card {
    text-align: center;
    padding: var(--space-8);
    background-color: var(--color-gray-100);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: var(--text-5xl);
    margin-bottom: var(--space-4);
}

.card-title {
    margin-bottom: var(--space-4);
}

.card-text {
    color: var(--color-gray-600);
    margin-bottom: 0;
}

/* ============================================================================
   SECTION 9: APPS PORTFOLIO
   ============================================================================
   App showcase cards with hover effects
   ============================================================================ */

.apps-section {
    background-color: var(--color-secondary);
}

.apps-grid {
    display: grid;
    gap: var(--space-8);
}

@media (min-width: 1024px) {
    .apps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* App Card Base Styles */
.app-card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    display: flex;
    flex-direction: column;
}

.app-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

/* Featured card gets special treatment */
.app-card-featured {
    border: 3px solid var(--color-accent);
}

@media (min-width: 1024px) {
    .app-card-featured {
        grid-column: span 1;
    }
}

/* App Card Image */
.app-card-image {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.app-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.app-card:hover .app-card-image img {
    transform: scale(1.05);
}

/* Placeholder for coming soon */
.app-card-image-placeholder {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-icon {
    font-size: var(--text-7xl);
    opacity: 0.5;
}

/* App Card Badge */
.app-card-badge {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.app-card-badge-soon {
    background-color: var(--color-gold);
    color: var(--color-primary);
}

/* App Card Content */
.app-card-content {
    padding: var(--space-6);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.app-card-title {
    margin-bottom: var(--space-2);
}

.app-card-tagline {
    font-style: italic;
    color: var(--color-gray-500);
    margin-bottom: var(--space-4);
}

.app-card-description {
    color: var(--color-gray-600);
    margin-bottom: var(--space-6);
    flex-grow: 1;
}

.app-card-features {
    list-style: none;
    padding: 0;
    margin-bottom: var(--space-6);
}

.app-card-features li {
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.app-card-features li:last-child {
    border-bottom: none;
}

/* Coming Soon Teaser */
.coming-soon-teaser {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    background-color: var(--color-gray-100);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
}

.teaser-text {
    font-style: italic;
    color: var(--color-gray-500);
}

.teaser-dots {
    display: flex;
    gap: 4px;
}

.teaser-dots span {
    width: 6px;
    height: 6px;
    background-color: var(--color-gold);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.teaser-dots span:nth-child(1) { animation-delay: -0.32s; }
.teaser-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* ============================================================================
   SECTION 10: DOMAINS SECTION
   ============================================================================
   Domain information display
   ============================================================================ */

.domains-section {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-12) 0;
}

.domains-section .section-title {
    color: var(--color-white);
    margin-bottom: var(--space-8);
}

.domains-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-8);
}

.domain-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-6);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    transition: background-color var(--transition-base);
}

.domain-item:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.domain-icon {
    font-size: var(--text-3xl);
}

.domain-info {
    display: flex;
    flex-direction: column;
}

.domain-name {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-gold);
}

.domain-purpose {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
}

/* ============================================================================
   SECTION 11: FOOTER
   ============================================================================
   Site-wide footer with copyright
   ============================================================================ */

.site-footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-400);
    padding: var(--space-12) 0;
    margin-top: auto;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.footer-icon {
    font-size: var(--text-2xl);
}

.footer-name {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    color: var(--color-white);
}

.footer-tagline {
    font-style: italic;
    margin-bottom: var(--space-2);
}

.footer-location {
    margin-bottom: var(--space-6);
}

.footer-copyright {
    font-size: var(--text-sm);
    margin-bottom: 0;
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-gray-800);
}

/* ============================================================================
   SECTION 12: ACCESSIBILITY
   ============================================================================
   Accessibility improvements and user preference support
   ============================================================================ */

/* Reduced Motion
   Respects user preference for less animation */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================================================
   SECTION 13: PRINT STYLES
   ============================================================================
   Optimized for printing
   ============================================================================ */

@media print {
    .site-header,
    .hero-overlay,
    .btn,
    .mobile-menu-toggle {
        display: none !important;
    }
    
    body {
        color: black;
        background: white;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
}