/* Noah Rubin Technologies, LLC - Landing Page Styles */

/* ==========================================================================
   1. Design System & CSS Custom Properties
   ========================================================================== */
:root {
    /* Color Palette - Light Mode (Default) */
    --bg-color: #fcfcfc;
    --card-bg: #ffffff;
    --card-border: #e5e5e5;
    --card-border-hover: #e11d48; /* Sophisticated red accent */
    --text-primary: #111111;
    --text-secondary: #555555;
    --text-muted: #888888;
    --accent: #e11d48; /* Main red accent */
    --accent-hover: #be123c;
    --accent-light: rgba(225, 29, 72, 0.05);
    --focus-ring: rgba(225, 29, 72, 0.3);
    
    /* Layout & Spacing */
    --max-width: 740px;
    --border-radius: 12px;
    --transition-speed: 0.25s;
    --transition-curve: cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Color Palette - Dark Mode */
        --bg-color: #0b0b0c;
        --card-bg: #141416;
        --card-border: #222225;
        --card-border-hover: #f43f5e; /* Slightly brighter red for dark mode contrast */
        --text-primary: #f3f4f6;
        --text-secondary: #9ca3af;
        --text-muted: #6b7280;
        --accent: #f43f5e;
        --accent-hover: #fda4af;
        --accent-light: rgba(244, 63, 94, 0.08);
        --focus-ring: rgba(244, 63, 94, 0.4);
    }
}

/* ==========================================================================
   2. Reset & Base Styles
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    padding: 3rem 1.5rem;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
}

/* ==========================================================================
   3. Header Section
   ========================================================================== */
.site-header {
    margin-bottom: 3.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.logo-area {
    color: var(--accent);
    display: flex;
    align-items: center;
}

.company-name {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--text-primary);
}

/* ==========================================================================
   4. Subtitle & Link Styles
   ========================================================================== */
.subtitle {
    font-size: clamp(1.05rem, 3vw, 1.2rem);
    font-weight: 400;
    color: var(--text-secondary);
    letter-spacing: -0.01em;
    line-height: 1.5;
}

.text-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1.5px solid var(--accent);
    transition: color var(--transition-speed) var(--transition-curve),
                border-color var(--transition-speed) var(--transition-curve);
}

.text-link:hover {
    color: var(--accent);
    border-color: var(--accent-hover);
}

.text-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
    border-radius: 4px;
}

/* ==========================================================================
   5. Apps Section & Grid
   ========================================================================== */
.apps-section {
    margin-bottom: 5rem;
}

.section-title {
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-weight: 600;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* App Cards */
.app-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
    transition: border-color var(--transition-speed) var(--transition-curve),
                box-shadow var(--transition-speed) var(--transition-curve),
                transform var(--transition-speed) var(--transition-curve);
}

.app-card:not(.placeholder):hover {
    border-color: var(--card-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
    .app-card:not(.placeholder):hover {
        box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.4);
    }
}

.app-info {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    width: 100%;
}

.app-icon-wrapper {
    color: var(--accent);
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--accent-light);
    border-radius: 10px;
    overflow: hidden;
}

.app-icon-wrapper.has-image {
    background-color: transparent;
}

.app-icon-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-title {
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.app-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* App Action Link */
.app-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-primary);
    border-bottom: 2px solid transparent;
    padding-bottom: 2px;
    transition: border-color var(--transition-speed) var(--transition-curve),
                color var(--transition-speed) var(--transition-curve);
}

.app-link:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.app-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
    border-radius: 4px;
}

.external-icon {
    transition: transform var(--transition-speed) var(--transition-curve);
}

.app-link:hover .external-icon {
    transform: translate(2px, -2px);
}

/* Placeholder Card ("More to Come") */
.app-card.placeholder {
    border-style: dashed;
    border-width: 2px;
    background-color: transparent;
    opacity: 0.85;
}

.app-card.placeholder .app-icon-wrapper {
    color: var(--text-muted);
    background-color: transparent;
    border: 1px dashed var(--card-border);
}

.app-card.placeholder .app-title {
    color: var(--text-muted);
}

.app-card.placeholder .app-description {
    color: var(--text-muted);
}

/* ==========================================================================
   6. Footer Section
   ========================================================================== */
.site-footer {
    border-top: 1px solid var(--card-border);
    padding-top: 2rem;
    margin-top: 2rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: left;
}

/* Screen readers helper */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   7. Responsiveness Tweaks
   ========================================================================== */
@media (max-width: 480px) {
    body {
        padding: 2rem 1rem;
    }
    
    .site-header {
        margin-bottom: 2.5rem;
    }

    
    .apps-grid {
        grid-template-columns: 1fr;
    }
    
    .app-card {
        padding: 1.5rem;
    }
}