/**
 * Nokeed - Main Stylesheet
 * 
 * Shared styles across all pages.
 * Location: /home/nokeed/public_html/assets/css/main.css
 */

/* =============================================
   CSS Variables - Blue Color Palette
   ============================================= */
:root {
    /* Primary Blues */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Accents */
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: var(--spacing-4);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =============================================
   Typography
   ============================================= */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-4);
}

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

a:hover {
    color: var(--color-primary-dark);
}

strong {
    font-weight: 600;
}

/* =============================================
   Layout Components
   ============================================= */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.main-content {
    flex: 1;
    padding-top: 100px; /* Space for floating header */
}

/* No top padding on home page - hero handles it */
.page-home .main-content {
    padding-top: 0;
}

/* =============================================
   Header - Floating Glass Style
   ============================================= */
.site-header {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 32px);
    max-width: var(--container-max);
    z-index: 1000;
}

.header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    
    /* Glass effect */
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    
    /* Shape */
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    
    /* Shadow */
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08),
                0 1px 2px rgba(0, 0, 0, 0.04);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo:hover {
    opacity: 0.9;
}

.logo-img {
    height: 28px;
    width: auto;
}

/* Navigation */
.header-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Nav Icon Links (GitHub, Sponsors, etc.) */
.nav-icon-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--color-gray-500);
    border-radius: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
}

.nav-icon-link:hover {
    color: var(--color-gray-900);
    background: rgba(0, 0, 0, 0.05);
}

.nav-icon-link svg {
    width: 22px;
    height: 22px;
}

/* Sponsors Link - accent color */
.sponsors-link {
    color: var(--color-primary);
}

.sponsors-link:hover {
    color: var(--color-primary-dark);
    background: var(--color-primary-50);
}

.github-link:hover {
    color: var(--color-gray-900);
    background: rgba(0, 0, 0, 0.05);
}

.github-link svg {
    width: 22px;
    height: 22px;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Primary Button */
.btn-primary,
a.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover,
a.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

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

/* Secondary Button */
.btn-secondary,
a.btn-secondary {
    background: var(--color-white);
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-300);
}

.btn-secondary:hover,
a.btn-secondary:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
    border-color: var(--color-gray-400);
}

/* Ghost Button */
.btn-ghost,
a.btn-ghost {
    background: transparent;
    color: var(--color-gray-600);
}

.btn-ghost:hover,
a.btn-ghost:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-base);
}

/* =============================================
   Footer - Single Line Minimalist
   ============================================= */
.site-footer {
    padding: 16px 0;
    border-top: 1px solid var(--color-gray-200);
}

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

.footer-copyright {
    font-size: 13px;
    color: var(--color-gray-400);
}

.footer-nav {
    display: flex;
    gap: 16px;
}

.footer-nav a {
    font-size: 13px;
    color: var(--color-gray-400);
    text-decoration: none;
}

.footer-nav a:hover {
    color: var(--color-gray-600);
}

/* =============================================
   Cards
   ============================================= */
.card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.card-body {
    padding: var(--spacing-6);
}

/* =============================================
   Alerts / Messages
   ============================================= */
.alert {
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-4);
}

.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: var(--color-primary-50);
    color: #1e40af;
    border: 1px solid var(--color-primary-200);
}

/* =============================================
   Utility Classes
   ============================================= */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-gray { color: var(--color-gray-500); }
.text-dark { color: var(--color-gray-900); }
.text-white { color: var(--color-white); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.hidden { display: none; }

/* =============================================
   Loading Spinner
   ============================================= */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* =============================================
   Dropdown Menu
   ============================================= */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-2);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-200);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 50;
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    transition: background var(--transition-fast);
    cursor: pointer;
    text-decoration: none;
}

.dropdown-item:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.dropdown-divider {
    height: 1px;
    background: var(--color-gray-200);
    margin: var(--spacing-2) 0;
}

/* =============================================
   Tooltip
   ============================================= */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-2) var(--spacing-3);
    background: var(--color-gray-900);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-md);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-2);
    z-index: 100;
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--spacing-4);
    }
    
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    
    .btn-lg {
        padding: var(--spacing-3) var(--spacing-6);
        font-size: var(--font-size-sm);
    }
    
    .footer-container {
        gap: var(--spacing-3);
    }
    
    .footer-nav {
        gap: var(--spacing-4);
    }
}

@media (max-width: 640px) {
    .site-header {
        top: 12px;
        width: calc(100% - 24px);
    }
    
    .header-bar {
        padding: 10px 16px;
    }
    
    .logo-img {
        height: 24px;
    }
    
    .main-content {
        padding-top: 80px;
    }
    
    .page-home .main-content {
        padding-top: 0;
    }
}

@media (max-width: 480px) {
    .github-link {
        width: 32px;
        height: 32px;
    }
    
    .github-link svg {
        width: 20px;
        height: 20px;
    }
}