/* ==========================================================================
   CSS CUSTOM VARIABLES & GLOBAL RESET
   ========================================================================== */
:root {
    /* Fonts */
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', Consolas, monospace;

    /* Transitions & Blurs */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Dark Theme Variables (Default) */
html, html[data-theme="dark"] {
    --bg-primary: hsl(222, 47%, 9%);
    --bg-secondary: hsl(217, 33%, 15%);
    --bg-card: rgba(30, 41, 59, 0.5);
    --border-color: rgba(51, 65, 85, 0.5);
    --border-hover: rgba(56, 189, 248, 0.4);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-secondary: hsl(215, 20%, 65%);
    --text-muted: hsl(215, 16%, 47%);
    
    --accent: hsl(217, 91%, 60%);
    --accent-rgb: 37, 99, 235;
    --accent-gradient: linear-gradient(135deg, hsl(199, 89%, 48%), hsl(263, 70%, 50%));
    --card-shadow: 0 8px 32px 0 rgba(2, 6, 23, 0.45);
    --glow-color: rgba(56, 189, 248, 0.15);
    --glass-blur: blur(16px);
}

/* Light Theme Variables */
html[data-theme="light"] {
    --bg-primary: hsl(210, 40%, 98%);
    --bg-secondary: hsl(0, 0%, 100%);
    --bg-card: rgba(255, 255, 255, 0.7);
    --border-color: rgba(226, 232, 240, 0.8);
    --border-hover: rgba(37, 99, 235, 0.3);
    
    --text-primary: hsl(222, 47%, 11%);
    --text-secondary: hsl(215, 15%, 40%);
    --text-muted: hsl(215, 16%, 60%);
    
    --accent: hsl(221, 83%, 53%);
    --accent-rgb: 37, 99, 235;
    --accent-gradient: linear-gradient(135deg, hsl(221, 83%, 53%), hsl(263, 60%, 50%));
    --card-shadow: 0 8px 32px 0 rgba(148, 163, 184, 0.15);
    --glow-color: rgba(37, 99, 235, 0.05);
    --glass-blur: blur(16px);
}

/* Cyberpunk Neon Theme Variables */
html[data-theme="cyberpunk"] {
    --bg-primary: hsl(275, 45%, 4%);
    --bg-secondary: hsl(275, 30%, 8%);
    --bg-card: rgba(22, 10, 32, 0.65);
    --border-color: rgba(139, 92, 246, 0.35);
    --border-hover: rgba(6, 182, 212, 1);
    
    --text-primary: hsl(180, 100%, 97%);
    --text-secondary: hsl(270, 20%, 75%);
    --text-muted: hsl(270, 15%, 55%);
    
    --accent: hsl(180, 100%, 50%);
    --accent-rgb: 6, 182, 212;
    --accent-gradient: linear-gradient(135deg, hsl(325, 95%, 55%), hsl(185, 95%, 50%));
    --card-shadow: 0 8px 32px 0 rgba(139, 92, 246, 0.2);
    --glow-color: rgba(6, 182, 212, 0.25);
    --glass-blur: blur(20px);
}

/* Forest Emerald Theme Variables */
html[data-theme="emerald"] {
    --bg-primary: hsl(160, 45%, 6%);
    --bg-secondary: hsl(160, 35%, 10%);
    --bg-card: rgba(10, 35, 25, 0.55);
    --border-color: rgba(52, 211, 153, 0.28);
    --border-hover: rgba(245, 158, 11, 0.85);
    
    --text-primary: hsl(150, 40%, 98%);
    --text-secondary: hsl(150, 20%, 78%);
    --text-muted: hsl(150, 15%, 58%);
    
    --accent: hsl(45, 90%, 52%);
    --accent-rgb: 245, 158, 11;
    --accent-gradient: linear-gradient(135deg, hsl(150, 85%, 38%), hsl(45, 90%, 52%));
    --card-shadow: 0 8px 32px 0 rgba(16, 185, 129, 0.15);
    --glow-color: rgba(245, 158, 11, 0.15);
    --glass-blur: blur(14px);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin-right: auto;
    margin-left: auto;
    padding-right: 20px;
    padding-left: 20px;
}

/* Utility Badges & Buttons */
.badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}
.badge:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* ==========================================================================
   NAVIGATION HEADER
   ========================================================================== */
.main-header {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 10px;
}
.logo-icon {
    font-size: 1.8rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.logo-text {
    font-weight: 800;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}
#site-logo-img {
    max-height: 45px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
}
.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}
.nav-link:hover {
    color: var(--text-primary);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}
.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    padding: 8px;
    width: 220px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 100;
}
.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.dropdown-menu a {
    display: block;
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}
.dropdown-menu a:hover {
    background: var(--border-color);
    color: var(--text-primary);
    padding-left: 20px;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.btn-theme-toggle, .btn-admin-nav {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}
.btn-theme-toggle:hover, .btn-admin-nav:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    transform: scale(1.05);
}

/* Toggle icon display values based on data-theme */
html[data-theme="dark"] .sun-icon { display: block; }
html[data-theme="dark"] .moon-icon { display: none; }
html[data-theme="light"] .sun-icon { display: none; }
html[data-theme="light"] .moon-icon { display: block; }

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
    position: relative;
    padding: 60px 0;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.2) 0%, rgba(15, 23, 42, 0) 100%);
    border-bottom: 1px solid var(--border-color);
}
.hero-glow {
    position: absolute;
    width: 600px;
    height: 300px;
    left: 50%;
    top: -150px;
    transform: translateX(-50%);
    background: radial-gradient(circle, var(--glow-color) 0%, rgba(0,0,0,0) 70%);
    z-index: 0;
    pointer-events: none;
}
.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    z-index: 1;
}
.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 30px auto;
    position: relative;
    z-index: 1;
}
.search-box-wrapper {
    position: relative;
    max-width: 550px;
    margin: 0 auto 20px auto;
    z-index: 1;
}
.search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
}
#tool-search {
    width: 100%;
    height: 54px;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    padding: 0 20px 0 52px;
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-sans);
    outline: none;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-fast);
}
#tool-search:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--glow-color), var(--card-shadow);
}
.quick-tags {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.quick-tag-label {
    margin-right: 4px;
}

/* Inner Page Hero */
.hero-inner {
    text-align: left;
    padding: 40px 0;
}
.hero-inner h1 {
    font-size: 2.2rem;
    margin-top: 10px;
}
.back-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}
.back-link:hover {
    color: var(--text-primary);
}
.breadcrumbs {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.breadcrumbs a {
    color: var(--text-muted);
    text-decoration: none;
}
.breadcrumbs a:hover {
    color: var(--text-secondary);
}

/* ==========================================================================
   HOMEPAGE GRID LAYOUT
   ========================================================================== */
.main-content {
    padding-top: 40px;
    padding-bottom: 60px;
    flex: 1;
}
.tools-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
}
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--card-shadow);
}
.sidebar-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    border-left: 3px solid var(--accent);
    padding-left: 10px;
}
.category-menu {
    list-style: none;
}
.cat-menu-link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 4px;
    transition: all var(--transition-fast);
}
.cat-menu-link:hover {
    background: rgba(255,255,255,0.03);
    color: var(--text-primary);
}
.cat-menu-link.active {
    background: var(--accent-gradient);
    color: #fff;
}
.cat-menu-link i {
    width: 18px;
}

.tools-display {
    display: flex;
    flex-direction: column;
}
.section-title {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--text-primary);
}

/* ==========================================================================
   TOOL CARD COMPONENT
   ========================================================================== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}
.inner-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.tool-card {
    position: relative;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: border-color var(--transition-normal), transform var(--transition-normal);
}
.tool-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}
.tool-card-glow {
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--glow-color) 0%, rgba(0,0,0,0) 70%);
    top: -100px;
    right: -100px;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}
.tool-card:hover .tool-card-glow {
    opacity: 1;
}
.tool-card-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    height: 100%;
}
.tool-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.2rem;
    margin-bottom: 16px;
    transition: all var(--transition-fast);
}
.tool-card:hover .tool-icon {
    background: var(--accent-gradient);
    color: #fff;
    border-color: transparent;
    transform: scale(1.05);
}
.tool-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.tool-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex-grow: 1;
}
.btn-tool-link {
    align-self: flex-start;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition-fast);
}
.btn-tool-link:hover {
    gap: 10px;
}

/* ==========================================================================
   TOOL WORKSPACE LAYOUT
   ========================================================================== */
.tool-content-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
}
.tool-body-area {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.tool-wrapper-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--card-shadow);
}
.tool-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.popular-tools-list {
    list-style: none;
}
.popular-tools-list li {
    border-bottom: 1px solid var(--border-color);
}
.popular-tools-list li:last-child {
    border-bottom: none;
}
.popular-tools-list a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 12px 0;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}
.popular-tools-list a:hover {
    color: var(--accent);
    padding-left: 5px;
}
.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tag-badge {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}
.tag-badge:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background: var(--border-color);
}

/* Custom/Fallback Page Content layout */
.page-custom-content {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}
.page-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--card-shadow);
}
.page-card h1, .page-card h2, .page-card h3 {
    margin-top: 24px;
    margin-bottom: 12px;
}
.page-card h1 { font-size: 2.2rem; }
.page-card h2 { font-size: 1.6rem; border-bottom: 1px solid var(--border-color); padding-bottom: 8px; }
.page-card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}
.page-card ul {
    margin-left: 20px;
    margin-bottom: 16px;
    color: var(--text-secondary);
}
.page-card li {
    margin-bottom: 8px;
}

/* ==========================================================================
   AD PLACEMENT PLACEHOLDERS
   ========================================================================== */
.ad-placement {
    margin: 15px auto;
    width: 100%;
    max-width: 728px;
}
.ad-sidebar {
    max-width: 300px;
}

/* ==========================================================================
   FOOTER SECTION
   ========================================================================== */
.main-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding-top: 50px;
    margin-top: auto;
    transition: all var(--transition-normal);
}
.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-primary);
}
.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 320px;
}
.footer-links h4, .footer-seo h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}
.footer-nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color var(--transition-fast);
}
.footer-nav a:hover {
    color: var(--accent);
}
.footer-nav-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}
.footer-nav-grid a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color var(--transition-fast);
}
.footer-nav-grid a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==========================================================================
   FORM & CALCULATOR COMPONENT UI SYSTEMS
   ========================================================================== */
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.form-control {
    width: 100%;
    height: 46px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0 16px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    outline: none;
    transition: all var(--transition-fast);
}
.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--glow-color);
}
textarea.form-control {
    height: auto;
    padding-top: 12px;
    resize: vertical;
}
.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--card-shadow);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--glow-color);
}
.btn-secondary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-secondary:hover {
    border-color: var(--accent);
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}
.calc-results {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
}
.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}
.result-item:last-child {
    border-bottom: none;
}
.result-item span {
    font-size: 0.92rem;
    color: var(--text-secondary);
}
.result-item strong {
    font-size: 1.1rem;
    color: var(--accent);
}
.result-highlight {
    background: var(--glow-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-top: 15px;
    text-align: center;
}
.result-highlight h4 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.result-highlight div {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-top: 4px;
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 992px) {
    .tools-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        display: none; /* Hide left sidebar on tablet/mobile category menu */
    }
    .tool-content-layout {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    .calc-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        height: auto;
        padding: 15px 0;
        gap: 15px;
    }
    .nav-menu {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .footer-content {
        grid-template-columns: 1fr;
    }
    .tool-wrapper-card {
        padding: 20px;
    }
}