/* assets/css/style.css */

:root {
    /* Colors - Premium White + Blue Theme */
    --color-primary: #2563EB;
    --color-primary-dark: #1D4ED8;
    --color-primary-light: #EFF6FF;
    --color-bg: #FFFFFF;
    --color-bg-secondary: #F8FAFC;
    --color-text-main: #0F172A;
    --color-text-muted: #475569;
    --color-border: #E2E8F0;
    
    /* Utility */
    --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);
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.site-header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-main);
}

.brand-logo {
    background-color: var(--color-primary);
    color: white;
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.brand-name {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.desktop-nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.desktop-nav a {
    color: var(--color-text-muted);
    font-weight: 500;
}

.desktop-nav a:hover {
    color: var(--color-primary);
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.header-actions button {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.header-actions button:hover {
    color: var(--color-primary);
}

.mobile-menu-toggle {
    display: none;
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background-color: var(--color-bg);
    box-shadow: var(--shadow-md);
    z-index: 200;
    transition: right 0.3s ease;
    display: flex;
    flex-direction: column;
}

.mobile-nav-drawer.open {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.close-menu {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
}

.mobile-nav-links {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-nav-links a {
    color: var(--color-text-main);
    font-size: 1.125rem;
    font-weight: 500;
}

.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 150;
    display: none;
}

.mobile-nav-overlay.open {
    display: block;
}

/* Main Content */
.main-content {
    flex: 1;
}

/* Hero Section */
.hero {
    background: linear-gradient(to bottom, var(--color-primary-light), var(--color-bg));
    padding: 5rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.hero-search {
    max-width: 600px;
    margin: 0 auto 2rem;
    position: relative;
}

.search-form {
    display: flex;
    gap: 0.5rem;
}

.search-form input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.search-form input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 0.5rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 50;
    text-align: left;
    max-height: 300px;
    overflow-y: auto;
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--color-text-main);
    border-bottom: 1px solid var(--color-border);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-primary);
}

.search-no-results {
    padding: 1rem;
    color: var(--color-text-muted);
    text-align: center;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: white;
}

.btn-secondary {
    background-color: white;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-secondary);
}

/* Features */
.features {
    padding: 4rem 0;
    background-color: var(--color-bg);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--color-bg-secondary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--color-text-muted);
}

/* SEO Content */
.seo-content {
    padding: 4rem 0;
    background-color: var(--color-bg-secondary);
}

.content-box {
    max-width: 800px;
    margin: 0 auto;
}

.content-box h2 {
    margin-bottom: 1rem;
}

.content-box p {
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

/* Footer */
.site-footer {
    background-color: var(--color-text-main);
    color: white;
    padding-top: 4rem;
}

.footer-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    color: #94A3B8;
    margin-top: 1rem;
}

.footer-brand .brand-name {
    color: white;
    font-size: 1.5rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.link-group h3 {
    font-size: 1.125rem;
    margin-bottom: 1.25rem;
    color: white;
}

.link-group ul {
    list-style: none;
}

.link-group li {
    margin-bottom: 0.75rem;
}

.link-group a {
    color: #94A3B8;
}

.link-group a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding: 1.5rem 0;
    text-align: center;
    color: #94A3B8;
}

/* Page Containers */
.page-container {
    padding: 3rem 1.5rem;
}

.page-header {
    margin-bottom: 3rem;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.page-description {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 2rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-primary);
}

.breadcrumb span {
    color: var(--color-text-main);
    font-weight: 500;
}

/* Tools Layout (Sidebar + Grid) */
.tools-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
}

.tools-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-box h3 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.category-filter ul {
    list-style: none;
}

.category-filter li {
    margin-bottom: 0.25rem;
}

.cat-btn {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cat-btn:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-primary);
}

.cat-btn.active {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 500;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: var(--transition);
}

.tool-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.tool-icon {
    font-size: 2rem;
    background-color: var(--color-bg-secondary);
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.tool-info h3 {
    color: var(--color-text-main);
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.tool-desc {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    line-height: 1.4;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
}

.hidden {
    display: none !important;
}

/* Tool View Page */
.tool-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.tool-interface-container {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 3rem;
}

.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    background-color: #FEF3C7;
    color: #92400E;
    border: 1px solid #FDE68A;
}

/* Tool Forms & Results */
.tool-form-group {
    margin-bottom: 1.25rem;
}

.tool-form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-text-main);
}

.tool-form-group input, 
.tool-form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
}

.tool-form-group input:focus, 
.tool-form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.tool-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.tool-result-box {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.tool-result-box h3 {
    margin-bottom: 1rem;
    color: var(--color-text-main);
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.result-item.total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    border-top: 1px solid var(--color-border);
    padding-top: 0.5rem;
    margin-top: 0.5rem;
}

.error-msg {
    color: #DC2626;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}