/* 
    ToolHub Modern Multi-Tools CSS
    Style: Minimal, Spacious, Professional
*/

:root {
    /* Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --text-main: #111827;
    --text-muted: #4b5563;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 20px -2px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 30px -5px rgba(0,0,0,0.1);
    
    /* Tool Icon Colors */
    --red: #ef4444;
    --blue: #3b82f6;
    --purple: #8b5cf6;
    --orange: #f97316;
    --cyan: #06b6d4;
    --yellow: #eab308;
    --pink: #ec4899;
    --green: #10b981;
    --indigo: #6366f1;
    --deep-orange: #f43f5e;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 80px 0;
}

.section-light {
    background-color: var(--bg-light);
}

.text-blue {
    color: var(--primary);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Header */
.main-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: 72px;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background-color: var(--primary);
    border-radius: 8px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-menu ul {
    display: flex;
    gap: 2rem;
}

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

.nav-menu a:hover, .nav-menu a.active {
    color: var(--primary);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-outline {
    border: 2px solid var(--border-color);
    background: white;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    padding: 100px 0 80px;
    text-align: center;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.search-container {
    max-width: 600px;
    margin: 0 auto 2.5rem;
    position: relative;
    display: flex;
    box-shadow: var(--shadow-lg);
    border-radius: 50px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.search-container input {
    width: 100%;
    padding: 1.2rem 2rem;
    border: none;
    outline: none;
    font-size: 1rem;
}

.btn-search {
    padding: 0 1.5rem;
    background: white;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}

.tool-card {
    background: var(--bg-white);
    padding: 2rem 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.tool-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    color: white;
}

.tool-icon svg {
    width: 32px;
    height: 32px;
}

.tool-title {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.tool-description {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tool-button {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    background: rgba(37, 99, 235, 0.05);
    width: 100%;
}

.tool-button:hover {
    background: var(--primary);
    color: white;
}

/* Icon Variants */
.icon-red { background-color: var(--red); }
.icon-blue { background-color: var(--blue); }
.icon-purple { background-color: var(--purple); }
.icon-orange { background-color: var(--orange); }
.icon-cyan { background-color: var(--cyan); }
.icon-yellow { background-color: var(--yellow); }
.icon-pink { background-color: var(--pink); }
.icon-green { background-color: var(--green); }
.icon-indigo { background-color: var(--indigo); }
.icon-deep-orange { background-color: var(--deep-orange); }

/* Categories */
.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.category-card {
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 16px;
    transition: background 0.3s ease;
}

.category-card:hover {
    background: #f1f5f9;
}

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

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

/* Why Choose Us */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.feature-card {
    text-align: center;
}

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

.feature-card h4 {
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Footer */
.main-footer {
    background: var(--bg-light);
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 60px;
}

.footer-brand p {
    margin: 1.5rem 0;
    color: var(--text-muted);
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
}

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

.footer-col h4 {
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-col a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsiveness */

/* Tablets */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .tools-grid { grid-template-columns: repeat(3, 1fr); }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-top { grid-template-columns: 1fr; gap: 3rem; }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-menu { display: none; }
    .mobile-toggle { display: flex; }
    .hero-title { font-size: 2.5rem; }
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
    .category-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: 1fr; }
    .section { padding: 60px 0; }
}

@media (max-width: 480px) {
    .tools-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
    .tool-card { padding: 1.25rem 0.75rem; }
    .tool-title { font-size: 0.95rem; }
    .tool-description { display: none; } /* Hide desc on very small screens for better grid */
}