/* ==== CSS Variables & Core Styles ==== */
:root {
    /* Light Mode Colors */
    --color-primary-light-val: 59, 130, 246;
    --color-primary-light: #3B82F6;
    --color-primary-dark-light: #2563EB;
    --color-bg-light: #FFFFFF;
    --color-bg-secondary-light: #F9FAFB;
    --color-text-light: #1F2937;
    --color-text-muted-light: #6B7280;
    --color-border-light: #E5E7EB;
    --shadow-color-light: rgba(99, 102, 241, 0.1);
    --soft-shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);

    /* Dark Mode Colors */
    --color-primary-dark-val: 96, 165, 250;
    --color-primary-dark: #60A5FA;
    --color-primary-dark-dark: #3B82F6;
    --color-bg-dark: #0F172A;
    --color-bg-secondary-dark: #1E293B;
    --color-text-dark: #F1F5F9;
    --color-text-muted-dark: #94A3B8;
    --color-border-dark: #334155;
    --shadow-color-dark: rgba(0, 0, 0, 0.3);
    --soft-shadow-dark: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.15);

    /* Default to Light Mode */
    --color-primary: var(--color-primary-light);
    --color-primary-darker: var(--color-primary-dark-light);
    --color-bg: var(--color-bg-light);
    --color-bg-secondary: var(--color-bg-secondary-light);
    --color-text: var(--color-text-light);
    --color-text-muted: var(--color-text-muted-light);
    --color-border: var(--color-border-light);
    --shadow-color: var(--shadow-color-light);
    --soft-shadow: var(--soft-shadow-light);
    --primary-val: var(--color-primary-light-val);

    /* Typography */
    --font-family-sans: 'Poppins', sans-serif;
    --base-font-size: 16px;
    --line-height: 1.6;

    /* Spacing & Sizes */
    --header-height: 70px;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --container-width: 1200px;
    --container-padding: 1.5rem;
    --section-padding: 5rem 0;
    
    /* Transitions */
    --transition-speed: 0.3s;
}

/* Dark Mode Variables */
body.dark-mode {
    --color-primary: var(--color-primary-dark);
    --color-primary-darker: var(--color-primary-dark-dark);
    --color-bg: var(--color-bg-dark);
    --color-bg-secondary: var(--color-bg-secondary-dark);
    --color-text: var(--color-text-dark);
    --color-text-muted: var(--color-text-muted-dark);
    --color-border: var(--color-border-dark);
    --shadow-color: var(--shadow-color-dark);
    --soft-shadow: var(--soft-shadow-dark);
    --primary-val: var(--color-primary-dark-val);
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--base-font-size);
}

body {
    font-family: var(--font-family-sans);
    line-height: var(--line-height);
    background-color: var(--color-bg);
    color: var(--color-text);
    padding-top: var(--header-height);
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.75em;
    color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background-color: transparent;
    color: inherit;
}

/* ==== Utility Classes ==== */
.container {
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.section {
    padding: var(--section-padding);
}

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

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

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 0.5rem;
    color: var(--color-text);
    font-size: 2.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-darker));
    border-radius: 3px;
}

/* ==== Animations ==== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.8s ease-out;
}

.animate-fade-in-delay {
    animation: fadeIn 0.8s ease-out 0.2s both;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 0.8s ease-out 0.4s both;
}

/* ==== Buttons ==== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-align: center;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-darker));
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(var(--primary-val), 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(var(--primary-val), 0.4);
    color: #FFFFFF;
}

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

/* ==== Header / Navigation ==== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--color-bg);
    box-shadow: var(--soft-shadow);
    z-index: 1000;
    transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    backdrop-filter: blur(10px);
}

body.dark-mode .main-header {
    background-color: rgba(15, 23, 42, 0.95);
}

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

.logo {
    display: flex;
    align-items: center;
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--color-text);
    transition: color 0.2s ease;
}

.logo:hover {
    color: var(--color-primary);
}

.logo-icon {
    color: var(--color-primary);
    margin-right: 0.5rem;
    font-size: 1.6rem;
}

.nav-menu {
    display: flex;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    color: var(--color-text-muted);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.2s ease;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-speed) ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.dark-mode-toggle {
    font-size: 1.3rem;
    color: var(--color-text-muted);
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.dark-mode-toggle:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-secondary);
}

body.light-mode .icon-dark { display: inline-block; }
body.light-mode .icon-light { display: none; }
body.dark-mode .icon-dark { display: none; }
body.dark-mode .icon-light { display: inline-block; }

.nav-toggle, .nav-close {
    font-size: 1.5rem;
    display: none;
    color: var(--color-text-muted);
    padding: 0.5rem;
    transition: color 0.2s ease;
}

.nav-toggle:hover, .nav-close:hover {
    color: var(--color-primary);
}

/* ==== Hero Section ==== */
.hero-section {
    padding-top: 7rem;
    padding-bottom: 7rem;
    background: linear-gradient(135deg, var(--color-bg), var(--color-bg-secondary));
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(var(--primary-val), 0.1), transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(var(--primary-val), 0.08), transparent 50%);
    pointer-events: none;
}

.hero-headline {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    background: linear-gradient(135deg, var(--color-text), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subheadline {
    font-size: 1.3rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto 2.5rem auto;
    line-height: 1.8;
}

.hero-cta {
    margin-top: 1rem;
}

/* ==== Tools Section ==== */
.tool-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
    align-items: center;
}

.search-input {
    padding: 0.9rem 1.2rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    min-width: 350px;
    font-size: 1rem;
    background-color: var(--color-bg);
    color: var(--color-text);
    transition: all 0.2s ease;
}

.search-input::placeholder {
    color: var(--color-text-muted);
    opacity: 0.8;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(var(--primary-val), 0.1);
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.filter-btn {
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius);
    border: 2px solid var(--color-border);
    color: var(--color-text-muted);
    background-color: var(--color-bg);
    transition: all 0.2s ease;
    font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-darker));
    color: #FFFFFF;
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--primary-val), 0.3);
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.tool-card {
    background-color: var(--color-bg);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--soft-shadow);
    text-align: center;
    transition: all var(--transition-speed) ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: inherit;
    border: 2px solid var(--color-border);
    min-height: 240px;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-darker));
    transform: scaleX(0);
    transition: transform var(--transition-speed) ease;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(var(--primary-val), 0.2);
    border-color: var(--color-primary);
}

body.dark-mode .tool-card {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-border-dark);
}

.card-icon-wrapper {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    flex-shrink: 0;
    transition: transform var(--transition-speed) ease;
}

.tool-card:hover .card-icon-wrapper {
    transform: scale(1.1) rotate(5deg);
}

/* Icon Background Colors */
.icon-bg-blue { background-color: #DBEAFE; }
.icon-text-blue { color: #2563EB; }
.icon-bg-green { background-color: #D1FAE5; }
.icon-text-green { color: #059669; }
.icon-bg-purple { background-color: #EDE9FE; }
.icon-text-purple { color: #7C3AED; }
.icon-bg-red { background-color: #FEE2E2; }
.icon-text-red { color: #DC2626; }
.icon-bg-yellow { background-color: #FEF3C7; }
.icon-text-yellow { color: #D97706; }
.icon-bg-indigo { background-color: #E0E7FF; }
.icon-text-indigo { color: #4F46E5; }
.icon-bg-pink { background-color: #FCE7F3; }
.icon-text-pink { color: #DB2777; }
.icon-bg-gray { background-color: #F3F4F6; }
.icon-text-gray { color: #4B5563; }
.icon-bg-orange { background-color: #FFEDD5; }
.icon-text-orange { color: #F97316; }
.icon-bg-teal { background-color: #CCFBF1; }
.icon-text-teal { color: #0D9488; }
.icon-bg-cyan { background-color: #CFFAFE; }
.icon-text-cyan { color: #0891B2; }
.icon-bg-lime { background-color: #ECFCCB; }
.icon-text-lime { color: #65A30D; }

body.dark-mode .icon-bg-blue { background-color: #1E3A8A; }
body.dark-mode .icon-text-blue { color: #93C5FD; }
body.dark-mode .icon-bg-green { background-color: #047857; }
body.dark-mode .icon-text-green { color: #6EE7B7; }
body.dark-mode .icon-bg-purple { background-color: #5B21B6; }
body.dark-mode .icon-text-purple { color: #C4B5FD; }
body.dark-mode .icon-bg-red { background-color: #991B1B; }
body.dark-mode .icon-text-red { color: #FCA5A5; }
body.dark-mode .icon-bg-yellow { background-color: #92400E; }
body.dark-mode .icon-text-yellow { color: #FDE047; }
body.dark-mode .icon-bg-indigo { background-color: #3730A3; }
body.dark-mode .icon-text-indigo { color: #A5B4FC; }
body.dark-mode .icon-bg-pink { background-color: #9D174D; }
body.dark-mode .icon-text-pink { color: #F9A8D4; }
body.dark-mode .icon-bg-gray { background-color: #374151; }
body.dark-mode .icon-text-gray { color: #D1D5DB; }
body.dark-mode .icon-bg-orange { background-color: #9A3412; }
body.dark-mode .icon-text-orange { color: #FDBA74; }
body.dark-mode .icon-bg-teal { background-color: #0F766E; }
body.dark-mode .icon-text-teal { color: #5EEAD4; }
body.dark-mode .icon-bg-cyan { background-color: #155E75; }
body.dark-mode .icon-text-cyan { color: #67E8F9; }
body.dark-mode .icon-bg-lime { background-color: #3F6212; }
body.dark-mode .icon-text-lime { color: #BEF264; }

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 2.8em;
}

.card-description {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 0;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tool-card.hide {
    display: none;
}

#no-tools-found {
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: 2rem;
    font-size: 1.1rem;
}

/* ==== Popular Tools Section ==== */
.popular-tools-section {
    background-color: var(--color-bg-secondary);
}

.popular-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    max-width: 1400px;
    margin: 0 auto;
}

/* ==== Why Choose Us Section ==== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    text-align: center;
}

.feature-item {
    padding: 2rem;
    transition: transform var(--transition-speed) ease;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-icon {
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.feature-icon i {
    width: 50px;
    height: 50px;
    line-height: 50px;
}

.feature-title {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

/* ==== Footer ==== */
.main-footer {
    padding: 4rem 0 1.5rem 0;
    border-top: 2px solid var(--color-border);
    background-color: var(--color-bg-secondary);
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.footer-about .logo {
    margin-bottom: 1rem;
    display: inline-flex;
}

.footer-about p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-link {
    font-size: 1.3rem;
    color: var(--color-text-muted);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--color-bg);
    transition: all 0.2s ease;
}

.social-link:hover {
    color: #FFFFFF;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-darker));
    transform: translateY(-3px);
}

.footer-title {
    font-size: 1.15rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
}

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

.footer-links ul li a {
    color: var(--color-text-muted);
    transition: all 0.2s ease;
}

.footer-links ul li a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

.footer-contact p {
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-muted);
}

.footer-contact i {
    color: var(--color-primary);
    width: 20px;
    text-align: center;
}

.footer-copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

/* ==== Page Content Styles (for additional pages) ==== */
.page-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.page-content h1 {
    margin-bottom: 2rem;
}

.page-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
}

.page-content p {
    margin-bottom: 1.25rem;
    line-height: 1.8;
}

.page-content ul, .page-content ol {
    margin-left: 2rem;
    margin-bottom: 1.25rem;
}

.page-content ul li, .page-content ol li {
    margin-bottom: 0.5rem;
    list-style: disc;
    color: var(--color-text-muted);
}

.page-content ol li {
    list-style: decimal;
}

/* ==== Responsive Design ==== */
@media (max-width: 992px) {
    :root {
        --section-padding: 4rem 0;
        --container-padding: 1.25rem;
    }
    
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    
    .hero-headline { font-size: 3rem; }
    
    .tool-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
    }
    
    .tool-card {
        min-height: 220px;
        padding: 1.5rem;
    }
    
    .features-grid {
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --section-padding: 3rem 0;
    }
    
    body {
        padding-top: var(--header-height);
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100%;
        background-color: var(--color-bg);
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        padding: 5rem 2rem 2rem;
        flex-direction: column;
        transition: right 0.4s ease;
        z-index: 1010;
        overflow-y: auto;
    }

    body.dark-mode .nav-menu {
        box-shadow: -2px 0 15px rgba(0, 0, 0, 0.3);
    }

    .nav-menu.show-menu {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 2rem;
        width: 100%;
    }

    .nav-link {
        font-size: 1.1rem;
        width: 100%;
        padding: 0.75rem 0;
    }

    .nav-close {
        display: block;
        position: absolute;
        top: 1.5rem;
        right: 1.5rem;
        font-size: 2rem;
    }

    .nav-toggle {
        display: block;
    }

    .hero-headline {
        font-size: 2.5rem;
    }

    .hero-subheadline {
        font-size: 1.1rem;
    }

    .tool-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .search-input {
        min-width: auto;
        width: 100%;
    }

    .tool-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 1.25rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-contact p {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    :root {
        --section-padding: 2.5rem 0;
    }
    
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    
    .hero-headline {
        font-size: 2rem;
    }
    
    .hero-subheadline {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .tool-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .tool-card {
        padding: 1.25rem;
        min-height: 200px;
    }

    .card-title {
        font-size: 1rem;
    }

    .card-description {
        font-size: 0.85rem;
    }

    .features-grid {
        gap: 1.5rem;
    }

    .feature-item {
        padding: 1.5rem;
    }
    
    .btn-lg {
        padding: 0.85rem 2rem;
        font-size: 1rem;
    }
}

/* ==== Scroll to Top Button (Optional Enhancement) ==== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-darker));
    color: #FFFFFF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(var(--primary-val), 0.4);
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(var(--primary-val), 0.5);
}