/* =========================================================================
   SmartTools Hub - Global Stylesheet (Dark Mode Only)
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-color: #050510;
    --surface-color: #11111c;
    --surface-hover: #171725;
    --primary-color: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-glow: rgba(59, 130, 246, 0.4);
    --accent-color: #0ea5e9;
    --accent-hover: #38bdf8;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    --border-color: #27273a;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    --glow: 0 0 20px var(--primary-glow);
    --transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-fast: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    font-family: 'Inter', sans-serif;
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

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

ul {
    list-style: none;
}

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

/* =========================== Typography =========================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-main);
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    letter-spacing: -1px;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

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

.text-gradient {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
    font-size: 2.5rem;
}

/* =========================== Layout =========================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

main {
    flex: 1;
}

/* =========================== Buttons =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn:hover {
    color: #ffffff;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 14px 0 var(--primary-glow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
}

/* =========================== Hero Section =========================== */
.hero {
    text-align: center;
    padding-top: 50px;
    padding-bottom: 40px;
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    letter-spacing: -2px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* =========================== Section Spacing =========================== */
section.container {
    padding-top: 40px;
    padding-bottom: 40px;
}

section.hero {
    padding-top: 50px;
    padding-bottom: 40px;
}

/* =========================== Header / Nav =========================== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(17, 17, 28, 0.65);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    z-index: 1001;
    position: relative;
}

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

nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
    transition: var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1001;
}

/* =========================== Cards & Grid =========================== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px -10px rgba(59, 130, 246, 0.2);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
}

.card h3 {
    margin-bottom: 1rem;
    font-size: 1.35rem;
}

.card p {
    flex-grow: 1;
    margin-bottom: 2rem;
    font-size: 1rem;
    color: var(--text-muted);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: auto;
    color: var(--primary-color);
}

.card-link span {
    transition: transform 0.2s ease;
}

.card-link:hover span {
    transform: translateX(4px);
}

/* =========================== Tool Page Styles =========================== */
.tool-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    margin-bottom: 2rem;
}

.result-box {
    display: none;
    margin-top: 2rem;
    padding: 2rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.result-box.active {
    display: block;
}

.input-group {
    margin-bottom: 1.5rem;
}

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

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 1rem;
    transition: var(--transition-fast);
    outline: none;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* =========================== Drop Zone =========================== */
.drop-zone {
    padding: 4rem 2rem;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    background: rgba(59, 130, 246, 0.05);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 2rem;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.10);
}

.drop-zone-text {
    color: var(--text-muted);
    margin-top: 1rem;
}

.file-list {
    margin-top: 1.5rem;
    display: grid;
    gap: 1.5rem;
}

.file-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.file-preview {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    background: #262D3D;
}

.file-details {
    flex: 1;
    min-width: 200px;
}

.file-name {
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.25rem;
    word-break: break-all;
}

.file-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.file-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.format-select {
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--surface-hover);
    color: var(--text-main);
    outline: none;
}

.download-btn {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
}

.download-btn:hover {
    background: var(--primary-hover);
    color: #fff;
}

/* =========================== Form Controls (Dark Theme) =========================== */
.form-control,
input[type="number"],
input[type="text"],
input[type="email"],
input[type="url"],
input[type="tel"],
input[type="password"],
input[type="search"],
select,
textarea {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    padding: 0.65rem 1rem;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: var(--transition-fast);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.form-control:focus,
input[type="number"]:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="tel"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

/* Range input slider */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 0 6px var(--primary-glow);
}

/* Checkbox styling */
input[type="checkbox"] {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
    cursor: pointer;
    position: relative;
}

input[type="checkbox"]:checked {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    color: white;
    font-size: 12px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* =========================== Clickable Cards =========================== */
.card {
    cursor: pointer;
    position: relative;
}

.card>a.card-link {
    /* Make sure the link still works as the primary action */
    position: relative;
    z-index: 2;
}

/* =========================== SEO Content Sections =========================== */
.seo-content {
    margin-top: 3rem;
    padding: 2.5rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.seo-content h2 {
    margin-bottom: 1rem;
    font-size: 1.75rem;
}

.seo-content h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
    color: var(--primary-hover);
}

.seo-content p {
    margin-bottom: 1rem;
}

.seo-content ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    list-style: disc;
}

.seo-content ul li {
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.faq-section {
    margin-top: 3rem;
}

.faq-section h2 {
    margin-bottom: 1.5rem;
}

.faq-item {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.faq-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.faq-item p {
    margin-bottom: 0;
}

.related-tools {
    margin-top: 3rem;
}

.related-tools h2 {
    margin-bottom: 1.5rem;
}

/* =========================== Footer =========================== */
.footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 64px 0 32px;
    margin-top: 80px;
}

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

.footer-col h4 {
    color: var(--text-main);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

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

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

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 0.25rem;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* =========================== Responsive =========================== */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 3rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    /* Hero */
    .hero {
        padding-top: 60px;
        padding-bottom: 40px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    /* Sections – less padding on mobile but still visible */
    section.container {
        padding-top: 48px;
        padding-bottom: 48px;
    }

    /* Mobile Nav */
    .mobile-menu-btn {
        display: block;
        margin-left: auto;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--surface-color);
        flex-direction: column;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
        z-index: 990;
    }

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

    .nav-item {
        width: 100%;
        text-align: center;
    }

    .nav-link {
        display: block;
        padding: 1.25rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-link::after {
        display: none;
    }

    /* Grid: single column on mobile */
    .grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    /* Footer */
    .footer {
        margin-top: 48px;
    }

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

    .footer-col p {
        margin: 0 auto;
    }

    /* Tool card */
    .tool-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-btns {
        flex-direction: column;
    }

    .hero h1 {
        font-size: 2rem;
    }
}
/* =========================== Textarea Full Width Fix =========================== */
textarea.form-control,
textarea {
    width: 100% !important;
    box-sizing: border-box !important;
    min-height: 200px;
}