/* ============================================================
   Tool Section Label & Badge
   ============================================================ */
.tools-section-label {
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    margin-top: 2rem;
    margin-bottom: .75rem;
    padding-bottom: .4rem;
    border-bottom: 1px solid var(--border-color);
}

.tool-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    font-size: .65rem;
    font-weight: 700;
    padding: .1rem .45rem;
    border-radius: 100px;
    letter-spacing: .04em;
    vertical-align: middle;
    margin-left: .3rem;
    text-transform: uppercase;
}

.tool-card--accent::before { opacity: 1; } /* always show gradient top-border on new tools */

/* ============================================================
   QR Code Tool Tabs
   ============================================================ */
.qr-tabs {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: .6rem;
}

.qr-tab {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: .45rem 1rem;
    font-size: .875rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    font-family: inherit;
    transition: all .2s;
}

.qr-tab:hover { color: var(--primary-color); border-color: var(--primary-color); }
.qr-tab.active { background: var(--primary-color); color: #fff; border-color: var(--primary-color); }

.qr-panel { display: none; }
.qr-panel.active { display: block; }

.qr-output {
    margin-top: 1.5rem;
    text-align: center;
    padding: 1.5rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.qr-output canvas { border-radius: var(--radius-md); max-width: 100%; }

/* ============================================================
   CSS Custom Properties
   ============================================================ */
:root {
    --primary-color:  #4F46E5;
    --primary-hover:  #4338CA;
    --secondary-color: #10B981;
    --secondary-hover: #059669;
    --background-color: #F9FAFB;
    --surface-color:  #FFFFFF;
    --text-main:      #111827;
    --text-muted:     #6B7280;
    --border-color:   #E5E7EB;
    --shadow-sm:  0 1px 2px 0 rgba(0,0,0,.05);
    --shadow-md:  0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
    --shadow-lg:  0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05);
    --radius-md:  0.5rem;
    --radius-lg:  1rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #111827;
        --surface-color:    #1F2937;
        --text-main:        #F9FAFB;
        --text-muted:       #9CA3AF;
        --border-color:     #374151;
    }
}

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

html { scroll-behavior: smooth; }

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

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

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

/* ============================================================
   Header & Navigation
   ============================================================ */
header {
    background-color: var(--surface-color);
    box-shadow: var(--shadow-sm);
    padding: 0.875rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.logo {
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    letter-spacing: -0.02em;
}

.logo svg { flex-shrink: 0; }

nav ul {
    list-style: none;
    display: flex;
    gap: 0.25rem;
    align-items: center;
    flex-wrap: wrap;
}

nav a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-md);
    transition: background 0.2s, color 0.2s;
}

nav a:hover {
    color: var(--primary-color);
    background: rgba(79, 70, 229, 0.07);
}

/* Hamburger toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Main Content
   ============================================================ */
main {
    flex: 1;
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    width: 100%;
}

/* ============================================================
   Breadcrumb
   ============================================================ */
.breadcrumb {
    padding: 0.5rem 0 1rem;
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.2rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.breadcrumb li + li::before {
    content: '›';
    margin-right: 0.35rem;
    color: var(--border-color);
    font-size: 1.1rem;
}

.breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

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

.breadcrumb span[aria-current="page"] {
    color: var(--text-main);
    font-weight: 500;
}

/* ============================================================
   Hero (Homepage)
   ============================================================ */
.hero {
    text-align: center;
    padding: 4.5rem 0 3rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary-color);
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: 100px;
    padding: 0.35rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.75;
}

/* Trust badges */
.trust-badges {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.trust-badge .badge-icon { font-size: 1.1rem; }

/* ============================================================
   Tools Grid (Homepage)
   ============================================================ */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.tool-card {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: 2rem 1.75rem;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.25s;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(79, 70, 229, 0.3);
}

.tool-card:hover::before { opacity: 1; }

.tool-icon {
    font-size: 2.75rem;
    margin-bottom: 1rem;
    line-height: 1;
}

.tool-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.tool-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.tool-card .arrow {
    margin-top: 1rem;
    color: var(--primary-color);
    font-size: 1.2rem;
    transition: transform 0.2s;
}

.tool-card:hover .arrow { transform: translateX(4px); }

/* ============================================================
   Homepage intro section
   ============================================================ */
.intro-section {
    max-width: 800px;
    margin: 3rem auto 0;
    padding: 2.5rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.intro-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.intro-section p {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 0.75rem;
}

.intro-section p:last-child { margin-bottom: 0; }

/* ============================================================
   Tool Page Header
   ============================================================ */
.tool-page-header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem 0 1rem;
}

.tool-page-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.2;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.tool-page-header p {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto;
}

/* ============================================================
   Upload / Action Form
   ============================================================ */
.action-form {
    max-width: 760px;
    margin: 0 auto 2rem;
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.upload-container {
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    border: 2px dashed var(--border-color);
    text-align: center;
    transition: border-color 0.2s, background 0.2s;
    cursor: pointer;
}

.upload-container:hover,
.upload-container.dragover {
    border-color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.04);
}

.upload-container input[type="file"] { display: none; }

.upload-container .tool-icon { margin-bottom: 0.75rem; }

.upload-container h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.upload-container p { color: var(--text-muted); font-size: 0.9rem; }

.upload-btn {
    background-color: var(--primary-color);
    color: white;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius-md);
    border: none;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    margin-top: 1rem;
    display: inline-block;
    font-family: inherit;
}

.upload-btn:hover { background-color: var(--primary-hover); transform: translateY(-1px); }
.upload-btn:active { transform: translateY(0); }

/* ============================================================
   File List
   ============================================================ */
.file-list {
    margin-top: 1.25rem;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem 1rem;
    background-color: var(--background-color);
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s;
}

.file-item:hover { border-color: var(--primary-color); }

.file-name {
    font-weight: 500;
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    margin-right: 1rem;
}

.remove-btn {
    color: #EF4444;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.25rem 0.4rem;
    border-radius: 4px;
    transition: background 0.2s;
    line-height: 1;
    flex-shrink: 0;
}

.remove-btn:hover { background: rgba(239, 68, 68, 0.1); }

/* ============================================================
   Form Elements
   ============================================================ */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-main);
}

.form-group input[type="text"],
.form-group input[type="number"],
input[type="number"] {
    width: 100%;
    padding: 0.65rem 0.875rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--background-color);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

/* ============================================================
   Submit Button
   ============================================================ */
.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--secondary-color), #0EA5E9);
    color: white;
    padding: 1rem;
    border-radius: var(--radius-md);
    border: none;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
    font-family: inherit;
    letter-spacing: 0.01em;
    margin-top: 1.25rem;
}

.submit-btn:hover:not(:disabled) { opacity: 0.92; transform: translateY(-1px); }
.submit-btn:active:not(:disabled) { transform: translateY(0); }
.submit-btn:disabled { background: var(--border-color); color: var(--text-muted); cursor: not-allowed; }

/* ============================================================
   Progress Bar
   ============================================================ */
.progress-container {
    display: none;
    margin-top: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.4s ease;
}

.progress-text {
    text-align: center;
    margin-top: 0.6rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ============================================================
   Alerts
   ============================================================ */
.alert {
    padding: 0.875rem 1rem;
    border-radius: var(--radius-md);
    margin-top: 1rem;
    display: none;
    font-size: 0.9rem;
    line-height: 1.5;
}

.alert.error {
    background-color: #FEE2E2;
    color: #B91C1C;
    border: 1px solid #F87171;
    display: block;
}

.alert.success {
    background-color: #D1FAE5;
    color: #047857;
    border: 1px solid #34D399;
    display: block;
}

@media (prefers-color-scheme: dark) {
    .alert.error  { background: rgba(185,28,28,.2); color: #FCA5A5; border-color: #991B1B; }
    .alert.success { background: rgba(4,120,87,.2); color: #6EE7B7; border-color: #065F46; }
}

/* ============================================================
   Content Sections (Tool pages — SEO content)
   ============================================================ */
.content-section {
    max-width: 760px;
    margin: 3rem auto 2rem;
}

.content-block {
    margin-bottom: 3rem;
}

.content-block h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-main);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.content-block p {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 0.875rem;
}

.content-block p:last-child { margin-bottom: 0; }

/* ============================================================
   Step List
   ============================================================ */
.steps-list {
    list-style: none;
    counter-reset: steps;
    padding: 0;
    margin: 0.5rem 0;
}

.steps-list li {
    counter-increment: steps;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-muted);
    line-height: 1.6;
}

.steps-list li:last-child { border-bottom: none; }

.steps-list li::before {
    content: counter(steps);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 2rem;
    height: 2rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

/* ============================================================
   Benefits Grid
   ============================================================ */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 1rem;
    margin: 0.75rem 0;
}

.benefit-item {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    transition: border-color 0.2s, transform 0.2s;
}

.benefit-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.benefit-item .benefit-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }

.benefit-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: var(--text-main);
}

.benefit-item p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* ============================================================
   FAQ Accordion
   ============================================================ */
.faq-list {
    margin: 0.5rem 0;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 0.625rem;
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.faq-item.open { box-shadow: var(--shadow-sm); }

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1rem 1.25rem;
    background: var(--surface-color);
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
    font-family: inherit;
    transition: background 0.2s;
}

.faq-question:hover { background: var(--background-color); }

.faq-arrow {
    flex-shrink: 0;
    transition: transform 0.3s ease;
    color: var(--text-muted);
}

.faq-item.open .faq-arrow { transform: rotate(180deg); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.2s ease;
    background: var(--surface-color);
}

.faq-item.open .faq-answer {
    max-height: 300px;
}

.faq-answer-inner {
    padding: 0 1.25rem 1.25rem;
    color: var(--text-muted);
    line-height: 1.75;
    font-size: 0.9rem;
}

/* ============================================================
   Homepage FAQ / Content Section (simple)
   ============================================================ */
.content-section-simple {
    margin-top: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.content-section-simple h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.content-section-simple p { color: var(--text-muted); line-height: 1.8; margin-bottom: 0.875rem; }

/* ============================================================
   Related Tools
   ============================================================ */
.related-tools {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 3rem 1.5rem;
}

.related-tools-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.related-tools h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1rem;
}

.related-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

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

.related-icon { font-size: 1.75rem; flex-shrink: 0; line-height: 1; }

.related-card strong {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
    color: var(--text-main);
}

.related-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.4;
}

/* ============================================================
   Footer
   ============================================================ */
footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 3rem 1.5rem 1.5rem;
    margin-top: auto;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.footer-brand .logo { margin-bottom: 0.75rem; }

.footer-brand p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 280px;
}

.footer-links-group h3 {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 0.875rem;
}

.footer-links-group ul { list-style: none; padding: 0; }

.footer-links-group li { margin-bottom: 0.5rem; }

.footer-links-group a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links-group a:hover { color: var(--primary-color); }

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.825rem;
    line-height: 1.7;
}

/* Legacy footer-links for any remaining usage */
.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.875rem; }
.footer-links a:hover { color: var(--primary-color); }

/* ============================================================
   AdSense Placeholder
   ============================================================ */
.adsense-placeholder {
    background-color: var(--border-color);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin: 1.5rem auto;
    max-width: 1200px;
    width: calc(100% - 3rem);
    text-align: center;
    min-height: 90px;
    font-size: 0.875rem;
}

/* ============================================================
   Responsive — Mobile
   ============================================================ */
@media (max-width: 900px) {
    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    header { padding: 0.875rem 1rem; }

    .nav-toggle { display: flex; }

    #mainNav {
        display: none;
        position: absolute;
        top: calc(100% + 1px);
        left: -1rem;
        right: -1rem;
        background: var(--surface-color);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
        padding: 0.75rem 1rem 1rem;
        box-shadow: var(--shadow-lg);
    }

    #mainNav.open { display: block; }

    #mainNav ul {
        flex-direction: column;
        gap: 0;
    }

    #mainNav ul li a {
        display: block;
        padding: 0.65rem 0.5rem;
        border-radius: var(--radius-md);
    }

    main { padding: 0 1rem; margin: 1.25rem auto; }

    .hero { padding: 2.5rem 0 2rem; }

    .tools-grid { gap: 1rem; }

    .tool-card { padding: 1.5rem 1.25rem; }

    .action-form { padding: 1.25rem; }

    .upload-container { padding: 2rem 1.25rem; }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

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

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

    .intro-section { padding: 1.5rem; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.75rem; }

    .trust-badges { gap: 1rem; }

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

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