/**
 * FileSwift Global Stylesheet
 * Modern, Clean SaaS Design System
 */

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --primary-dark: #3730a3;
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #3b82f6 100%);
    
    --accent: #06b6d4;
    --accent-light: #ecfeff;
    
    --surface: #ffffff;
    --surface-alt: #f8fafc;
    --surface-card: #ffffff;
    --surface-border: #e2e8f0;
    --surface-hover: #f1f5f9;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --text-inverse: #ffffff;

    --success: #10b981;
    --success-bg: #ecfdf5;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --info: #3b82f6;
    --info-bg: #eff6ff;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.04);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --font-heading: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--surface-alt);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

img, svg {
    display: block;
    max-width: 100%;
}

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

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

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

.skip-to-content {
    position: absolute;
    top: -100px;
    left: 1rem;
    background: var(--primary);
    color: var(--text-inverse);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    z-index: 9999;
    font-weight: 600;
    transition: top 0.2s ease;
}

.skip-to-content:focus {
    top: 1rem;
}

/* Layout Container */
.container {
    width: 100%;
    max-width: 1240px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.25;
}

h1 { font-size: 2.75rem; letter-spacing: -0.025em; }
h2 { font-size: 2rem; letter-spacing: -0.02em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }

p {
    color: var(--text-secondary);
}

/* Header & Navbar */
.site-header {
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--surface-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.brand-logo:hover {
    transform: translateY(-1px);
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.brand-icon svg {
    display: block;
    border-radius: 11px;
    box-shadow: 0 4px 10px rgba(0, 102, 255, 0.18);
}

.brand-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    line-height: 1.15;
}

.brand-text {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.brand-accent {
    color: #0084FF;
}

.brand-tagline {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.02em;
    margin-top: 2px;
}

/* Desktop Navigation */
.desktop-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 1.75rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 0.5rem 0.25rem;
}

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

.dropdown-chevron {
    transition: transform 0.2s ease;
}

.nav-item.has-dropdown:hover .dropdown-chevron {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: 0.75rem;
    width: 270px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    pointer-events: none;
}

.nav-item.has-dropdown:hover .dropdown-menu,
.nav-item.has-dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.dropdown-item {
    display: block;
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition);
}

.dropdown-item:hover {
    background-color: var(--surface-hover);
}

.item-title {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.item-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Header Actions & Mobile Toggle */
.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    gap: 5px;
    padding: 0;
}

.hamburger-bar {
    width: 20px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.25;
}

.btn-sm {
    padding: 0.45rem 0.95rem;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 0.95rem 2rem;
    font-size: 1.05rem;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary {
    background-color: var(--surface);
    color: var(--text-primary);
    border-color: var(--surface-border);
}

.btn-secondary:hover {
    background-color: var(--surface-hover);
    border-color: var(--text-light);
}

.btn-success {
    background-color: var(--success);
    color: var(--text-inverse);
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--danger);
    color: var(--text-inverse);
}

.btn:disabled, .btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Hero Section */
.hero-section {
    padding: 5rem 0 4rem;
    text-align: center;
    background: radial-gradient(circle at 50% 0%, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(79, 70, 229, 0.15);
}

.hero-title {
    max-width: 860px;
    margin: 0 auto 1.25rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    max-width: 680px;
    margin: 0 auto 2.5rem;
    color: var(--text-secondary);
}

/* Search Box */
.search-wrapper {
    max-width: 620px;
    margin: 0 auto;
    position: relative;
}

.search-input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 1.25rem;
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 1.1rem 1.25rem 1.1rem 3.5rem;
    font-size: 1.05rem;
    background: var(--surface);
    border: 2px solid var(--surface-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}

/* Sections */
.section {
    padding: 4.5rem 0;
}

.section-alt {
    background-color: var(--surface);
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 3rem;
}

.section-tag {
    display: inline-block;
    color: var(--primary);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.section-title {
    margin-bottom: 0.75rem;
}

.section-subtitle {
    font-size: 1.05rem;
}

/* Tool Cards Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.75rem;
}

.tool-card {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    text-decoration: none;
    color: inherit;
    position: relative;
}

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

.tool-icon-box {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    transition: var(--transition);
}

.tool-card:hover .tool-icon-box {
    background: var(--primary);
    color: var(--text-inverse);
}

.tool-badge {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    background: var(--accent-light);
    color: var(--accent);
}

.tool-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.tool-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex: 1;
    line-height: 1.5;
}

.tool-action {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary);
}

.tool-card:hover .tool-action {
    color: var(--primary-hover);
    transform: translateX(3px);
}

/* Category Filter Tabs */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--surface-border);
    background: var(--surface);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.tab-btn.active {
    background: var(--primary);
    color: var(--text-inverse);
    border-color: var(--primary);
}

/* Feature Blocks ("Why FileSwift") */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

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

.feature-icon-wrapper {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.25rem;
    border-radius: var(--radius-md);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-title {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
}

.feature-desc {
    font-size: 0.95rem;
}

/* How It Works Steps */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.step-card {
    text-align: center;
    position: relative;
}

.step-num {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: var(--text-inverse);
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    box-shadow: 0 0 0 8px var(--primary-light);
}

.step-title {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.step-desc {
    font-size: 0.9rem;
}

/* Accordion FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    text-align: left;
    background: none;
    border: none;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.faq-icon {
    transition: transform 0.2s ease;
    flex-shrink: 0;
    color: var(--primary);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.faq-item.active .faq-answer {
    padding-bottom: 1.25rem;
    max-height: 500px;
}

/* Breadcrumbs */
.breadcrumb-nav {
    padding: 1rem 0;
    border-bottom: 1px solid var(--surface-border);
    background-color: var(--surface);
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.breadcrumb-item a {
    color: var(--text-muted);
}

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

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 600;
}

.breadcrumb-separator {
    color: var(--text-light);
}

/* Footer */
.site-footer {
    background-color: #0b1120;
    color: #94a3b8;
    padding: 4.5rem 0 2rem;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3.5rem;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    margin-bottom: 1.25rem;
}

.footer-brand .brand-text {
    color: #ffffff;
}

.footer-brand .brand-tagline {
    color: #94a3b8;
}

.footer-desc {
    color: #94a3b8;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    max-width: 320px;
}

.footer-privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: #38bdf8;
    font-size: 0.8rem;
    font-weight: 600;
}

.footer-heading {
    color: #ffffff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: #94a3b8;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: #ffffff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
}

.footer-socials {
    display: flex;
    gap: 1.25rem;
}

.footer-socials a {
    color: #94a3b8;
}

.footer-socials a:hover {
    color: #ffffff;
}

/* Ad Placements */
.ad-container {
    margin: 2rem auto;
    text-align: center;
    max-width: 100%;
}

.ad-label {
    font-size: 0.7rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.35rem;
}

.ad-placeholder-box {
    background: var(--surface-hover);
    border: 1px dashed var(--surface-border);
    border-radius: var(--radius-md);
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-placeholder-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Flash Toasts */
.toast-container {
    position: fixed;
    top: 85px;
    right: 1.5rem;
    z-index: 10000;
}

.toast-message {
    background: var(--surface);
    border: 1px solid var(--surface-border);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 280px;
    max-width: 420px;
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-warning { border-left: 4px solid var(--warning); }
.toast-info { border-left: 4px solid var(--info); }

.toast-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: auto;
    color: var(--text-muted);
}