/* ========================================
   Professional QR Code Generator Styles
   ======================================== */

/* CSS Variables */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-icon {
    width: 28px;
    height: 28px;
    object-fit: contain;
    vertical-align: middle;
}


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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Header */
.header {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.header-content {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.75rem;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
}

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

.nav-link.primary-cta {
    background: var(--primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-sm);
}

.nav-link.primary-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    padding: 6rem 2rem;
    text-align: center;
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.badge {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-light);
}

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

/* Generator Section */
.generator-section {
    padding: 4rem 0;
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    background: var(--bg-secondary);
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

.tab-icon {
    font-size: 1.25rem;
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Generator Card */
.generator-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: 0 20px 50px var(--shadow);
}

.card-header {
    text-align: center;
    margin-bottom: 2rem;
}

.card-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.info-tooltip {
    position: relative;
    cursor: help;
    font-size: 0.875rem;
    opacity: 0.7;
    transition: var(--transition);
}

.info-tooltip:hover {
    opacity: 1;
}

.info-tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 150%;
    right: 0;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 400;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border: 1px solid var(--border);
    box-shadow: 0 10px 30px var(--shadow);
    z-index: 10;
}

.info-tooltip:hover::after {
    opacity: 1;
}

.input,
.select {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.input:focus,
.select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.btn-success {
    background: var(--success);
    color: white;
    margin-top: 1.5rem;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
}

.btn-icon {
    font-size: 1.25rem;
}

.btn:active {
    transform: translateY(0);
}

/* QR Display */
.qr-display {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    margin: 2rem 0;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 2px dashed var(--border);
}

.qr-display canvas {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 30px var(--shadow);
}

/* Messages */
.message {
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    text-align: center;
    margin-top: 1rem;
}

.message.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
}

.hidden {
    display: none;
}

/* Features Section */
.features-section,
.how-section,
.use-cases-section {
    padding: 6rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px var(--shadow);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.step-card h3 {
    margin: 1.5rem 0 0.5rem;
    color: var(--text-primary);
}

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

/* Use Cases */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.use-case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.use-case-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.use-case-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.use-case-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.use-case-card p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
    margin-top: 6rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-about h3,
.footer-links h4,
.footer-contact h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-about p,
.footer-contact p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 0.5rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .nav {
        gap: 1rem;
    }
    
    .generator-card {
        padding: 2rem 1.5rem;
    }
    
    .tab-btn {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .info-tooltip::after {
        white-space: normal;
        width: 200px;
        right: auto;
        left: 50%;
        transform: translateX(-50%);
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .generator-card {
        padding: 1.5rem 1rem;
    }
    
    .nav {
        flex-direction: column;
        gap: 0.5rem;
    }

   .header{
      display : none;
   }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Smooth Animations */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .header,
    .hero,
    .features-section,
    .how-section,
    .use-cases-section,
    .footer,
    .tab-nav,
    .btn {
        display: none;
    }
    
    .generator-card {
        border: 1px solid #ddd;
        box-shadow: none;
    }
}

/* Collapsible Header */
#header-content {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 99;
    transition: transform 0.3s ease, opacity 0.3s ease;
}


/* Hidden State */
.header-hidden {
    transform: translateY(-100%);
    opacity: 0;
}