/* SignatureMaker Landing Page Styles */
/* Inspired by NGL.link design with SignatureMaker branding */

:root {
    /* Logo-inspired Colors */
    --color-primary: #FF6B35;
    --color-primary-light: #FF8A65;
    --color-primary-dark: #E64A19;
    --color-secondary: #FF1744;
    --color-accent: #9C27B0;
    --color-tertiary: #2196F3;
    --color-background: #000000;
    --color-surface: #111827;
    --color-surface-light: #1f2937;
    --color-text-primary: #ffffff;
    --color-text-secondary: #d1d5db;
    --color-text-muted: #9ca3af;
    --color-border: #374151;
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;

    /* Logo-inspired Gradients */
    --gradient-primary: linear-gradient(135deg, #FF6B35 0%, #FF1744 25%, #9C27B0 75%, #2196F3 100%);
    --gradient-secondary: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    --gradient-hero: radial-gradient(ellipse at center, rgba(255, 107, 53, 0.15) 0%, transparent 70%);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Animation */
    --transition-base: 0.15s ease;
    --transition-slow: 0.3s ease;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

/* Global Header Background */
body::before {
    content: '';
    position: absolute;
    top: -170px;
    left: -250px;
    right: -250px;
    height: 50vh;
    background: url('assets/header_bg_blur.png');
    background-size: 100% 100%;
    background-position: center top;
    background-repeat: no-repeat;
    pointer-events: none;
    z-index: -1;
}

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

a {
    color: inherit;
    text-decoration: none;
}

/* Utility Classes */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.logo-img {
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    gap: var(--space-8);
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: var(--transition-base);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-base);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    pointer-events: none;
}

.hero-container {
    flex: 1;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: var(--transition-base);
    border: none;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-light);
    transform: translateY(-2px);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

.hero-phone {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-img {
    max-width: 400px;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Features Section */
.features {
    padding: var(--space-24) 0;
    background: var(--gradient-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.feature-card {
    background: var(--color-surface);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--color-border);
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-slow);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    color: white;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.feature-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Demo Section */
.demo {
    padding: var(--space-24) 0;
    background: var(--color-background);
}

.demo-controls {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    margin-bottom: var(--space-12);
    flex-wrap: wrap;
}

.signature-input,
.font-selector {
    padding: var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    min-width: 200px;
}

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

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

.signature-preview {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-12);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.signature-img {
    max-width: 100%;
    max-height: 150px;
    filter: invert(1);
}

.demo-note {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-style: italic;
}

/* Download Section */
.download {
    padding: var(--space-24) 0;
    background: var(--gradient-secondary);
    text-align: center;
}

.download-buttons {
    display: flex;
    gap: var(--space-6);
    justify-content: center;
    margin-bottom: var(--space-16);
    flex-wrap: wrap;
}

.download-btn {
    transition: var(--transition-base);
}

.download-btn:hover {
    transform: translateY(-4px);
}

.store-badge {
    height: 60px;
    filter: brightness(1.1);
}

.download-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
    max-width: 800px;
    margin: 0 auto;
}

.info-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.info-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
}

/* Footer */
.footer {
    padding: var(--space-24) 0 var(--space-8);
    background: var(--color-surface), url('assets/footer_bg_blur.png');
    background-size: auto, 100% 100%;
    background-position: center, center bottom;
    background-repeat: no-repeat;
    border-top: 1px solid var(--color-border);
    position: relative;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: var(--space-16);
    margin-bottom: var(--space-16);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.footer-logo-img {
    width: 32px;
    height: 32px;
}

.footer-logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.footer-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: var(--space-16);
}

.footer-title {
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-list a {
    color: var(--color-text-muted);
    transition: var(--transition-base);
}

.footer-list a:hover {
    color: var(--color-text-primary);
}

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--color-surface-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.footer-copyright {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.footer-legal {
    display: flex;
    gap: var(--space-6);
}

.footer-legal a {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    transition: var(--transition-base);
}

.footer-legal a:hover {
    color: var(--color-text-primary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-12);
    }

    .hero-title {
        font-size: var(--font-size-5xl);
    }

    .phone-img {
        max-width: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        text-align: center;
    }

    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-12);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-4);
    }

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

    .demo-controls {
        flex-direction: column;
        align-items: center;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-info {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }

    .nav-container {
        padding: var(--space-3) var(--space-4);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .feature-card {
        padding: var(--space-6);
    }

    .download-info {
        grid-template-columns: 1fr;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--space-8);
    }

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

/* Animations and Effects */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-text-secondary: #ffffff;
        --color-border: #ffffff;
    }
}

/* Print styles */
@media print {
    .navbar,
    .hero-buttons,
    .download,
    .footer {
        display: none;
    }

    body {
        background: white;
        color: black;
    }
}