/* Modern Design System - Premium Multi-Tool Website */

/* ============================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================ */
:root {
    /* Primary Color Palette - Vibrant & Modern */
    --primary-gradient: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    /* Category Colors - Rich & Distinctive */
    --color-home: #ff6b35;
    --color-pdf: #f5576c;
    --color-image: #a855f7;
    --color-converter: #10b981;
    --color-calculator: #06b6d4;
    --color-text: #ec4899;
    --color-generator: #f59e0b;

    /* Neutral Colors - Modern Gray Scale */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --black: #000000;

    /* Background Gradients */
    --bg-gradient-light: linear-gradient(135deg, #fff5f0 0%, #ffe5d9 100%);
    --bg-gradient-dark: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    --bg-gradient-warm: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Font Sizes - Fluid Typography */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.8rem + 0.3vw, 1rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
    --text-xl: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 1.3rem + 0.8vw, 1.875rem);
    --text-3xl: clamp(1.875rem, 1.6rem + 1vw, 2.25rem);
    --text-4xl: clamp(2.25rem, 2rem + 1.2vw, 3rem);
    --text-5xl: clamp(3rem, 2.5rem + 2vw, 4rem);

    /* Spacing Scale */
    --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;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows - Layered & Soft */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-blur: blur(10px);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 600ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--bg-gradient-light);
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 {
    font-size: var(--text-5xl);
}

h2 {
    font-size: var(--text-4xl);
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

/* ============================================
   MODERN NAVIGATION - GLASSMORPHIC
   ============================================ */
.modern-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.modern-nav.scrolled {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    transition: transform var(--transition-base);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-logo img {
    height: 45px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
}

.nav-link {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--gray-700);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    transition: left var(--transition-base);
    z-index: -1;
    border-radius: var(--radius-lg);
}

.nav-link:hover::before {
    left: 0;
}

.nav-link:hover {
    color: var(--white);
    transform: translateY(-2px);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--text-2xl);
    color: var(--gray-700);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.mobile-menu-toggle:hover {
    background: var(--gray-100);
    color: var(--color-home);
}

/* ============================================
   MODERN FOOTER
   ============================================ */
.modern-footer {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    color: var(--gray-300);
    padding: var(--space-16) 0 var(--space-8);
    margin-top: var(--space-20);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-section h3 {
    color: var(--white);
    font-size: var(--text-xl);
    margin-bottom: var(--space-4);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-link {
    color: var(--gray-400);
    text-decoration: none;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-link:hover {
    color: var(--white);
    transform: translateX(5px);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-6) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--gray-500);
}

/* ============================================
   HERO SECTION - MODERN
   ============================================ */
.modern-hero {
    padding: calc(80px + var(--space-20)) 0 var(--space-20);
    background: var(--bg-gradient-dark);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.modern-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: 800;
    color: var(--white);
    margin-bottom: var(--space-6);
    line-height: 1.1;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

/* ============================================
   MODERN CARDS - GLASSMORPHIC
   ============================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    padding: var(--space-6);
}

.modern-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: block;
}

.modern-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.modern-card:hover::before {
    transform: scaleX(1);
}

.modern-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(102, 126, 234, 0.3);
}

.card-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    font-size: var(--text-3xl);
    color: var(--white);
    box-shadow: var(--shadow-glow);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-3);
    text-align: center;
}

.card-description {
    font-size: var(--text-sm);
    color: var(--gray-600);
    text-align: center;
    line-height: 1.6;
}

/* ============================================
   MODERN BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--text-base);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

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

.btn-secondary {
    background: var(--white);
    color: var(--gray-800);
    border: 2px solid var(--gray-300);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--color-home);
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes float {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }

    100% {
        background-position: 1000px 0;
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.scale-in {
    animation: scaleIn 0.4s ease-out;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-20) 0;
}

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

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

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

    .modern-hero {
        padding: calc(70px + var(--space-12)) 0 var(--space-12);
    }

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

@media (max-width: 480px) {
    .nav-container {
        padding: var(--space-3) var(--space-4);
    }

    .nav-logo img {
        height: 35px;
    }
}