/* ==========================================
   Isrisoft Technologies - Modern Design System
   ========================================== */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

/* CSS Variables */
:root {
    /* Colors (Light Theme Default) */
    --bg-primary: #f3f4f6;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e5e7eb;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-blue: #3b82f6;
    
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    --gradient-blue: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --gradient-glow: radial-gradient(circle, rgba(236, 72, 153, 0.08) 0%, rgba(0,0,0,0) 70%);
    
    /* Cards and Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.06);
    --glass-highlight: rgba(255, 255, 255, 0.5);
    
    /* Layout */
    --max-width: 1200px;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

/* Dark Theme Variables */
body.dark-theme {
    --bg-primary: #070a13;
    --bg-secondary: #0d1222;
    --bg-tertiary: #131a31;
    
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --glass-bg: rgba(13, 18, 34, 0.45);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-highlight: rgba(255, 255, 255, 0.03);
    
    --gradient-glow: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, rgba(0,0,0,0) 70%);
}

/* Base Styles */
html {
    overflow-x: hidden;
    width: 100%;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    width: 100%;
    transition: background-color 0.5s ease, color 0.5s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

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

button {
    font-family: 'Plus Jakarta Sans', sans-serif;
    cursor: pointer;
    border: none;
    outline: none;
    transition: var(--transition-smooth);
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-purple);
}

/* Layout Utilities */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 8rem 0;
    position: relative;
    overflow: hidden;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 5rem auto;
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-purple);
    margin-bottom: 1.5rem;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.section-title {
    font-size: 2.75rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Glassmorphism Card Style */
.glass-card {
    background: radial-gradient(800px circle at var(--mouse-x, 0px) var(--mouse-y, 0px), rgba(139, 92, 246, 0.08), transparent 45%), var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--glass-shadow);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    transition: border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1), transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    transform-style: preserve-3d;
    will-change: transform;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--glass-highlight), transparent);
    pointer-events: none;
    z-index: 1;
}

.glass-card:hover {
    border-color: rgba(139, 92, 246, 0.25);
    box-shadow: 0 12px 40px 0 rgba(139, 92, 246, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 2rem;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    position: relative;
    z-index: 1;
    overflow: hidden;
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    will-change: transform;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(236, 72, 153, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(236, 72, 153, 0.5);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-purple);
    transform: translateY(-2px);
}

.btn-icon {
    margin-left: 0.5rem;
    transition: var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* Floating Glow Backgrounds */
.glow-bg {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: var(--gradient-glow);
    filter: blur(100px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
}

.glow-1 { top: -10%; left: -10%; }
.glow-2 { bottom: -10%; right: -10%; }

/* Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 1.25rem 0;
    transition: var(--transition-smooth);
}

.header.scrolled {
    padding: 0.75rem 0;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* SVG Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.logo-icon {
    width: 38px;
    height: 38px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 900;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

/* Theme Switcher Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.theme-toggle:hover {
    transform: rotate(15deg);
    border-color: var(--accent-purple);
}

.theme-toggle .fa-sun { display: none; }
body.dark-theme .theme-toggle .fa-moon { display: none; }
body.dark-theme .theme-toggle .fa-sun { display: block; }

/* Mobile Menu Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 4px;
    transition: var(--transition-smooth);
}

/* Footer styling */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    padding: 5rem 0 2rem 0;
    position: relative;
    z-index: 10;
    overflow: hidden;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr 1.5fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand p {
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-socials {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.social-icon:hover {
    color: white;
    background: var(--gradient-primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(236, 72, 153, 0.3);
}

.footer-title {
    font-size: 1.15rem;
    margin-bottom: 1.75rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--accent-purple);
    padding-left: 5px;
}

.footer-info {
    list-style: none;
}

.footer-info li {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.footer-info i {
    color: var(--accent-pink);
    margin-top: 0.25rem;
}

.footer-bottom {
    border-top: 1px solid var(--glass-border);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Animations */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 5rem 0;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--bg-secondary);
        border-left: 1px solid var(--glass-border);
        flex-direction: column;
        justify-content: center;
        gap: 2.5rem;
        z-index: 99;
        transition: var(--transition-smooth);
        box-shadow: -10px 0 30px rgba(0,0,0,0.5);
    }
    
    .nav-menu.open {
        right: 0;
    }
    
    /* Hamburger active state */
    .hamburger.open span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }
    .hamburger.open span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.open span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* Custom Cursor Styles */
.custom-cursor-dot,
.custom-cursor-ring {
    position: fixed;
    top: 0;
    left: 0;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 9999;
    border-radius: 50%;
    transition: width 0.3s cubic-bezier(0.25, 1, 0.5, 1), height 0.3s cubic-bezier(0.25, 1, 0.5, 1), background-color 0.3s ease, border-color 0.3s ease, opacity 0.3s ease;
    opacity: 0; /* Hidden by default until JS detects desktop mouse movement */
}

.custom-cursor-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent-purple);
}

.custom-cursor-ring {
    width: 28px;
    height: 28px;
    border: 1.5px solid rgba(139, 92, 246, 0.45);
}

body.dark-theme .custom-cursor-ring {
    border-color: rgba(236, 72, 153, 0.45);
}

/* Hover States */
.custom-cursor-dot.hovered {
    width: 10px;
    height: 10px;
    background-color: var(--accent-pink);
}

.custom-cursor-ring.hovered {
    width: 50px;
    height: 50px;
    border-color: rgba(236, 72, 153, 0.7);
    background-color: rgba(236, 72, 153, 0.04);
}

/* Active Click state */
.custom-cursor-dot.active {
    transform: translate(-50%, -50%) scale(0.6);
}

.custom-cursor-ring.active {
    transform: translate(-50%, -50%) scale(0.85);
    border-color: var(--accent-purple);
}

/* Hide default cursor on desktop */
@media (min-width: 769px) {
    body.custom-cursor-active {
        cursor: none;
    }
    body.custom-cursor-active a, 
    body.custom-cursor-active button, 
    body.custom-cursor-active .clickable, 
    body.custom-cursor-active .accordion-header, 
    body.custom-cursor-active .tab-btn,
    body.custom-cursor-active .social-icon,
    body.custom-cursor-active .theme-toggle {
        cursor: none;
    }
}