/* ==========================================
   Shubham Portfolio - Custom Styles
   ========================================== */

/* ==========================================
   CSS Variables
   ========================================== */
:root {
    --primary: #7C3AED;
    --secondary: #EC4899;
    --dark-100: #1E1E2E;
    --dark-200: #181825;
    --dark-300: #11111B;
    --light-100: #F8FAFC;
    --light-200: #E2E8F0;
    --light-300: #CBD5E1;
}

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

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

/* Selection styling */
::selection {
    background: var(--primary);
    color: white;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-300);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--secondary), var(--primary));
}

/* ==========================================
   Loader Styles
   ========================================== */
#loader {
    z-index: 9999;
}

#loader.fade-out {
    opacity: 0;
    pointer-events: none;
}

/* ==========================================
   Navigation Styles
   ========================================== */
.nav-link {
    position: relative;
    color: var(--light-300);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: white;
}

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

/* ==========================================
   Card Hover Effects
   ========================================== */
.hover-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* ==========================================
   Marquee Animation
   ========================================== */
.marquee-container {
    overflow: hidden;
    white-space: nowrap;
}

.marquee-content {
    display: inline-flex;
    animation: marquee 25s linear infinite;
}

.marquee-item {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin: 0 2rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.marquee-star {
    margin: 0 1rem;
    font-size: 1.25rem;
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* Pause marquee on hover */
.marquee-container:hover .marquee-content {
    animation-play-state: paused;
}

/* ==========================================
   Tech Stack Icons
   ========================================== */
.tech-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 1;
    background: var(--dark-200);
    border-radius: 1rem;
    transition: all 0.3s ease;
}

.tech-icon:hover {
    background: var(--dark-100);
    transform: translateY(-5px);
}

/* ==========================================
   Skill Bars Animation
   ========================================== */
.skill-bar {
    width: 0;
    animation: skillFill 1.5s ease forwards;
}

@keyframes skillFill {
    from {
        width: 0;
    }
    to {
        width: var(--skill-width, 100%);
    }
}

/* Trigger animation when in view */
.skill-bar[style*="95%"] { --skill-width: 95%; }
.skill-bar[style*="90%"] { --skill-width: 90%; }
.skill-bar[style*="85%"] { --skill-width: 85%; }
.skill-bar[style*="80%"] { --skill-width: 80%; }
.skill-bar[style*="75%"] { --skill-width: 75%; }

/* ==========================================
   Filter Buttons
   ========================================== */
.filter-btn {
    padding: 0.625rem 1.25rem;
    background: var(--dark-100);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.75rem;
    color: var(--light-300);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    background: var(--dark-200);
    color: white;
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: transparent;
    color: white;
}

/* ==========================================
   Project Cards
   ========================================== */
.project-card {
    transition: all 0.3s ease;
}

.project-card.hidden {
    display: none;
}

.project-card:hover {
    transform: translateY(-5px);
}

/* ==========================================
   Form Styles
   ========================================== */
input, textarea, select {
    font-family: inherit;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

/* Custom select dropdown styling */
select option {
    background: var(--dark-200);
    color: white;
}

/* ==========================================
   FAQ Accordion
   ========================================== */
.faq-item .faq-toggle i {
    transition: transform 0.3s ease;
}

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

.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-content {
    max-height: 200px;
}

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

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(124, 58, 237, 0.6);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Animate elements on scroll */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for grid items */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }

/* ==========================================
   Gradient Text
   ========================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================
   Button Styles
   ========================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 0.75rem;
    font-weight: 500;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.3);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--dark-200);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.75rem;
    font-weight: 500;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--dark-100);
    transform: translateY(-2px);
}

/* ==========================================
   Glassmorphism Effect
   ========================================== */
.glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ==========================================
   Responsive Utilities
   ========================================== */
@media (max-width: 768px) {
    .marquee-item {
        font-size: 1rem;
    }
    
    .hide-mobile {
        display: none !important;
    }
}

@media (max-width: 640px) {
    .marquee-item {
        font-size: 0.875rem;
        margin: 0 1rem;
    }
}

/* ==========================================
   Light Theme (Optional)
   ========================================== */
.light-theme {
    --dark-100: #F1F5F9;
    --dark-200: #E2E8F0;
    --dark-300: #FFFFFF;
    --light-100: #1E1E2E;
    --light-200: #374151;
    --light-300: #4B5563;
}

.light-theme body {
    background: var(--dark-300);
    color: var(--light-100);
}

/* ==========================================
   Print Styles
   ========================================== */
@media print {
    nav, footer, .no-print {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* ==========================================
   Accessibility
   ========================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .marquee-content {
        animation: none;
    }
}