/* ==========================================================================
   Sai Subrahmanya Prasad - Portfolio Stylesheet (Animated Light Theme)
   ========================================================================== */

:root {
    --primary-blue: #2563eb;
    --primary-indigo: #4f46e5;
    --primary-amber: #d97706;
    --bg-light: #f8fafc;
    --card-bg: #ffffff;
    --card-border: rgba(226, 232, 240, 0.8);
    --text-main: #0f172a;
    --text-muted: #64748b;
}

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

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Typography Enhancements */
h1, h2, h3, .font-serif {
    font-feature-settings: "cv02", "cv03", "cv04", "cv11";
}

/* Glassmorphism Classes */
.glass-panel {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.7);
}

.glass-dark {
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Animations & Keyframes */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-8px);
    }
}

@keyframes pulseSlow {
    0%, 100% {
        opacity: 0.35;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.08);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

.animate-pulse-slow {
    animation: pulseSlow 8s ease-in-out infinite;
}

.animate-fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

/* Interactive Card Elevation & Shimmer */
.achievement-card, 
.domain-card {
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.achievement-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    transform: skewX(-20deg);
    transition: 0.75s;
    pointer-events-none;
}

.achievement-card:hover::after {
    left: 150%;
}

.achievement-card:hover {
    transform: translateY(-4px);
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: 0 15px 30px -10px rgba(37, 99, 235, 0.12), 0 4px 12px rgba(0, 0, 0, 0.03);
}

/* Subtle Gradient Border Accent on Active Elements */
.gradient-border-top {
    position: relative;
}

.gradient-border-top::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #2563eb, #4f46e5, #f59e0b);
    border-top-left-radius: inherit;
    border-top-right-radius: inherit;
}

/* Filter Button Active State */
.filter-btn.active {
    background-color: #2563eb !important;
    color: #ffffff !important;
    border-color: #2563eb !important;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

/* Smooth Reveal on Scroll */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Form Styles */
input:focus, textarea:focus, select:focus {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}