/* ═══════════════════════════════════════════════════════════════
   KokonutUI-Inspired Effects Library for ExamIA
   Glassmorphism · Glow · Animations · Micro-interactions
   ═══════════════════════════════════════════════════════════════ */

/* ── CSS Custom Properties ── */
:root {
    --glass-bg: rgba(255,255,255,0.08);
    --glass-border: rgba(255,255,255,0.15);
    --glass-shadow: 0 8px 32px rgba(0,0,0,0.12);
    --glow-primary: rgba(79,70,229,0.5);
    --glow-accent: rgba(6,182,212,0.5);
    --glow-secondary: rgba(124,58,237,0.4);
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ═══════════════════════════════
   1. GLASSMORPHISM UTILITIES
   ═══════════════════════════════ */
.glass {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255,255,255,0.12);
}

.glass-light {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.4);
    box-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

.glass-dark {
    background: rgba(30,27,75,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.08);
}

/* ═══════════════════════════════
   2. GLOW & SHINE EFFECTS
   ═══════════════════════════════ */

/* Gradient border glow on hover */
.glow-card {
    position: relative;
    overflow: hidden;
    transition: transform 0.4s var(--transition-smooth),
                box-shadow 0.4s var(--transition-smooth);
}
.glow-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--glow-primary), var(--glow-accent), var(--glow-secondary));
    border-radius: inherit;
    opacity: 0;
    z-index: -1;
    transition: opacity 0.4s var(--transition-smooth);
}
.glow-card::after {
    content: '';
    position: absolute;
    inset: 1px;
    background: inherit;
    border-radius: inherit;
    z-index: -1;
}
.glow-card:hover::before {
    opacity: 1;
}
.glow-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(79,70,229,0.15);
}

/* Shimmer shine sweep effect */
.shimmer {
    position: relative;
    overflow: hidden;
}
.shimmer::after {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(255,255,255,0.15),
        transparent
    );
    transition: none;
    animation: none;
}
.shimmer:hover::after {
    animation: shimmer-sweep 0.8s ease-out;
}
@keyframes shimmer-sweep {
    0%   { left: -100%; }
    100% { left: 200%; }
}

/* Pulse glow ring */
.pulse-glow {
    animation: pulse-glow 2.5s ease-in-out infinite;
}
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(79,70,229,0.25); }
    50%      { box-shadow: 0 0 0 12px rgba(79,70,229,0); }
}

/* Gradient text shimmer */
.text-shimmer {
    background: linear-gradient(90deg, #4F46E5, #06B6D4, #7C3AED, #4F46E5);
    background-size: 300% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: text-shimmer 4s ease-in-out infinite;
}
@keyframes text-shimmer {
    0%, 100% { background-position: 0% 50%; }
    50%      { background-position: 100% 50%; }
}

/* ═══════════════════════════════
   3. SCROLL REVEAL ANIMATIONS
   ═══════════════════════════════ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--transition-smooth),
                transform 0.7s var(--transition-smooth);
}
.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.7s var(--transition-smooth),
                transform 0.7s var(--transition-smooth);
}
.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.7s var(--transition-smooth),
                transform 0.7s var(--transition-smooth);
}
.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.7s var(--transition-smooth),
                transform 0.7s var(--transition-smooth);
}
.reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* Stagger delay children */
.stagger > *:nth-child(1) { transition-delay: 0ms; }
.stagger > *:nth-child(2) { transition-delay: 80ms; }
.stagger > *:nth-child(3) { transition-delay: 160ms; }
.stagger > *:nth-child(4) { transition-delay: 240ms; }
.stagger > *:nth-child(5) { transition-delay: 320ms; }
.stagger > *:nth-child(6) { transition-delay: 400ms; }
.stagger > *:nth-child(7) { transition-delay: 480ms; }
.stagger > *:nth-child(8) { transition-delay: 560ms; }

/* ═══════════════════════════════
   4. BUTTON MICRO-INTERACTIONS
   ═══════════════════════════════ */

/* Gradient shine button */
.btn-shine {
    position: relative;
    overflow: hidden;
    transition: all 0.3s var(--transition-smooth);
}
.btn-shine::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255,255,255,0.25), transparent);
    transition: none;
}
.btn-shine:hover::before {
    animation: btn-shine 0.6s ease-out;
}
@keyframes btn-shine {
    0%   { left: -100%; }
    100% { left: 100%; }
}

/* Magnetic hover effect */
.btn-magnetic {
    transition: transform 0.2s var(--transition-smooth);
}
.btn-magnetic:hover {
    transform: scale(1.05);
}
.btn-magnetic:active {
    transform: scale(0.97);
}

/* Ripple effect */
.btn-ripple {
    position: relative;
    overflow: hidden;
}
.btn-ripple .ripple-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.35);
    transform: scale(0);
    animation: ripple-expand 0.6s ease-out;
    pointer-events: none;
}
@keyframes ripple-expand {
    to { transform: scale(4); opacity: 0; }
}

/* ═══════════════════════════════
   5. CARD EFFECTS
   ═══════════════════════════════ */

/* Tilt on hover (subtle) */
.card-tilt {
    transition: transform 0.3s var(--transition-smooth),
                box-shadow 0.3s var(--transition-smooth);
    will-change: transform;
}
.card-tilt:hover {
    transform: perspective(1000px) rotateX(2deg) rotateY(-2deg) translateY(-6px);
    box-shadow: 0 25px 50px rgba(0,0,0,0.1);
}

/* Border gradient on hover */
.card-gradient-border {
    position: relative;
    background: white;
    border: none !important;
}
.card-gradient-border::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 2px;
    background: linear-gradient(135deg, #4F46E5, #06B6D4, #7C3AED);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s var(--transition-smooth);
}
.card-gradient-border:hover::before {
    opacity: 1;
}

/* Floating animation */
.float-slow {
    animation: float-slow 6s ease-in-out infinite;
}
@keyframes float-slow {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33%      { transform: translateY(-8px) rotate(1deg); }
    66%      { transform: translateY(4px) rotate(-1deg); }
}

.float-medium {
    animation: float-medium 4s ease-in-out infinite;
}
@keyframes float-medium {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-12px); }
}

/* ═══════════════════════════════
   6. ANIMATED BACKGROUNDS
   ═══════════════════════════════ */

/* Mesh gradient animated */
.bg-mesh {
    background:
        radial-gradient(at 40% 20%, rgba(79,70,229,0.15) 0px, transparent 50%),
        radial-gradient(at 80% 0%, rgba(6,182,212,0.12) 0px, transparent 50%),
        radial-gradient(at 0% 50%, rgba(124,58,237,0.1) 0px, transparent 50%),
        radial-gradient(at 80% 50%, rgba(16,185,129,0.08) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(239,68,68,0.06) 0px, transparent 50%);
}

/* Gradient flow */
.bg-gradient-flow {
    background: linear-gradient(-45deg, #1E1B4B, #312E81, #4338CA, #6D28D9, #4F46E5);
    background-size: 400% 400%;
    animation: gradient-flow 15s ease infinite;
}
@keyframes gradient-flow {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Particle dots background */
.bg-dots {
    background-image: radial-gradient(rgba(79,70,229,0.15) 1px, transparent 1px);
    background-size: 24px 24px;
}

/* ═══════════════════════════════
   7. FORM ENHANCEMENTS
   ═══════════════════════════════ */
.form-control-glow:focus {
    border-color: #818CF8;
    box-shadow: 0 0 0 3px rgba(79,70,229,0.15), 0 4px 12px rgba(79,70,229,0.1);
    transition: all 0.3s var(--transition-smooth);
}

.form-floating-enhanced .form-control {
    border: 2px solid #E2E8F0;
    border-radius: 12px;
    transition: all 0.3s var(--transition-smooth);
}
.form-floating-enhanced .form-control:focus {
    border-color: #818CF8;
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1), 0 4px 16px rgba(79,70,229,0.08);
}

/* ═══════════════════════════════
   8. LOADING / SKELETON
   ═══════════════════════════════ */
.skeleton {
    background: linear-gradient(90deg, #F1F5F9 25%, #E2E8F0 50%, #F1F5F9 75%);
    background-size: 200% 100%;
    animation: skeleton-pulse 1.5s infinite;
    border-radius: 8px;
}
@keyframes skeleton-pulse {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ═══════════════════════════════
   9. ENHANCED SCROLLBAR
   ═══════════════════════════════ */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(79,70,229,0.2);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(79,70,229,0.4);
}

/* ═══════════════════════════════
   10. RESPONSIVE UTILITIES
   ═══════════════════════════════ */

/* Container max-widths override for larger screens */
@media (min-width: 1400px) {
    .container-xxl-custom { max-width: 1320px; }
}

/* Stack horizontal items vertically on mobile */
.flex-stack {
    display: flex;
    gap: 0.75rem;
}
@media (max-width: 576px) {
    .flex-stack {
        flex-direction: column;
    }
    .flex-stack > * {
        width: 100%;
    }
}

/* Hide on mobile, show on desktop */
.hide-mobile {
    display: block;
}
@media (max-width: 768px) {
    .hide-mobile { display: none !important; }
}

/* Show only on mobile */
.show-mobile {
    display: none !important;
}
@media (max-width: 768px) {
    .show-mobile { display: block !important; }
}

/* Text sizes responsive */
.text-responsive-xl {
    font-size: clamp(1.8rem, 4vw, 3.5rem);
}
.text-responsive-lg {
    font-size: clamp(1.4rem, 3vw, 2.5rem);
}
.text-responsive-md {
    font-size: clamp(1rem, 2vw, 1.5rem);
}

/* ═══════════════════════════════
   11. TRANSITION UTILITIES
   ═══════════════════════════════ */
.transition-all {
    transition: all 0.3s var(--transition-smooth);
}
.transition-fast {
    transition: all 0.15s var(--transition-smooth);
}
.transition-slow {
    transition: all 0.5s var(--transition-smooth);
}

/* ═══════════════════════════════
   12. COUNTER ANIMATION
   ═══════════════════════════════ */
.count-up {
    display: inline-block;
}

/* ═══════════════════════════════
   13. TOOLTIP GLOW
   ═══════════════════════════════ */
.tooltip-glow {
    position: relative;
}
.tooltip-glow::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: rgba(30,27,75,0.95);
    backdrop-filter: blur(8px);
    color: white;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s var(--transition-smooth);
}
.tooltip-glow:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}