/* ============================================
   PORTFOLIO - ANIMATION STYLESHEET
   Module 2: Animation System
   ============================================ */

/* ==========================================================
   1. KEYFRAMES
   ========================================================== */
@keyframes preloaderPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50%      { transform: scale(1.1); opacity: 0.7; }
}

@keyframes preloaderBar {
    0%   { width: 0%; }
    100% { width: 100%; }
}

@keyframes scrollWheel {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    80%      { transform: translateX(-50%) translateY(10px); opacity: 0; }
}

@keyframes gradientShift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes gradientFlow {
    0%   { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-15px); }
}

@keyframes floatSlow {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}

@keyframes floatReverse {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(10px); }
}

@keyframes floatX {
    0%, 100% { transform: translateX(0); }
    50%      { transform: translateX(12px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50%      { transform: scale(1.05); opacity: 0.8; }
}

@keyframes pulseRing {
    0%   { transform: scale(0.9); opacity: 0.8; }
    100% { transform: scale(1.6); opacity: 0; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px var(--primary-glow); }
    50%      { box-shadow: 0 0 20px var(--primary-glow), 0 0 40px var(--primary-glow); }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

@keyframes rotateReverse {
    from { transform: rotate(360deg); }
    to   { transform: rotate(0deg); }
}

@keyframes blink {
    0%, 50%   { opacity: 1; }
    51%, 100% { opacity: 0; }
}

@keyframes shimmer {
    0%   { background-position: -200% center; }
    100% { background-position: 200% center; }
}

@keyframes borderGlow {
    0%, 100% { border-color: var(--primary-glow); }
    50%      { border-color: var(--primary); }
}

@keyframes heartBeat {
    0%, 100% { transform: scale(1); }
    25%      { transform: scale(1.15); }
    40%      { transform: scale(1); }
    60%      { transform: scale(1.1); }
}

@keyframes spinnerRotate {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

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

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

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

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-40px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(40px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.85); }
    to   { opacity: 1; transform: scale(1); }
}

@keyframes zoomOut {
    from { opacity: 0; transform: scale(1.15); }
    to   { opacity: 1; transform: scale(1); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-100%); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%      { transform: translateX(-10px); }
    40%      { transform: translateX(10px); }
    60%      { transform: translateX(-6px); }
    80%      { transform: translateX(6px); }
}

@keyframes popIn {
    0%   { opacity: 0; transform: scale(0.6); }
    70%  { transform: scale(1.05); }
    100% { opacity: 1; transform: scale(1); }
}

@keyframes bounceDown {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(8px); }
}

@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    20%      { transform: rotate(15deg); }
    40%      { transform: rotate(-10deg); }
    60%      { transform: rotate(8deg); }
    80%      { transform: rotate(-4deg); }
}

/* ==========================================================
   2. SCROLL REVEAL SYSTEM
   ========================================================== */
.reveal,
.reveal-left,
.reveal-right,
.reveal-scale,
.reveal-up {
    opacity: 0;
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
    transition-delay: var(--reveal-delay, 0s);
    will-change: opacity, transform;
}

.reveal,
.reveal-up          { transform: translateY(40px); }
.reveal-left        { transform: translateX(-50px); }
.reveal-right       { transform: translateX(50px); }
.reveal-scale       { transform: scale(0.88); }

.reveal.revealed,
.reveal-left.revealed,
.reveal-right.revealed,
.reveal-scale.revealed,
.reveal-up.revealed {
    opacity: 1;
    transform: none;
}

/* Reveal directions via modifier */
.reveal-from-top    { transform: translateY(-40px); }
.reveal-from-bottom { transform: translateY(40px); }
.reveal-from-left   { transform: translateX(-50px); }
.reveal-from-right  { transform: translateX(50px); }
.reveal-zoom        { transform: scale(0.85); }

/* ----------------------------------------
   STAGGER DELAYS
   ---------------------------------------- */
.stagger-1 { --reveal-delay: 0.1s; }
.stagger-2 { --reveal-delay: 0.2s; }
.stagger-3 { --reveal-delay: 0.3s; }
.stagger-4 { --reveal-delay: 0.4s; }
.stagger-5 { --reveal-delay: 0.5s; }
.stagger-6 { --reveal-delay: 0.6s; }
.stagger-7 { --reveal-delay: 0.7s; }
.stagger-8 { --reveal-delay: 0.8s; }
.stagger-9 { --reveal-delay: 0.9s; }
.stagger-10 { --reveal-delay: 1s; }

/* ----------------------------------------
   CSS-ONLY ENTRANCE (page load, no JS)
   ---------------------------------------- */
.animate-fade-in-up   { animation: fadeInUp 0.7s var(--ease-out) both; }
.animate-fade-in      { animation: fadeIn 0.7s var(--ease-out) both; }
.animate-fade-in-down { animation: fadeInDown 0.7s var(--ease-out) both; }
.animate-fade-in-left { animation: fadeInLeft 0.7s var(--ease-out) both; }
.animate-fade-in-right{ animation: fadeInRight 0.7s var(--ease-out) both; }
.animate-zoom-in      { animation: zoomIn 0.6s var(--ease-spring) both; }
.animate-zoom-out     { animation: zoomOut 0.6s var(--ease-out) both; }
.animate-pop-in       { animation: popIn 0.5s var(--ease-spring) both; }
.animate-bounce-down  { animation: bounceDown 1.6s ease-in-out infinite; }
.animate-wave         { animation: wave 1.8s ease-in-out infinite; transform-origin: 70% 70%; }

/* ==========================================================
   3. LOOPING UTILITY ANIMATIONS
   ========================================================== */
.animate-float          { animation: float 6s ease-in-out infinite; }
.animate-float-slow     { animation: floatSlow 8s ease-in-out infinite; }
.animate-float-reverse  { animation: floatReverse 7s ease-in-out infinite; }
.animate-float-x        { animation: floatX 5s ease-in-out infinite; }
.animate-gradient       { background-size: 300% 300%; animation: gradientShift 5s ease infinite; }
.animate-gradient-flow  { background-size: 200% auto; animation: gradientFlow 6s ease-in-out infinite; }
.animate-pulse          { animation: pulse 2s ease-in-out infinite; }
.animate-glow           { animation: glow 3s ease-in-out infinite; }
.animate-rotate         { animation: rotate 20s linear infinite; }
.animate-rotate-reverse { animation: rotateReverse 20s linear infinite; }
.animate-rotate-slow    { animation: rotate 40s linear infinite; }
.animate-shake          { animation: shake 0.5s var(--ease-in-out); }
.animate-border         { animation: borderGlow 3s ease-in-out infinite; }
.animate-heartbeat      { animation: heartBeat 1.6s ease-in-out infinite; }

/* Spinner (standalone) */
.spinner {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-round);
    border: 2px solid rgba(var(--primary-rgb), 0.25);
    border-top-color: var(--primary);
    animation: spinnerRotate 0.6s linear infinite;
}

.spinner.spinner-lg { width: 32px; height: 32px; border-width: 3px; }
.spinner.spinner-white { border-color: rgba(255, 255, 255, 0.3); border-top-color: #fff; }

/* Pulse ring dot */
.pulse-dot {
    position: relative;
    width: 12px;
    height: 12px;
}

.pulse-dot::before,
.pulse-dot::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-round);
    background: var(--success);
}

.pulse-dot::after {
    animation: pulseRing 1.6s ease-out infinite;
}

/* Text shimmer */
.text-shimmer {
    background: linear-gradient(
        90deg,
        var(--text-primary) 0%,
        var(--primary-light) 25%,
        var(--text-primary) 50%,
        var(--primary-light) 75%,
        var(--text-primary) 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 5s linear infinite;
}

/* Typing cursor */
.typing-cursor::after {
    content: '|';
    color: var(--primary-light);
    animation: blink 1s step-end infinite;
    margin-left: 2px;
}

/* ==========================================================
   4. HOVER EFFECTS
   ========================================================== */

/* Lift */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

/* Grow */
.hover-grow {
    transition: transform var(--transition-spring);
}

.hover-grow:hover {
    transform: scale(1.06);
}

/* Shrink */
.hover-shrink {
    transition: transform var(--transition-spring);
}

.hover-shrink:hover {
    transform: scale(0.94);
}

/* Glow */
.hover-glow {
    transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

/* Gradient sweep */
.hover-gradient {
    position: relative;
    z-index: 0;
}

.hover-gradient::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.hover-gradient:hover::after {
    opacity: 1;
}

/* Shine sweep (like .btn-shine but reusable) */
.hover-shine {
    position: relative;
    overflow: hidden;
}

.hover-shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-25deg);
    transition: left var(--duration-slow) var(--ease-out);
    z-index: 1;
    pointer-events: none;
}

.hover-shine:hover::before {
    left: 160%;
}

/* Rotate */
.hover-rotate {
    transition: transform var(--transition-spring);
}

.hover-rotate:hover {
    transform: rotate(-8deg) scale(1.05);
}

/* Tilt */
.hover-tilt {
    transition: transform var(--transition-base);
}

.hover-tilt:hover {
    transform: perspective(600px) rotateX(4deg) rotateY(-4deg);
}

/* Underline sweep */
.hover-underline {
    position: relative;
}

.hover-underline::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-pill);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--duration-base) var(--ease-out);
}

.hover-underline:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Border glow */
.hover-border {
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.hover-border:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}

/* Image zoom wrapper */
.hover-zoom {
    overflow: hidden;
}

.hover-zoom img {
    transition: transform var(--duration-slow) var(--ease-out);
}

.hover-zoom:hover img {
    transform: scale(1.08);
}

/* ==========================================================
   5. TRANSITION UTILITIES
   ========================================================== */
.transition-fast   { transition: var(--transition-fast); }
.transition-base   { transition: var(--transition-base); }
.transition-slow   { transition: var(--transition-slow); }
.transition-spring { transition: var(--transition-spring); }
.transition-colors { transition: color var(--transition-base), background-color var(--transition-base), border-color var(--transition-base); }
.transition-transform { transition: transform var(--transition-base); }

/* ==========================================================
   6. DURATION OVERRIDES
   ========================================================== */
.duration-100 { transition-duration: 0.1s !important; animation-duration: 0.1s !important; }
.duration-200 { transition-duration: 0.2s !important; animation-duration: 0.2s !important; }
.duration-300 { transition-duration: 0.3s !important; animation-duration: 0.3s !important; }
.duration-500 { transition-duration: 0.5s !important; animation-duration: 0.5s !important; }
.duration-800 { transition-duration: 0.8s !important; animation-duration: 0.8s !important; }
.duration-1000 { transition-duration: 1s !important; animation-duration: 1s !important; }

/* Delay overrides */
.delay-100  { animation-delay: 0.1s; }
.delay-200  { animation-delay: 0.2s; }
.delay-300  { animation-delay: 0.3s; }
.delay-400  { animation-delay: 0.4s; }
.delay-500  { animation-delay: 0.5s; }
.delay-1000 { animation-delay: 1s; }

/* ==========================================================
   7. REDUCED MOTION
   ========================================================== */
@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal-left,
    .reveal-right,
    .reveal-scale,
    .reveal-up,
    .reveal-from-top,
    .reveal-from-bottom,
    .reveal-from-left,
    .reveal-from-right,
    .reveal-zoom {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .animate-float,
    .animate-float-slow,
    .animate-float-reverse,
    .animate-float-x,
    .animate-gradient,
    .animate-gradient-flow,
    .animate-pulse,
    .animate-glow,
    .animate-rotate,
    .animate-rotate-reverse,
    .animate-rotate-slow,
    .animate-border,
    .animate-heartbeat,
    .animate-bounce-down,
    .animate-wave,
    .text-shimmer {
        animation: none;
    }

    .btn-whatsapp-float::before {
        animation: none;
    }

    .hover-lift:hover,
    .hover-grow:hover,
    .hover-shrink:hover,
    .hover-rotate:hover,
    .hover-tilt:hover {
        transform: none;
    }

    .nav-drawer {
        transition: none;
    }

    .nav-drawer .nav-item,
    .nav-drawer .nav-cta {
        transition: none;
        opacity: 1;
        transform: none;
    }
}