/* ═══════════════════════════════════════════
   ADVANCED ANIMATIONS STYLES
   Islam El-Nashar Portfolio — Animation CSS
   ═══════════════════════════════════════════ */

/* ─────────────────────────────────────────
   1. SCROLL PROGRESS BAR
   ───────────────────────────────────────── */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-l) 100%);
    box-shadow: 0 0 10px var(--accent-glow);
    z-index: 10000;
    transition: width 0.1s ease-out;
    width: 0;
}

/* ─────────────────────────────────────────
   2. CUSTOM CURSOR
   ───────────────────────────────────────── */
.custom-cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease, border-color 0.3s ease;
    mix-blend-mode: difference;
}

.custom-cursor.cursor-hover {
    width: 40px;
    height: 40px;
    border-color: var(--accent-l);
}

.custom-cursor-glow {
    position: fixed;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: width 0.5s ease, height 0.5s ease;
    filter: blur(40px);
    opacity: 0.3;
}

.custom-cursor-glow.cursor-hover {
    width: 300px;
    height: 300px;
    opacity: 0.5;
}

/* Hide on touch devices */
@media (hover: none) and (pointer: coarse) {
    .custom-cursor,
    .custom-cursor-glow {
        display: none;
    }
}

/* ─────────────────────────────────────────
   3. RIPPLE EFFECT
   ───────────────────────────────────────── */
.ripple-effect {
    position: fixed;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-l) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 9997;
    animation: ripple-expand 1s ease-out forwards;
}

@keyframes ripple-expand {
    0% {
        width: 20px;
        height: 20px;
        opacity: 1;
    }
    100% {
        width: 300px;
        height: 300px;
        opacity: 0;
    }
}

/* ─────────────────────────────────────────
   4. HERO CANVAS BACKGROUND
   ───────────────────────────────────────── */
.hero__canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.4;
    pointer-events: none;
}

/* ─────────────────────────────────────────
   5. ENHANCED LOGO ANIMATIONS
   ───────────────────────────────────────── */
.logo-hex {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2;
    animation: logo-hex-pulse 3s ease-in-out infinite;
    transform-origin: center;
}

@keyframes logo-hex-pulse {
    0%,
    100% {
        stroke-width: 2;
        opacity: 0.8;
    }
    50% {
        stroke-width: 3;
        opacity: 1;
    }
}

.logo-core {
    fill: var(--accent);
    animation: logo-core-beat 2s ease-in-out infinite;
    transform-origin: center;
}

@keyframes logo-core-beat {
    0%,
    100% {
        r: 12;
        opacity: 0.8;
    }
    50% {
        r: 14;
        opacity: 1;
    }
}

.logo-bracket-left,
.logo-bracket-right {
    fill: none;
    stroke: var(--accent-l);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    animation: logo-bracket-glow 2.5s ease-in-out infinite;
}

.logo-bracket-right {
    animation-delay: 0.5s;
}

@keyframes logo-bracket-glow {
    0%,
    100% {
        opacity: 0.6;
        filter: drop-shadow(0 0 3px var(--accent));
    }
    50% {
        opacity: 1;
        filter: drop-shadow(0 0 8px var(--accent-l));
    }
}

.logo-orbit {
    fill: var(--accent-l);
    filter: drop-shadow(0 0 5px var(--accent-glow));
    animation: logo-orbit-pulse 2s ease-in-out infinite;
}

@keyframes logo-orbit-pulse {
    0%,
    100% {
        r: 5;
        opacity: 0.8;
    }
    50% {
        r: 6;
        opacity: 1;
    }
}

/* Hover effect on nav logo */
.nav__logo:hover .logo-hex {
    stroke: var(--accent-l);
    animation-duration: 1s;
}

.nav__logo:hover .logo-core {
    fill: var(--white);
    animation-duration: 1s;
}

/* ─────────────────────────────────────────
   6. ACTIVE NAVIGATION LINK INDICATOR
   ───────────────────────────────────────── */
.nav__link.active {
    color: var(--white);
}

.nav__link.active::after {
    width: 100%;
    box-shadow: 0 0 10px var(--accent-glow);
}

/* ─────────────────────────────────────────
   7. SHIMMER ANIMATION FOR LOADING
   ───────────────────────────────────────── */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
        opacity: 0.4;
    }
    50% {
        opacity: 0.6;
    }
    100% {
        background-position: 200% 0;
        opacity: 0.4;
    }
}

/* ─────────────────────────────────────────
   8. FLIP CARD ANIMATION (for future use)
   ───────────────────────────────────────── */
.flip-card {
    perspective: 1000px;
    position: relative;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
}

.flip-card-back {
    transform: rotateY(180deg);
}

/* ─────────────────────────────────────────
   9. ENHANCED SKILL CARD HOVER EFFECTS
   ───────────────────────────────────────── */
.skill-card {
    position: relative;
    overflow: hidden;
}

.skill-card::after {
    content: "";
    position: absolute;
    inset: -2px;
    background: linear-gradient(
        45deg,
        transparent 30%,
        var(--accent-glow) 50%,
        transparent 70%
    );
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
    animation: skill-shimmer 3s linear infinite;
    animation-play-state: paused;
}

@keyframes skill-shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.skill-card:hover::after {
    opacity: 1;
    animation-play-state: running;
}

/* ─────────────────────────────────────────
   10. MAGNETIC PROJECT CARDS
   ───────────────────────────────────────── */
.project-card {
    transition: transform 0.1s ease-out, border-color 0.3s ease, box-shadow 0.3s ease;
    will-change: transform;
}

.project-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(
        circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        var(--accent-glow) 0%,
        transparent 50%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    border-radius: var(--radius);
}

.project-card:hover::before {
    opacity: 1;
}

/* ─────────────────────────────────────────
   11. TEXT SPLIT ANIMATION
   ───────────────────────────────────────── */
.text-split {
    display: inline-block;
    overflow: hidden;
}

.text-split span {
    display: inline-block;
    animation: text-slide-up 0.8s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

@keyframes text-slide-up {
    0% {
        transform: translateY(100%);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Stagger delays for each character */
.text-split span:nth-child(1) {
    animation-delay: 0.05s;
}
.text-split span:nth-child(2) {
    animation-delay: 0.1s;
}
.text-split span:nth-child(3) {
    animation-delay: 0.15s;
}
.text-split span:nth-child(4) {
    animation-delay: 0.2s;
}
.text-split span:nth-child(5) {
    animation-delay: 0.25s;
}

/* ─────────────────────────────────────────
   12. ENHANCED BUTTON ANIMATIONS
   ───────────────────────────────────────── */
.btn {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn--primary {
    box-shadow: 0 0 20px var(--accent-glow), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn--primary:hover {
    animation: btn-pulse 1.5s ease-in-out infinite;
}

@keyframes btn-pulse {
    0%,
    100% {
        box-shadow: 0 0 20px var(--accent-glow), 0 8px 32px var(--accent-glow);
    }
    50% {
        box-shadow: 0 0 40px var(--accent-glow), 0 12px 48px var(--accent-glow);
    }
}

/* ─────────────────────────────────────────
   13. SECTION TITLE ANIMATION
   ───────────────────────────────────────── */
.section__title {
    animation: title-slide-in 0.8s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

@keyframes title-slide-in {
    0% {
        transform: translateX(-50px);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

.section__title::after {
    animation: title-line-grow 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.3s backwards;
}

@keyframes title-line-grow {
    0% {
        width: 0;
    }
    100% {
        width: 48px;
    }
}

/* ─────────────────────────────────────────
   14. GITHUB STATS CARD ANIMATIONS
   ───────────────────────────────────────── */
.github-activity-chart {
    position: relative;
}

.github-activity-chart__img,
.github-activity-chart__graph {
    border-radius: var(--radius);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.github-activity-chart__img:hover,
.github-activity-chart__graph:hover {
    transform: scale(1.02) translateY(-4px);
    box-shadow: 0 16px 48px rgba(114, 47, 55, 0.2);
}

/* ─────────────────────────────────────────
   15. OSS CARD ENTRANCE ANIMATION
   ───────────────────────────────────────── */
.oss-card {
    position: relative;
    overflow: hidden;
}

.oss-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    animation: oss-line-sweep 2s ease-in-out infinite;
}

@keyframes oss-line-sweep {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.oss-card:hover::before {
    animation-duration: 1s;
}

/* ─────────────────────────────────────────
   16. CONTACT CARD ADVANCED ANIMATIONS
   ───────────────────────────────────────── */
.contact-card {
    position: relative;
    overflow: hidden;
}

.contact-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        transparent 0%,
        var(--accent-glow) 50%,
        transparent 100%
    );
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.contact-card:hover::after {
    opacity: 0.1;
}

/* ─────────────────────────────────────────
   17. FOOTER IDENTITY BADGE ANIMATION
   ───────────────────────────────────────── */
.footer-identity {
    animation: identity-float 3s ease-in-out infinite;
}

@keyframes identity-float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

/* ─────────────────────────────────────────
   18. ABOUT STATS PULSE ANIMATION
   ───────────────────────────────────────── */
.about__stat:hover .about__stat-number {
    animation: stat-pulse 0.6s ease-in-out;
}

@keyframes stat-pulse {
    0%,
    100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.15);
    }
}

/* ─────────────────────────────────────────
   19. HERO SCROLL INDICATOR ENHANCED
   ───────────────────────────────────────── */
.hero__scroll-indicator {
    animation: indicator-bounce 2s ease-in-out infinite;
}

@keyframes indicator-bounce {
    0%,
    100% {
        transform: translate(-50%, 0);
    }
    50% {
        transform: translate(-50%, 10px);
    }
}

/* ─────────────────────────────────────────
   20. PAGE TRANSITIONS
   ───────────────────────────────────────── */
body {
    animation: page-fade-in 0.5s ease-out;
}

@keyframes page-fade-in {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

/* ─────────────────────────────────────────
   21. MOBILE MENU ANIMATION
   ───────────────────────────────────────── */
@media (max-width: 768px) {
    .nav__links.open .nav__link {
        animation: mobile-link-slide 0.5s cubic-bezier(0.4, 0, 0.2, 1) backwards;
    }

    @keyframes mobile-link-slide {
        0% {
            transform: translateX(-30px);
            opacity: 0;
        }
        100% {
            transform: translateX(0);
            opacity: 1;
        }
    }

    .nav__links.open .nav__link:nth-child(1) {
        animation-delay: 0.1s;
    }
    .nav__links.open .nav__link:nth-child(2) {
        animation-delay: 0.15s;
    }
    .nav__links.open .nav__link:nth-child(3) {
        animation-delay: 0.2s;
    }
    .nav__links.open .nav__link:nth-child(4) {
        animation-delay: 0.25s;
    }
    .nav__links.open .nav__link:nth-child(5) {
        animation-delay: 0.3s;
    }
}

/* ─────────────────────────────────────────
   22. PERFORMANCE OPTIMIZATIONS
   ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .custom-cursor,
    .custom-cursor-glow,
    .ripple-effect,
    .scroll-progress {
        display: none !important;
    }
}

/* Hardware acceleration */
.skill-card,
.project-card,
.btn,
.nav__link,
.hero__image {
    transform: translateZ(0);
    backface-visibility: hidden;
    will-change: transform;
}

/* ─────────────────────────────────────────
   23. LOADING STATES
   ───────────────────────────────────────── */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spinner-rotate 1s linear infinite;
}

@keyframes spinner-rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* ─────────────────────────────────────────
   24. GLOW EFFECTS
   ───────────────────────────────────────── */
.glow {
    filter: drop-shadow(0 0 10px var(--accent-glow));
    animation: glow-pulse 2s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%,
    100% {
        filter: drop-shadow(0 0 10px var(--accent-glow));
    }
    50% {
        filter: drop-shadow(0 0 20px var(--accent-glow)) drop-shadow(0 0 30px var(--accent-glow));
    }
}

/* ═══════════════════════════════════════════
   END OF ANIMATIONS
   ═══════════════════════════════════════════ */