/* ========= COLORS ========= */
:root {
    --blue:rgb(51, 142, 205);
    --blue2: rgb(51, 142, 205);
    --yellow: #dfcc8c;
    --dark: #202020;
    --white: #ffffff;

    /* Software cards colors */
    --html-color: #ff6f61;   /* Testing - coral */
    --css-color: #4caf50;    /* Development - green */
    --js-color: #f7df1e;     /* احتياطي لو حبيتي تضيفي كارت ثالث بعدين */
}

html {
    scroll-behavior: smooth;
}

/* ========= GENERAL ========= */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Poppins, Arial, sans-serif;
    background: linear-gradient(135deg, var(--blue) 0%, var(--blue2) 40%, var(--yellow) 100%);
    color: var(--white);
    cursor: url("pointer (4).png") 16 16, auto;
}

.header h1 {
    text-align: center;
    padding: 25px 0;
    font-size: 42px;
    text-shadow: 0 0 10px rgba(0,0,0,0.4);
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
}

/* ========= INTRO ========= */
.intro h2,
.section-title,
.social-section h3 {
    text-align: center;
}

.intro p {
    width: 80%;
    margin: 10px auto;
    text-align: center;
}

/* Fade Animation */
.fade-in { opacity: 0; animation: fade 2s forwards; }
.delay1 { animation-delay: .4s; }
.delay2 { animation-delay: .8s; }

@keyframes fade { to { opacity:1; } }

/* ========= CARDS ========= */
.cards-section {
    margin-top: 40px;
}

.cards-container {
    display: flex;
    justify-content: center;
    gap: 40px;        /* بعد بين الكروت */
    flex-wrap: wrap;
    margin-top: 25px;
    padding-bottom: 30px;
}

.card {
    width: 260px;
    height: 330px;
    perspective: 1000px;
    transition: transform .3s;
}

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

/* flip */
.card-inner {
    width: 100%;
    height: 100%;
    transition: transform .8s;
    transform-style: preserve-3d;
}

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

/* sides */
.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    backface-visibility: hidden;
    text-align: center;
    padding: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* front colors + glow (Testing / Development) */
.html-card .card-front {
    background: var(--html-color);
    color: white;
    box-shadow: 0 0 25px rgba(255,111,97,0.7);
}
.css-card .card-front {
    background: var(--css-color);
    color: white;
    box-shadow: 0 0 25px rgba(76,175,80,0.7);
}

/* icon logo animation */
.logo {
    font-size: 60px;
    margin-top: 10px;
    animation: floatLogo 3s infinite ease-in-out;
}

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

/* back side */
.card-back {
    background: var(--yellow);
    color:white;
    transform: rotateY(180deg);
    box-shadow: 0 0 18px rgba(0,0,0,0.4);
}

/* BUTTON */
.btn {
    background:var(--blue2);
    padding: 10px 25px;
    margin-top: 12px;
    border-radius: 10px;
    text-decoration: none;
    color:white;
    font-weight: bold;
}

/* ========= SOCIAL MEDIA ========= */
.social-section {
    margin-top: 50px;
    text-align: center;
    position: relative;
    z-index: 5; /* فوق الموجة */
}

.social-icons a {
    font-size: 26px;
    margin: 0 10px;
    color: var(--white);
    transition: .3s;
}

.social-icons a:hover {
    transform: scale(1.2);
    color: #000;
}

/* ========= WAVES ========= */
.wave-footer {
    margin-top: 200px;
    position: relative;
    height: 350px;
    overflow: hidden;
}

.waves {
    position: relative;
    width: 100%;
    height: 100%;
}

.wave {
    position: absolute;
    width: 180%;
    left: -30%;
}

/* wave color + movement */
.wave path {
    fill: rgba(255,255,255,0.7);
    animation: waveMove 8s ease-in-out infinite;
}

.wave2 path { animation-delay: 1.5s; opacity: .45; }
.wave3 path { animation-delay: 3s;   opacity: .30; }

@keyframes waveMove {
    0%   { transform: translateX(0) translateY(0); }
    50%  { transform: translateX(-50px) translateY(-12px); }
    100% { transform: translateX(0) translateY(0); }
}

/* ========= SCROLL TO TOP BUTTON ========= */
.scroll-top {
    position: fixed;
    right: 18px;
    bottom: 18px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0,0,0,0.6);
    color: white;
    text-decoration: none;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 22px;
    backdrop-filter: blur(4px);
}

/* ========= RESPONSIVE ========= */
@media (max-width: 768px) {
    .intro p {
        width: 90%;
        font-size: 16px;
    }

    .cards-container {
        gap: 20px;
    }

    .card {
        width: 230px;
        height: 310px;
    }

    .wave-footer {
        height: 60px;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 30px;
    }

    .section-title {
        font-size: 24px;
    }

    .wave-footer {
        height: 15px;
    }
}

/* ========= HOME BUTTON ========= */
.home-btn {
    position: fixed;
    top: 18px;
    left: 18px;
    width: 45px;
    height: 45px;
    background: rgba(255,255,255,0.85);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #000;
    font-size: 22px;
    text-decoration: none;
    box-shadow: 0 0 12px rgba(0,0,0,0.25);
    backdrop-filter: blur(3px);
    z-index: 9999;
    transition: 0.3s;
}

.home-btn:hover {
    transform: scale(1.12);
    background: white;
    box-shadow: 0 0 20px rgba(255,255,255,0.7);
}