*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --pink:        #f81562;
    --yellow:      #fdef03;
    --cyan:        #5df6fe;
    --border-size: 5px;
    --ease:        0.3s ease;
}

html, body {
    height: 100%;
    background: #000;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   INTRO OVERLAY
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

.intro-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(0, 0, 0, 0.93);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

.intro-overlay.fade-out {
    opacity: 0;
    pointer-events: none;
}

.intro-box {
    text-align: center;
    max-width: 560px;
    width: 90%;
    padding: 3rem 2.5rem;
    position: relative;
    background: rgba(0, 0, 0, 0.85);
    border: 1px solid rgba(248, 21, 98, 0.3);
}

/* Corner accents */
.intro-box::before,
.intro-box::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-style: solid;
    border-color: var(--pink);
}

.intro-box::before {
    top: -2px;
    left: -2px;
    border-width: 2px 0 0 2px;
}

.intro-box::after {
    bottom: -2px;
    right: -2px;
    border-width: 0 2px 2px 0;
}

.intro-label {
    font-size: 0.7rem;
    letter-spacing: 0.5em;
    text-transform: uppercase;
    color: var(--pink);
    margin-bottom: 1rem;
}

.intro-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 300;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #fff;
    margin-bottom: 1.5rem;
}

.intro-divider {
    width: 50px;
    height: 1px;
    background: var(--pink);
    margin: 0 auto 1.5rem;
}

.intro-body {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.intro-enter {
    background: transparent;
    border: 1px solid var(--pink);
    color: var(--pink);
    padding: 0.65rem 2.75rem;
    font-size: 0.75rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background var(--ease), color var(--ease);
}

.intro-enter:hover {
    background: var(--pink);
    color: #000;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   SECTIONS LAYOUT
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

.sections {
    display: flex;
    height: 100vh;
    width: 100%;
}

.section {
    position: relative;
    flex: 1;
    overflow: hidden;
    text-decoration: none;
    background: #000;
    border-left:  var(--border-size) solid var(--pink);
    border-right: var(--border-size) solid var(--pink);
    transition: border-color var(--ease);
    z-index: 0;
}

/* Collapse the shared border between adjacent sections */
.section + .section {
    margin-left: calc(-1 * var(--border-size));
}

.section:hover {
    border-color: var(--yellow);
    z-index: 1;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   BACKGROUND IMAGES
   Replace the gradient values below with:
   background-image: url('../images/your-image.jpg');
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

.section-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.7;
    transition: transform 0.6s ease;
}

.section:hover .section-bg {
    transform: scale(1.04);
}

#sec-gamedev .section-bg {
    background:
        repeating-linear-gradient(0deg,   transparent, transparent 39px, rgba(140, 40, 255, 0.12) 40px),
        repeating-linear-gradient(90deg,  transparent, transparent 39px, rgba(140, 40, 255, 0.12) 40px),
        radial-gradient(ellipse at 50% 40%, #2a0d52 0%, #08000f 70%);
}

#sec-softdev .section-bg {
    background:
        repeating-linear-gradient(0deg, rgba(0, 255, 80, 0.07) 0px, transparent 1px, transparent 22px),
        radial-gradient(ellipse at 50% 60%, #072a10 0%, #000902 70%);
}

#sec-uiux .section-bg {
    background:
        radial-gradient(circle at 25% 55%, rgba(230, 0, 180, 0.22) 0%, transparent 50%),
        radial-gradient(circle at 75% 45%, rgba(60, 0, 240, 0.22) 0%, transparent 50%),
        radial-gradient(circle at 50% 15%, rgba(0, 180, 255, 0.12) 0%, transparent 40%),
        #04000e;
}

#sec-content .section-bg {
    background:
        repeating-linear-gradient(
            90deg,
            rgba(255, 130, 0, 0.06) 0px,
            rgba(255, 130, 0, 0.06) 2px,
            transparent 2px,
            transparent 44px
        ),
        radial-gradient(ellipse at 50% 50%, #271000 0%, #040100 70%);
}

#sec-about .section-bg {
    background:
        radial-gradient(ellipse at 50% 40%, #001827 0%, #000a0f 70%),
        repeating-linear-gradient(135deg, rgba(0, 180, 255, 0.05) 0px, transparent 1px, transparent 30px);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   HOVER GRADIENT OVERLAY
   top: 50% opacity → bottom: fully transparent
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

.section-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(253, 239, 3, 0.5) 0%,
        rgba(253, 239, 3, 0)   100%
    );
    opacity: 0;
    transition: opacity var(--ease);
    pointer-events: none;
    z-index: 1;
}

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

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   SECTION CONTENT  (icon + title)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

.section-inner {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.1rem;
    padding: 1rem;
}

.section-icon {
    width: 52px;
    height: 52px;
    fill: var(--pink);
    flex-shrink: 0;
    transition: fill var(--ease);
    filter: drop-shadow(0 0 6px transparent);
}

.section-title {
    font-size: clamp(0.65rem, 1.3vw, 1.1rem);
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--pink);
    text-align: center;
    transition: color var(--ease), text-shadow var(--ease);
}

.section:hover .section-icon {
    fill: var(--cyan);
    filter: drop-shadow(0 0 8px rgba(93, 246, 254, 0.5));
}

.section:hover .section-title {
    color: var(--cyan);
    text-shadow: 0 0 12px rgba(93, 246, 254, 0.4);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   RESPONSIVE — stack vertically on small screens
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

@media (max-width: 640px) {
    html, body {
        overflow-y: auto;
    }

    .sections {
        flex-direction: column;
        height: auto;
    }

    .section {
        height: 25vh;
        min-height: 130px;
        border-top:    var(--border-size) solid var(--pink);
        border-bottom: var(--border-size) solid var(--pink);
        border-left:   var(--border-size) solid var(--pink);
        border-right:  var(--border-size) solid var(--pink);
    }

    .section + .section {
        margin-left: 0;
        margin-top: calc(-1 * var(--border-size));
    }

    .section-icon {
        width: 36px;
        height: 36px;
    }
}