/* ========== REF PAGE HERO ========== */
.ref-hero {
    padding: 180px 0 100px;
    text-align: center;
    background: linear-gradient(160deg, #060a14 0%, #0d1b3e 35%, #0a0f2e 65%, #060a14 100%);
    position: relative;
    overflow: hidden;
}
.ref-hero .hero-orbs { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.ref-hero .orb {
    position: absolute; border-radius: 50%;
    filter: blur(100px); will-change: transform;
}
.ref-hero .orb-1 {
    width: 500px; height: 500px; top: -15%; left: -10%;
    background: rgba(30,144,255,0.1);
    animation: orbFloat1 15s ease-in-out infinite;
}
.ref-hero .orb-2 {
    width: 400px; height: 400px; bottom: -15%; right: -10%;
    background: rgba(168,85,247,0.08);
    animation: orbFloat2 18s ease-in-out infinite;
}
.ref-hero .orb-3 {
    width: 300px; height: 300px; top: 30%; right: 20%;
    background: rgba(0,212,255,0.05);
    animation: orbFloat3 20s ease-in-out infinite;
}
@keyframes orbFloat1 {
    0%,100% { transform: translate(0, 0); }
    50% { transform: translate(80px, 60px); }
}
@keyframes orbFloat2 {
    0%,100% { transform: translate(0, 0); }
    50% { transform: translate(-60px, -50px); }
}
@keyframes orbFloat3 {
    0%,100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-40px, 30px) scale(1.1); }
}
.ref-hero::after {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 120px;
    background: linear-gradient(to top, #060a14, transparent);
    pointer-events: none;
}
.ref-hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 900;
    color: #fff;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
    letter-spacing: -1px;
}
.ref-hero .gradient-text {
    background: linear-gradient(135deg, #1e90ff, #00d4ff, #a855f7);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.ref-hero p {
    color: rgba(255,255,255,0.5);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    line-height: 1.8;
}

/* ========== PORTFOLIO SECTION ========== */
.portfolio-section {
    padding: 100px 0;
}
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
}

/* ========== PORTFOLIO CARD (Premium) ========== */
.portfolio-card {
    background: rgba(255,255,255,0.025);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 22px;
    padding: 36px 30px;
    transition: transform 0.4s cubic-bezier(.25,.46,.45,.94), border-color 0.4s, box-shadow 0.4s, background 0.4s;
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.portfolio-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, #1e90ff, #a855f7, #00d4ff);
    opacity: 0; transition: opacity 0.4s;
}
.portfolio-card:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.045);
    border-color: rgba(30,144,255,0.2);
    box-shadow: 0 25px 60px rgba(0,0,0,0.35), 0 0 40px rgba(30,144,255,0.04);
}
.portfolio-card:hover::before { opacity: 1; }

.portfolio-card-icon {
    width: 68px; height: 68px; border-radius: 18px;
    background: linear-gradient(135deg, rgba(30,144,255,0.12), rgba(168,85,247,0.06));
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; color: #1e90ff; margin-bottom: 22px;
    transition: transform 0.4s, box-shadow 0.4s, color 0.4s;
}
.portfolio-card:hover .portfolio-card-icon {
    transform: scale(1.1);
    color: #00d4ff;
    box-shadow: 0 6px 20px rgba(30,144,255,0.15);
}
.portfolio-card h3 {
    font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; color: #fff;
    transition: color 0.3s;
}
.portfolio-card:hover h3 { color: #00d4ff; }
.portfolio-tag {
    display: inline-flex; align-items: center; gap: 6px;
    background: rgba(30,144,255,0.08);
    color: #1e90ff; font-size: 0.78rem; font-weight: 600;
    padding: 5px 14px; border-radius: 20px;
    margin-bottom: 14px; width: fit-content;
    border: 1px solid rgba(30,144,255,0.1);
    transition: background 0.3s, border-color 0.3s;
}
.portfolio-card:hover .portfolio-tag {
    background: rgba(30,144,255,0.12);
    border-color: rgba(30,144,255,0.2);
}
.portfolio-tag i { font-size: 0.72rem; }
.portfolio-card p {
    color: rgba(255,255,255,0.48); font-size: 0.92rem;
    line-height: 1.75; margin-bottom: 22px; flex: 1;
}
.portfolio-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 22px; border-radius: 50px;
    background: rgba(30,144,255,0.08);
    border: 1px solid rgba(30,144,255,0.15);
    color: #1e90ff; font-weight: 600; font-size: 0.88rem;
    transition: all 0.3s; width: fit-content;
}
.portfolio-btn i { transition: transform 0.3s; font-size: 0.82rem; }
.portfolio-btn:hover {
    background: rgba(30,144,255,0.15);
    border-color: rgba(30,144,255,0.3);
    color: #00d4ff;
    transform: translateX(4px);
}
.portfolio-btn:hover i { transform: translateX(4px); }

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}
@media (max-width: 768px) {
    .ref-hero {
        padding: 130px 0 70px;
    }
    .ref-hero .orb { display: none; }
    .portfolio-section {
        padding: 70px 0;
    }
}
@media (max-width: 480px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    .ref-hero {
        padding: 110px 0 50px;
    }
    .ref-hero h1 { font-size: clamp(1.6rem, 5vw, 2.2rem); }
}