/* ==========================================================================
   SKYFALL V3 - EXPERTISE SECTION
   ========================================================================== */
.expertise-section {
    background: linear-gradient(180deg, #000000 0%, #0a0a0a 50%, #000000 100%);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.expertise-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(234, 88, 12, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.expertise-header {
    position: relative;
    z-index: 1;
}

/* Grid Container */
.expertise-grid-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 60px 80px;
    max-width: 1400px;
    width: 100%;
    align-items: center;
    position: relative;
    margin: 0 auto;
    padding: 0 24px;
}

/* Center Lines */
.expertise-center-lines {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.expertise-line-horizontal {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(234, 88, 12, 0.1) 15%,
        rgba(234, 88, 12, 0.3) 35%,
        transparent 48%,
        transparent 52%,
        rgba(234, 88, 12, 0.3) 65%,
        rgba(234, 88, 12, 0.1) 85%,
        transparent 100%);
    transform: translateY(-50%);
    opacity: 0;
}

.expertise-line-vertical {
    position: absolute;
    left: 50%;
    top: 0;
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg,
        transparent 0%,
        rgba(234, 88, 12, 0.1) 15%,
        rgba(234, 88, 12, 0.3) 35%,
        transparent 48%,
        transparent 52%,
        rgba(234, 88, 12, 0.3) 65%,
        rgba(234, 88, 12, 0.1) 85%,
        transparent 100%);
    transform: translateX(-50%);
    opacity: 0;
}

/* Glowing Dots */
.expertise-line-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #EA580C;
    border-radius: 50%;
    box-shadow: 0 0 10px #EA580C, 0 0 20px rgba(234, 88, 12, 0.5);
    opacity: 0;
    transform: scale(0);
}

.expertise-dot-top { top: 15%; left: 50%; transform: translate(-50%, -50%); }
.expertise-dot-bottom { bottom: 15%; left: 50%; transform: translate(-50%, 50%); }
.expertise-dot-left { left: 15%; top: 50%; transform: translate(-50%, -50%); }
.expertise-dot-right { right: 15%; top: 50%; transform: translate(50%, -50%); }

/* Center Circle Container */
.expertise-center-circle-container {
    grid-column: 2;
    grid-row: 1 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 280px;
    height: 280px;
    z-index: 1;
}

.expertise-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid transparent;
    opacity: 0;
    transform: scale(0);
}

.expertise-circle-1 {
    width: 280px;
    height: 280px;
    border-color: rgba(234, 88, 12, 0.1);
    background: radial-gradient(circle, rgba(234, 88, 12, 0.03) 0%, transparent 70%);
}

.expertise-circle-2 {
    width: 220px;
    height: 220px;
    border-color: rgba(234, 88, 12, 0.15);
    background: radial-gradient(circle, rgba(234, 88, 12, 0.05) 0%, transparent 70%);
}

.expertise-circle-3 {
    width: 160px;
    height: 160px;
    border-color: rgba(234, 88, 12, 0.25);
    background: radial-gradient(circle, rgba(234, 88, 12, 0.08) 0%, transparent 70%);
    box-shadow: 0 0 40px rgba(234, 88, 12, 0.15);
}

.expertise-circle-4 {
    width: 110px;
    height: 110px;
    border-color: rgba(234, 88, 12, 0.4);
    background: linear-gradient(135deg, rgba(234, 88, 12, 0.15) 0%, rgba(234, 88, 12, 0.25) 100%);
    box-shadow: 0 0 60px rgba(234, 88, 12, 0.3), inset 0 0 30px rgba(234, 88, 12, 0.1);
}

/* Center Logo */
.expertise-center-logo {
    position: absolute;
    width: 80px;
    height: 80px;
    opacity: 0;
    transform: scale(0);
    z-index: 10;
    transform-style: preserve-3d;
    perspective: 1000px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.expertise-center-logo svg {
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.expertise-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 0 20px rgba(234, 88, 12, 0.4));
}

/* Grid Cards */
.expertise-grid-card {
    opacity: 0;
    transform: translateY(40px);
}

.expertise-card-top-left { grid-column: 1; grid-row: 1; text-align: right; padding-right: 20px; }
.expertise-card-top-right { grid-column: 3; grid-row: 1; text-align: left; padding-left: 20px; }
.expertise-card-bottom-left { grid-column: 1; grid-row: 2; text-align: right; padding-right: 20px; }
.expertise-card-bottom-right { grid-column: 3; grid-row: 2; text-align: left; padding-left: 20px; }

.expertise-card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    opacity: 0;
    transform: scale(0.5);
}

.expertise-card-top-left .expertise-card-icon,
.expertise-card-bottom-left .expertise-card-icon {
    margin-left: auto;
}

.expertise-card-icon svg {
    width: 32px;
    height: 32px;
    stroke: #EA580C;
    stroke-width: 1.5;
    fill: none;
}

.expertise-card-title {
    font-family: var(--sf-font);
    font-size: 1.5rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 12px;
    line-height: 1.3;
    opacity: 0;
    transform: translateY(20px);
}

.expertise-card-description {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
    max-width: 380px;
    opacity: 0;
    transform: translateY(20px);
}

.expertise-card-top-left .expertise-card-description,
.expertise-card-bottom-left .expertise-card-description {
    margin-left: auto;
}

/* Expertise Responsive */
@media (max-width: 1100px) {
    .expertise-grid-container { gap: 40px 60px; }
    .expertise-center-circle-container { width: 220px; height: 220px; }
    .expertise-circle-1 { width: 220px; height: 220px; }
    .expertise-circle-2 { width: 170px; height: 170px; }
    .expertise-circle-3 { width: 130px; height: 130px; }
    .expertise-circle-4 { width: 90px; height: 90px; }
    .expertise-card-title { font-size: 1.25rem; }
    .expertise-card-description { font-size: 0.9rem; }
}

@media (max-width: 900px) {
    .expertise-section { padding: 60px 30px; }
    .expertise-grid-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 50px;
        text-align: center;
    }
    .expertise-center-lines { display: none; }
    .expertise-center-circle-container { grid-column: 1; grid-row: 1; margin: 0 auto 20px; }
    .expertise-card-top-left,
    .expertise-card-top-right,
    .expertise-card-bottom-left,
    .expertise-card-bottom-right {
        grid-column: 1;
        text-align: center;
        padding: 0;
    }
    .expertise-card-top-left { grid-row: 2; }
    .expertise-card-top-right { grid-row: 3; }
    .expertise-card-bottom-left { grid-row: 4; }
    .expertise-card-bottom-right { grid-row: 5; }
    .expertise-card-icon,
    .expertise-card-top-left .expertise-card-icon,
    .expertise-card-bottom-left .expertise-card-icon {
        margin: 0 auto 16px;
    }
    .expertise-card-description,
    .expertise-card-top-left .expertise-card-description,
    .expertise-card-bottom-left .expertise-card-description {
        margin: 0 auto;
        max-width: 450px;
    }
}

@media (max-width: 600px) {
    .expertise-section { padding: 50px 20px; min-height: auto; }
    .expertise-center-circle-container { width: 180px; height: 180px; }
    .expertise-circle-1 { width: 180px; height: 180px; }
    .expertise-circle-2 { width: 140px; height: 140px; }
    .expertise-circle-3 { width: 100px; height: 100px; }
    .expertise-circle-4 { width: 70px; height: 70px; }
    .expertise-center-logo { width: 50px; height: 50px; }
    .expertise-card-title { font-size: 1.15rem; }
    .expertise-card-description { font-size: 0.875rem; }
    .expertise-grid-container { gap: 40px; }
}

/* Floating particles */
.expertise-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #EA580C;
    border-radius: 50%;
    opacity: 0;
    pointer-events: none;
    z-index: 5;
    box-shadow: 0 0 10px rgba(234, 88, 12, 0.6), 0 0 20px rgba(234, 88, 12, 0.3);
}

/* Particle positions (NO inline styles) */
.expertise-particle-1 { top: 20%; left: 15%; }
.expertise-particle-2 { top: 30%; left: 80%; }
.expertise-particle-3 { top: 70%; left: 10%; }
.expertise-particle-4 { top: 75%; left: 85%; }
.expertise-particle-5 { top: 45%; left: 5%; }
.expertise-particle-6 { top: 55%; left: 92%; }

/* Badge */
.expertise-badge {
    opacity: 0;
    transform: translateY(-20px);
}

/* Title */
.expertise-title {
    opacity: 0;
    transform: translateY(30px);
}