/* ========================================
   RESET & DASAR
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    font-family: 'Inter', sans-serif;
    color: #1a1a1a;
    line-height: 1.6;
    background: #f9fafc;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   FONT SETUP - GE VERNOVA STYLE
   ======================================== */
.header-brand,
.header-slogan,
.logo-text .brand {
    font-family: 'Inter', 'Avenir Next', sans-serif;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.hero-full h1,
.hero-full h1 span {
    font-family: 'Anton', sans-serif;
    font-weight: 400;
    line-height: 0.9;
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

/* ========================================
   HERO - OVERLAY MIRING KE KANAN
   ======================================== */
.hero-full {
    position: relative;
    min-height: 65vh;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    color: white;
    padding: 80px 0 50px;
    background: url('images/oil-gas.png') center center / cover no-repeat;
    overflow: hidden;
}

.hero-full .hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    z-index: 1;
}

.hero-slant {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 65%;
    background: rgba(0, 0, 0, 0.60);
    z-index: 2;
    transform: skewX(-12deg);
    transform-origin: top left;
    border-right: 4px solid #00a3ff;
}

.hero-full .hero-content-center {
    position: relative;
    z-index: 3;
    max-width: 900px;
    margin: 0;
    padding: 0 20px 0 80px;
    width: 100%;
}

.hero-text-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    max-width: 750px;
    margin: 0;
}

.hero-underline {
    width: 6px;
    min-height: 100px;
    background: #00a3ff;
    border-radius: 4px;
    flex-shrink: 0;
    margin-top: 8px;
}

.hero-text {
    text-align: left;
    flex: 1;
}

.hero-full h1 {
    font-family: 'Anton', sans-serif;
    font-size: 4.2rem;
    font-weight: 400;
    line-height: 0.9;
    margin-bottom: 8px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.5);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.hero-full h1 span {
    font-family: 'Anton', sans-serif;
    font-weight: 400;
    color: #66ccff;
    font-size: 3.6rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.hero-full p {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 25px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 300;
}

.hero-full .btn-primary {
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 600;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn-primary {
    display: inline-block;
    background: #00a3ff;
    color: white;
    padding: 14px 36px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 1rem;
    transition: 0.3s;
    border: none;
    cursor: pointer;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.btn-primary:hover {
    background: #0077cc;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,163,255,0.4);
}

.btn-secondary {
    display: inline-block;
    background: #00a3ff;
    color: white;
    padding: 10px 28px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: 0.3s;
    border: none;
    cursor: pointer;
    text-decoration: none;
}

.btn-secondary:hover {
    background: #0077cc;
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(0,163,255,0.3);
}

/* ========================================
   SECTION TITLE
   ======================================== */
.section-title {
    font-family: 'Inter', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: #0a2a43;
    text-align: center;
    margin-bottom: 40px;
    border-bottom: 4px solid #00a3ff;
    padding-bottom: 12px;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 3px;
}

/* ========================================
   SECTION SUBTITLE (RATA KIRI)
   ======================================== */
.section-subtitle {
    text-align: left;
    color: #4a5568;
    font-size: 1rem;
    margin-bottom: 40px;
    font-weight: 300;
    letter-spacing: 0.5px;
}

/* ========================================
   CORE VALUES
   ======================================== */
.core-values {
    background: #ffffff;
    padding: 60px 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.value-item {
    background: #f7fafc;
    padding: 30px 20px;
    border-radius: 16px;
    text-align: center;
    transition: 0.3s;
    border: 1px solid #eef2f7;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.value-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    border-color: #00a3ff;
}

.value-item i {
    font-size: 2.8rem;
    color: #00a3ff;
    margin-bottom: 12px;
}

.value-item h4 {
    font-family: 'Inter', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: #0a2a43;
    margin-bottom: 6px;
}

.value-item p {
    font-size: 0.95rem;
    color: #4a5568;
}

/* ========================================
   WHY CHOOSE US & CERTIFICATIONS
   ======================================== */
.why-choose,
.certifications-section,
.courses-preview,
.partners-section {
    padding: 60px 0;
}

.why-grid,
.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.why-item,
.cert-item {
    background: #ffffff;
    padding: 25px 20px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid #eef2f7;
    transition: 0.3s;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.why-item:hover,
.cert-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    border-color: #00a3ff;
}

.why-item i {
    font-size: 2.8rem;
    color: #00a3ff;
    margin-bottom: 12px;
}

.why-item h4 {
    font-family: 'Inter', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: #0a2a43;
    margin-bottom: 6px;
}

.why-item p {
    font-size: 0.95rem;
    color: #4a5568;
}

.cert-item img {
    height: 60px;
    width: auto;
    object-fit: contain;
    margin-bottom: 12px;
}

.cert-item span {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: #0a2a43;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ========================================
   COURSES SLIDER
   ======================================== */
.courses-preview {
    background: #f0f6fe;
    overflow: hidden;
}

.courses-slider-wrapper {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 60px;
}

.courses-slider-container {
    overflow: hidden;
    border-radius: 16px;
}

.courses-slider {
    display: flex;
    gap: 25px;
    transition: transform 0.5s ease;
}

.courses-slider .course-card {
    flex: 0 0 calc(25% - 19px);
    min-width: calc(25% - 19px);
    height: 320px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background-size: cover;
    background-position: center;
    position: relative;
}

.courses-slider .course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.2);
}

.courses-slider .course-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.60);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 25px 20px 20px;
    text-align: center;
    transition: background 0.3s ease;
}

.courses-slider .course-card:hover .course-overlay {
    background: rgba(0, 0, 0, 0.75);
}

.courses-slider .course-overlay h3 {
    font-family: 'Inter', sans-serif;
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.3;
    text-shadow: 0 2px 12px rgba(0,0,0,0.8);
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.courses-slider .course-overlay p {
    color: rgba(255,255,255,0.85);
    font-size: 0.85rem;
    margin-bottom: 12px;
    line-height: 1.4;
    text-shadow: 0 1px 8px rgba(0,0,0,0.5);
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    flex: 0 1 auto;
}

.courses-slider .course-overlay .btn-secondary {
    background: #00a3ff;
    color: white;
    padding: 8px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.8rem;
    transition: 0.3s;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    margin-top: auto;
    align-self: center;
    flex-shrink: 0;
}

.courses-slider .course-overlay .btn-secondary:hover {
    background: #0077cc;
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(0,163,255,0.3);
}

/* Slider Arrow */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: white;
    border: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    cursor: pointer;
    transition: opacity 0.3s ease, background 0.3s ease, transform 0.3s ease;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #0a2a43;
}

.slider-arrow:hover {
    background: #00a3ff;
    color: white;
    transform: translateY(-50%) scale(1.05);
}

.slider-arrow-left {
    left: -10px;
}

.slider-arrow-right {
    right: -10px;
}

/* Slider Dots */
.slider-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 25px;
}

.slider-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #d0d7e2;
    cursor: pointer;
    transition: 0.3s;
}

.slider-dots .dot.active {
    background: #00a3ff;
    transform: scale(1.2);
}

/* ========================================
   OUR PARTNERS - SLIDER OTOMATIS
   ======================================== */
.partners-section {
    background: #ffffff;
    overflow: hidden;
}

.partners-slider-wrapper {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.partners-slider {
    display: flex;
    overflow: hidden;
}

.partners-track {
    display: flex;
    animation: scrollPartners 30s linear infinite;
    gap: 30px;
    align-items: center;
}

.partner-item {
    flex: 0 0 auto;
    width: 150px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f7fafc;
    border-radius: 12px;
    padding: 10px;
    border: 1px solid #eef2f7;
    transition: 0.3s;
}

.partner-item:hover {
    border-color: #00a3ff;
    box-shadow: 0 4px 16px rgba(0,163,255,0.15);
}

.partner-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: none;
    opacity: 1;
    transition: 0.3s;
}

.partner-item:hover img {
    transform: scale(1.05);
}

@keyframes scrollPartners {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* ================================================================
   RESPONSIVE - FIX COURSES SLIDER
   ================================================================ */

/* ===== DESKTOP (≥992px) - 4 CARD ===== */
@media (min-width: 992px) {
    .courses-slider .course-card {
        flex: 0 0 calc(25% - 19px);
        min-width: calc(25% - 19px);
        height: 320px;
    }
    .slider-arrow {
        display: flex !important;
    }
    .slider-arrow.hidden {
        opacity: 1 !important;
        pointer-events: auto !important;
    }
}

/* ===== TABLET (≤991px & ≥769px) - 2 CARD ===== */
@media (max-width: 991px) and (min-width: 769px) {
    .values-grid,
    .why-grid,
    .cert-grid {
        grid-template-columns: 1fr 1fr;
    }
    .partner-item {
        width: 120px;
        height: 70px;
    }
    .courses-slider .course-card {
        flex: 0 0 calc(50% - 13px);
        min-width: calc(50% - 13px);
        height: 280px;
    }
    .slider-arrow {
        display: flex !important;
    }
    .slider-arrow.hidden {
        opacity: 1 !important;
        pointer-events: auto !important;
    }
}

/* ===== MOBILE (≤768px) - 3 CARD ===== */
@media (max-width: 768px) {
    .hero-full {
        min-height: 30vh;
        padding: 55px 0 18px;
    }

    .hero-full h1 {
        font-size: 1.8rem;
    }
    .hero-full h1 span {
        font-size: 1.5rem;
    }

    .hero-full p {
        font-size: 0.55rem;
        margin-bottom: 12px;
        line-height: 1.5;
        letter-spacing: 0.5px;
        max-width: 60%;
    }

    .hero-full p br {
        display: none;
    }

    .hero-full .btn-primary {
        padding: 8px 20px;
        font-size: 0.65rem;
    }

    .hero-underline {
        min-height: 50px;
        width: 4px;
    }

    .hero-text-wrapper {
        gap: 12px;
    }

    .hero-full .hero-content-center {
        padding: 0 16px;
    }

    .hero-slant {
        width: 85%;
        transform: skewX(-6deg);
    }

    /* ===== AVAILABLE COURSES - MOBILE ===== */
    .courses-preview {
        padding: 20px 0 30px;
        overflow: hidden;
    }

    .courses-slider-wrapper {
        padding: 0 12px;
        overflow: hidden;
        position: relative;
    }

    .courses-slider-container {
        overflow: hidden;
        border-radius: 12px;
    }

    .courses-slider {
        display: flex;
        gap: 8px;
        transition: transform 0.3s ease;
        will-change: transform;
        cursor: grab;
        overflow: visible;
    }

    .courses-slider:active {
        cursor: grabbing;
    }

    .courses-slider .course-card {
        flex: 0 0 calc(33.333% - 6px);
        min-width: calc(33.333% - 6px);
        height: 200px;
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        background-size: cover;
        background-position: center;
        position: relative;
    }

    .courses-slider .course-overlay {
        position: absolute;
        inset: 0;
        background: rgba(0, 0, 0, 0.60);
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        padding: 12px 8px 12px;
        text-align: center;
    }

    .courses-slider .course-overlay h3 {
        color: #ffffff;
        font-size: 0.65rem;
        font-weight: 700;
        line-height: 1.2;
        text-shadow: 0 2px 12px rgba(0,0,0,0.8);
        margin: 0;
        min-height: 28px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .courses-slider .course-overlay p {
        color: rgba(255,255,255,0.85);
        font-size: 0.48rem;
        line-height: 1.3;
        text-shadow: 0 1px 8px rgba(0,0,0,0.5);
        margin: 4px 0;
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 28px;
        flex: 1;
        width: 100%;
    }

    .courses-slider .course-overlay .btn-secondary {
        background: #00a3ff;
        color: white;
        padding: 4px 12px;
        border-radius: 20px;
        font-weight: 600;
        font-size: 0.48rem;
        border: none;
        cursor: pointer;
        text-decoration: none;
        display: inline-block;
        transition: 0.3s;
        align-self: center;
        margin-top: auto;
        min-height: 24px;
        line-height: 1.4;
    }

    .courses-slider .course-overlay .btn-secondary:hover {
        background: #0077cc;
        transform: scale(1.05);
        box-shadow: 0 6px 16px rgba(0,163,255,0.3);
    }

    /* Sembunyikan arrow di mobile */
    .slider-arrow {
        display: none !important;
    }

    .slider-dots {
        margin-top: 14px;
        gap: 8px;
    }

    .slider-dots .dot {
        width: 8px;
        height: 8px;
    }

    /* ===== CORE VALUES ===== */
    .core-values {
        padding: 30px 0 25px;
    }

    .values-grid {
        gap: 12px;
    }

    .value-item {
        min-height: 110px;
        padding: 14px 10px;
        border-radius: 12px;
    }

    .value-item i {
        font-size: 1.6rem;
        margin-bottom: 6px;
    }

    .value-item h4 {
        font-size: 0.8rem;
        margin-bottom: 2px;
    }

    .value-item p {
        font-size: 0.6rem;
    }

    /* ===== WHY CHOOSE US ===== */
    .why-choose {
        padding: 30px 0 25px;
    }

    .why-grid {
        gap: 12px;
    }

    .why-item {
        min-height: 110px;
        padding: 14px 10px;
        border-radius: 12px;
    }

    .why-item i {
        font-size: 1.6rem;
        margin-bottom: 6px;
    }

    .why-item h4 {
        font-size: 0.8rem;
        margin-bottom: 2px;
    }

    .why-item p {
        font-size: 0.6rem;
    }

    /* ===== CERTIFICATIONS ===== */
    .certifications-section {
        padding: 30px 0 25px;
    }

    .cert-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }

    .cert-item {
        min-height: 70px;
        padding: 8px 4px;
        border-radius: 10px;
        gap: 2px;
    }

    .cert-item img {
        height: 24px;
        margin-bottom: 2px;
    }

    .cert-item span {
        font-size: 0.4rem;
        letter-spacing: 0.2px;
        line-height: 1.2;
    }

    /* ===== PARTNERS ===== */
    .partners-section {
        padding: 30px 0 25px;
    }

    .partner-item {
        width: 70px;
        height: 44px;
        padding: 4px;
        border-radius: 8px;
    }

    .partners-track {
        gap: 12px;
        animation: scrollPartners 25s linear infinite;
    }

    .section-title {
        font-size: 1.3rem;
        margin-bottom: 16px;
        padding-bottom: 6px;
        letter-spacing: 1.5px;
    }

    .section-subtitle {
        font-size: 0.7rem;
        margin-bottom: 20px;
    }
}

/* ===== HP KECIL (≤480px) - 3 CARD LEBIH KECIL ===== */
@media (max-width: 480px) {
    .hero-full {
        min-height: 25vh;
        padding: 45px 0 14px;
    }

    .hero-full h1 {
        font-size: 1.3rem;
    }
    .hero-full h1 span {
        font-size: 1.1rem;
    }

    .hero-full p {
        font-size: 0.45rem;
        margin-bottom: 10px;
        max-width: 60%;
    }

    .hero-full .btn-primary {
        padding: 6px 14px;
        font-size: 0.5rem;
        border-radius: 30px;
    }

    .hero-underline {
        min-height: 35px;
        width: 3px;
    }

    .hero-text-wrapper {
        gap: 8px;
    }

    .hero-full .hero-content-center {
        padding: 0 12px;
    }

    /* ===== COURSES ===== */
    .courses-preview {
        padding: 16px 0 24px;
    }

    .courses-slider-wrapper {
        padding: 0 8px;
    }

    .courses-slider {
        gap: 6px;
    }

    .courses-slider .course-card {
        flex: 0 0 calc(33.333% - 4px);
        min-width: calc(33.333% - 4px);
        height: 170px;
        border-radius: 10px;
    }

    .courses-slider .course-overlay {
        padding: 10px 6px 10px;
    }

    .courses-slider .course-overlay h3 {
        font-size: 0.55rem;
        min-height: 22px;
    }

    .courses-slider .course-overlay p {
        font-size: 0.4rem;
        min-height: 22px;
        margin: 2px 0;
    }

    .courses-slider .course-overlay .btn-secondary {
        font-size: 0.4rem;
        padding: 2px 10px;
        border-radius: 16px;
        min-height: 20px;
    }

    /* ===== CORE VALUES ===== */
    .core-values {
        padding: 20px 0 16px;
    }

    .values-grid {
        gap: 8px;
    }

    .value-item {
        min-height: 85px;
        padding: 10px 6px;
        border-radius: 10px;
    }

    .value-item i {
        font-size: 1.2rem;
        margin-bottom: 4px;
    }

    .value-item h4 {
        font-size: 0.65rem;
    }

    .value-item p {
        font-size: 0.5rem;
    }

    /* ===== WHY CHOOSE ===== */
    .why-choose {
        padding: 20px 0 16px;
    }

    .why-grid {
        gap: 8px;
    }

    .why-item {
        min-height: 85px;
        padding: 10px 6px;
        border-radius: 10px;
    }

    .why-item i {
        font-size: 1.2rem;
        margin-bottom: 4px;
    }

    .why-item h4 {
        font-size: 0.65rem;
    }

    .why-item p {
        font-size: 0.5rem;
    }

    /* ===== CERTIFICATIONS ===== */
    .certifications-section {
        padding: 20px 0 16px;
    }

    .cert-grid {
        gap: 5px;
    }

    .cert-item {
        min-height: 55px;
        padding: 4px 2px;
        border-radius: 8px;
    }

    .cert-item img {
        height: 18px;
        margin-bottom: 1px;
    }

    .cert-item span {
        font-size: 0.35rem;
    }

    /* ===== PARTNERS ===== */
    .partners-section {
        padding: 20px 0 16px;
    }

    .partner-item {
        width: 55px;
        height: 34px;
        padding: 3px;
        border-radius: 6px;
    }

    .partners-track {
        gap: 8px;
        animation: scrollPartners 20s linear infinite;
    }

    .section-title {
        font-size: 1.1rem;
        margin-bottom: 14px;
        padding-bottom: 4px;
        letter-spacing: 1px;
    }

    .section-subtitle {
        font-size: 0.6rem;
        margin-bottom: 16px;
    }

    .slider-dots .dot {
        width: 6px;
        height: 6px;
    }
}