/* ----------------------------------------------
   1. CSS RESET & BASE
----------------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0A0A0A;
    --bg-secondary: #121212;
    --text-primary: #FFFFFF;
    --text-secondary: #A3A3A3;
    --accent: #1E6AFF;
    --accent-hover: #0047CC;
    --border-subtle: rgba(255, 255, 255, 0.06);
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    --max-width: 1200px;
    --section-padding: 80px;
    --mobile-padding: 24px;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--text-primary);
    text-decoration: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--mobile-padding);
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 14px 32px;
    border-radius: 8px;
    transition: background 0.2s ease, transform 0.1s ease;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    letter-spacing: 0.01em;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: scale(0.98);
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 14px 32px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: border-color 0.2s ease, background 0.2s ease;
    font-family: var(--font-body);
    letter-spacing: 0.01em;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-sm {
    padding: 10px 24px;
    font-size: 0.85rem;
}

.btn-large {
    padding: 18px 48px;
    font-size: 1.1rem;
}

/* Typography helpers */
.section-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 8px;
}

.section-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: clamp(2rem, 4vw, 2.8rem);
    letter-spacing: -0.02em;
    margin-bottom: 40px;
    line-height: 1.15;
}

.section-title .highlight {
    color: var(--accent);
}

/* ----------------------------------------------
   2. HEADER
----------------------------------------------- */
header {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(12px);
    z-index: 50;
}

.header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: none;
    align-items: center;
    gap: 36px;
    list-style: none;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color 0.2s ease;
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: #fff;
}

.nav-cta {
    background: var(--accent);
    padding: 10px 24px;
    border-radius: 6px;
    color: #fff !important;
    font-weight: 600;
    font-size: 0.85rem;
    transition: background 0.2s ease;
}

.nav-cta:hover {
    background: var(--accent-hover);
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}

.hamburger span {
    display: block;
    width: 26px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.25s ease;
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    padding: 40px 24px;
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    gap: 28px;
    align-items: center;
    z-index: 40;
}

.mobile-menu.open {
    display: flex;
}

.mobile-menu a {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.mobile-menu a:hover {
    color: #fff;
}

.mobile-menu .nav-cta {
    font-size: 1rem;
    padding: 12px 40px;
}

/* ----------------------------------------------
   3. HERO
----------------------------------------------- */
#hero {
    padding: var(--section-padding) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    gap: 48px;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hero-badge {
    display: inline-block;
    background: rgba(30, 106, 255, 0.12);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 100px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    width: fit-content;
    border: 1px solid rgba(30, 106, 255, 0.15);
}

.hero-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: clamp(2.6rem, 8vw, 4.4rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
}

.hero-title .highlight {
    color: var(--accent);
}

.hero-sub {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 540px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 8px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 12px;
    padding-top: 28px;
    border-top: 1px solid var(--border-subtle);
}

.hero-stats-item {
    display: flex;
    flex-direction: column;
}

.hero-stats-item .number {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.6rem;
    letter-spacing: -0.02em;
}

.hero-stats-item .label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.hero-visual {
    display: none;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    padding: 32px 28px;
    min-height: 200px;
    flex-direction: column;
    justify-content: center;
}

.hero-visual .code-line {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 6px 0;
    border-bottom: 1px solid var(--border-subtle);
}

.hero-visual .code-line .hl {
    color: var(--accent);
}

.hero-visual .code-line:last-child {
    border-bottom: none;
}

/* ----------------------------------------------
   4. PROBLEMS
----------------------------------------------- */
#problems {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.problems-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.problem-card {
    background: var(--bg-primary);
    padding: 32px 28px;
    border-radius: 12px;
    border-left: 3px solid transparent;
    transition: border-color 0.3s ease, background 0.2s ease;
}

.problem-card:hover {
    border-color: var(--accent);
    background: rgba(30, 106, 255, 0.04);
}

.problem-card .icon {
    font-size: 1.8rem;
    margin-bottom: 12px;
    display: block;
}

.problem-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.problem-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* ----------------------------------------------
   5. SERVICES (cards trên index)
----------------------------------------------- */
#services {
    padding: var(--section-padding) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.service-card {
    background: var(--bg-secondary);
    padding: 32px 28px;
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    transition: border-color 0.3s ease, transform 0.15s ease;
}

.service-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.service-card .icon {
    font-size: 2rem;
    margin-bottom: 16px;
    display: block;
}

.service-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.service-card .desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.service-card .price {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 16px;
}

.service-card .price small {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ----------------------------------------------
   6. PRICING TABLE
----------------------------------------------- */
#pricing {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 700px;
    margin: 0 auto;
}

.pricing-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    background: var(--bg-primary);
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
    transition: border-color 0.2s;
}

.pricing-row:hover {
    border-color: var(--accent);
}

.pricing-row .service-name {
    font-weight: 500;
}

.pricing-row .service-price {
    font-weight: 700;
    color: var(--accent);
    font-size: 1.05rem;
}

.pricing-row .service-price small {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.pricing-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 20px;
    border-top: 1px solid var(--border-subtle);
    padding-top: 20px;
}

/* ----------------------------------------------
   7. ABOUT
----------------------------------------------- */
#about {
    padding: var(--section-padding) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.about-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 28px 24px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    transition: border-color 0.2s;
}

.about-item:hover {
    border-color: var(--accent);
}

.about-item .icon {
    font-size: 2.2rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.about-item h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.about-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* ----------------------------------------------
   8. FINAL CTA
----------------------------------------------- */
#cta {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    text-align: center;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.cta-content h2 {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.cta-content p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 500px;
}

/* ----------------------------------------------
   9. SERVICES PAGE (detail sections)
----------------------------------------------- */
.service-detail {
    padding: var(--section-padding) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.service-detail:last-of-type {
    border-bottom: none;
}

.service-detail .service-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.service-detail .service-header .icon {
    font-size: 2.8rem;
}

.service-detail .service-header h2 {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    letter-spacing: -0.02em;
}

.service-detail .service-header h2 .highlight {
    color: var(--accent);
}

.service-detail .desc-large {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin-bottom: 28px;
    line-height: 1.7;
}

.service-detail .grid-2col {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.service-detail .grid-2col .col h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-detail .grid-2col .col ul {
    list-style: none;
    padding: 0;
}

.service-detail .grid-2col .col ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.service-detail .grid-2col .col ul li:last-child {
    border-bottom: none;
}

.service-detail .grid-2col .col ul li .check {
    color: var(--accent);
    font-weight: 700;
    flex-shrink: 0;
}

.service-detail .price-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 24px 28px;
    margin-top: 28px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.service-detail .price-box .price {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
}

.service-detail .price-box .price small {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.service-detail .price-box .note {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ----------------------------------------------
   10. CONTACT PAGE
----------------------------------------------- */
#contact-page {
    padding: var(--section-padding) 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
}

.contact-info h2 {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.contact-info .sub {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 32px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
    transition: border-color 0.2s;
}

.contact-method:hover {
    border-color: var(--accent);
}

.contact-method .emoji {
    font-size: 1.6rem;
    flex-shrink: 0;
}

.contact-method .label {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.contact-method .value {
    font-weight: 600;
    font-size: 1rem;
}

.contact-method .value a {
    color: var(--text-primary);
    transition: color 0.2s;
}

.contact-method .value a:hover {
    color: var(--accent);
}

/* Contact form */
.contact-form {
    background: var(--bg-secondary);
    padding: 36px 28px;
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
}

.contact-form h3 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 24px;
}

.contact-form .form-group {
    margin-bottom: 20px;
}

.contact-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.contact-form textarea {
    min-height: 120px;
    resize: vertical;
}

.contact-form .btn-primary {
    width: 100%;
    text-align: center;
}

/* ----------------------------------------------
   11. FOOTER
----------------------------------------------- */
footer {
    padding: 48px 0 32px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-subtle);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.footer-brand .logo {
    font-size: 1.6rem;
    margin-bottom: 12px;
    display: inline-block;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    max-width: 300px;
    margin: 0;
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 16px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #fff;
}

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-contact .contact-item a {
    color: var(--text-secondary);
    transition: color 0.2s;
}

.footer-contact .contact-item a:hover {
    color: #fff;
}

.footer-contact .contact-item .emoji {
    font-size: 1.1rem;
    width: 24px;
    flex-shrink: 0;
}

.footer-bottom {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* ----------------------------------------------
   12. RESPONSIVE
----------------------------------------------- */
@media (min-width: 768px) {
    .hamburger {
        display: none;
    }
    .nav-links {
        display: flex;
    }
    .hero-grid {
        grid-template-columns: 1fr 1fr;
        align-items: center;
    }
    .hero-visual {
        display: flex;
    }
    .hero-title {
        font-size: clamp(3rem, 5vw, 4.4rem);
    }
    .problems-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .footer-grid {
        grid-template-columns: 2fr 1fr 1.5fr;
    }
    .service-detail .grid-2col {
        grid-template-columns: 1fr 1fr;
    }
    .service-detail .price-box {
        flex-wrap: nowrap;
    }
    .contact-wrapper {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 767px) {
    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
    }
    .hero-stats-item .number {
        font-size: 1.3rem;
    }
    .problem-card {
        padding: 24px 20px;
    }
    .service-card {
        padding: 24px 20px;
    }
    .pricing-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 16px 20px;
    }
    .about-item {
        padding: 20px;
    }
    .service-detail .price-box {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    .service-detail .price-box .btn-primary {
        width: 100%;
        text-align: center;
    }
    .contact-form {
        padding: 24px 16px;
    }
}