/* ========= GLOBAL STYLE (Existing) ========= */
:root {
  --primary-color: #00eeff;
  --primary-dark: #0a0f1a;
  --secondary-dark: #111827;
  --tertiary-dark: #1e293b;
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --accent: #00eeff;

  --spacing-s: 0.75rem;
  --spacing-m: 1.25rem;
  --spacing-l: 2rem;
  --spacing-xl: 4rem;

  --border-radius: 10px;
  --transition: all 0.3s ease;

  --box-shadow: 0 4px 15px rgba(0, 238, 255, 0.15);
}

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

body {
  font-family: 'Poppins', sans-serif;
  background: var(--primary-dark);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background 0.4s, color 0.4s;
}

/* Ensure smooth scrolling when menu is active/for links */
html {
    scroll-behavior: smooth;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
}

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
}

p {
  margin-bottom: var(--spacing-s);
  color: var(--text-secondary);
}

/* ========= HEADER (Refined) ========= */
header {
  width: 100%;
  padding: var(--spacing-s) 0;
  position: fixed;
  top: 0;
  left: 0;
  background: transparent;
  transition: var(--transition);
  z-index: 1000;
}

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

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

header.header-scroll {
  background: var(--secondary-dark);
  box-shadow: var(--box-shadow);
  padding: 0.5rem 0; /* Slightly smaller on scroll */
}

.logo a {
  font-size: 1.5rem; /* Slightly larger logo */
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  /* Reset positioning for desktop */
  position: static;
  background: none;
  padding: 0;
  width: auto;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
  padding: 5px 0; /* Add padding for better hover target */
}

.nav-links a:hover {
  color: var(--accent);
}

/* ========= HAMBURGER (Existing) ========= */
.hamburger {
  display: none;
  cursor: pointer;
  z-index: 100; /* Ensure it's above the nav links */
}

.hamburger .line {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  margin: 4px;
  transition: var(--transition);
}

/* Hamburger active transformation */
.hamburger.active .line:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}
.hamburger.active .line:nth-child(2) {
    opacity: 0;
}
.hamburger.active .line:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* ========= HERO (Refined) ========= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 0 var(--spacing-xl) 0; /* Adjust top padding */
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-l); /* Use gap for spacing */
}

.hero-text {
  flex: 1 1 50%;
  max-width: 600px;
}

.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3rem); /* Responsive font size */
  margin-bottom: var(--spacing-s);
  color: var(--accent);
}

.hero-text h2 {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  margin-bottom: var(--spacing-s);
  color: var(--text-primary);
}

.hero-text p {
  max-width: 600px;
  margin-bottom: var(--spacing-m);
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: var(--spacing-m);
}

/* Tombol (Button) Styling */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  font-weight: 500;
  text-align: center;
  cursor: pointer; /* Menambahkan kursor pointer */
  border: none; /* Menghapus border default untuk tombol */
  line-height: 1.5;
  text-decoration: none;
}

.primary-btn {
  background: var(--accent);
  color: #000;
}

.secondary-btn {
  border: 2px solid var(--accent);
  color: var(--accent);
  background: transparent;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--box-shadow);
}

.social-icons a {
  color: var(--accent);
  font-size: 1.5rem; /* Slightly larger icons */
  margin-right: 15px; /* More spacing */
  transition: var(--transition);
}

.social-icons a:hover {
  color: #fff;
}

.hero-image {
    flex: 1 1 40%;
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 250px;
}

.security-graphic {
    position: relative;
    width: 250px;
    height: 250px;
}

.shield {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 5rem;
    color: var(--accent);
    z-index: 10;
}

.ripple {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(0, 238, 255, 0.2);
    transform: translate(-50%, -50%) scale(0);
    animation: pulse 4s infinite cubic-bezier(0.6, 0.05, 0.25, 1);
}

.binary {
    position: absolute;
    top: 0;
    right: 0;
    color: var(--text-secondary);
    opacity: 0.3;
    font-size: 0.8rem;
    white-space: nowrap;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(0.1); opacity: 0.8; }
    100% { transform: translate(-50%, -50%) scale(1.5); opacity: 0; }
}

/* ========= SECTION (Existing) ========= */
section {
  padding: var(--spacing-xl) 0;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

.section-animate {
  opacity: 1;
  transform: translateY(0);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-l);
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem); /* Responsive font size */
  color: var(--accent);
}

.underline {
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin: 10px auto 0;
  border-radius: 3px;
}

/* ========= ABOUT (Refined) ========= */
.about-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--spacing-l);
}

.about-text {
  flex: 1 1 55%;
  min-width: 300px;
}

.contact-info {
  flex: 1 1 35%;
  min-width: 250px;
}

.contact-item {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-s);
  gap: 0.75rem;
  color: var(--text-secondary);
}

.contact-item i {
  color: var(--accent);
}

/* ========= SKILLS (Refined) ========= */
.skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-l);
  justify-content: center;
}

.skill-category {
    flex: 1 1 45%; /* Allow categories to take up about half the space */
    min-width: 300px;
}

.skill-category h3 {
  margin-bottom: var(--spacing-m);
  text-align: center;
  color: var(--text-primary);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 5px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); /* Slightly smaller min size */
  gap: var(--spacing-s);
}

.skill-item {
  background: var(--tertiary-dark);
  padding: 0.75rem;
  text-align: center;
  border-radius: var(--border-radius);
  transition: var(--transition);
  font-size: 0.95rem;
}

.skill-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow);
}

/* ========= RESPONSIBLE DISCLOSURE (Refined) ========= */
.response {
  background-color: var(--secondary-dark);
}

.response .desc {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-l); /* Increased margin */
}

.disclosure-list {
  list-style: none;
  max-width: 850px; /* Slightly wider list */
  margin: 0 auto;
  padding: 0;
}

.disclosure-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--tertiary-dark);
  padding: 1rem var(--spacing-m); /* More vertical padding */
  margin-bottom: var(--spacing-s);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.disclosure-list li:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 238, 255, 0.3);
}

.disclosure-list span {
  color: var(--text-primary);
  font-weight: 500;
  flex-grow: 1;
  text-align: left;
}

.btn.small-btn {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 5px; /* Slightly smaller border radius */
  transition: var(--transition);
  margin-left: var(--spacing-s); /* Space from company name */
  flex-shrink: 0; /* Pastikan tombol tidak menyusut */
}

.btn.small-btn:hover {
  background: var(--accent);
  color: #000;
}

.disclosure-note {
  margin-top: var(--spacing-xl);
  text-align: center;
  color: var(--text-secondary);
  border-top: 1px dashed var(--text-secondary);
  padding-top: var(--spacing-m);
}

.disclosure-note h3 {
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* ========= EXPERIENCE & EDUCATION (Refined Timeline) ========= */
.timeline {
  position: relative;
  max-width: 900px;
  margin: auto;
  padding: 0 10px;
}

/* Desktop line for the timeline */
.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px; /* Aligned with the icon center */
    width: 2px;
    height: 100%;
    background-color: var(--tertiary-dark);
    z-index: 1;
}

.timeline-item {
  margin-bottom: var(--spacing-l);
  padding-left: 60px; /* Space for the icon/line */
  position: relative;
}

.timeline-icon {
  position: absolute;
  left: 0;
  top: 0;
  background: var(--accent);
  color: var(--primary-dark);
  border: 3px solid var(--primary-dark); /* Border to cover the line */
  border-radius: 50%;
  width: 45px; /* Slightly larger icon */
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.timeline-content {
  background: var(--tertiary-dark);
  padding: var(--spacing-m);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-3px);
}

.timeline-content h3 {
  color: var(--accent);
  margin-bottom: 0.3rem;
  font-size: 1.2rem;
}

.timeline-content h4 {
    color: var(--text-primary);
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.timeline-date {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-s);
}

.timeline-content ul {
    list-style-type: none;
    padding-left: 0;
}

.timeline-content li {
    position: relative;
    padding-left: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
    font-size: 0.95rem;
}

.timeline-content li::before {
    content: '\2022'; /* Bullet point */
    color: var(--accent);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

/* ========= CERTIFICATIONS (Refined) ========= */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); /* Better fit for mobile/desktop */
  gap: var(--spacing-m);
}

.certification-card {
  background: var(--tertiary-dark);
  padding: var(--spacing-m);
  border-radius: var(--border-radius);
  transition: var(--transition);
  
  /* FIX FLEXBOX UNTUK KARTU SERTIFIKASI */
  display: flex;
  align-items: center;
  justify-content: space-between; /* Memisahkan content dan tombol */
  /* END FIX */
  
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.certification-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow);
}

.certification-content {
    /* FIX: Memastikan konten mengambil ruang yang tersedia */
    flex-grow: 1;
    margin-right: 1rem; /* Jarak antara teks dan tombol */
    /* END FIX */
}

.certification-content h3 {
  color: var(--accent);
  margin-bottom: 0.2rem;
  font-size: 1.1rem;
}

.certification-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* EDUCATION uses the same timeline structure, no extra CSS needed */

/* ========= CONTACT (Refined) ========= */
.contact-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-l);
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--tertiary-dark);
  padding: var(--spacing-m);
  border-radius: var(--border-radius);
  width: 100%; /* Full width on mobile */
  max-width: 350px; /* Constrain max width for desktop */
  justify-content: flex-start; /* Align content to the start */
  transition: var(--transition);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.contact-info-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
}

.contact-info-item .icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background: rgba(0, 238, 255, 0.1);
}

.contact-info-item i {
  color: var(--accent);
  font-size: 1.5rem;
}

.contact-info-item h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.contact-info-item p {
    margin: 0;
    font-size: 0.9rem;
}

.contact-info-item a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s;
}

.contact-info-item a:hover {
    text-decoration: underline;
}

/* ========= FOOTER (Existing) ========= */
footer {
  background: var(--secondary-dark);
  text-align: center;
  padding: var(--spacing-m) 0;
  margin-top: var(--spacing-l);
}

.footer-links {
  margin-bottom: var(--spacing-s);
}

.footer-links a {
  margin: 0 10px;
  text-decoration: none;
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ========= RESPONSIVE (MOBILE OPTIMIZATION) ========= */
/* Mobile (Max 768px) */
@media (max-width: 768px) {
    /* Header/Nav */
    nav {
        display: flex;
        justify-content: space-between;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: fixed; /* Use fixed for full viewport height */
        top: 0;
        right: 0;
        background: var(--secondary-dark);
        width: 70%;
        max-width: 300px;
        height: 100vh;
        padding-top: 80px;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.3);
    }

    .nav-links.nav-active {
        display: flex;
        transform: translateX(0);
    }

    .nav-links li {
        margin: 10px var(--spacing-m);
        border-bottom: 1px solid var(--tertiary-dark);
    }

    .nav-links a {
        display: block;
        padding: 10px 0;
    }

    .hamburger {
        display: block;
    }

    /* Hero */
    .hero-content {
        flex-direction: column-reverse; /* Put image before text */
        text-align: center;
    }

    .hero-text {
        margin-right: 0;
        margin-bottom: var(--spacing-l);
        max-width: 100%;
    }

    .hero-image {
        margin-bottom: var(--spacing-l);
    }

    .cta-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .btn {
        flex-grow: 1; /* Buttons take up full width if they wrap */
    }

    /* About */
    .about-content {
        flex-direction: column;
    }

    .contact-info {
        margin-top: var(--spacing-m);
    }

    .contact-item {
        justify-content: center;
    }

    /* Skills */
    .skill-category {
        min-width: 100%;
    }

    /* Disclosure */
    .disclosure-list li {
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-m);
    }

    .disclosure-list span {
        margin-bottom: var(--spacing-s);
    }

    .btn.small-btn {
        margin-left: 0;
    }

    /* Certifications - FIX MOBILE */
    .certifications-grid {
        grid-template-columns: 1fr; /* Stack on mobile */
    }
    
    .certification-card {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .certification-content {
        margin-right: 0;
        margin-bottom: 10px;
    }
    /* END FIX MOBILE */

    /* Timeline (Experience/Education) */
    .timeline::before {
        left: 22.5px; /* Center the line */
    }

    .timeline-item {
        padding-left: 65px;
    }

    /* Contact */
    .contact-info-item {
        justify-content: flex-start; /* Align left */
    }
}


/* ========= DESKTOP ENHANCEMENTS (Min 992px) ========= */
@media (min-width: 992px) {
    /* Timeline - 2-sided layout (Optional, tapi lebih rapih) */
    .timeline {
        display: block; 
        padding: 0;
    }

    .timeline::before {
        left: 50%;
        margin-left: -1px; 
    }
    
    /* ... logic 2-sided timeline ... */

    .timeline-item {
        margin-bottom: var(--spacing-l);
        width: 50%;
        padding-left: 0;
        padding-right: 30px; 
    }

    .timeline-item:nth-child(even) {
        margin-left: 50%;
        padding-left: 30px;
        padding-right: 0;
    }
    
    /* ... styling untuk ikon dan konten 2-sided timeline ... */
    .timeline-item:nth-child(even) .timeline-icon {
        left: auto;
        right: -22.5px;
    }

    .timeline-item:nth-child(odd) .timeline-icon {
        left: auto;
        right: -22.5px; 
        margin-left: 50%;
        transform: translateX(-50%);
    }

    .timeline-item:nth-child(even) .timeline-icon {
        right: auto;
        left: -22.5px;
        transform: translateX(50%);
    }

    .timeline-item:nth-child(odd) .timeline-content {
        text-align: right;
    }
    
    .timeline-item .timeline-icon {
        left: 50%;
        transform: translateX(-50%);
    }
    /* END logic 2-sided timeline */

    /* Certifications - FIX DESKTOP */
    .certifications-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .certification-card {
        flex-direction: row; /* Kembali ke tata letak baris */
        align-items: center;
    }
    
    .certification-content {
        margin-right: 1rem;
        margin-bottom: 0;
    }
    /* END FIX DESKTOP */
}