/* =========================================================================================
   1. KONFIGURASI & VARIABEL GLOBAL
   ========================================================================================= */
:root {
    /* Warna Tema (Dark Mode) */
    --bg-color: #0f0f0f;
    --surface-color: #1a1a1a;
    --card-color: #222;
    --border-color: #333;
    
    --primary-text-color: #e0e0e0;
    --secondary-text-color: #a0a0a0;
    
    --accent-color: #00bcd4; /* Cyan */
    --accent-hover: #00e5ff;

    /* Tipografi */
    --font-family: 'Poppins', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.9rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.1rem;
    --font-size-xl: 1.3rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.8rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Spasi & Layout */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;
    --spacing-2xl: 50px;
    --spacing-3xl: 80px;

    --border-radius: 8px;
    --border-radius-full: 50%;
    --box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

img {
    max-width: 100%;
    display: block;
}

/* =========================================================================================
   3. KOMPONEN UTAMA & LAYOUT
   ========================================================================================= */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-bg {
    background-color: var(--surface-color);
}

.section-title {
    text-align: center;
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-text-color);
}

.section-subtitle {
    text-align: center;
    color: var(--secondary-text-color);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Header & Navbar --- */
.header {
    background-color: rgba(15, 15, 15, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.nav-logo {
    color: var(--accent-color);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--primary-text-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

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

/* --- Hamburger Menu (Mobile) --- */
.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--primary-text-color);
    transition: all 0.3s ease-in-out;
}

/* --- Social Icons --- */
.social-icons {
    display: flex;
    gap: var(--spacing-md);
}

.social-icons a {
    color: var(--secondary-text-color);
    font-size: var(--font-size-lg);
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-icons a:hover {
    color: var(--accent-color);
    transform: translateY(-3px);
}

/* --- Footer --- */
.footer {
    background-color: var(--surface-color);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--secondary-text-color);
}

/* =========================================================================================
   4. KOMPONEN SPESIFIK HALAMAN
   ========================================================================================= */

/* --- Hero Section --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(15, 15, 15, 0.7), rgba(15, 15, 15, 0.7)), url('https://placehold.co/1920x1080/0f0f0f/00bcd4?text=T4n+Company') no-repeat center center/cover;
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

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

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--secondary-text-color);
    margin-bottom: var(--spacing-lg);
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: 50px;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.cta-button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-3px);
}

/* --- Grid Layouts --- */
.goals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

/* --- Card Components --- */
.goal-card, .news-card, .developer-card {
    background-color: var(--card-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.goal-card:hover, .news-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 188, 212, 0.2);
}

.goal-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.news-date {
    font-size: var(--font-size-sm);
    color: var(--accent-color);
    font-weight: 600;
}

.news-card h3 {
    font-size: var(--font-size-xl);
    margin: var(--spacing-sm) 0;
    color: var(--primary-text-color);
}

/* --- Developer Card --- */
.developers-grid {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.developer-card {
    max-width: 250px;
    padding: var(--spacing-lg) var(--spacing-md);
}

.developer-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 16px rgba(0, 188, 212, 0.2);
}

.developer-img {
    width: 90px;
    height: 90px;
    border-radius: var(--border-radius-full);
    object-fit: cover;
    border: 3px solid var(--accent-color);
    margin: 0 auto var(--spacing-md) auto;
    transition: transform 0.3s ease;
}

.developer-card:hover .developer-img {
    transform: scale(1.1);
}

.developer-img-placeholder {
    width: 90px;
    height: 90px;
    border-radius: var(--border-radius-full);
    background-color: var(--surface-color);
    margin: 0 auto var(--spacing-md) auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--accent-color);
}

.developer-img-placeholder svg {
    width: 50px;
    height: 50px;
    color: var(--secondary-text-color);
}

.developer-card h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.developer-card p {
    color: var(--secondary-text-color);
    margin-bottom: var(--spacing-md);
}

.developer-link {
    color: var(--accent-color);
    font-weight: 600;
}

/* --- Gallery & Lightbox --- */
.gallery-item {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: transform 0.3s ease, filter 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
    filter: brightness(1.2);
}

.lightbox {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s;
}

.lightbox-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 900px;
    max-height: 80%;
    object-fit: contain;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.close-lightbox {
    position: absolute;
    top: 25px;
    right: 45px;
    color: var(--primary-text-color);
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
}

/* =========================================================================================
   5. KOMPONEN INTERAKTIF (Dropdown)
   ========================================================================================= */
.nav-item.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.dropdown-toggle i {
    font-size: 0.8em;
    transition: transform 0.3s ease;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--surface-color);
    min-width: 280px;
    max-height: 300px;
    overflow-y: auto;
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

.nav-item.dropdown.active > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--primary-text-color);
    font-weight: 400;
    transition: background-color 0.3s ease;
    border-radius: var(--border-radius);
}

.dropdown-menu li a:hover {
    background-color: var(--card-color);
    color: var(--accent-color);
}

.dev-tag {
    background-color: var(--accent-color);
    color: var(--bg-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-left: var(--spacing-sm);
}

/* =========================================================================================
   6. RESPONSIVE DESIGN (Mobile First Approach)
   ========================================================================================= */
@media (max-width: 768px) {
    /* --- Navbar & Menu --- */
    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--surface-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: var(--spacing-md) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .navbar .social-icons {
        display: none;
    }

    /* --- Dropdown di Mobile --- */
    .nav-item.dropdown {
        width: 100%;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background-color: transparent;
        display: none;
        padding-top: 0;
    }

    .nav-item.dropdown.active > .dropdown-menu {
        display: block;
    }
    
    .dropdown-menu li a {
        padding: var(--spacing-sm) 0;
        font-size: var(--font-size-sm);
    }

    /* --- Layout & Typography --- */
    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .developers-grid {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-lg);
    }
}

/* =========================================================================================
   7. HALAMAN KHUSUS PRODUCT
   ========================================================================================= */
.page-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: transparent;
    color: var(--secondary-text-color);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: var(--spacing-lg);
}

.back-button:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateX(-5px);
}

.product-list-page {
    display: grid;
    gap: var(--spacing-md);
}

.product-list-item {
    background-color: var(--card-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center; /* Tambahkan ini untuk meratakan vertikal */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-list-item:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 15px rgba(0, 188, 212, 0.2);
}

/* --- TAMBAHKAN GAYA UNTUK GAMBAR PRODUK --- */
.product-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-right: var(--spacing-lg);
    flex-shrink: 0; /* Mencegah gambar mengecil saat layar kecil */
}

.product-info {
    flex-grow: 1; /* Memastikan info mengambil sisa ruang */
}

.product-info h3 {
    font-size: var(--font-size-2xl);
    color: var(--primary-text-color);
    margin-bottom: var(--spacing-sm);
}

.product-info p {
    color: var(--secondary-text-color);
    line-height: 1.6;
}

.product-link-button {
    background-color: var(--accent-color);
    color: var(--bg-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.3s ease;
    flex-shrink: 0; /* Mencegah tombol menyusut */
}

.product-link-button:hover {
    background-color: var(--accent-hover);
}

/* --- Responsive untuk Halaman Product --- */
@media (max-width: 768px) {
    .product-list-item {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
        gap: var(--spacing-md);
    }

    /* Perbaikan tata letak gambar di mobile */
    .product-image {
        margin-right: 0;
        margin-bottom: 0; /* gap di flex sudah menangani ini */
        align-self: center; /* Pusatkan gambar di mobile */
    }
}

/* =========================================================================================
   8. HALAMAN KHUSUS GALLERY
   ========================================================================================= */
.page-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: transparent;
    color: var(--secondary-text-color);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: var(--spacing-lg);
}

.back-button:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateX(-5px);
}

.gallery-page-container {
    max-width: 1000px; /* Membatasi lebar maksimal agar tidak terlalu lebar */
    margin: 0 auto;
}

.gallery-item-page {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

/* Untuk membuat layout bergantian (kanan-kiri) */
.gallery-item-page.even {
    flex-direction: row-reverse;
}

.gallery-page-image {
    width: 400px; /* Ukuran kotak gambar */
    height: 400px;
    object-fit: cover; /* Memastikan gambar memenuhi kotak tanpa distorsi */
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: transform 0.3s ease, filter 0.3s ease;
    flex-shrink: 0; /* Mencegah gambar mengecil */
}

.gallery-page-image:hover {
    transform: scale(1.05);
    filter: brightness(1.2);
}

.gallery-page-content {
    flex-grow: 1; /* Memastikan teks mengambil sisa ruang */
}

.gallery-page-content h3 {
    font-size: var(--font-size-3xl);
    color: var(--primary-text-color);
    margin-bottom: var(--spacing-md);
}

.gallery-page-content p {
    color: var(--secondary-text-color);
    line-height: 1.7;
    font-size: var(--font-size-lg);
}

/* --- Responsive untuk Halaman Gallery --- */
@media (max-width: 768px) {
    .gallery-item-page,
    .gallery-item-page.even {
        flex-direction: column; /* Susun vertikal di mobile */
        text-align: center;
        gap: var(--spacing-lg);
    }

    .gallery-page-image {
        width: 100%;
        max-width: 400px; /* Batasi lebar maksimal di mobile */
        height: 300px; /* Sesuaikan tinggi untuk mobile */
    }
}