/* ============================================
   Portfolio - Muhammad Nur Riski Prasetio
   Theme: Classic Elegant (Charcoal, Beige, Gold)
   ============================================ */

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

:root {
    --color-primary: #2c3e50;
    --color-secondary: #34495e;
    --color-accent: #c9a961;
    --color-accent-dark: #b8943f;
    --color-background: #faf8f3;
    --color-background-alt: #f5f1e8;
    --color-white: #ffffff;
    --color-text: #3d3d3d;
    --color-text-light: #6b6b6b;
    --color-border: #e8e0d0;
    --shadow-sm: 0 2px 8px rgba(44, 62, 80, 0.08);
    --shadow-md: 0 4px 20px rgba(44, 62, 80, 0.12);
    --shadow-lg: 0 10px 40px rgba(44, 62, 80, 0.15);
    --transition: all 0.3s ease;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Poppins', 'Segoe UI', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

code {
    background: var(--color-background-alt);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--color-primary);
}

/* ---------- NAVIGATION BAR ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 75px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
}

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

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    padding: 8px 0;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    order: 3;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle {
    display: none;
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

/* ---------- SECTION COMMON ---------- */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-subtitle {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-accent-dark);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.title-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-dark));
    margin: 0 auto;
    border-radius: 2px;
}

/* ---------- HOME / BERANDA ---------- */
.home-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 30px 0;
    background: linear-gradient(135deg, #faf8f3 0%, #f0ebe0 100%);
    position: relative;
    overflow: hidden;
}

.home-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(201, 169, 97, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.home-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.home-greeting {
    font-size: 1.1rem;
    color: var(--color-accent-dark);
    font-weight: 500;
    margin-bottom: 16px;
}

.home-title {
    font-family: var(--font-heading);
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.accent-text {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.home-subtitle {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-secondary);
    margin-bottom: 24px;
}

.home-description {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-bottom: 36px;
    max-width: 520px;
}

.home-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(201, 169, 97, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(201, 169, 97, 0.45);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-3px);
}

.home-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-frame {
    position: relative;
    width: 380px;
    height: 480px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 8px solid var(--color-white);
    transform: rotate(2deg);
    transition: var(--transition);
    z-index: 2;
}

.image-frame:hover {
    transform: rotate(0deg) scale(1.02);
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.decorative-circle {
    position: absolute;
    border-radius: 50%;
    z-index: 1;
}

.circle-1 {
    width: 120px;
    height: 120px;
    background: var(--color-accent);
    opacity: 0.2;
    top: -20px;
    left: -20px;
}

.circle-2 {
    width: 180px;
    height: 180px;
    background: var(--color-primary);
    opacity: 0.08;
    bottom: -30px;
    right: -30px;
}

.wave-divider {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    line-height: 0;
}

.wave-divider svg {
    width: 100%;
    height: 80px;
}

.wave-divider-top {
    line-height: 0;
}

.wave-divider-top svg {
    width: 100%;
    height: 80px;
}

/* ---------- BIODATA SECTION ---------- */
.biodata-section {
    padding: 100px 30px;
    background: var(--color-background-alt);
}

.biodata-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.biodata-card {
    background: var(--color-white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--color-border);
}

.card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(201, 169, 97, 0.3);
}

.card-header h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-primary);
    font-weight: 600;
}

.biodata-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.biodata-item {
    padding: 16px 20px;
    background: var(--color-background-alt);
    border-radius: 12px;
    border-left: 4px solid var(--color-accent);
    transition: var(--transition);
}

.biodata-item:hover {
    background: #ede7d7;
    transform: translateX(5px);
}

.biodata-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-accent-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.biodata-label i {
    width: 18px;
}

.biodata-value {
    font-size: 1rem;
    color: var(--color-text);
    font-weight: 500;
}

/* Alasan Card */
.alasan-card {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-background) 100%);
}

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

.alasan-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--color-white);
    border-radius: 14px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.alasan-item:hover {
    border-color: var(--color-accent);
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

.alasan-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(44, 62, 80, 0.2);
}

.alasan-text h4 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 8px;
    font-weight: 600;
}

.alasan-text p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ---------- GALERI SECTION ---------- */
.galeri-section {
    padding: 100px 30px;
    background: var(--color-background);
}

.galeri-container {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.galeri-item {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    background: var(--color-white);
}

.galeri-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.galeri-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 133%;
    overflow: hidden;
}

.galeri-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.galeri-item:hover .galeri-img {
    transform: scale(1.08);
}

.galeri-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(44, 62, 80, 0.92) 0%, rgba(44, 62, 80, 0.4) 50%, transparent 100%);
    display: flex;
    align-items: flex-end;
    padding: 30px;
    opacity: 0;
    transition: var(--transition);
}

.galeri-item:hover .galeri-overlay {
    opacity: 1;
}

.galeri-info h4 {
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.galeri-info p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ---------- KONTAK SECTION ---------- */
.kontak-section {
    padding: 0 30px 100px;
    background: var(--color-background-alt);
}

.kontak-container {
    max-width: 1100px;
    margin: 0 auto;
}

.kontak-header {
    margin-bottom: 50px;
}

.kontak-description {
    margin-top: 20px;
    font-size: 1rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.kontak-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 700px;
    margin: 0 auto;
}

.kontak-card {
    background: var(--color-white);
    border-radius: 18px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.kontak-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.kontak-icon {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
    transition: var(--transition);
}

.ig-card .kontak-icon {
    background: linear-gradient(135deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
    color: var(--color-white);
    box-shadow: 0 6px 20px rgba(220, 39, 67, 0.3);
}

.linkedin-card .kontak-icon {
    background: linear-gradient(135deg, #0077b5, #005582);
    color: var(--color-white);
    box-shadow: 0 6px 20px rgba(0, 119, 181, 0.3);
}

.kontak-card:hover .kontak-icon {
    transform: scale(1.1) rotate(-5deg);
}

.kontak-card h4 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.kontak-card > p {
    font-size: 0.88rem;
    color: var(--color-text-light);
    margin-bottom: 16px;
    word-break: break-word;
}

.kontak-action {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent-dark);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
    margin-top: auto;
}

.kontak-card:hover .kontak-action {
    gap: 12px;
}

/* ---------- FOOTER ---------- */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 60px 30px 30px;
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-logo .logo-text {
    color: var(--color-white);
}

.footer-quote {
    font-style: italic;
    color: rgba(255, 255, 255, 0.75);
    font-size: 1rem;
    margin-bottom: 30px;
    font-family: var(--font-heading);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.social-link {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: var(--transition);
    font-size: 1rem;
}

.social-link:hover {
    background: var(--color-accent);
    transform: translateY(-5px);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-bottom p {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: 6px;
}

.footer-campus {
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8) !important;
}

/* ---------- BACK TO TOP ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(201, 169, 97, 0.4);
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 28px rgba(201, 169, 97, 0.5);
}

/* ---------- RESPONSIVE DESIGN ---------- */
@media (max-width: 1024px) {
    .home-title {
        font-size: 2.6rem;
    }

    .image-frame {
        width: 320px;
        height: 420px;
    }

    .kontak-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
        height: 65px;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 65px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        padding: 20px 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }

    .menu-toggle:checked ~ .nav-menu {
        transform: translateY(0);
    }

    .menu-toggle:checked ~ .hamburger span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .menu-toggle:checked ~ .hamburger span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle:checked ~ .hamburger span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: 14px 30px;
    }

    .nav-link::after {
        display: none;
    }

    .home-section {
        padding: 90px 20px 40px;
    }

    .home-container {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }

    .home-content {
        order: 2;
    }

    .home-image {
        order: 1;
    }

    .home-title {
        font-size: 2.1rem;
    }

    .home-subtitle {
        font-size: 1rem;
    }

    .home-description {
        margin-left: auto;
        margin-right: auto;
    }

    .home-buttons {
        justify-content: center;
    }

    .image-frame {
        width: 280px;
        height: 360px;
    }

    .section-title {
        font-size: 2rem;
    }

    .biodata-section,
    .galeri-section,
    .kontak-section {
        padding: 70px 20px;
    }

    .biodata-card {
        padding: 28px 20px;
    }

    .biodata-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .alasan-item {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .alasan-number {
        align-self: center;
    }

    .galeri-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .kontak-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .footer {
        padding: 40px 20px 25px;
    }

    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .home-title {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.88rem;
        width: 100%;
        justify-content: center;
    }

    .home-buttons {
        flex-direction: column;
    }

    .card-header {
        flex-direction: column;
        text-align: center;
    }

    .image-frame {
        width: 240px;
        height: 320px;
    }
}