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

.expertise-card .menu-container {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
}

:root {
    --light-bg: #ffffff;
    --light-text: #555555;
    --light-title: #000000;
    --dark-bg: #1a1a1a;
    --dark-text: #cccccc;
    --dark-title: #ffffff;
    --nav-bg-light: rgba(255, 255, 255, 0.85);
    --nav-bg-dark: rgba(30, 30, 30, 0.9);
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--light-bg);
    color: var(--light-text);
    transition: background 0.3s, color 0.3s;
    overflow-x: hidden;
}

body.dark-theme {
    background: var(--dark-bg);
    color: var(--dark-text);
}

body.dark-theme .title {
    color: var(--dark-title);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

p {
    color: rgb(85, 85, 85);
}

body.dark-theme p {
    color: var(--dark-text);
}

a, .btn {
    transition: all 300ms ease;
}

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

body.dark-theme a {
    color: var(--dark-text);
}

a:hover {
    color: grey;
    text-decoration: underline;
    text-underline-offset: 1rem;
    text-decoration-color: rgb(181, 181, 181);
}

/* NAVIGATION */
nav, .nav-links {
    display: flex;
}

nav {
    justify-content: space-around;
    align-items: center;
    height: 17vh;
}

.nav-links {
    gap: 2rem;
    list-style: none;
    font-size: 1.5rem;
    align-items: center;
}

.logo {
    height: 2rem;
    width: auto;
}

.logo:hover {
    cursor: pointer;
}

body.dark-theme .logo {
    filter: invert(1);
}

.theme-toggle {
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    color: black;
    padding: 0;
}

body.dark-theme .theme-toggle {
    color: white;
}

/* HAMBURGER MENU */
#hamburger-nav {
    display: none;
}

.hamburger-menu {
    position: relative;
    display: inline-block;
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 24px;
    width: 30px;
    cursor: pointer;
}

.hamburger-icon span {
    width: 100%;
    height: 2px;
    background-color: black;
    transition: all 0.3s ease-in-out;
}

body.dark-theme .hamburger-icon span {
    background-color: white;
}

.menu-links {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--nav-bg-light);
    backdrop-filter: blur(15px);
    width: fit-content;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease-in-out;
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

body.dark-theme .menu-links {
    background-color: var(--nav-bg-dark);
}

.menu-links a, .menu-links button { 
    width: 100%;
    display: block;
    padding: 10px;
    text-align: center;
    font-size: 1.5rem;
    color: black;
    text-decoration: none;
    transition: all 0.3s ease-in-out;
}

body.dark-theme .menu-links a, body.dark-theme .menu-links button {
    color: var(--dark-text);
}

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

.menu-links.open {
    max-height: 300px;
}

.hamburger-icon.open span:first-child {
    transform: rotate(45deg) translate(10px, 5px);
}
.hamburger-icon.open span:nth-child(2) {
    opacity: 0;
}
.hamburger-icon.open span:last-child {
    transform: rotate(-45deg) translate(10px, -5px);
}

/* SECTIONS & TITLES */
section {
    padding-top: 4vh;
    margin: 0 10rem;
    box-sizing: border-box;
    min-height: fit-content;
    position: relative;
}

.section__text__p1 {
    text-align: center;
    font-weight: 600;
}

.title {
    font-size: 3rem;
    text-align: center;
    color: var(--light-title);
}

/* EXPERIENCE PAGE SPECIFIC STYLES */
#experience, #expertise-section {
    padding-bottom: 4rem;
    position: relative; 
}

.certificate-date {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 1rem;
}

body.dark-theme .certificate-date {
    color: #aaa;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
    justify-content: center;
}

.tag {
    background-color: #e0e0e0;
    color: #333;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 500;
}

body.dark-theme .tag {
    background-color: #3a3a3a;
    color: #ddd;
}

.achievement-highlight {
    font-style: italic;
    color: #007bff;
    margin: 1rem 0;
}

body.dark-theme .achievement-highlight {
    color: #58a6ff;
}

/* CARD FOOTER & LINKS */
.project-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 1rem;
    width: 100%;
}

.project-card-footer.center-footer {
    justify-content: center;
}

.read-more-link {
    color: black;
    text-decoration: none;
    font-weight: 600;
}

body.dark-theme .read-more-link {
    color: var(--dark-text);
}

.read-more-link:hover {
    text-decoration: underline;
}

.project-btn {
    width: auto;
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

/* MENU STYLES */
.details-container {
    position: relative;
}

.menu-container {
    position: relative;
    display: inline-block;
}

.details-container .menu-container {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
}

.menu-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    transition: background-color 0.3s;
}

body.dark-theme .menu-btn {
    color: var(--dark-text);
}

.menu-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

body.dark-theme .menu-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.options-menu {
    position: absolute;
    right: 0;
    top: 100%;
    background-color: var(--light-bg);
    border: 1px solid #ccc;
    border-radius: 0.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: none;
    flex-direction: column;
    min-width: 140px;
    z-index: 100;
    overflow: hidden;
}

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

body.dark-theme .options-menu {
    background-color: #2d2d2d;
    border-color: #555;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.menu-option {
    background: none;
    border: none;
    padding: 0.75rem 1rem;
    text-align: left;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--light-text);
    width: 100%;
    transition: background-color 0.2s;
}

body.dark-theme .menu-option {
    color: var(--dark-text);
}

.menu-option:hover {
    background-color: #f0f0f0;
}

body.dark-theme .menu-option:hover {
    background-color: #3a3a3a;
}

/* EXPERIENCE CARDS */
.experience-details-container {
    max-width: 1200px;
    margin: 2rem auto 0 auto;
}

.about-containers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.details-container {
    padding: 1.5rem;
    background: white;
    border-radius: 2rem;
    border: 1px solid rgb(163, 163, 163);
    text-align: center;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out, opacity 0.5s ease;
}

.details-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.details-container:has(.options-menu.open) {
    z-index: 20;
}

body.dark-theme .details-container {
    background: #2d2d2d;
    border-color: #555;
}

body.dark-theme .details-container:hover {
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.1);
}

.certificate-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem auto;
    object-fit: contain;
}

.experience-sub-title {
    margin-bottom: 1rem;
    color: var(--light-title);
    font-size: 1.25rem;
}

body.dark-theme .experience-sub-title {
    color: var(--dark-title);
}

.details-container p {
    flex-grow: 1;
}

/* BUTTONS & ICONS */
.btn-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: auto;
    padding-top: 1rem;
}

.btn {
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.75rem 1.25rem;
    border-radius: 2rem;
    cursor: pointer;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.btn-color-1 {
    border: 1px solid rgb(53, 53, 53);
    background: rgb(53, 53, 53);
    color: white;
}
.btn-color-1:hover {
    background: rgb(0, 0, 0);
}
.btn-color-2 {
    border: 1px solid rgb(53, 53, 53);
    background: none;
    color: black;
}
.btn-color-2:hover {
    background: rgb(53, 53, 53);
    color: white;
}
body.dark-theme .btn-color-1 {
    border: 1px solid #ffffff;
    background: #333333;
    color: white;
}
body.dark-theme .btn-color-1:hover {
    background: #ffffff;
    color: #000000;
}
body.dark-theme .btn-color-2 {
    border: 1px solid #ffffff;
    background: none;
    color: white;
}
body.dark-theme .btn-color-2:hover {
    background: #ffffff;
    color: #000000;
}

.icon {
    cursor: pointer;
    height: 2rem;
}

body.dark-theme .arrow,
body.dark-theme .contact-icon {
    filter: invert(1);
}

.scroll-down-link, .scroll-up-link {
    display: inline-block;
    position: absolute;
    bottom: 2.5rem;
    right: -5rem;
}

.arrow {
    width: 30px;
    height: 30px;
}

/* CONTACT & FOOTER */
#contact {
    display: flex;
    justify-content: center;
    flex-direction: column;
    padding-top: 7vh;
    min-height: 70vh;
    position: relative;
}

.contact-form-container { display: flex; justify-content: center; margin-bottom: 2rem; width: 100%; }
#contact-form { display: flex; flex-direction: column; gap: 1.5rem; width: 100%; max-width: 600px; background: rgb(250, 250, 250); border: 1px solid rgb(163, 163, 163); border-radius: 2rem; padding: 2rem; box-shadow: 0 5px 15px rgba(0,0,0,0.1); }
body.dark-theme #contact-form { background: #2d2d2d; border-color: #555; }
.form-group { display: flex; flex-direction: column; }
.form-group label { font-weight: 600; margin-bottom: 0.5rem; color: var(--light-title); }
body.dark-theme .form-group label { color: var(--dark-title); }
.form-group input, .form-group textarea { padding: 0.75rem; border: 1px solid rgb(163, 163, 163); border-radius: 0.5rem; font-family: inherit; font-size: 1rem; background: var(--light-bg); color: var(--light-text); }
body.dark-theme .form-group input, body.dark-theme .form-group textarea { background: #3a3a3a; border-color: #666; color: var(--dark-text); }
.form-group button { width: 100%; }

/* Form Status Message Styling */
#form-status {
    padding: 0.75rem 1rem;
    margin-top: 1rem;
    border-radius: 0.5rem;
    text-align: center;
    font-weight: 500;
    display: none; /* Hidden by default */
    transition: all 0.3s ease;
}
#form-status.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}
#form-status.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}
/* Dark Theme Adjustments */
body.dark-theme #form-status.success {
    background-color: #1a3a22;
    color: #a7d7b7;
    border-color: #2a5c3d;
}
body.dark-theme #form-status.error {
    background-color: #4d1f24;
    color: #f5c6cb;
    border-color: #843534;
}

.contact-info-upper-container {
    display: flex;
    justify-content: center;
    border-radius: 2rem;
    border: 1px solid rgb(163, 163, 163);
    background: rgb(250, 250, 250);
    margin: 2rem auto;
    padding: 0.5rem;
}
body.dark-theme .contact-info-upper-container {
    background: #2d2d2d;
    border-color: #555;
}
.contact-info-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 1rem;
}
.contact-info-container p {
    font-size: larger;
}
.contact-icon {
    cursor: default;
}
.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}
.contact-link:hover {
    text-decoration: underline;
}
.contact-text {
    font-size: larger;
}

.scroll-up {
    position: absolute;
    right: -0.25rem;
    bottom: 2.5rem;
}

footer {
    height: 26vh;
    margin: 0 1rem;
}

footer p {
    text-align: center;
}

.fade-in-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.hidden {
    display: none;
}

.visually-hidden { 
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; 
}


/* ANIMATIONS */
@keyframes gentle-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

#main-content {
  animation: gentle-fade-in 0.7s ease-out forwards;
}

/* TOAST NOTIFICATION */
.toast-notification {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background-color: rgba(30, 30, 30, 0.95);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    pointer-events: none;
    text-align: center;
    max-width: 90vw;
}

.toast-notification.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

body.dark-theme .toast-notification {
    background-color: rgba(240, 240, 240, 0.95);
    color: #1a1a1a;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

/* TOOLTIPS */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-5px);
    background-color: rgba(30, 30, 30, 0.9);
    color: #fff;
    padding: 0.4rem 0.8rem;
    border-radius: 0.4rem;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease;
    pointer-events: none;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    margin-bottom: 5px;
}

[data-tooltip]:hover::before,
[data-tooltip]:focus-visible::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-10px);
}

body.dark-theme [data-tooltip]::before {
    background-color: rgba(220, 220, 220, 0.9);
    color: #000;
    box-shadow: 0 2px 5px rgba(255,255,255,0.1);
}

nav [data-tooltip]::before {
    bottom: auto;
    top: 100%;
    transform: translateX(-50%) translateY(5px);
    margin-bottom: 0;
    margin-top: 5px;
}

nav [data-tooltip]:hover::before,
nav [data-tooltip]:focus-visible::before {
    transform: translateX(-50%) translateY(10px);
}

@media (hover: none), screen and (max-width: 600px) {
    [data-tooltip]::before {
        display: none;
    }
}

/* COLLECTION CARDS (Project styling) */
.project-details-container { max-width: 1200px; margin: 2rem auto 0 auto; }
.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 2rem; }
.project-img { width: 100%; height: 200px; object-fit: cover; border-radius: 1rem; display: block; transition: transform 0.3s ease; }
.details-container figure { position: relative; margin: 0 0 1rem 0; border-radius: 1rem; overflow: hidden; }
.details-container figure::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.4) 50%, rgba(0,0,0,0) 100%); pointer-events: none; }
.details-container figcaption { position: absolute; bottom: 0; left: 0; width: 100%; padding: 1.5rem; z-index: 2; text-align: left; }
figcaption .experience-sub-title.project-title { margin-bottom: 0; color: #ffffff !important; font-size: 1.5rem; font-weight: 600; text-shadow: 0 2px 4px rgba(0,0,0,0.6); }
body.dark-theme figcaption .experience-sub-title.project-title { color: #ffffff !important; }
.details-container:hover .project-img { transform: scale(1.05); }

.status-wrapper { position: absolute; top: 0; left: 0; width: 150px; height: 150px; overflow: hidden; border-top-left-radius: 2rem; pointer-events: none; z-index: 10; }
.status-tag { position: absolute; top: 1.5rem; left: -45px; transform: rotate(-45deg); padding: 0.2rem 3rem; font-size: 0.75rem; font-weight: 600; color: white; box-shadow: 0 2px 5px rgba(0,0,0,0.2); }
.status-collection { background-color: #6f42c1; }

.tech-stack { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0; justify-content: center; }
.tech-tag { background-color: #e0e0e0; color: #333; padding: 0.25rem 0.75rem; border-radius: 1rem; font-size: 0.8rem; font-weight: 500; }
body.dark-theme .tech-tag { background-color: #3a3a3a; color: #ddd; }

/* SECTION DIVIDER & HEADINGS */
.section-divider { border: 0; border-top: 1px solid #ddd; margin: 3.5rem 0; }
body.dark-theme .section-divider { border-top-color: #444; }
.category-title { font-size: 2rem; margin-bottom: 1.5rem; text-align: left; color: var(--light-title); }
body.dark-theme .category-title { color: var(--dark-title); }

/* EXPERTISE SECTION */
.expertise-focus { text-align: center; font-weight: 600; color: #007bff; margin-bottom: 2rem; font-size: 1.1rem; }
body.dark-theme .expertise-focus { color: #58a6ff; }
.expertise-intro { text-align: center; color: var(--light-text); max-width: 700px; margin: -1.5rem auto 3rem auto; font-size: 1.05rem; line-height: 1.6; }
body.dark-theme .expertise-intro { color: var(--dark-text); }
.expertise-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; max-width: 1200px; margin: 0 auto; }
.expertise-card { background: rgb(250, 250, 250); border: 1px solid rgb(163, 163, 163); border-radius: 1.5rem; padding: 2rem; text-align: left; display: flex; flex-direction: column; transition: transform 0.3s ease; position: relative; }
.expertise-card:has(.options-menu.open) { z-index: 20; }
.expertise-card.highlighted-expertise { border: 2px solid #007bff; box-shadow: 0 4px 15px rgba(0, 123, 255, 0.08); }
.expertise-card:hover { transform: scale(1.02) translateY(-5px); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15); }
body.dark-theme .expertise-card { background: #2d2d2d; border-color: #555555; }
body.dark-theme .expertise-card.highlighted-expertise { border-color: #58a6ff; box-shadow: 0 4px 15px rgba(88, 166, 255, 0.1); }
body.dark-theme .expertise-card:hover { box-shadow: 0 10px 30px rgba(255, 255, 255, 0.12); }
.expertise-title { font-size: 1.35rem; font-weight: 600; margin-bottom: 1.25rem; color: var(--light-title); }
body.dark-theme .expertise-title { color: var(--dark-title); }
.expertise-skills { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.expertise-proof { list-style-type: disc; padding-left: 1.2rem; color: var(--light-text); }
body.dark-theme .expertise-proof { color: var(--dark-text); }
.expertise-proof li { margin-bottom: 0.6rem; font-size: 0.95rem; line-height: 1.6; max-width: 96%; }
.expertise-work { margin-top: auto; padding-top: 1.5rem; font-size: 0.9rem; color: var(--light-text); border-top: 1px solid #e0e0e0; }
body.dark-theme .expertise-work { color: var(--dark-text); border-top-color: #444; }
.expertise-link { color: #0069d9; font-weight: 600; text-decoration: none; transition: color 0.3s ease, text-decoration 0.3s ease; }
body.dark-theme .expertise-link { color: #58a6ff; }
.expertise-link:hover { text-decoration: underline; text-underline-offset: 3px; color: #004085; }
body.dark-theme .expertise-link:hover { color: #79b8ff; }

.scroll-down-link, .scroll-up-link {
    display: inline-block;
    position: absolute;
    bottom: 2.5rem;
    right: -5rem;
}

.scroll-down-link:hover .arrow, .scroll-up-link:hover .arrow {
    transform: scale(1.1) !important;
    transition: transform 0.2s ease-in-out;
}

/* Utility classes to replace inline styles */
.mt-3 {
    margin-top: 3rem !important;
}
.mb-2 {
    margin-bottom: 2rem !important;
}