/* 1. CSS VARIABLES & THEMES */
@property --p {
  syntax: '<integer>';
  inherits: false;
  initial-value: 0;
}

:root {
    --bg-color: #0a192f;
    --second-bg-color: #112240;
    --text-color: #ccd6f6;
    --main-color: #64ffda; /* Neon Accent */
    --main-hover-color: #52d3bc;
    --border-color: rgba(100, 255, 218, 0.1);
    --shadow-color: rgba(2, 12, 27, 0.7);
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Roboto Mono', monospace;
}

.light-mode {
    --bg-color: #f0f2f5;
    --second-bg-color: #ffffff;
    --text-color: #333333;
    --main-color: #007bff; /* Professional Blue */
    --main-hover-color: #0056b3;
    --border-color: rgba(0, 123, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* 2. GENERAL & RESET STYLES */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    border: none;
    outline: none;
    scroll-behavior: smooth;
    font-family: var(--font-primary);
}

html {
    font-size: 62.5%;
    overflow-x: hidden;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    transition: background 0.3s, color 0.3s;
}

section {
    min-height: 100vh;
    padding: 10rem 9% 2rem;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.section-title {
    font-size: 4.2rem;
    margin-bottom: 4rem;
    text-align: center;
}

.section-title span {
    color: var(--main-color);
}

/* 3. HEADER & NAVIGATION */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 9%;
    background: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s;
}

.light-mode .header {
    background: rgba(255, 255, 255, 0.85);
}

/* Animated AU Logo */
.logo {
    font-family: 'Audiowide', sans-serif;
    font-size: 3.5rem; /* Increased font size for impact */
    color: transparent; /* Start as transparent for the outline effect */
    -webkit-text-stroke: 1px var(--main-color); /* Sharper stroke for this font */
    text-decoration: none;
    position: relative;
    animation: fadeInLogo 1s ease-out 0.5s forwards; /* Added a delay */
    opacity: 0;
    transition: color 0.4s ease, transform 0.4s ease, text-shadow 0.4s ease;
}

.logo:hover {
    color: var(--main-color); /* Fill color on hover */
    transform: scale(1.05); /* Subtle scale effect */
    text-shadow: 0 0 8px var(--main-color); /* Add a subtle glow */
}

@keyframes fadeInLogo { from { opacity: 0; transform: translateY(-15px); } to { opacity: 1; transform: translateY(0); } }

.navbar a {
    font-size: 1.7rem;
    color: var(--text-color);
    margin-left: 4rem;
    transition: color 0.3s;
}

.navbar a:hover,
.navbar a.active {
    color: var(--main-color);
}

.header-right {
    display: flex;
    align-items: center;
}

#theme-toggle {
    font-size: 2.4rem;
    color: var(--text-color);
    cursor: pointer;
    margin-right: 2rem;
}

#menu-icon {
    font-size: 3.6rem;
    color: var(--text-color);
    display: none;
    cursor: pointer;
}

/* 4. HERO SECTION */
.hero {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 70rem;
}

.hero-content h1 {
    font-size: 5.6rem;
    font-weight: 700;
    line-height: 1.3;
}

.hero-content h3 {
    font-size: 3.2rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.hero-content h3 .typed-text {
    color: var(--main-color);
}

.hero-content p {
    font-size: 1.7rem;
    margin-bottom: 4rem;
}

.btn {
    display: inline-block;
    padding: 1.2rem 2.8rem;
    background: var(--main-color);
    border-radius: 4rem;
    box-shadow: 0 0 1rem var(--main-color);
    font-size: 1.6rem;
    color: var(--bg-color);
    letter-spacing: .1rem;
    font-weight: 600;
    transition: box-shadow 0.3s, background 0.3s;
}

.btn:hover {
    box-shadow: 0 0 2.5rem var(--main-color);
    background: var(--main-hover-color);
}

/* 5. ABOUT SECTION */
.about {
    background: var(--second-bg-color);
}

.about-content {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.about-img img {
    width: 35vw;
    max-width: 400px;
    border-radius: 50%;
    box-shadow: 0 0 2rem var(--main-color);
}

.about-text {
    flex: 1;
}

.about-text h4 {
    font-size: 2.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.about-text p {
    font-size: 1.7rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.about-badges {
    margin-top: 4rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.badge-item {
    display: flex;
    align-items: center;
    background: var(--bg-color);
    padding: 1rem 1.5rem;
    border-radius: 0.8rem;
    border: 1px solid var(--border-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.badge-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.badge-item img {
    width: 40px;
    height: 40px;
    margin-right: 1.5rem;
}

.badge-item span {
    font-size: 1.4rem;
    font-weight: 600;
}



.skills-instruction {
    display: none; /* Hidden by default on desktop */
    text-align: center;
    font-size: 1.6rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-bottom: 3rem;
    font-style: italic;
}


.skills-container {
    display: flex;
    flex-wrap: wrap;
    /* justify-content: center;   IMPORTANT */
    gap: 25px;                 /* controls spacing */
    margin-bottom: 40px;
}

.skill-card {
    background-color: transparent;
    flex: 0 0 230px;   /* fixed clean width */
    height: 18rem;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.skill-card.animated {
    opacity: 1;
    transform: translateY(0);
}

.skill-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

/* The flip is now controlled by a JS class */
.skill-card-inner.is-flipped {
    transform: rotateY(180deg);
}

.skill-card-front, .skill-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 1.5rem;
    background: var(--second-bg-color);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.skill-card-back {
    transform: rotateY(180deg);
}

.skill-card-front i {
    font-size: 5rem;
    color: var(--main-color);
}

.progress-circle {
    width: 15rem;
    height: 15rem;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: 
        radial-gradient(closest-side, var(--bg-color) 79%, transparent 80% 100%),
        conic-gradient(var(--main-color) calc(var(--p) * 1%), var(--second-bg-color) 0);
    margin: 0 auto 1.5rem auto;
    transition: --p 2.5s ease-in-out;
}

.progress-value {
    font-size: 2.8rem;
    font-weight: 700;
    font-family: var(--font-secondary);
    color: var(--text-color);
}

.skill-card-front h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-color);
}

/* 6. STARTUP SECTION */
.startup-content {
    display: flex;
    align-items: center;
    gap: 4rem;
    background: var(--second-bg-color);
    padding: 4rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

.startup-logo img {
    width: 200px; /* Made the logo slightly larger */
    height: auto; /* Maintain aspect ratio */
    border-radius: 1rem; /* Use rounded corners instead of a circle */
    box-shadow: 0 0 2rem var(--main-color);
}

.startup-details h3 {
    font-size: 2.8rem;
    color: var(--main-color);
    margin-bottom: 1.5rem;
}

.startup-details p {
    font-size: 1.7rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.project-links i {
    margin-right: 0.5rem;
}

/* 7. CONTACT SECTION */
.contact {
    background: var(--second-bg-color);
}

.contact-content {
    display: flex;
    gap: 4rem;
    align-items: flex-start;
}

.contact-form {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1.5rem;
    font-size: 1.6rem;
    color: var(--text-color);
    background: var(--bg-color);
    border-radius: .8rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.contact-form textarea {
    resize: vertical;
}

.contact-form button {
    cursor: pointer;
}

#form-status {
    margin-top: 1.5rem;
    font-size: 1.6rem;
    font-weight: 600;
    text-align: center;
}

#form-status.success {
    color: var(--main-color);
}

#form-status.error {
    color: #ff4d4d; /* A suitable error color */
}

.contact-info {
    flex: 1;
}

.contact-info p {
    font-size: 1.7rem;
    line-height: 1.7;
    margin-bottom: 3rem;
}

.contact-details {
    margin-bottom: 3rem;
}

.contact-detail-item {
    display: inline-flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.contact-detail-item i {
    font-size: 2.5rem;
    color: var(--main-color);
    margin-right: 1.5rem;
}

.contact-detail-item a {
    font-size: 1.7rem;
    color: var(--text-color);
    transition: color 0.3s;
}

.contact-detail-item a:hover {
    color: var(--main-color);
}

/* 8. FOOTER */
.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: 2rem 9%;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

.footer-text p {
    font-size: 1.6rem;
}

.footer-social-icons a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 4rem;
    height: 4rem;
    background: transparent;
    border: .2rem solid var(--main-color);
    border-radius: 50%;
    font-size: 2rem;
    color: var(--main-color);
    margin-left: 1.5rem;
    transition: 0.5s ease;
}

.footer-social-icons a:hover {
    background: var(--main-color);
    color: var(--bg-color);
    box-shadow: 0 0 1rem var(--main-color);
}

.footer-icon-top a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: .8rem;
    background: var(--main-color);
    border-radius: .8rem;
    transition: .5s ease;
}

.footer-icon-top a:hover {
    box-shadow: 0 0 1rem var(--main-color);
}

.footer-icon-top a i {
    font-size: 2.4rem;
    color: var(--second-bg-color);
}

/* 9. PARTICLE.JS BACKGROUND */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

/* 10. SUB-PAGES (CERTIFICATIONS & PROJECTS) */
.page-section {
    background: var(--second-bg-color);
    /* Override the default section animation for immediate visibility on page load */
    opacity: 1;
    transform: translateY(0);
    animation: fadeInPageContent 0.6s ease-out;
}

@keyframes fadeInPageContent {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cert-snapshot-container {
    background: var(--bg-color);
    padding: 4rem;
    border-radius: 1rem;
    margin-bottom: 6rem;
    text-align: center;
    border: 1px solid var(--border-color);
}

.snapshot-title {
    font-size: 3.2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.snapshot-intro {
    font-size: 1.7rem;
    max-width: 70rem;
    margin: 0 auto 3rem auto;
    opacity: 0.8;
}

.snapshot-grid {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.snapshot-card {
    background: var(--second-bg-color);
    padding: 2rem 3rem;
    border-radius: 1rem;
    text-align: center;
    flex-basis: 220px;
}

.snapshot-card h3 {
    font-size: 4.2rem;
    color: var(--main-color);
    font-family: var(--font-secondary);
}

.snapshot-card p {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Custom Select Dropdown Styles */
.custom-select-wrapper {
    margin-bottom: 4rem;
    display: flex;
    justify-content: center;
    position: relative;
    user-select: none;
    width: 100%;
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

.custom-select {
    position: relative;
    width: 100%;
}

.custom-select__trigger {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 2rem;
    font-size: 1.6rem;
    font-weight: 600;
    background-color: var(--second-bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4rem;
    cursor: pointer;
    transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

/* Only apply hover lift when the dropdown is NOT open */
.custom-select:not(.open) .custom-select__trigger:hover {
    transform: translateY(-3px);
    border-color: var(--main-color);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.custom-select.open .custom-select__trigger {
    border-color: var(--main-color);
    box-shadow: 0 0 0.8rem var(--main-color);
}

.arrow {
    position: relative;
    height: 10px;
    width: 10px;
}

.arrow::before, .arrow::after {
    content: "";
    position: absolute;
    bottom: 0px;
    width: 0.15rem;
    height: 100%;
    background-color: var(--main-color);
    transition: all 0.3s;
}

.arrow::before {
    left: -2px;
    transform: rotate(-45deg);
}

.arrow::after {
    left: 2px;
    transform: rotate(45deg);
}

.custom-select.open .arrow::before {
    transform: rotate(45deg);
}

.custom-select.open .arrow::after {
    transform: rotate(-45deg);
}

.custom-options {
    position: absolute;
    top: 110%;
    left: 0;
    right: 0;
    background-color: var(--second-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    z-index: 2;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.custom-select.open .custom-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.custom-option {
    display: block;
    padding: 1.2rem 2rem;
    font-size: 1.6rem;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.custom-option:hover, .custom-option.selected {
    background-color: var(--main-color);
    color: var(--bg-color);
}
.certificate-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
}

.cert-item.hidden {
    display: none;
}

.cert-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cert-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.cert-item img {
    width: 100%;
    height: auto;
    aspect-ratio: 16/11;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}

.cert-item h4 {
    font-size: 1.8rem;
    padding: 1.5rem;
    font-weight: 600;
}

.timeline-section {
    margin-bottom: 6rem;
}

.timeline-section .category-title {
    text-align: left;
    border-bottom: none;
    font-size: 3.2rem;
    margin-bottom: 3rem;
}

.timeline-section .category-title i {
    margin-right: 1rem;
}

.timeline {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: var(--main-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
    border-radius: 3px;
}
/* ===== Desktop Category Heading ===== */
.skills-category {
    font-size: 1.8rem;
    margin: 50px 0 20px;
    color: var(--main-color);
    text-align: left;
    border-left: 4px solid var(--main-color);
    padding-left: 12px;
    display: block;
    position: relative;
}

/* Disable underline animation by default */
.skills-category::after {
    content: none;
}


.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    right: -17px;
    background-color: var(--bg-color);
    border: 4px solid var(--main-color);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(even)::after {
    left: -16px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: var(--bg-color);
    position: relative;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.timeline-content h3 {
    font-size: 2.2rem;
    color: var(--main-color);
    margin-bottom: 0.5rem;
}

.timeline-content .timeline-sub {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-content .timeline-date {
    display: block;
    font-size: 1.4rem;
    font-family: var(--font-secondary);
    opacity: 0.7;
    margin-bottom: 1.5rem;
}

.timeline-content p:not(.timeline-sub) {
    font-size: 1.6rem;
    line-height: 1.7;
}

.project-gallery {
    display: grid;
    gap: 5rem;
}

.project-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    background: var(--bg-color);
    padding: 3rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

/* Alternate project item layout for visual variety */
.project-item:nth-child(odd) .project-item-img {
    order: 1;
}

.project-item-img img {
    width: 100%;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.project-item-details h3 {
    font-size: 2.8rem;
    color: var(--main-color);
    margin-bottom: 1.5rem;
}
.project-item-details p {
    font-size: 1.7rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}
.project-links .btn {
    margin-right: 1rem;
    margin-bottom: 1rem;
}

/* NEW: LIGHTBOX STYLES */
.cert-item img {
    cursor: pointer;
}

.lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 80%;
    max-height: 80%;
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from {transform: scale(0.8);}
    to {transform: scale(1);}
}

.lightbox-close {
    position: absolute;
    top: 3rem;
    right: 4.5rem;
    color: #fff;
    font-size: 5rem;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: #bbb;
    text-decoration: none;
}

/* ===================================== */
/* 11. RESPONSIVENESS (FIXED & CLEANED) */
/* ===================================== */
@media (max-width: 1200px) {
   html {
       font-size: 55%;
   }
}
/* ================= 991px ================= */
@media (max-width: 991px) {
   .header {
       padding: 2rem 3%;
   }
   section {
       padding: 10rem 3% 2rem;
   }
   /* FIXED: Proper centering */
   .about-content,
   .startup-content,
   .contact-content {
       flex-direction: column;
       align-items: center;  /* FIXED */
       justify-content: center;
       text-align: center;
   }
   .about-img img {
       width: 70vw;
       margin-bottom: 2rem;
   }
   .startup-logo img {
       margin-bottom: 2rem;
   }
   .about-badges {
       justify-content: center;
   }
   .skills-instruction {
       display: block;
       text-align: center;
   }
   /* Timeline Mobile Fix */
   .timeline::after {
       left: 31px;
   }
   .timeline-item {
       width: 100%;
       padding-left: 70px;
       padding-right: 25px;
   }
   .timeline-item:nth-child(even) {
       left: 0;
   }
   .timeline-item::after {
       left: 15px;
       right: auto;
   }
   .timeline-item:nth-child(even)::after {
       left: 15px;
   }
}
/* ================= 768px ================= */
@media (max-width: 768px) {
   #menu-icon {
       display: block;
   }
   .navbar {
       position: absolute;
       top: 100%;
       left: 0;
       width: 100%;
       padding: 1rem 3%;
       background: var(--bg-color);
       border-top: 1px solid var(--border-color);
       display: none;
   }
   .navbar.active {
       display: block;
   }
   .navbar a {
       display: block;
       font-size: 2rem;
       margin: 2rem 0;
       text-align: center;
   }
   .hero-content h1 {
       font-size: 4.2rem;
   }
   .hero-content h3 {
       font-size: 2.4rem;
   }
   /* ===== SKILLS FIX ===== */
   .skills {
       text-align: center;
   }
   .skills-container {
       display: grid !important;
       grid-template-columns: 1fr;
       justify-items: center;
       gap: 2rem;
       width: 100%;
   }
   .skill-card {
       width: 90%;
       max-width: 320px;
       margin: 0 auto;
   }
   /* ===== STARTUP CENTER ===== */
   .startup-content {
       padding: 3rem 2rem;
   }
   /* ===== CONTACT FIX ===== */
   .contact-form {
       width: 100%;
       max-width: 400px;
       margin: 0 auto;
   }
   .contact-info {
       text-align: center;
   }
   .contact-detail-item {
       justify-content: center;
   }
   .project-item {
       grid-template-columns: 1fr;
   }
   .project-item:nth-child(odd) .project-item-img {
       order: 0;
   }
   .footer {
       flex-direction: column-reverse;
       gap: 2rem;
       text-align: center;
   }
}
/* ================= 480px ================= */
@media (max-width: 480px) {
   section {
       padding: 8rem 5% 2rem;
   }
   .about-img img {
       width: 80vw;
   }
   .skill-card {
       width: 85%;
       max-width: 300px;
       height: 14rem;
   }
   .progress-circle {
       width: 10rem;
       height: 10rem;
   }
   /* Mobile Skills Heading */
   .skills-category {
       text-align: center;
       border-left: none;
       padding-left: 0;
       margin: 35px 0 20px;
       display: inline-block;
   }
   .skills-category::after {
       content: "";
       display: block;
       width: 50%;
       height: 3px;
       margin: 6px auto 0;
       background: var(--main-color);
       border-radius: 2px;
   }
}