/* GLOBAL */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    overflow-x: hidden;
    font-family: 'Inter', sans-serif;
    background: var(--bg, #ffffff);
    color: var(--text, #111111);
    transition: all 0.3s ease;
}

/* VARIABLES */
:root {
    --bg: #ffffff;
    --text: #111111;
    --accent: #0077ff;
    --card: rgba(0,0,0,0.04);
}

/* DARK THEME */
body.dark {
    --bg: #0e0e0e;
    --text: #f5f5f5;
    --accent: #00bfff;
    --card: rgba(255,255,255,0.05);
}

/* SECTIONS */
.section {
    min-height: 100vh;
    padding: 150px 80px 100px 80px;
    transition: background 0.5s ease;
}

/* ALT SECTION */
.section.alt {
    /* light overlay for bright theme */
}

/* HERO */
.hero h1 {
    font-size: 64px;
    font-weight: 700;
}
.hero h1 span {
    color: var(--accent);
}
.subtitle {
    font-size: 20px;
    margin-top: 10px;
    opacity: 0.8;
}
.hero-buttons { margin-top: 30px; }
.btn {
    padding: 12px 24px;
    margin-right: 15px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}
.btn.primary { background: var(--accent); color: white; }
.btn.outline { border: 2px solid var(--accent); color: var(--accent); }

/* GRID CARDS */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}
.card {
    background: var(--card);
    padding: 30px;
    border-radius: 12px;
    transition: all 0.3s ease;
}
.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

/* NAVBAR */
nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);

    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);

    padding: 12px 30px;
    border-radius: 50px;

    display: flex;
    justify-content: center;
    align-items: center;

    z-index: 1000;

    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

/* CENTER ITEMS */
.nav-center {
    display: flex;
    gap: 30px;
    align-items: center;
}

/* LINKS */
.nav-item {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: 0.3s;
}

nav:hover {
    box-shadow: 0 12px 35px rgba(0,0,0,0.2);
    transform: translateX(-50%) scale(1.02);
}

.nav-item:hover {
    color: #0077ff;
}

/* ACTIVE */
.nav-item.active {
    color: #0077ff;
}

/* THEME BUTTON */
.theme-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
}

/* HAMBURGER */
.hamburger {
    position: absolute;
    right: 20px;
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text);
    margin: 3px 0;
}

/* REVEAL ANIMATIONS */
.reveal { opacity: 0; transform: translateY(40px); transition: all 0.6s ease; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* CV MODAL */
.modal { display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%; overflow-y: auto; background-color: rgba(0,0,0,0.7); padding: 60px 20px; }
.modal-content { background: var(--bg); margin: auto; padding: 30px; border-radius: 12px; max-width: 800px; color: var(--text); position: relative; }
.close { position: absolute; top: 20px; right: 25px; color: var(--text); font-size: 30px; font-weight: bold; cursor: pointer; }
.cv-container h2, .cv-container h3 { color: var(--accent); }
.cv-container ul { margin: 10px 0 20px 20px; }
.cv-container {
    max-height: 70vh;
    overflow-y: auto;
    padding-right: 10px;
}
.cv-container ul { margin-left: 20px; }
.cv-container a.btn { margin-top: 20px; display: inline-block; }


/* BRIGHT THEME SECTION BACKGROUNDS */
body:not(.dark) #home { background: #f4faff; --section-accent: #0077ff; }
body:not(.dark) #projects { background: #fffaf4; --section-accent: #ff7f50; }
body:not(.dark) #experience { background: #f4fff9; --section-accent: #3cb371; }
body:not(.dark) #contact { background: #fff4f9; --section-accent: #ff69b4; }

/* DARK THEME SECTION */
body.dark #home,
body.dark #projects,
body.dark #experience,
body.dark #contact { background: var(--bg); --section-accent: var(--accent); }
body.dark nav {
    background: rgba(15, 23, 42, 0.7);
}

/* HAMBURGER */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}
.hamburger span {
    height: 3px;
    width: 25px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.3s;
}

/* Mobile menu */
@media screen and (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        background: var(--bg);
        position: fixed;
        top: 60px;
        right: -100%;
        width: 200px;
        height: calc(100vh - 60px);
        padding-top: 30px;
        transition: right 0.3s ease;
        gap: 20px;
        box-shadow: -4px 0 10px rgba(0,0,0,0.1);
        z-index: 1500;
    }
    .nav-links.active {
        right: 0;
    }

    .hamburger { display: flex; }

    nav {
        padding: 15px 20px;
    }
}

/* CV MODAL MOBILE OPTIMIZATION */
.modal-content {
    max-width: 95%;
    padding: 20px;
}
.cv-container {
    max-height: 80vh; /* more height on mobile */
}

.hero-content {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 60px;
    flex-wrap: nowrap;   /* THIS keeps them side-by-side */
}

/* Left side */
.hero-text {
    flex: 1;
    max-width: 60%;
}

/* Right side */
.hero-photo-container {
    flex: 0 0 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* HERO PHOTO CIRCLE */
.hero-photo {
    width: 200px;
    height: 200px;
    overflow: hidden;
    border-radius: 50%;
    border: 4px solid var(--accent);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

/* Subtle floating animation */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
    100% { transform: translateY(0px); }
}

.hero-photo {
    animation: float 5s ease-in-out infinite;
}

.hero-photo:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(0,0,0,0.25);
}

.hero-photo img {
    width: 100%;
    height: 100%;          /* fill square container */
    object-fit: cover;     /* crop image to fit square nicely */
}

.hero-contact {
    margin-top: 15px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 14px;
}

.hero-contact a,
.hero-contact span {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text);
    text-decoration: none;
    transition: color 0.3s ease, transform 0.2s ease;
}

.hero-contact a:hover {
    color: var(--accent);
    transform: translateX(4px);
}

.hero-contact i {
    color: var(--accent);
    font-size: 14px;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.project-card {
    padding: 20px;
    background: var(--bg);
    border: 2px solid var(--accent);
    border-radius: 10px;
    cursor: pointer;
    transition: 0.3s ease;
}

.project-card:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-5px);
}

/* MODAL */
/* Modal Overlay */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);  /* semi-transparent overlay */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    overflow-y: auto;               /* scroll if content is tall */
}

/* Modal Content */
.modal-content {
    background: var(--bg);          /* changes with theme */
    color: var(--text);             /* text changes with theme */
    border-radius: 12px;
    padding: 30px;
    width: 90%;
    max-width: 1200px;             /* increase width for desktop */
    max-height: 90vh;              /* keep modal height within viewport */
    overflow-y: auto;              /* scroll inside modal if content exceeds height */
    box-shadow: 0 10px 35px rgba(0,0,0,0.3);
    position: relative;
}

/* Scrollbar Styling */
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-content::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.05);
    border-radius: 4px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 4px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: darken(var(--accent), 10%);
}

/* MOBILE ADAPTATION */
@media screen and (max-width: 1024px) {
    .modal-content {
        width: 95%;            /* smaller width for tablets */
        padding: 25px;
        max-height: 90vh;
    }
}

@media screen and (max-width: 768px) {
    .modal-content {
        width: 95%;            /* full width on mobile */
        padding: 20px;
        max-height: 90vh;
    }
}

.close-btn {
    float: right;
    font-size: 28px;
    cursor: pointer;
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.experience-card {
    padding: 20px;
    border: 2px solid var(--accent);
    border-radius: 10px;
    transition: 0.3s ease;
}

.experience-card:hover {
    transform: translateY(-5px);
}

.cert-btn {
    margin-top: 15px;
    padding: 8px 15px;
    border: none;
    background: var(--accent);
    color: white;
    cursor: pointer;
    border-radius: 6px;
    transition: 0.3s ease;
}

.cert-btn:hover {
    opacity: 0.85;
}

.modal-buttons {
    margin: 20px 0;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.modal-btn {
    padding: 10px 18px;
    background: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    transition: 0.3s ease;
}

.modal-btn:hover {
    opacity: 0.85;
}

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



/* MOBILE HERO */
@media screen and (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .hero-text {
     max-width: 100%;
    }
    .hero-contact {
        font-size: 13px;
    }
}
.hero-highlights {
    margin-top: 15px;
    padding-left: 20px;
    font-size: 15px;
    line-height: 1.6;
}

.hero-highlights li {
    margin-bottom: 6px;
}

/* Bullet base animation state */
.hero-highlights li {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

/* When visible */
.hero-highlights li.show {
    opacity: 1;
    transform: translateY(0);
}

/* Base hidden state */
.reveal {
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}



/* Common Button Style */
.cert-btn,
.report-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    font-size: 14px;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: 0.3s ease;
    min-width: 140px;   /* makes both same width */
}

/* Certificate Button */
.cert-btn {
    background: var(--accent);
    color: white;
    border: none;
}

/* Report Button */
.report-btn {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
}

/* Hover Effects */
.cert-btn:hover {
    opacity: 0.85;
}

.report-btn:hover {
    background: var(--accent);
    color: white;
}

/* PROJECTS SECTION */
.projects {
    width: 100%;        /* full width */
    max-width: none;    /* remove restriction */
    margin: 0 auto;
    padding-top: 120px;
    padding-bottom: 100px;
}

.project-row {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-bottom: 60px;
}

/* Alternate layout */
.project-row.reverse {
  flex-direction: row-reverse;
}

.project-image img {
    width: 100%;
    max-width: 400px;   /* optional max size */
    height: auto;
}

.project-content {
  flex: 1;
}

.project-content h3 {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.project-content p {
  line-height: 1.6;
  margin-bottom: 15px;
}

/* Buttons */
.project-content button {
  padding: 10px 20px;
  border: none;
  background: #0077ff;
  color: white;
  border-radius: 6px;
  cursor: pointer;
}

.project-content button:hover {
  background: #005edb;
}

@media (max-width: 768px) {

    .nav-center {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        right: 20px;
        background: var(--bg);
        padding: 15px;
        border-radius: 10px;
        box-shadow: 0 5px 20px rgba(0,0,0,0.2);
    }

    nav {
        width: 90%;
        padding: 10px 15px;
    }

    .nav-center.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }
}

.close {
    position: absolute;
    right: 20px;
    top: 10px;
    font-size: 25px;
    cursor: pointer;
}

.video-container {
    margin-top: 20px;
    margin-bottom: 20px;
}

.video-container iframe {
    border-radius: 10px;
}

.video-container {
    margin-top: 20px;
}

video {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

/* SLIDER */
.slider {
    position: relative;
    max-width: 100%;
    margin: 20px 0;
    text-align: center;
}

.slider img {
    width: 100%;
    max-height: 350px;
    object-fit: cover;
    border-radius: 12px;
    transition: 0.3s ease;
}

/* Buttons */
.prev, .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    padding: 10px 14px;
    cursor: pointer;
    border-radius: 50%;
    font-size: 18px;
}

.prev { left: 10px; }
.next { right: 10px; }

.prev:hover, .next:hover {
    background: rgba(0,0,0,0.8);
}

/* SLIDER */
.slider {
    position: relative;
    width: 400px;
}

.slider img {
    width: 100%;
    border-radius: 15px;
}

/* Buttons */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    font-size: 22px;
    padding: 10px 14px;
    cursor: pointer;
    border-radius: 50%;
    z-index: 2;
}

.slider-btn:hover {
    background: rgba(0,0,0,0.8);
}

.prev {
    left: 10px;
}

.next {
    right: 10px;
}

.image-slider {
    position: relative;
    max-width: 700px; /* limits the width */
    margin: 20px auto; /* centers the slider */
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.image-slider img {
    width: 100%;  /* makes image fit container */
    height: auto; /* keeps aspect ratio */
    display: block;
}

.image-slider .prev,
.image-slider .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    padding: 10px;
    font-size: 18px;
    cursor: pointer;
    border-radius: 50%;
}

.image-slider .prev { left: 10px; }
.image-slider .next { right: 10px; }

.image-slider .prev:hover,
.image-slider .next:hover {
    background: rgba(0,0,0,0.7);
}

/* UNIFORM PROJECT IMAGE / SLIDER SIZE (fit images without cropping) */
.project-image,
.image-slider {
    width: 400px;       /* same width for all project images */
    height: 250px;      /* same height for all project images */
    overflow: hidden;
    border-radius: 12px;
    flex-shrink: 0;     /* prevents shrinking in flex layouts */
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    background: #ffffff; /* optional: placeholder background for empty space */
}

.project-image img,
.image-slider img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* compress image to fit inside container */
    display: block;
    margin: 0 auto;      /* center image if smaller than container */
}

#cvModal {
    display: none; /* Important: must be hidden by default */
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

#cvModal .modal-content {
    background: var(--bg);
    padding: 30px;
    max-width: 900px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    border-radius: 10px;
}