@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap");

/* CSS Variables for Theming */
:root {
    --bg-color: #f4f7f6;
    --text-color: #1a202c;
    --p-text-color: #4a5568;
    --primary-color: #4A90E2;
    --secondary-color: #50E3C2;
    --card-bg-color: #ffffff;
    --card-border-color: #e2e8f0;
    --btn-primary-bg-color: var(--primary-color);
    --btn-primary-text-color: #ffffff;
    --btn-primary-hover-bg-color: #357ABD;
    --btn-secondary-bg-color: transparent;
    --btn-secondary-text-color: var(--primary-color);
    --btn-secondary-border-color: var(--primary-color);
    --btn-secondary-hover-bg-color: rgba(74, 144, 226, 0.1);
    --icon-filter: none;
    --nav-link-opacity: 0.75;
    --title-opacity: 0.95;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.12);
    --highlight-color: #D9534F;
}

.dark-theme {
    --bg-color: #1A202C;
    --text-color: #E2E8F0;
    --p-text-color: #A0AEC0;
    --primary-color: #63B3ED;
    --secondary-color: #4FD1C5;
    --card-bg-color: #2D3748;
    --card-border-color: #4A5568;
    --btn-primary-bg-color: var(--primary-color);
    --btn-primary-text-color: #1A202C;
    --btn-primary-hover-bg-color: #4299E1;
    --btn-secondary-text-color: var(--primary-color);
    --btn-secondary-border-color: var(--primary-color);
    --btn-secondary-hover-bg-color: rgba(99, 179, 237, 0.15);
    --icon-filter: invert(90%) sepia(10%) saturate(150%) hue-rotate(180deg) brightness(100%) contrast(90%);
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    --box-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.35);
    --highlight-color: #F0AD4E;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "Poppins", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}
main { padding-top: 15vh; } /* Height of the sticky nav */
section { padding: 60px 5%; min-height: 60vh; }
section#profile { min-height: calc(85vh - 15vh); padding-top: 20px; }
section:last-of-type { min-height: auto; }
p { color: var(--p-text-color); }
.section__text__p1 { text-align: center; font-size: 1.1rem; color: var(--p-text-color); margin-bottom: 0.5rem; font-weight: 500; }
.title { font-size: 2.5rem; text-align: center; color: var(--text-color); opacity: var(--title-opacity); margin-bottom: 3rem; font-weight: 700; }
.main-title { font-size: 3rem; }

/* --- NAVIGATION --- */
#desktop-nav { display: flex; justify-content: space-around; align-items: center; height: 15vh; background-color: var(--bg-color); box-shadow: var(--box-shadow); position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 0 5%; transition: background-color 0.3s ease, box-shadow 0.3s ease; }
.logo-container { display: flex; align-items: center; gap: 0.5rem; }
.logo { font-size: 1.7rem; font-weight: 600; color: var(--text-color); }
#desktop-nav .nav-links { display: flex; gap: 2rem; list-style: none; align-items: center; }
#desktop-nav .nav-links a { color: var(--text-color); text-decoration: none; font-size: 1.1rem; font-weight: 500; opacity: var(--nav-link-opacity); transition: color 0.3s ease, opacity 0.3s ease; }
#desktop-nav .nav-links a:hover { color: var(--primary-color); opacity: 1; }

/* Theme Toggle Button - Desktop */
.theme-toggle-btn { background: none; border: none; cursor: pointer; padding: 0.5rem; display: flex; align-items: center; justify-content: center; }
.theme-icon { width: 22px; height: 22px; filter: var(--icon-filter); transition: filter 0.3s ease; }

/* --- HAMBURGER NAVIGATION --- */
#hamburger-nav { display: none; /* Shown in media queries */ justify-content: space-between; align-items: center; height: 15vh; background-color: var(--bg-color); box-shadow: var(--box-shadow); position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 0 5%; transition: background-color 0.3s ease, box-shadow 0.3s ease; }
.hamburger-menu {
    position: relative; /* CRITICAL for positioning child menu */
    display: flex;
    align-items: center;
}
.hamburger-icon { display: flex; flex-direction: column; justify-content: space-around; width: 30px; height: 22px; cursor: pointer; }
.hamburger-icon span { width: 100%; height: 3px; background-color: var(--text-color); border-radius: 2px; transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55); }
.hamburger-icon.open span:nth-child(1) { transform: translateY(9.5px) rotate(45deg); }
.hamburger-icon.open span:nth-child(2) { opacity: 0; transform: translateX(-20px); }
.hamburger-icon.open span:nth-child(3) { transform: translateY(-9.5px) rotate(-45deg); }

#hamburger-nav .mobile-menu-links {
    position: absolute;
    top: calc(100% + 10px); /* Position below the hamburger-menu div */
    right: 0; /* Aligns to the right edge of .hamburger-menu parent */
    width: 280px;
    max-width: 90vw; /* Max width relative to viewport */
    background: var(--card-bg-color);
    border-radius: 8px;
    box-shadow: var(--box-shadow-hover);
    max-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    opacity: 0;
    transform: translateY(-10px) scaleY(0.95);
    transform-origin: top right;
    transition: max-height 0.4s ease-out, opacity 0.3s ease-out, transform 0.3s ease-out;
    z-index: 999;
    border: 1px solid var(--card-border-color);
}
#hamburger-nav .mobile-menu-links.open { max-height: 500px; opacity: 1; transform: translateY(0) scaleY(1); }
#hamburger-nav .mobile-menu-links ul { list-style: none; padding: 0.5rem 0; }
#hamburger-nav .mobile-menu-links a, .theme-toggle-btn-mobile { display: block; padding: 12px 20px; font-size: 1.05rem; color: var(--text-color); text-decoration: none; transition: background-color 0.2s ease, color 0.2s ease; }
.theme-toggle-btn-mobile { width: 100%; background: none; border: none; cursor: pointer; text-align: left; display: flex; align-items: center; gap: 10px; }
.theme-toggle-btn-mobile .theme-icon { width: 20px; height: 20px; }
#hamburger-nav .mobile-menu-links a:hover, .theme-toggle-btn-mobile:hover { background-color: var(--bg-color); color: var(--primary-color); }

/* --- PROFILE SECTION --- */
#profile { display: flex; justify-content: center; align-items: center; gap: 4rem; text-align: center; }
#profile1 { width: 300px; height: 300px; border-radius: 50%; object-fit: cover; border: 6px solid var(--card-bg-color); box-shadow: 0 0 0 8px var(--card-border-color), var(--box-shadow-hover); }
.section__pic-container { flex-shrink: 0; }
.section__text { max-width: 600px; }
#socials-container { display: flex; justify-content: center; margin-top: 2rem; gap: 1.5rem; }
.icon { cursor: pointer; height: 1.8rem; width: 1.8rem; filter: var(--icon-filter); transition: transform 0.2s ease; }
.social-icon { height: 2.2rem; width: 2.2rem; }
.social-icon:hover { transform: translateY(-3px) scale(1.1); }

/* --- BUTTONS --- */
.btn-container { display: flex; justify-content: center; gap: 1rem; margin-top: 1.5rem; }
.btn { font-weight: 600; padding: 0.8rem 2rem; border-radius: 50px; cursor: pointer; font-size: 0.95rem; transition: all 0.3s ease; border: 2px solid transparent; }
.btn-color-1 { background-color: var(--btn-primary-bg-color); color: var(--btn-primary-text-color); border-color: var(--btn-primary-bg-color); }
.btn-color-1:hover { background-color: var(--btn-primary-hover-bg-color); border-color: var(--btn-primary-hover-bg-color); transform: translateY(-2px); box-shadow: 0 4px 8px rgba(0,0,0,0.1); }
.dark-theme .btn-color-1:hover { box-shadow: 0 4px 8px rgba(0,0,0,0.2); }
.btn-color-2 { background-color: var(--btn-secondary-bg-color); color: var(--btn-secondary-text-color); border-color: var(--btn-secondary-border-color); }
.btn-color-2:hover { background-color: var(--btn-secondary-hover-bg-color); transform: translateY(-2px); box-shadow: 0 4px 8px rgba(0,0,0,0.05); }
.dark-theme .btn-color-2:hover { box-shadow: 0 4px 8px rgba(0,0,0,0.1); }

/* --- ABOUT SECTION --- */
.section-container-about { max-width: 1000px; margin: 0 auto; }
.about-details-container { display: flex; flex-direction: column; gap: 2.5rem; }
.about-cards-container { display: flex; gap: 2rem; justify-content: center; }
.details-container.about-card { padding: 1.5rem; flex: 1; background: var(--card-bg-color); border-radius: 12px; border: 1px solid var(--card-border-color); text-align: center; box-shadow: var(--box-shadow); min-width: 280px; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.details-container.about-card:hover { transform: translateY(-5px); box-shadow: var(--box-shadow-hover); }
.about-icon { height: 40px; width: 40px; margin-bottom: 1rem; filter: var(--icon-filter); }
.details-container.about-card h3 { margin-bottom: 0.5rem; font-size: 1.25rem; color: var(--text-color); font-weight: 600; }
.details-container.about-card p { font-size: 0.95rem; }
.text-container { text-align: left; line-height: 1.7; max-width: 900px; margin: 0 auto; }
.text-container ul { list-style-type: disc; margin-top: 0.5rem; padding-left: 25px; }
.text-container ul li { margin-bottom: 0.4rem; font-size: 0.95rem; }
.achievements-languages { display: flex; gap: 3rem; margin-top: 1.5rem; }
.achievements-languages > div { flex: 1; }

/* --- SKILLS SECTION --- */
.skills-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; max-width: 1200px; margin: 0 auto; }
.details-container.skills-card { padding: 1.5rem 2rem; background: var(--card-bg-color); border-radius: 12px; border: 1px solid var(--card-border-color); box-shadow: var(--box-shadow); }
.experience-sub-title { color: var(--text-color); font-weight: 600; font-size: 1.3rem; margin-bottom: 1.5rem; text-align: left; }
.skills-card .article-container { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: flex-start; }
.skills-card article { display: flex; align-items: center; gap: 0.8rem; background-color: var(--bg-color); padding: 0.5rem 1rem; border-radius: 20px; border: 1px solid var(--card-border-color); transition: background-color 0.3s ease, border-color 0.3s ease; }
.skills-card article:hover { background-color: var(--card-bg-color); border-color: var(--primary-color); }
.skill-icon { height: 1.1rem; width: 1.1rem; filter: var(--icon-filter); }
.skills-card article h3 { font-size: 0.95rem; font-weight: 500; margin: 0; color: var(--text-color); }
.skills-card article p { font-size: 0.8rem; color: var(--p-text-color); margin: 0; opacity: 0.8; }

/* --- WORK EXPERIENCE SECTION --- */
.experience-container { max-width: 900px; margin: 0 auto; display: flex; flex-direction: column; gap: 2rem; }
.experience-card { background: var(--card-bg-color); border-radius: 12px; padding: 1.5rem 2rem; box-shadow: var(--box-shadow); text-align: left; border: 1px solid var(--card-border-color); }
.experience-card h3 { font-size: 1.25rem; margin-bottom: 0.3rem; color: var(--text-color); font-weight: 600; }
.experience-card .date { font-size: 0.9rem; color: var(--secondary-color); margin-bottom: 1rem; font-weight: 500; }
.experience-card ul { list-style: none; padding-left: 5px; }
.experience-card ul li { font-size: 0.95rem; margin-bottom: 0.6rem; padding-left: 25px; position: relative; color: var(--p-text-color); }
.experience-card ul li::before { content: "▹"; position: absolute; left: 0; color: var(--primary-color); font-weight: bold; font-size: 1.2rem; line-height: 1; }

/* --- PROJECTS SECTION --- */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2.5rem; max-width: 1300px; margin: 0 auto; }
.project-card { background: var(--card-bg-color); border: 1px solid var(--card-border-color); border-radius: 12px; padding: 1.5rem; display: flex; flex-direction: column; text-align: left; box-shadow: var(--box-shadow); transition: transform 0.3s ease, box-shadow 0.3s ease; }
.project-card:hover { transform: translateY(-8px); box-shadow: var(--box-shadow-hover); }
.project-img-container { width: 100%; height: 220px; margin-bottom: 1.2rem; border-radius: 8px; overflow: hidden; }
.project-img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.project-card:hover .project-img { transform: scale(1.05); }
.project-title-card { margin: 0 0 0.5rem; color: var(--text-color); font-size: 1.35rem; font-weight: 600; text-align: left; }
.project-tech { font-size: 0.85rem; color: var(--secondary-color); margin-bottom: 0.8rem; font-weight: 500; }
.project-description { font-size: 0.9rem; color: var(--p-text-color); flex-grow: 1; margin-bottom: 1.5rem; }
.project-card .btn-container { margin-top: auto; justify-content: flex-start; }
.project-btn { padding: 0.7rem 1.5rem; font-size: 0.9rem; }

/* --- CONTACT SECTION --- */
#contact { min-height: auto; padding-bottom: 4rem; }
.contact-info-upper-container { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 2rem; border-radius: 12px; border: 1px solid var(--card-border-color); background: var(--card-bg-color); margin: 2rem auto; padding: 2rem 2.5rem; box-shadow: var(--box-shadow); max-width: 800px; }
.contact-info-container { display: flex; align-items: center; gap: 1rem; }
.contact-info-container p { font-size: 1.05rem; font-weight: 500; }
.contact-info-container a { color: var(--text-color); text-decoration: none; transition: color 0.3s ease; }
.contact-info-container a:hover { color: var(--primary-color); }
.contact-icon { height: 1.6rem; filter: var(--icon-filter); }
.email-icon { height: 2.2rem; }

/* --- FOOTER SECTION --- */
footer { padding: 2.5rem 5%; background-color: var(--card-bg-color); border-top: 1px solid var(--card-border-color); text-align: center; }
footer .nav-links-container { margin-bottom: 1.5rem; }
footer .nav-links { justify-content: center; gap: 1.8rem; list-style: none; display: flex; align-items: center; }
footer .nav-links a { color: var(--text-color); text-decoration: none; font-size: 1rem; opacity: 0.7; font-weight: 500; }
footer .nav-links a:hover { opacity: 1; color: var(--primary-color); }
footer p { color: var(--p-text-color); font-size: 0.9rem; margin-bottom: 0.3rem; }
.portfolio-link { font-size: 0.85rem; opacity: 0.7; color: var(--secondary-color); text-decoration: none; }
.portfolio-link:hover { text-decoration: underline; opacity: 1; }

/* --- Highlight class --- */
.highlight { font-weight: 600; color: var(--highlight-color); }