@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,300;0,400;0,700;1,300&display=swap');

* {
	margin: 0;
	padding: 0;
	font-family: 'Poppins', sans-serif;
	box-sizing: border-box;
}

:root {
	/* Dark Theme Colors */
	--bg-primary: #1e1e1e;
	--bg-secondary: #252525;
	--bg-tertiary: #2d2d2d;
	--bg-nav: rgba(31, 31, 31, 0.85);
	--bg-form-input: #333;
	--bg-card: #2d2d2d;

	--text-primary: #e5e5e5;
	--text-secondary: #ababab;
	--text-tertiary: #9ca3af;
	--text-headings: #ffffff;
	--text-contrast: #111827;

	--border-primary: #444;
	--border-secondary: #4b5563;
	
	--accent-primary: #facc15;
	--accent-primary-dark: #eab308;
	--accent-secondary: #ff004f;
	--accent-shadow: rgba(250, 204, 21, 0.15);
	--card-shadow: rgba(0, 0, 0, 0.2);

	--transition-base: all 0.3s ease;
}

body.light-mode {
	/* Light Theme Colors */
	--bg-primary: #ffffff;
	--bg-secondary: #f8f9fa;
	--bg-tertiary: #f1f3f5;
	--bg-nav: rgba(255, 255, 255, 0.85);
	--bg-form-input: #ffffff;
	--bg-card: #ffffff;

	--text-primary: #212529;
	--text-secondary: #495057;
	--text-tertiary: #6c757d;
	--text-headings: #000000;
	--text-contrast: #ffffff;

	--border-primary: #dee2e6;
	--border-secondary: #ced4da;

	--accent-primary: #f59e0b;
	--accent-primary-dark: #d97706;
	--accent-secondary: #d946ef;
	--accent-shadow: rgba(245, 158, 11, 0.2);
	--card-shadow: rgba(0, 0, 0, 0.1);
}

html {
	scroll-behavior: smooth;
}

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

/* General Transition for all elements that might change color */
nav, section, div, a, p, h1, h2, h3, h4, h5, h6, span, i, button, input, textarea {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible {
	outline: 2px solid var(--accent-primary);
	outline-offset: 3px;
}

.serif-font { font-family: 'Merriweather', serif; }
.text-gradient {
	background: linear-gradient(to right, var(--accent-primary), var(--accent-primary-dark));
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-secondary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-primary); }


/* ========== NAVIGATION ========== */
nav {
	background-color: var(--bg-nav);
	border-bottom: 1px solid var(--border-primary);
    backdrop-filter: blur(10px);
}
nav a, #theme-toggle-desktop, #theme-toggle-mobile {
	color: var(--text-secondary);
}
nav a:hover, #theme-toggle-desktop:hover, #theme-toggle-mobile:hover {
	color: var(--accent-primary);
}
nav .text-white { color: var(--text-headings); }
nav .text-yellow-400 { color: var(--accent-primary); }

#mobile-menu {
	background-color: var(--bg-tertiary);
	border-top-color: var(--border-primary);
}
#mobile-menu a { color: var(--text-secondary); }
#mobile-menu a:hover { background-color: var(--bg-primary); color: var(--text-primary); }

#theme-toggle-desktop i, #theme-toggle-mobile i {
    transition: transform 0.3s ease;
}
body.light-mode #theme-toggle-desktop i, body.light-mode #theme-toggle-mobile i {
    transform: rotate(180deg);
}


/* ========== HEADER ========== */
#header { background-color: var(--bg-secondary); }
#header h1, #header .text-gradient { color: var(--text-headings); }
#header .text-gray-300, #header .text-gray-400 { color: var(--text-secondary); }
#header .text-yellow-400 { color: var(--accent-primary); }
#header .text-white { color: var(--text-headings); }
#header .bg-\[\#333\] { background-color: var(--bg-tertiary); }
#header .border-gray-600 { border-color: var(--border-secondary); }
#header .bg-yellow-500 { background-color: var(--accent-primary); color: var(--text-contrast); }
#header .bg-yellow-500:hover { background-color: var(--accent-primary-dark); }
#header .social-icons a { color: var(--text-secondary); }
#header .social-icons a:hover { color: var(--accent-primary); }


/* ========== UNIVERSAL SECTION STYLES ========== */
#about, #courses, #portfolio, #contact {
	background-color: var(--bg-secondary);
}
#skills > div, #experience, #additional, #education {
	background-color: var(--bg-primary);
}
#about h2, #skills h1, #education h1, #courses h2, #experience h1, #portfolio h1, #contact h1 {
	color: var(--text-headings);
}
#about .text-gray-300, #skills p, #education p, #experience p, #additional span, #additional .text-gray-300 {
	color: var(--text-secondary);
}


/* ========== SKILLS & HIGHLIGHTED ========== */
#highlighted {
	background-color: var(--bg-secondary);
	border: 1px solid var(--border-primary);
}
#highlighted-icon { background-color: var(--bg-tertiary); }
#highlighted-icon i { color: var(--accent-primary); }
#highlighted-title { color: var(--text-primary); }

.tab-btn, #skill-tabs button {
	background-color: var(--bg-tertiary);
	color: var(--text-secondary);
	border: 1px solid var(--border-secondary);
}
.tab-btn:hover, #skill-tabs button:hover {
	border-color: var(--accent-primary);
	color: var(--text-primary);
}
.tab-btn.active, #skill-tabs .active {
	background: var(--accent-primary) !important;
	color: var(--text-contrast) !important;
	border-color: var(--accent-primary) !important;
	box-shadow: 0 0 15px var(--accent-shadow);
}
.skill-card {
	background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary) !important;
}
.skill-card .text-gray-400 { color: var(--text-tertiary); }
.skill-card .bg-\[\#ffffff\]\/5 { background-color: rgba(125, 125, 125, 0.05); }


/* ========== EDUCATION & EXPERIENCE TIMELINE ========== */
#education h1, #experience h1 { border-bottom-color: var(--border-primary); }
.timeline-dot { background-color: var(--border-secondary); }
.timeline-item.active .timeline-dot {
	background-color: var(--accent-primary);
	box-shadow: 0 0 20px 4px var(--accent-shadow);
	border-color: var(--bg-primary);
}
.date-tag { background-color: var(--bg-tertiary); color: var(--text-primary); }
.date-tag::after { border-right-color: var(--bg-tertiary); }
.timeline-item.active .date-tag { background-color: var(--accent-primary); color: var(--text-contrast); }
.timeline-item.active .date-tag::after { border-right-color: var(--accent-primary); }
.duration-badge {
	background-color: var(--bg-tertiary);
	border-color: var(--border-primary);
	color: var(--accent-primary);
}
body.light-mode .wavy-line { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 6 20'%3E%3Cpath d='M3 0 Q 6 5 3 10 Q 0 15 3 20' fill='none' stroke='%23ced4da' stroke-width='1.5'/%3E%3C/svg%3E"); }


/* ========== COURSES & ADDITIONAL ========== */
.course-card {
	background: var(--bg-tertiary);
	border: 1px solid var(--border-primary);
}
.course-card:hover {
	transform: translateY(-5px);
	border-color: var(--accent-primary);
	box-shadow: 0 10px 20px var(--card-shadow);
}
.course-icon-box { background: var(--bg-primary); }
.course-card:hover .course-icon-box { background: var(--accent-primary); color: var(--text-contrast); }

#additional .border-t { border-top-color: var(--border-primary); }
#additional .bg-gray-700 { background-color: var(--bg-tertiary); border-color: var(--border-primary); color: var(--text-secondary); }
#additional .bg-gray-700:hover { background-color: var(--accent-primary); color: var(--text-contrast); }


/* ========== NEW PORTFOLIO CARD DESIGN ========== */
.portfolio-tab-btn {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-secondary);
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.portfolio-tab-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-shadow);
}
.portfolio-tab-btn.active {
    background-color: var(--accent-primary);
    color: var(--text-contrast);
    box-shadow: 0 0 15px var(--accent-shadow);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.work-card {
    background-color: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    display: block;
    border: 1px solid var(--border-primary);
    box-shadow: 0 4px 15px var(--card-shadow);
    transition: var(--transition-base);
}
.work-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px var(--accent-shadow);
    border-color: var(--accent-primary);
}
.work-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-primary);
}
.work-card .work-link {
    padding: 1.25rem;
}
.work-card .work-link h3 {
    color: var(--text-headings);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    transition: color 0.3s ease;
}
.work-card:hover .work-link h3 {
    color: var(--accent-primary);
}
.work-card .work-link p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    min-height: 42px;
    line-height: 1.5;
}

.portfolio-link-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    gap: 8px;
    padding: 10px;
    border-radius: 8px;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 500;
    border: 1px solid var(--border-primary);
    text-align: center;
    text-decoration: none;
}
.portfolio-link-btn:hover {
    background-color: var(--accent-primary);
    color: var(--text-contrast);
    border-color: var(--accent-primary);
}
.portfolio-link-btn.github:hover {
    background-color: #333;
    color: white;
    border-color: #333;
}
.portfolio-link-btn.disabled {
    background-color: var(--bg-tertiary);
    color: var(--text-tertiary);
    cursor: not-allowed;
    opacity: 0.6;
}
.portfolio-link-btn.disabled:hover {
	background-color: var(--bg-tertiary);
	color: var(--text-tertiary);
	border-color: var(--border-primary);
}

/* ========== CONTACT FORM ========== */
#contact .flex {
    gap: 3rem;
}
.sub-title {
    color: var(--text-headings);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
}
.sub-title span { color: var(--accent-primary); }
.sub-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 2px;
}
.contact-left p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1rem;
    margin-top: 2rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.contact-left p i {
    color: var(--accent-primary);
    width: 20px;
}
.social-icons {
    margin-top: 2rem;
    display: flex;
    gap: 15px;
}
.social-icons a {
    color: var(--text-secondary);
    font-size: 1.5rem;
    transition: all 0.3s ease;
    padding: 10px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.social-icons a:hover {
    color: var(--accent-primary);
    transform: scale(1.1);
    box-shadow: 0 4px 12px var(--accent-shadow);
}

form input, form textarea {
    background: var(--bg-form-input);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    padding: 15px 20px;
    margin: 10px 0;
    width: 100%;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}
form input:focus, form textarea:focus {
    border-color: var(--accent-primary);
    outline: none;
    box-shadow: 0 0 0 3px var(--accent-shadow);
}
form textarea {
    resize: vertical;
    min-height: 120px;
}
.btn-2 {
    background: var(--accent-primary);
    color: var(--text-contrast);
    border: 1px solid var(--accent-primary);
    transition: all 0.3s ease;
    cursor: pointer;
    font-weight: 600;
}
.btn-2:hover {
    background: var(--accent-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-shadow);
}


/* ========== BUTTONS & FOOTER ========== */
.btn-2, .h-btn {
	display: inline-block;
	padding: 12px 32px;
	border-radius: 8px;
	font-size: 1rem;
	font-weight: 600;
	text-decoration: none;
	cursor: pointer;
	transition: all 0.3s ease;
}
.btn-2 {
	background: var(--accent-primary);
	color: var(--text-contrast);
	border: 1px solid var(--accent-primary);
}
.btn-2:hover {
	background: var(--accent-primary-dark);
	transform: translateY(-2px);
	box-shadow: 0 6px 20px var(--accent-shadow);
}
.h-btn {
	background: transparent;
	color: var(--accent-primary);
	border: 2px solid var(--accent-primary);
}
.h-btn:hover {
	background: var(--accent-primary);
	color: var(--text-contrast);
	transform: translateY(-2px);
	box-shadow: 0 6px 20px var(--accent-shadow);
}
.h-btn {
	background: transparent;
	color: var(--accent-primary);
	border: 2px solid var(--accent-primary);
}
.h-btn:hover {
	background: var(--accent-primary);
	color: var(--text-contrast);
	box-shadow: 0 0 20px var(--accent-shadow);
	transform: translateY(-2px);
}
.btn-2 {
    margin-top: 30px;
    background: var(--accent-primary);
    color: var(--text-contrast);
    border: 2px solid var(--accent-primary);
}
.btn-2:hover {
	background: var(--accent-primary-dark);
    border-color: var(--accent-primary-dark);
	box-shadow: 0 0 20px var(--accent-shadow);
	transform: translateY(-2px);
}

.copyright {
	background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
	color: var(--text-tertiary);
	padding: 25px 0;
	margin-top: 20px;
    text-align: center;
    font-weight: 300;
}
.copyright i { color: var(--accent-secondary); }