/* Color palette */
:root {
    /* Default stone theme */
    --bg-main: #0a0e14;
    --text-main: #e6e6e6;
    --text-muted: #bfc5d0;
    --accent: #bdb9a5; 
    --accent-color: #9a9683;
    --border-radius: 8px;
    --link-hover: #79c0ff;
    --surface-color: #161b22;
}

.theme-stone {
    --bg-main: #0a0e14;
    --text-main: #e6e6e6;
    --text-muted: #bfc5d0;
    --accent: #bdb9a5;
    --accent-color: #9a9683;
}

.theme-red {
    --bg-main: #1f1a1a;
    --text-main: #f5f5f5;
    --text-muted: #c9a1a1;
    --accent: #b5383f;
    --accent-color: #8c2b33;
}

.theme-blue {
    --bg-main: #121a24;
    --text-main: #e6f0fa;
    --text-muted: #a7b6c7;
    --accent: #3f6db5;
    --accent-color: #2c4e85;
}

.theme-green {
    --bg-main: #0d1f18;
    --text-main: #e0f2e6;
    --text-muted: #a7c9b8;
    --accent: #3f8f6d;
    --accent-color: #2c5e4b;
}

/* Default styles */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    scroll-behavior: smooth;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: 90%;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */

/* #header-matrix {
position: absolute;
inset: 0;
width: 100%;
height: 100%;       
display: block;
z-index: -1;
pointer-events: none;  
} */
/* #header-matrix {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
opacity: 0;
transition: opacity 0.4s ease;
pointer-events: none;
z-index: -1;  
} */

.navbar {
    width: 100%;
    background-color: var(--surface-color);
    padding: 0.75rem 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    position: sticky;
    top: 0;
    z-index: 999;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1.25rem;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--link-hover);
}

.nav-links > li.has-submenu {
  position: relative; 
}

.has-submenu > .submenu-toggle {
    background: transparent;
    border: none;
    color: var(--text-main);
    font: inherit;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0;
}

.has-submenu .caret {
    transition: transform 0.2s ease;
}

.has-submenu.open > .submenu { display: block; }
.has-submenu > .submenu-toggle .caret { transition: transform 0.2s ease; }
.submenu-toggle[aria-expanded="true"] .caret { transform: rotate(180deg); }

.submenu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right:auto;
    min-width: 220px;
    background: var(--surface-color);
    /* border: 1px solid #30363d;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3); */
    padding: 0.5rem 0;
    display: none;
    z-index: 1000;
}

.submenu li { list-style: none; }

.submenu a {
    display: block;
    padding: 0.5rem 0.9rem;
    color: var(--text-main);
    text-decoration: none;
    white-space: nowrap;
}

.submenu a:hover { background: rgba(255,255,255,0.06); }

/* Hero Section */
/* .hero-section {
padding: 5rem 0 3rem;
text-align: center;
background-color: var(--bg-main);
} */
.hero-section {
    position: relative;
    overflow: hidden; 
    text-align: center;
    padding: 5rem 0 3rem;
    background-color: var(--bg-main);
}

.hero-matrix-canvas {
    position: absolute;
    inset: 0;
    display: block;
    z-index: 0;         
    pointer-events: none;
    background-color: var(--bg-main);
}

.hero-section > .container,
.hero-section .btn-resume {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    font-weight: 800;
    color: var(--accent-color);
}

.hero-subtitle {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--text-main);
}

.hero-description {
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-muted);
}

.btn-resume {
    display: inline-block;
    padding: 8px;
    margin-top: 12px;
    color: var(--text-main);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.svg-resume
{
    vertical-align: middle; 
    margin-bottom: 4px;
    margin-right: 6px; 
    color:gray
}

/* Section headings */
section h2 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
    position: relative;
}

/* About Section */
.about-section {
    padding: 3rem 0;
    background-color: var(--surface-color);
    border-top: 1px solid #30363d;
    border-bottom: 1px solid #30363d;
}

.about-section p {
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-muted);
}

/* Experience Section */
.experience-section {
    padding: 3rem 0;
}

.experience-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.experience-item {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.experience-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.75rem;
}

.experience-header h3 {
    margin: 0;
    font-size: 1.3rem;
    color: var(--accent-color);
}

.company {
    font-weight: 500;
    color: var(--text-main);
    margin-right: 1rem;
}

.dates {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.experience-item ul {
    padding-left: 1.5rem;
    margin: 0;
}

.experience-item li {
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

/* Skills Section */
.skills-section {
    padding: 3rem 0;
    background-color: var(--surface-color);
    border-top: 1px solid #30363d;
    border-bottom: 1px solid #30363d;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}
.skills-grid ul {
    list-style: none;
    padding-left: 1rem;
}

.skills-grid li::before {
    content: '▪';
    color: var(--accent-color);
    margin-right: 0.4rem;
}

.skills-grid li {
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

/* Education Section */
.education-section {
    padding: 3rem 0;
}

.education-item {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.education-item h3 {
    margin-top: 0;
    font-size: 1.3rem;
    color: var(--accent-color);
}

.school {
    color: var(--text-main);
}

/* Contact Section */
.contact-section {
    padding: 3rem 0;
    background-color: var(--surface-color);
    border-top: 1px solid #30363d;
    border-bottom: 1px solid #30363d;
}

.contact-list {
    list-style: none;
    padding: 0;
    max-width: 600px;
    margin: 1rem auto 0;
}

.contact-list li {
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--text-main);
}

.contact-list a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.contact-list a:hover {
    color: var(--link-hover);
}

/* Theme Section  */
.theme-section {
    padding: 3rem 0;
}

.theme-container {
    display: flex;
    justify-content: center;
}

.theme-label {
    margin-right: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.theme-switcher {
    margin-left: 10px;
    padding: 4px 8px;
    background-color: var(--bg-main);
    color: var(--text-main);
    border: 1px solid var(--accent-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

/* Footer */
footer {
    background-color: var(--surface-color);
    padding: 1rem 0;
    text-align: center;
}

footer p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}


/* Responsive adjustments */
/* @media (max-width: 600px) {
.nav-links {
gap: 0.75rem;
}
.hero-title {
font-size: 2.2rem;
}
.hero-subtitle {
font-size: 1.2rem;
}
.experience-header {
flex-direction: column;
align-items: flex-start;
gap: 0.25rem;
}
} */

/* --- Mobile nav toggle --- */
.nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--text-main);
    color: var(--text-main);
    padding: 0.35rem 0.5rem;
    border-radius: 6px;
    cursor: pointer;
}
.nav-toggle .icon-close { display: none; }


.nav-links { display: flex; gap: 1.25rem; }


@media (max-width: 768px) {
    .nav-toggle { display: inline-flex; }

    .nav-container { position: relative; }

    .nav-links {
        display: none;               
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        background: var(--surface-color);
        border-bottom: 1px solid #30363d;
        padding: 0.5rem 1rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    .nav-links.open { display: flex; }

    .nav-links a { padding: 0.5rem 0.25rem; display: block; }

    .nav-toggle[aria-expanded="true"] .icon-hamburger { display: none; }
    .nav-toggle[aria-expanded="true"] .icon-close { display: inline; }

    .has-submenu { position: static; }

    .submenu {
        position: static;
        border: 0;
        box-shadow: none;
        border-left: 2px solid #30363d;
        margin-left: 0.5rem;
        padding-left: 0.25rem;
    }

    /* start hidden until toggled open by JS */
    .submenu { display: none; }
    .has-submenu.open > .submenu { display: block; }

    .has-submenu > .submenu-toggle {
        width: 100%;
        text-align: left;
        padding: 0.5rem 0.25rem;
    }  
}