:root {
    --font-body: "Poppins", sans-serif;
    --section-alt-bg: #f5f5f5;
    --bg-color: #ffffff;
    --text-color: #333333;
    --accent-color: #0072b1;
    --header-bg: var(--accent-color);
    --header-text: #ffffff;
    --footer-bg: #f8f9fa;
    --card-bg: #ffffff;
}

body {
    font-family: var(--font-body);

    --bg-color: #ffffff;
    --text-color: #333333;
    --accent-color: #083d77; /* navy blue */
    --secondary-color: #006d77; /* teal */
    --highlight-color: #20c997; /* turquoise accent */
    --header-bg: var(--accent-color);
    --header-text: #fff;
    --footer-bg: #f8f9fa;
    --card-bg: #fff;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text-color);
    background: var(--bg-color);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

body.dark {
    --bg-color: #1a1a1a;
    --text-color: #eaeaea;
    --header-bg: #0d4f70;
    --footer-bg: #111111;

    --accent-color: #26547c;
    --header-bg: var(--accent-color);
    --footer-bg: #111;
    --card-bg: #242424;
}

header {
    background: var(--header-bg);
    color: var(--header-text);
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header h1 {
    margin: 0;
    font-size: 2em;
}

header nav {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

header nav button {
    background: transparent;
    border: none;
    color: inherit;
    font-size: 1.2em;
    cursor: pointer;
    margin-left: 10px;
}

header nav a {
    color: inherit;
    text-decoration: none;
    margin: 0 10px;
    padding: 10px 0;
}

header nav button {
    background: transparent;
    border: none;
    color: inherit;
    font-size: 1.1em;
    cursor: pointer;
    margin-left: 10px;
}

header nav a img {
    vertical-align: middle;
}

.container {
    width: min(90%, 1000px);
    margin: auto;
    overflow: hidden;
    padding: 20px;
}

.hero {
    background: linear-gradient(135deg, var(--accent-color), #0d4f70);
    color: #fff;
    text-align: center;
    padding: 60px 0;
}

.hero h2 {
    font-size: 2.5em;
    margin: 0 0 10px;
}

.hero p {
    font-size: 1.2em;
    margin: 0;
}

section {
    padding: 20px 0;
}
section:nth-of-type(even) {
    background: var(--section-alt-bg);
}

.hero {
    background: radial-gradient(circle at top left, var(--accent-color), #0d4f70);
    color: white;
    text-align: center;
    padding: 80px 0;
}

.hero h2 {
    font-size: 2.5em;
    margin: 0 0 10px;
}

.hero p {
    font-size: 1.2em;
    margin: 0;
}

section h2 {
    font-size: 1.5em;
    margin-bottom: 10px;
}

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--card-bg);

    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

table, th, td {
    border: 1px solid #ddd;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}


th, td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}

tbody tr:nth-child(odd) {
    background-color: rgba(0,0,0,0.03);
}



.tool-category {
    margin: 20px 0;
}

.tools-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.tool {
    background: var(--card-bg);
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 10px;
    text-align: center;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.tool:hover {
    transform: translateY(-4px);
}

.tool img {
    height: 40px;
    margin-bottom: 5px;
}

.tool span {
    display: block;
    font-size: 0.9em;

    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tools-container img {
    height: 40px;
    transition: transform 0.2s;
}

.tools-container img:hover {
    transform: scale(1.1);
}

.experience {
    background: var(--card-bg);
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: background 0.3s, border-color 0.3s;
}

body.dark .experience {
    border-color: #333;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.collapsed {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.toggle-resp {
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 8px 12px;
    margin-top: 10px;
    cursor: pointer;
}

#scroll-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.skill-bar {
    margin: 10px 0;
}

.skill-bar span {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.skill-level {
    background: #e5e5e5;
    border-radius: 4px;
    overflow: hidden;
}

.skill-level div {
    height: 10px;
    background: var(--highlight-color);
    width: 0;
    transition: width 1s ease-out;
}

.experience {
    background: var(--card-bg);
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: background 0.3s, border-color 0.3s;
}

body.dark .experience {
    border-color: #333;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

footer {
    background: var(--footer-bg);
    padding: 10px 0;
    text-align: center;
    margin-top: 20px;
}

@media (max-width: 768px) {
    header nav a {
        margin: 5px 0;
        padding: 5px 0;
    }
    .container {
        width: 95%;
    }
}