@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@100;300;400;500;700&display=swap');

:root {
    /* Light Theme */
    --bg-light: #E0E0DB;
    --text-light: #3C3540;
    --card-bg-light: #F5F4F1;
    --hover-light: #D6D1CC;

    /* Dark Theme */
    --bg-dark: #1F1C22;
    --text-dark: #F5F4F1;
    --card-bg-dark: #2A252D;
    --hover-dark: #3C3540;

    /* Brand Colors */
    --primary: #337C61;
    --accent: #48BFB8;
    --highlight: #BBD976;
    --secondary: #704F9F;
    --accent-text-dark: #48BFB8;
    --accent-text-light: #1F5F58;
    --link-hover-dark: #BBD976;
    --link-hover-light: #244F3D;

    /* Shared */
    --radius: 18px;
    --transition: all 0.25s ease;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.12);

    --container-width: 1100px;
}

/* =========================================
   Theme Mapping
========================================= */

[data-theme="dark"] {
    --bg: var(--bg-dark);
    --text: var(--text-dark);
    --card-bg: var(--card-bg-dark);
    --hover: var(--hover-dark);
    --accent-text: var(--accent-text-dark);
    --link-hover: var(--link-hover-dark);

    color-scheme: dark;
}

[data-theme="light"] {
    --bg: var(--bg-light);
    --text: var(--text-light);
    --card-bg: var(--card-bg-light);
    --hover: var(--hover-light);
    --accent-text: var(--accent-text-light);
    --link-hover: var(--link-hover-light);

    color-scheme: light;
}

/* =========================================
   Reset
========================================= */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* =========================================
   Base
========================================= */

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    font-weight: 300;

    background-color: var(--bg);
    color: var(--text);

    min-height: 100vh;

    transition: var(--transition);

    line-height: 1.7;
}

/* =========================================
   Layout
========================================= */

.container {
    width: auto;
    max-width: var(--container-width);

    margin: 0 auto;

    padding: 2rem;
}

main {
    padding: 2rem 0;
}

section {
    margin-bottom: 4rem;
}

/* =========================================
   Typography
========================================= */

h1 {
    font-size: 2.8rem;
    font-weight: 500;

    letter-spacing: 0;

    margin-bottom: 1rem;
}

h2 {
    font-size: 1.2rem;
    font-weight: 500;

    margin-bottom: 1rem;

    text-transform: uppercase;

    letter-spacing: 0;

    color: var(--accent-text);
}

h3 {
    font-size: 1.1rem;
    font-weight: 500;

    margin-bottom: 0.75rem;
}

p {
    opacity: 0.85;
}

.visually-hidden {
    position: absolute;

    width: 1px;
    height: 1px;

    padding: 0;
    margin: -1px;

    overflow: hidden;

    clip: rect(0, 0, 0, 0);
    white-space: nowrap;

    border: 0;
}

a {
    color: var(--accent-text);

    text-decoration: none;

    transition: var(--transition);
}

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

/* =========================================
   Header / Navigation
========================================= */

header {
    margin-bottom: 3rem;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;

    gap: 1rem;

    margin-top: 1rem;
}

.main-nav a {
    font-weight: 400;
}

/* =========================================
   Hero / Bio
========================================= */

.avatar {
    width: 120px;
    height: 120px;

    border-radius: 50%;

    object-fit: cover;

    margin-bottom: 1.5rem;

    border: 3px solid var(--highlight);

    transition: var(--transition);
}

.avatar:hover {
    transform: scale(1.03);
}

.bio {
    font-size: 1rem;

    opacity: 0.7;

    margin-bottom: 2rem;
}

/* =========================================
   Generic Cards
========================================= */

.card {
    background: var(--card-bg);

    border-radius: var(--radius);

    border: 1px solid rgba(72, 191, 184, 0.08);

    box-shadow: var(--shadow);

    transition: var(--transition);
}

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

    box-shadow: 0 16px 32px rgba(0,0,0,0.12);
}

/* =========================================
   Links / Buttons
========================================= */

.links {
    display: flex;
    flex-direction: column;

    gap: 0.85rem;

    margin-bottom: 2rem;
}

.link {
    background: var(--hover);

    border-radius: var(--radius);

    padding: 1rem 1.2rem;

    color: var(--text);

    font-weight: 400;

    border: 1px solid rgba(72, 191, 184, 0.08);

    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);

    transition: var(--transition);
}

.link:hover {
    background: var(--primary);

    color: white;

    transform: translateY(-2px);

    box-shadow: 0 10px 24px rgba(51, 124, 97, 0.25);
}

/* =========================================
   Social Icons
========================================= */

.social-icons {
    display: flex;

    justify-content: center;

    gap: 1rem;

    margin-top: 1rem;
}

.social-icons a {
    width: 42px;
    height: 42px;

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

    border-radius: 50%;

    background: var(--hover);

    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--primary);

    transform: translateY(-2px);
}

.social-icons svg {
    width: 20px;
    height: 20px;

    fill: var(--text);

    transition: var(--transition);
}

.social-icons a:hover svg {
    fill: white;
}

/* =========================================
   Theme Toggle
========================================= */

.theme-toggle {
    position: fixed;

    top: 1.25rem;
    right: 1.25rem;

    width: 48px;
    height: 48px;

    border-radius: 50%;

    border: 1px solid rgba(72, 191, 184, 0.12);

    background: var(--card-bg);

    color: var(--text);

    cursor: pointer;

    font-size: 1rem;

    box-shadow: var(--shadow);

    transition: var(--transition);

    z-index: 1000;
}

.theme-toggle:hover {
    transform: scale(1.05);

    background: var(--primary);

    color: white;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 3px solid var(--accent-text);

    outline-offset: 4px;
}

/* =========================================
   Footer
========================================= */

.footer {
    margin-top: 4rem;

    text-align: center;

    font-size: 0.85rem;

    opacity: 0.65;
}

.credit {
    margin-top: 0.7rem;

    font-size: 0.75rem;

    opacity: 0.5;
}

/* =========================================
   Back Link
========================================= */

.back-link {
    display: inline-block;

    margin-bottom: 2rem;

    color: var(--accent-text);

    font-weight: 400;
}

/* =========================================
   Section Heading
========================================= */

.section-heading {
    text-align: center;

    margin-bottom: 3rem;
}

/* =========================================
   Search Bar
========================================= */

.search-bar {
    margin-bottom: 2rem;
}

.search-bar input {
    width: 100%;

    padding: 1rem;

    border-radius: var(--radius);

    border: 1px solid rgba(72, 191, 184, 0.15);

    background: var(--card-bg);

    color: var(--text);

    font-family: 'Roboto', sans-serif;

    transition: var(--transition);
}

.search-bar input:focus {
    outline: none;

    border-color: var(--accent);

    box-shadow: 0 0 0 3px rgba(72, 191, 184, 0.15);
}

.search-bar input:focus-visible {
    outline: 3px solid var(--accent-text);

    outline-offset: 4px;
}

/* =========================================
   Tool Grid
========================================= */

.tools-grid {
    display: grid;

    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));

    gap: 1.5rem;
}

/* =========================================
   Tool Cards
========================================= */

.tool-card {
    background: var(--card-bg);

    border-radius: var(--radius);

    overflow: hidden;

    border: 1px solid rgba(72, 191, 184, 0.08);

    box-shadow: var(--shadow);

    transition: var(--transition);
}

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

    box-shadow: 0 16px 32px rgba(0,0,0,0.12);
}

.tool-card-preview {
    height: 180px;

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

    font-size: 3rem;

    background: linear-gradient(
        135deg,
        var(--primary),
        var(--accent)
    );

    color: white;
}

.tool-card-preview img {
    width: 100%;
    height: 100%;

    object-fit: cover;
}

.tool-card-body {
    padding: 1.5rem;
}

.tool-card-body h3 {
    margin-bottom: 0.75rem;

    color: var(--text);
}

.tool-card-body p {
    opacity: 0.75;
}

.tool-card-footer {
    padding: 0 1.5rem 1.5rem;
}

.tool-card-footer a {
    font-weight: 500;
}

/* =========================================
   Empty States
========================================= */

.no-results {
    text-align: center;

    opacity: 0.6;

    padding: 2rem;
}

/* =========================================
   Responsive
========================================= */

@media (max-width: 750px) {
    .container {
        padding: 1.25rem;
    }

    h1 {
        font-size: 2rem;
    }

    .main-nav {
        gap: 0.75rem;
    }

    .avatar {
        width: 100px;
        height: 100px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}