:root {
    --bg-color-light: #ffffff;
    --text-color-light: #1d1d1f;
    --secondary-text-color-light: #6e6e73;
    --card-bg-color-light: #f5f5f7;
    --border-color-light: #d2d2d7;
    --accent-color-light: #007aff;
    --code-bg-light: #e8e8ed;
    --green-light: #34c759;
    --purple-light: #af52de;
    --orange-light: #ff9500;
    --red-light: #ff3b30;
    --blue-light: #007aff;

    --bg-color-dark: #000000;
    --text-color-dark: #f5f5f7;
    --secondary-text-color-dark: #a1a1a6;
    --card-bg-color-dark: #1e1e1e;
    --border-color-dark: #3a3a3c;
    --accent-color-dark: #0a84ff;
    --code-bg-dark: #2c2c2e;
    --green-dark: #30d158;
    --purple-dark: #bf5af2;
    --orange-dark: #ff9f0a;
    --red-dark: #ff453a;
    --blue-dark: #0a84ff;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: var(--bg-color-dark);
        --text-color: var(--text-color-dark);
        --secondary-text-color: var(--secondary-text-color-dark);
        --card-bg-color: var(--card-bg-color-dark);
        --border-color: var(--border-color-dark);
        --accent-color: var(--accent-color-dark);
        --code-bg: var(--code-bg-dark);
        --green: var(--green-dark);
        --purple: var(--purple-dark);
        --orange: var(--orange-dark);
        --red: var(--red-dark);
        --blue: var(--blue-dark);
    }
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-color: var(--bg-color-light);
        --text-color: var(--text-color-light);
        --secondary-text-color: var(--secondary-text-color-light);
        --card-bg-color: var(--card-bg-color-light);
        --border-color: var(--border-color-light);
        --accent-color: var(--accent-color-light);
        --code-bg: var(--code-bg-light);
        --green: var(--green-light);
        --purple: var(--purple-light);
        --orange: var(--orange-light);
        --red: var(--red-light);
        --blue: var(--blue-light);
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 3rem 1.5rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    /* Firefox scrollbar styling */
    scrollbar-width: thin;
    scrollbar-color: var(--secondary-text-color) transparent;
}

.container {
    max-width: 860px;
    margin: 0 auto;
    transition: max-width 0.3s ease-in-out;
}

.hero {
    text-align: center;
    padding: 4rem 0;
    margin-bottom: 4rem;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 0.5rem 0; /* Reduced bottom margin */
    letter-spacing: -0.01em;
}

.hero-subtitle {
    position: relative;
    font-size: 5rem;
    font-weight: 700;
    margin: 0 0 2.5rem 0;
    letter-spacing: -0.03em;
    background: linear-gradient(90deg, var(--purple) 0%, var(--blue) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    width: 120%;
    height: 100%;
    background: radial-gradient(ellipse at center, var(--accent-color), transparent 60%);
    filter: blur(60px); /* Slightly reduced blur for more definition */
    opacity: 0.7; /* Increased base opacity for light mode */
}

@media (prefers-color-scheme: dark) {
    .hero-subtitle::before {
        opacity: 0.6; /* Increased for dark mode as well for balance */
    }
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.cta-button {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 9999px;
    transition: transform 0.2s, background-color 0.2s, color 0.2s;
}

.cta-button:hover {
    transform: translateY(-2px);
}

.cta-button.primary {
    background-color: var(--accent-color);
    color: white;
}

.cta-button.secondary {
    background-color: var(--card-bg-color);
    color: var(--accent-color);
    border: 1px solid var(--border-color);
}

#installation-guide {
    padding-top: 2rem;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 3rem;
}

.os-selector {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 3rem;
    background-color: var(--card-bg-color);
    padding: 0.5rem;
    border-radius: 12px;
}

.os-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s, box-shadow 0.3s;
    background-color: transparent;
    color: var(--secondary-text-color);
}

.os-btn.active {
    background-color: var(--bg-color);
    color: var(--text-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

@media (prefers-color-scheme: dark) {
    .os-btn.active {
        background-color: #333;
        box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
}

.os-btn .fab {
    margin-right: 0.5rem;
}

main {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.step {
    margin-bottom: 4rem;
}

.step-title {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 50%;
    color: white;
    font-weight: bold;
    margin-right: 1rem;
    font-size: 1.2rem;
}

.step-1 .step-number { background-color: var(--blue); }
.step-2 .step-number { background-color: var(--green); }
.step-3 .step-number { background-color: var(--purple); }
.step-4 .step-number { background-color: var(--orange); }

.step p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--secondary-text-color);
}

.content-box {
    padding: 1.5rem;
    border-radius: 16px;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.content-box:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: dark) {
    .content-box:hover {
        box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }
}

.box-title {
    display: flex;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0 0 1rem 0;
}
.box-title .fab, .box-title .fas {
    margin-right: 0.75rem;
    font-size: 1.3rem;
}

.box-title .fa-windows { color: var(--blue); }
.box-title .fa-apple { color: #888; }
.box-title .fa-linux, .box-title .fa-ubuntu { color: var(--orange); }
.box-title .fa-download { color: var(--green); }
.box-title .fa-cog { color: var(--purple); }
.box-title .fa-robot { color: var(--green); }
.box-title .fa-code { color: var(--purple); }
.box-title .fa-wrench { color: var(--red); }

@media (prefers-color-scheme: dark) {
    .box-title .fa-apple { color: #aaa; }
}

.method + .method {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.method-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
}

ol, ul {
    padding-left: 1.5rem;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--secondary-text-color);
}

code {
    font-family: "SF Mono", "Fira Code", "Monaco", monospace;
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    border-radius: 6px;
    background-color: var(--code-bg);
    color: var(--text-color);
}

.code-block {
    background-color: #f6f8fa;
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    font-family: "SF Mono", "Fira Code", "Monaco", monospace;
    font-size: 0.9rem;
    margin: 1rem 0;
}

.code-block .comment { color: #6a737d; }
.code-block .command { color: #24292e; }

@media (prefers-color-scheme: dark) {
    .code-block {
        background-color: #1c1c1e;
    }
    .code-block .comment { color: #8b949e; }
    .code-block .command { color: #c9d1d9; }
}

.note {
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    font-size: 0.9rem;
    background-color: #f0f7ff;
    color: #0366d6;
    border: 1px solid #b3d1ff;
}

@media (prefers-color-scheme: dark) {
    .note {
        background-color: #1f2937;
        color: #90b8f0;
        border: 1px solid #384252;
    }
}
.note ul { margin: 0; padding-left: 1.2rem; }

.verification-box {
    border-left: 4px solid var(--green);
    padding: 1rem 1.5rem;
    margin-top: 2rem;
    border-radius: 0 8px 8px 0;
    background-color: #f0fff4;
}

@media (prefers-color-scheme: dark) {
    .verification-box {
        background-color: #1c2e22;
    }
}

.verification-box h6 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: #22863a;
}

@media (prefers-color-scheme: dark) {
    .verification-box h6 { color: var(--green); }
}

details {
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
    background-color: var(--card-bg-color);
}

summary {
    padding: 1rem 1.5rem;
    font-weight: 500;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
summary::-webkit-details-marker { display: none; }
summary::after {
    content: '+';
    font-size: 1.5rem;
    transition: transform 0.2s;
}
details[open] summary::after {
    transform: rotate(45deg);
}

.details-content {
    padding: 0 1.5rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

footer {
    margin-top: 5rem;
    text-align: center;
}

.congrats-banner {
    padding: 2rem;
    border-radius: 16px;
    color: white;
    background: linear-gradient(90deg, #007aff, #af52de);
}

@media (prefers-color-scheme: dark) {
    .congrats-banner {
        background: linear-gradient(90deg, #0a84ff, #bf5af2);
    }
}

.congrats-banner h5 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
}
.congrats-banner p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin: 0 0 1rem 0;
}
.congrats-banner span {
    font-size: 0.9rem;
    opacity: 0.8;
}

@media (max-width: 768px) {
    body {
        padding: 1.5rem 1rem;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-subtitle {
        font-size: 1.2rem;
    }
    .section-title {
        font-size: 2.2rem;
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1100px;
    }
}

@media (min-width: 1400px) {
    .container {
        max-width: 1280px;
    }
    body {
        padding: 3rem 4rem;
    }
}
#advanced-tips {
    padding-top: 2rem;
    margin-top: 4rem;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    background: #000;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

@media (prefers-color-scheme: dark) {
    .video-container {
        box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    }
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.hero-description {
    font-size: 1rem;
    color: var(--secondary-text-color);
    max-width: 450px;
    margin: 0 auto 2rem auto;
    line-height: 1.6;
}
#cli-reference {
    padding-top: 2rem;
    margin-top: 4rem;
}

.section-description {
    text-align: center;
    font-size: 1.1rem;
    color: var(--secondary-text-color);
    max-width: 600px;
    margin: -2rem auto 3rem auto;
}

.table-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.8rem;
}

.table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background-color: var(--card-bg-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

@media (prefers-color-scheme: dark) {
    .table-container {
        box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    }
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

th, td {
    padding: 1rem 1.2rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    line-height: 1.5;
}

thead th {
    font-weight: 600;
    color: var(--text-color);
    background-color: rgba(128, 128, 128, 0.05);
}

tbody tr:last-child td {
    border-bottom: none;
}

tbody td {
    color: var(--secondary-text-color);
}

tbody td:first-child {
    color: var(--text-color);
    font-weight: 500;
}

tbody code {
    font-size: 88%;
}

.tip-box {
    margin-top: 2rem;
    padding: 1.2rem;
    border-radius: 12px;
    background-color: #f0f7ff;
    color: #0366d6;
    border: 1px solid #b3d1ff;
    font-size: 1rem;
}

@media (prefers-color-scheme: dark) {
    .tip-box {
        background-color: #1f2937;
        color: #90b8f0;
        border: 1px solid #384252;
    }
}

/*
 Elegant Scrollbar - Apple Aesthetic
 Inspired by macOS scrollbars for a clean, modern look.
*/
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 9999px;
    border: 2px solid transparent;
    background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--secondary-text-color);
}

/* Floating Action Button Styles */
.fab-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.fab-button {
    width: 56px;
    height: 56px;
    background-color: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.fab-button:hover {
    transform: scale(1.05);
    background-color: var(--blue-dark);
}

.fab-icon {
    font-size: 24px;
    color: white;
    transition: transform 0.3s ease;
}

.fab-menu {
    position: absolute;
    bottom: 70px;
    right: 0;
    list-style: none;
    margin: 0;
    padding: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    background-color: var(--card-bg-color);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    overflow: hidden;
}

.fab-container.active .fab-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.fab-container.active .fab-icon {
    transform: rotate(45deg);
}

.fab-menu-item a {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    text-decoration: none;
    color: var(--text-color);
    transition: background-color 0.2s;
    white-space: nowrap;
}

.fab-menu-item a:hover {
    background-color: var(--border-color);
}

.fab-menu-item i {
    margin-right: 12px;
    font-size: 18px;
    width: 20px;
    text-align: center;
}

/* FAB Initial User Hint */
@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(10px);
        visibility: hidden;
    }
}

.fab-label {
    position: absolute;
    right: 70px;
    bottom: 14px;
    background-color: var(--card-bg-color);
    color: var(--text-color);
    padding: 6px 12px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    white-space: nowrap;
    font-size: 14px;
    font-weight: 500;
    animation: fadeOut 0.5s ease-in-out 4s forwards; /* Starts after 4s, then fades out */
    pointer-events: none; /* Make sure it doesn't block clicks */
}