/* =========================================================
   ROOT VARIABLES
========================================================= */
:root {
    --primary-color: #3e1023;
    --primary-dark: #2a0b18;
    --accent-color: #188038;

    --background-color: #f8f2f2;
    --surface-color: #ffffff;

    --text-color: #1f1f1f;
    --text-light: #5f6368;

    --border-color: #d9d9d9;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;

    --transition: all 0.3s ease;

    --max-width: 1200px;
}

/* =========================================================
   RESET
========================================================= */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* =========================================================
   GLOBAL STYLING
========================================================= */
html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;

    background: linear-gradient(to bottom, #f8f2f2, #ffffff);
    color: var(--text-color);

    font-family: "Inter", "Segoe UI", Arial, sans-serif;
    line-height: 1.7;
}

/* =========================================================
   TYPOGRAPHY
========================================================= */
h1,
h2,
h4 {
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.4px;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.9rem, 4vw, 2.6rem);
    margin-bottom: 1rem;
}


p,
li {
    font-size: 1.05rem;
    color: var(--text-color);
}

p {
    margin-bottom: 1.25rem;
}

ul,
ol {
    margin: 1rem 0 1.5rem 2rem;
}

li {
    margin-bottom: 0.7rem;
}

/* =========================================================
   HORIZONTAL RULE
========================================================= */
hr {
    width: 80%;
    max-width: 900px;
    height: 2px;
    margin: 4rem auto;
    border: none;

    background: linear-gradient(
        to right,
        transparent,
        var(--primary-color),
        transparent
    );

    opacity: 0.35;
}

/* =========================================================
   HEADER
========================================================= */
header {
    background: linear-gradient(
        135deg,
        var(--primary-color),
        var(--primary-dark)
    );

    color: white;
    text-align: center;

    padding: 3rem 1.5rem;

    box-shadow: var(--shadow-md);
}

header h1 {
    color: white;
    margin-bottom: 0.5rem;
}

header p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 750px;
    margin: 0 auto;
}

header .logo {
    max-width: 160px;
    margin-bottom: 1rem;
}

/* =========================================================
   NAVIGATION
========================================================= */
nav {
    position: sticky;
    top: 0;
    z-index: 1000;

    background-color: rgba(62, 16, 35, 0.95);
    backdrop-filter: blur(10px);

    box-shadow: var(--shadow-sm);
}

nav ul {
    list-style: none;

    display: flex;
    justify-content: center;
    flex-wrap: wrap;

    max-width: var(--max-width);
    margin: 0 auto;
}

nav ul li {
    position: relative;
}

/* Navigation links */
nav ul li a {
    display: block;

    padding: 1rem 1.25rem;

    color: white;
    text-decoration: none;
    font-weight: 500;

    transition:
        background-color var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast);
}

/* Hover effect */
nav ul li a:hover {
    background-color: white;
    color: var(--primary-color);
    transform: translateY(-1px);
}

/* =========================================================
   DROPDOWN MENU
========================================================= */
nav ul li ul.dropdown {
    position: absolute;
    top: 100%;
    left: 0;

    min-width: 260px;

    background-color: white;

    border-radius: 10px;

    box-shadow: var(--shadow-md);

    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);

    transition:
        opacity var(--transition-normal),
        transform var(--transition-normal),
        visibility var(--transition-normal);
}

/* Dropdown items */
nav ul li ul.dropdown li {
    width: 100%;
}

nav ul li ul.dropdown li a {
    color: var(--text-color);
    padding: 0.9rem 1rem;
    background-color: white;
}

nav ul li ul.dropdown li a:hover {
    background-color: #f4f4f4;
    color: var(--primary-color);
}

/* Show dropdown */
nav ul li:hover ul.dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* =========================================================
   SCROLLABLE DROPDOWN MENU
========================================================= */

.dropdown-scrollbar {
    max-height: 320px;     /* Controls dropdown height */
    overflow-y: auto;      /* Enables vertical scrolling */
    overflow-x: hidden;

    scrollbar-width: thin; /* Firefox */
    scrollbar-color: #888 #f1f1f1;

    scroll-behavior: smooth;
}

/* Chrome, Edge, Safari */
.dropdown-scrollbar::-webkit-scrollbar {
    width: 10px;
}

.dropdown-scrollbar::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.dropdown-scrollbar::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 10px;
    transition: background 0.3s ease;
}

.dropdown-scrollbar::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* =========================================================
   MAIN CONTENT
========================================================= */
main {
    flex: 1;

    width: 100%;
    max-width: var(--max-width);

    margin: 0 auto;
    padding: 3rem 2rem 6rem;
}

section {
    background: var(--surface-color);

    margin-bottom: 2.5rem;
    padding: 2.5rem;

    border-radius: var(--radius-lg);

    box-shadow: var(--shadow-sm);

    transition: transform 0.3s ease,
                box-shadow 0.3s ease;
}

section:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

main h2 {
    position: relative;
    padding-bottom: 0.75rem;
}

main h2::after {
    content: "";

    position: absolute;
    bottom: 0;
    left: 0;

    width: 90px;
    height: 4px;

    border-radius: 999px;

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

/* =========================================================
   CODE BLOCKS
========================================================= */
pre {
    margin: 1.5rem 0;
    padding: 1.5rem;

    overflow-x: auto;

    border-radius: var(--radius-md);

    background: #111827;

    box-shadow: var(--shadow-sm);
}

pre code {
    background: transparent;

    color: #e5e7eb;

    font-size: 0.95rem;
    font-family: "Fira Code", "Courier New", monospace;

    line-height: 1.7;
}

code {
    padding: 0.2rem 0.45rem;

    border-radius: 4px;

    background: #f1f3f4;

    color: var(--accent-color);

    font-family: "Fira Code", "Courier New", monospace;
    font-size: 0.92rem;
}

/* =========================================================
   TABLES
========================================================= */
table {
    width: 100%;
    border-collapse: collapse;

    margin: 2rem 0;

    background: white;

    border-radius: var(--radius-md);

    overflow: hidden;

    box-shadow: var(--shadow-sm);
}

tr {
    border-bottom: 1px solid #eeeeee;
}

tr:hover {
    background-color: #fafafa;
}

th,
td {
    padding: 1rem;
    text-align: left;
}

th {
    background: var(--primary-color);
    color: white;
}

/* =========================================================
   LINKS & BUTTON STYLE
========================================================= */
a {
    color: var(--accent-color);
    transition: var(--transition);
}

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

.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    margin-top: 1rem;
    padding: 0.9rem 1.6rem;

    border-radius: var(--radius-md);

    background: var(--primary-color);
    color: white;

    font-weight: 600;
    text-decoration: none;

    transition: var(--transition);

    box-shadow: var(--shadow-sm);
}

.button-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* =========================================================
   FOOTER
========================================================= */
footer {
    margin-top: auto;

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

    color: rgba(255, 255, 255, 0.85);

    text-align: center;

    padding: 1.5rem;

    box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.08);
}

footer p {
    margin: 0;
    color: rgba(255, 255, 255, 0.85);
}

/* =========================================================
   RESPONSIVE DESIGN
========================================================= */
@media (max-width: 992px) {

    nav ul {
        flex-direction: column;
    }

    nav ul li {
        width: 100%;
    }

    nav ul li a {
        justify-content: flex-start;
        width: 100%;
    }

    nav ul li ul.dropdown {
        position: static;
        width: 100%;
        border-radius: 0;
        box-shadow: none;
    }

    main {
        padding: 2rem 1.25rem 5rem;
    }

    section {
        padding: 2rem;
    }
}

@media (max-width: 768px) {

    header {
        padding: 2.5rem 1rem;
    }

    main {
        padding: 1.5rem 1rem 5rem;
    }

    section {
        padding: 1.5rem;
    }

    h1 {
        font-size: 2.2rem;
    }

    h2 {
        font-size: 1.7rem;
    }

    h3 {
        font-size: 1.35rem;
    }

    p,
    li {
        font-size: 1rem;
    }
}

/* =========================================================
   H3 HEADINGS
========================================================= */

main h3 {
    position: relative;

    text-align: center;

    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: 1px;

    color: var(--primary-color);

    margin: 4rem auto 2rem;

    width: fit-content;

    padding-bottom: 1rem;

    transition: all 0.3s ease;
}

/* Animated underline effect */
main h3::after {
    content: "";

    position: absolute;

    left: 50%;
    bottom: 0;

    transform: translateX(-50%);

    width: 70px;
    height: 4px;

    border-radius: 999px;

    background: linear-gradient(
        90deg,
        var(--primary-color),
        var(--accent-color)
    );

    transition: width 0.3s ease;
}

/* Hover animation */
main h3:hover {
    transform: translateY(-3px);
    text-shadow: 0 4px 12px rgba(62, 16, 35, 0.2);
}

/* Expand underline on hover */
main h3:hover::after {
    width: 120px;
}