/* === FONTS & ROOT VARIABLES === */
@font-face {
    font-family: "Vazirmatn";
    src: local("Vazirmatn"), url("../fonts/Vazirmatn/Vazirmatn-Regular.ttf") format("truetype");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

:root {
    --bs-font-sans-serif: "Vazirmatn", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --bs-body-font-family: var(--bs-font-sans-serif);
    --hue: 223;
    --primary: hsl(var(--hue), 90%, 55%);
    --primaryT: hsla(var(--hue), 90%, 55%, 0);
    --transDur: 0.3s;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* === BASE STYLES === */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--bs-font-sans-serif);
    background-color: #f8f9fa;
    color: var(--bs-body-color);
    transition: background-color 0.3s, color 0.3s;
}

[data-bs-theme="dark"] body {
    background-color: #212529;
    color: #f8f9fa;
}

/* === FLOATING MENU BUTTON === */
.floating-btn {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    position: fixed;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1060;
    border: none;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s;
    top: 20px;
    right: 20px;
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    animation: pulse-glow 2s ease-in-out 5 forwards;
}

.floating-btn:active {
    transform: scale(0.9);
}

/* === THEME & LANGUAGE TOGGLERS === */
.togglers {
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

[data-bs-theme="dark"] .togglers {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.theme {
    display: flex;
    align-items: center;
    -webkit-tap-highlight-color: transparent;
    font-weight: 500;
    transform: scale(0.8);
}

.theme__toggle-wrap {
    margin: 0 0.75em;
    direction: ltr;
    position: relative;
}

.theme__toggle {
    background-color: hsl(48, 90%, 85%);
    border-radius: 25% / 50%;
    box-shadow: 0 0 0 0.125em var(--primaryT);
    padding: 0.25em;
    width: 6em;
    height: 3em;
    -webkit-appearance: none;
    appearance: none;
    transition: background-color var(--transDur) ease-in-out,
        box-shadow 0.15s ease-in-out,
        transform var(--transDur) ease-in-out;
    cursor: pointer;
    display: block;
    position: relative;
}

.theme__toggle:before {
    background-color: hsl(48, 90%, 55%);
    border-radius: 50%;
    content: "";
    width: 2.5em;
    height: 2.5em;
    transition: background-color var(--transDur) ease-in-out,
        transform var(--transDur) ease-in-out;
    display: block;
}

.theme__toggle:focus {
    box-shadow: 0 0 0 0.125em var(--primary);
    outline: transparent;
}

.theme__toggle:checked {
    background-color: hsl(198, 90%, 15%);
}

.theme__toggle:checked:before {
    background-color: hsl(198, 90%, 55%);
    transform: translateX(3em);
}

/* Theme-specific icon styles */
.theme__icon,
.theme__icon-part {
    position: absolute;
    z-index: 1;
}

.theme__icon {
    display: block;
    top: 0.75em;
    left: 0.75em;
    width: 1.5em;
    height: 1.5em;
    pointer-events: none;
}

.theme__icon-part {
    border-radius: 50%;
    box-shadow: 0.4em -0.4em 0 0.5em hsl(0, 0%, 100%) inset;
    top: calc(50% - 0.5em);
    left: calc(50% - 0.5em);
    width: 1em;
    height: 1em;
    transition: box-shadow var(--transDur) ease-in-out,
        opacity var(--transDur) ease-in-out,
        transform var(--transDur) ease-in-out;
    transform: scale(0.5);
}

.theme__icon-part~.theme__icon-part {
    background-color: hsl(0, 0%, 100%);
    border-radius: 0.05em;
    box-shadow: none;
    top: 50%;
    left: calc(50% - 0.05em);
    transform: rotate(0deg) translateY(0.5em);
    transform-origin: 50% 0;
    width: 0.1em;
    height: 0.2em;
}

.theme__icon-part:nth-child(3) {
    transform: rotate(45deg) translateY(0.5em);
}

.theme__icon-part:nth-child(4) {
    transform: rotate(90deg) translateY(0.5em);
}

.theme__icon-part:nth-child(5) {
    transform: rotate(135deg) translateY(0.5em);
}

.theme__icon-part:nth-child(6) {
    transform: rotate(180deg) translateY(0.5em);
}

.theme__icon-part:nth-child(7) {
    transform: rotate(225deg) translateY(0.5em);
}

.theme__icon-part:nth-child(8) {
    transform: rotate(270deg) translateY(0.5em);
}

.theme__icon-part:nth-child(9) {
    transform: rotate(315deg) translateY(0.5em);
}

.theme__toggle:checked~.theme__icon {
    transform: translateX(3em);
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(1) {
    box-shadow: 0.2em -0.2em 0 0.2em hsl(0, 0%, 100%) inset;
    transform: scale(1);
}

.theme__toggle:checked~.theme__icon .theme__icon-part~.theme__icon-part {
    opacity: 0;
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(2) {
    transform: rotate(45deg) translateY(0.8em);
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(3) {
    transform: rotate(90deg) translateY(0.8em);
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(4) {
    transform: rotate(135deg) translateY(0.8em);
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(5) {
    transform: rotate(180deg) translateY(0.8em);
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(6) {
    transform: rotate(225deg) translateY(0.8em);
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(7) {
    transform: rotate(270deg) translateY(0.8em);
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(8) {
    transform: rotate(315deg) translateY(0.8em);
}

.theme__toggle:checked~.theme__icon .theme__icon-part:nth-child(9) {
    transform: rotate(360deg) translateY(0.8em);
}

/* === ANIMATIONS === */
@keyframes pulse-glow {
    0% {
        transform: scale(1);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    50% {
        transform: scale(1.15);
        box-shadow: 0 0 20px var(--accent-color);
    }

    100% {
        transform: scale(1);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }
}

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

    .floating-btn {
        animation: none;
        transition: none;
    }
}

/* === RESPONSIVE STYLES === */
@media (max-width: 768px) {
    .floating-btn {
        width: 60px;
        height: 60px;
        top: 15px;
        right: 15px;
    }

    .nav-link-custom {
        min-height: 44px;
        padding: 12px 20px;
    }
}

/* === SIDEBAR NAVIGATION === */
.nav-link-custom {
    font-size: 1.25rem;
    padding: 12px 0;
    color: var(--bs-body-color);
    text-decoration: none;
    display: block;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: color 0.2s, padding-inline-start 0.2s;
}

[data-bs-theme="dark"] .nav-link-custom {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-link-custom:hover {
    color: var(--accent-color);
    padding-inline-start: 10px;
}

/* === FOOTER === */
footer {
    background: #212529;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

footer p {
    margin: 0;
    font-size: 0.9rem;
    color: #888;
}