/* ==================== CSS VARIABLES (DARK THEME) ==================== */
:root {
    /* Colors */
    --background-color: #0D1117;
    --container-color: #161B22;
    --text-color: #C9D1D9;
    --title-color: #FFFFFF;
    --primary-color: #3399FF; /* Яскравий синій */
    --accent-color: #00FF99;  /* Неоновий зелений */
    --border-color: #30363D;

    /* Typography */
    --body-font: 'Inter', sans-serif;
    --title-font: 'Inter', sans-serif;

    --h1-font-size: 3rem;
    --h2-font-size: 2rem;
    --h3-font-size: 1.25rem;
    --normal-font-size: 1rem;
    --small-font-size: 0.875rem;

    /* z-index */
    --z-background: -1;
    --z-header: 100;
    --z-modal: 1000;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    font-size: var(--normal-font-size);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

h1, h2, h3 {
    font-family: var(--title-font);
    color: var(--title-color);
    font-weight: 700;
}

ul {
    list-style: none;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color .3s;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* ==================== REUSABLE CSS CLASSES ==================== */
.container {
    max-width: 1140px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.section {
    padding: 6rem 0;
}

/* ==================== HEADER (REDESIGNED) ==================== */
.header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--z-header);
    background-color: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4.5rem;
}

.header__logo {
    font-size: 1.5rem;
    color: var(--title-color);
    font-weight: 700;
    text-shadow: 0 0 5px var(--primary-color);
}

.header__nav-list {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.header__nav-link {
    color: var(--text-color);
    font-weight: 500;
    transition: color .3s, text-shadow .3s;
}

.header__nav-link:hover {
    color: var(--accent-color);
    text-shadow: 0 0 5px var(--accent-color);
}

.header__nav-link--button {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    color: var(--background-color);
    font-weight: 700;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    transition: transform .3s, box-shadow .3s;
}

.header__nav-link--button:hover {
    color: var(--background-color);
    transform: scale(1.05);
    box-shadow: 0 0 15px var(--accent-color);
}

/* ==================== HERO (REDESIGNED) ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-background);
}

.hero__content {
    position: relative;
    z-index: 1;
}

.hero__title {
    font-size: 4rem; /* Збільшений розмір */
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    text-shadow: 0 0 15px rgba(51, 153, 255, 0.5);
}

.hero__description {
    font-size: 1.25rem;
    max-width: 650px;
    margin: 0 auto 2.5rem;
    color: var(--text-color);
}

.hero__button {
    display: inline-block;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    color: var(--background-color);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: var(--normal-font-size);
    transition: transform .3s, box-shadow .3s;
    border: none;
    cursor: pointer;
}

.hero__button:hover {
    transform: scale(1.05) translateY(-3px);
    box-shadow: 0 0 20px var(--accent-color);
}

/* ==================== FOOTER (REDESIGNED) ==================== */
.footer {
    background-color: var(--container-color);
    border-top: 1px solid var(--border-color);
    padding-top: 4rem;
}

.footer__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    padding-bottom: 3rem;
}

.footer__logo {
    font-size: 1.5rem;
    color: var(--title-color);
    margin-bottom: 1rem;
    display: inline-block;
    font-weight: 700;
}

.footer__title {
    font-size: var(--h3-font-size);
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer__link {
    color: var(--text-color);
}

.footer__address p {
    display: flex;
    align-items: flex-start;
    gap: .5rem;
    margin-bottom: .5rem;
}

.footer__icon {
    flex-shrink: 0;
    margin-top: 4px;
    width: 16px;
    color: var(--accent-color);
}

.footer__copy {
    text-align: center;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-color);
    font-size: var(--small-font-size);
    color: #8B949E; /* GitHub-like gray */
}

/* ==================== SECTION (GENERAL UPDATE) ==================== */
.section {
    border-bottom: 1px solid var(--border-color);
}

.section__header {
    text-align: center;
    margin-bottom: 4rem;
}

.section__title {
    font-size: var(--h2-font-size);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

/* Декоративна лінія під заголовком */
.section__title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--text-color);
    max-width: 600px;
    margin: 1.5rem auto 0;
    opacity: 0.8;
}


/* ==================== PRACTICES (REDESIGNED) ==================== */
.practices {
    background-color: var(--background-color);
}

.practices__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.practices__card {
    background-color: var(--container-color);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.practices__card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: 0 0 25px rgba(0, 255, 153, 0.2); /* Світіння */
}

.practices__card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all .3s ease;
}

.practices__card:hover .practices__card-icon {
    background-color: var(--accent-color);
    color: var(--background-color);
    border-color: var(--accent-color);
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 0 15px var(--accent-color);
}

.practices__card-icon i {
    width: 30px;
    height: 30px;
}

.practices__card-title {
    font-size: var(--h3-font-size);
    font-weight: 700;
    margin-bottom: .75rem;
    color: var(--title-color);
}

.practices__card-description {
    font-size: var(--normal-font-size);
    color: var(--text-color);
    opacity: 0.8;
}

/* ==================== TOOLS (REDESIGNED) ==================== */
.tools {
    background: #0a0e13; /* Трохи інший відтінок фону для виділення */
}

.tools__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 768px) {
    .tools__container {
        grid-template-columns: 300px 1fr;
    }
}

.tools__tabs {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tools__tab-button {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    padding: 1rem;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: var(--normal-font-size);
    font-family: var(--body-font);
    cursor: pointer;
    text-align: left;
    transition: background-color .3s, border-color .3s;
}

.tools__tab-button:hover {
    background-color: var(--container-color);
    border-color: var(--primary-color);
}

.tools__tab-button.active {
    background-color: var(--container-color);
    color: var(--accent-color);
    border-left: 4px solid var(--accent-color);
    border-top-color: var(--border-color);
    border-right-color: var(--border-color);
    border-bottom-color: var(--border-color);
}

.tools__tab-icon {
    width: 24px;
    height: 24px;
}

.tools__content {
    background-color: var(--container-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    min-height: 300px;
}

.tools__content-panel {
    display: none;
    opacity: 0;
    transition: opacity .4s ease-in-out;
}

.tools__content-panel.active {
    display: block;
    opacity: 1;
}

@media (min-width: 992px) {
    .tools__content-panel.active {
        display: grid;
        grid-template-columns: 1fr 200px;
        align-items: center;
        gap: 2rem;
    }
}


.tools__panel-title {
    font-size: 1.5rem;
    color: var(--title-color);
    margin-bottom: 1rem;
}

.tools__panel-description {
    color: var(--text-color);
    opacity: 0.9;
    line-height: 1.7;
}

.tools__panel-image img {
    border-radius: 8px;
    margin-top: 1.5rem;
}

@media (min-width: 992px) {
    .tools__panel-image img {
        margin-top: 0;
    }
}

/* ==================== IDEAS (REDESIGNED) ==================== */
.ideas__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.ideas__card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border-color);
    background-color: var(--container-color);
    transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.ideas__card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: 0 0 25px rgba(0, 255, 153, 0.2);
}

.ideas__card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}

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

.ideas__card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    color: var(--title-color);
    background: linear-gradient(180deg, rgba(13, 17, 23, 0) 0%, rgba(13, 17, 23, 0.8) 50%, rgba(13, 17, 23, 1) 100%);
    transition: all .4s ease;
}

.ideas__card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    transition: transform .3s ease;
}

.ideas__card-description {
    font-size: var(--normal-font-size);
    color: var(--text-color);
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity .4s ease .1s, max-height .4s ease;
}

.ideas__card:hover .ideas__card-title {
    transform: translateY(-5px);
}

.ideas__card:hover .ideas__card-description {
    opacity: 1;
    max-height: 100px; /* Достатньо для кількох рядків */
}

/* ==================== ABOUT (REDESIGNED) ==================== */
.about {
    position: relative;
    overflow: hidden;
}

/* Додаємо фоновий патерн */
.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(to right, var(--border-color) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.1;
    z-index: -1;
}

.about__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 992px) {
    .about__container {
        grid-template-columns: 1fr 1fr;
    }
}

.about__image-wrapper {
    position: relative;
    text-align: center;
}

.about__image {
    border-radius: 12px;
    filter: grayscale(1) contrast(1.1) brightness(0.9);
    max-width: 400px;
    width: 100%;
}

.about__content {
    position: relative;
    padding: 2rem;
    border: 1px solid var(--border-color);
    background: var(--background-color);
}

/* Декоративні кутові рамки */
.about__content::before,
.about__content::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 30px;
    border-color: var(--accent-color);
    border-style: solid;
}

.about__content::before {
    top: -8px;
    left: -8px;
    border-width: 3px 0 0 3px;
}

.about__content::after {
    bottom: -8px;
    right: -8px;
    border-width: 0 3px 3px 0;
}


.about__content .section__title {
    text-align: left;
}

.about__content .section__title::after {
    left: 0;
    transform: translateX(0);
}

.about__description {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    opacity: 0.9;
}
.about__description:last-child {
    margin-bottom: 0;
}
/* ==================== CONTACT (REDESIGNED) ==================== */
.contact {
    background-color: var(--background-color);
    border-bottom: none; /* Остання секція */
}

.contact__form {
    max-width: 700px;
    margin: 0 auto;
    display: grid;
    gap: 1.5rem;
    background-color: var(--container-color);
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.contact__form-group {
    display: flex;
    flex-direction: column;
}

.contact__form-label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: var(--small-font-size);
    color: var(--text-color);
    opacity: 0.8;
}
label[for="captcha"]{
    font-family: monospace;
    color: var(--accent-color);
}

.contact__form-input {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: monospace;
    font-size: var(--normal-font-size);
    background-color: var(--background-color);
    color: var(--text-color);
    transition: border-color .3s, box-shadow .3s;
    caret-color: var(--accent-color);
}

.contact__form-input::placeholder {
    color: #484f58;
}

.contact__form-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(0, 255, 153, 0.3);
}

/* Custom Checkbox */
.contact__form-group--checkbox {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.contact__form-checkbox-input {
    display: none; /* Ховаємо оригінальний чекбокс */
}
.contact__form-checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: var(--small-font-size);
    color: var(--text-color);
}
.contact__form-checkbox-box {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    margin-right: .75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .3s;
}
.contact__form-checkbox-box::after { /* Галочка */
    content: '✓';
    color: var(--accent-color);
    font-weight: bold;
    font-size: 20px;
    opacity: 0;
    transform: scale(0.5);
    transition: all .3s;
}
.contact__form-checkbox-input:checked + .contact__form-checkbox-label .contact__form-checkbox-box {
    border-color: var(--accent-color);
}
.contact__form-checkbox-input:checked + .contact__form-checkbox-label .contact__form-checkbox-box::after {
    opacity: 1;
    transform: scale(1);
}

.contact__form-button {
    width: 100%;
}

.contact__form-message {
    font-size: var(--small-font-size);
    text-align: center;
    padding: 1rem;
    border-radius: 8px;
    display: none;
}

.contact__form-message.success {
    display: block;
    background-color: rgba(0, 255, 153, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}

.contact__form-message.error {
    display: block;
    background-color: rgba(255, 82, 82, 0.1);
    color: #ff5252;
    border: 1px solid #ff5252;
}

/* ==================== COOKIE POP-UP (REDESIGNED) ==================== */
.cookie-popup {
    position: fixed;
    bottom: 1.5rem;
    left: 1.5rem;
    right: 1.5rem;
    max-width: 500px;
    background-color: var(--container-color);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    z-index: var(--z-modal);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .5s, transform .5s;
    pointer-events: none;
}

.cookie-popup.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.cookie-popup__text {
    font-size: var(--small-font-size);
    color: var(--text-color);
}

.cookie-popup__text a {
    text-decoration: underline;
    font-weight: 700;
}

.cookie-popup__button {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    color: var(--background-color);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 700;
    white-space: nowrap;
    transition: transform .3s, box-shadow .3s;
}

.cookie-popup__button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px var(--accent-color);
}


/* ==================== POLICY PAGES (REDESIGNED) ==================== */
/* Ці стилі будуть застосовані до ваших сторінок privacy.html, terms.html і т.д.,
   якщо вони мають структуру <section class="pages">...</section>
*/
.pages {
    padding: 8rem 0 4rem;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

/* Додаємо фоновий патерн, як у секції "About" */
.pages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(to right, var(--border-color) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.05;
    z-index: -1;
}

.pages .container {
    max-width: 800px;
    background: var(--container-color);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 12px;
}

@media (min-width: 768px) {
    .pages .container {
        padding: 3rem;
    }
}

.pages h1 {
    font-size: var(--h1-font-size);
    margin-bottom: 2rem;
    position: relative;
}

.pages h1::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.pages h2 {
    font-size: var(--h2-font-size);
    margin-top: 3rem;
    margin-bottom: 1rem;
    border-left: 3px solid var(--primary-color);
    padding-left: 1rem;
}

.pages p,
.pages ul {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.pages ul {
    list-style-type: none;
}

.pages li {
    margin-bottom: 0.75rem;
    padding-left: 2rem;
    position: relative;
}

/* Стилізований маркер списку */
.pages li::before {
    content: '»';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.pages a {
    text-decoration: underline;
    text-underline-offset: 4px;
    font-weight: 500;
}

.pages a:hover {
    text-decoration: none;
}

.pages strong {
    color: var(--title-color);
    font-weight: 700;
}