:root {
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --radius: 0.5rem;
    --transition: all 0.3s ease;
    --shadow: 0 0.25rem 0.5rem hsla(0, 0%, 0%, 0.3);
    --shadow-lg: 0 0.5rem 1rem hsla(0, 0%, 0%, 0.5);
    --container: 600px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    font-size: 16px;
}

body {
    min-height: 100vh;
    background: linear-gradient(to right, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    font-family: var(--font);
    color: var(--text-body);
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container);
    width: 100%;
    padding: var(--space-md) var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    opacity: 0;
    animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.card {
    background: var(--card);
    border: 2px solid var(--alpha-20);
    border-radius: var(--radius);
    padding: var(--space-md);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--alpha-40);
    transform: translateY(-0.02rem);
    box-shadow: var(--shadow-lg);
}

header.card {
    background: transparent;
    border: none;
    box-shadow: none;
}

header.card:hover {
    transform: none;
    box-shadow: none;
}

.logo {
    height: 4rem;
    background: url("../images/logo.webp") no-repeat left center;
    background-size: contain;
}

.search {
    display: flex;
    height: 3rem;
    background: var(--surface);
    border: 2px solid var(--alpha-30);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.search:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.03rem var(--primary-light);
}

.search__input {
    flex: 1;
    padding: 0 var(--space-md);
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 1.1rem;
    outline: none;
}

.search__input::placeholder {
    color: var(--text-dim);
}

.btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--text);
    border: none;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.btn:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: scale(1.02);
}

.btn:active {
    transform: scale(0.98);
}

.btn--search {
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
}

.btn__icon {
    width: 1.2rem;
    height: 1.2rem;
    filter: invert(1);
}

.title {
    color: var(--text);
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    white-space: nowrap;
}

.title__icon {
    width: 2rem;
    height: 2rem;
    animation: spin 3s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.subtitle {
    color: var(--text-dim);
    font-size: 1.1rem;
    text-align: center;
    margin-top: var(--space-xs);
}

.pwa-install {
    display: flex;
    justify-content: center;
    margin-top: var(--space-md);
}

.btn--install {
    background: linear-gradient(135deg, var(--success), var(--primary-dark));
    color: hsl(0, 0%, 100%);
    border: none;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
    box-shadow: var(--shadow);
    border: 1px solid hsla(232, 79%, 54%, 0.3);
}

.btn--install:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--success));
    transform: translateY(-0.02rem);
    box-shadow: var(--shadow-lg);
    border-color: hsla(232, 79%, 54%, 0.5);
}

.btn--install:active {
    transform: scale(0.98);
}

.install-icon {
    font-size: 1.2rem;
}

.install-text {
    font-weight: 600;
}

.heading {
    color: var(--text);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.text {
    color: var(--text-dim);
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: var(--space-sm);
}

.text:last-child {
    margin-bottom: 0;
}

.text--highlight {
    color: var(--primary-light);
    font-weight: 600;
    font-size: 1.1rem;
}

.link {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.link:hover {
    color: var(--text);
    text-decoration: underline;
}

.list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.list__title {
    color: var(--text);
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-md);
}

#domain-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: var(--alpha-5);
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--alpha-10), transparent);
    transition: left 0.5s ease;
}

.item:hover {
    background: var(--alpha-10);
    transform: translateY(-0.02rem);
}

.item:hover::before {
    left: 100%;
}

.item__number {
    width: 2rem;
    height: 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 600;
    flex-shrink: 0;
}

.item__text {
    flex: 1;
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.item__action {
    flex-shrink: 0;
}

.steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin: var(--space-sm) 0;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.step__number {
    width: 1.5rem;
    height: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 600;
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.step__content {
    flex: 1;
    color: var(--text-dim);
    font-size: 1rem;
    line-height: 1.5;
}

.float {
    position: fixed;
    right: var(--space-lg);
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.float:hover {
    transform: scale(1.1);
}

.float--service {
    bottom: 4rem;
    filter: drop-shadow(var(--shadow));
}

.float--telegram {
    bottom: 8.5rem;
    filter: drop-shadow(var(--shadow));
}



.modal {
    position: fixed;
    inset: 0;
    background: var(--overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    animation: fadeIn 0.3s ease-out;
}

.modal__content {
    background: linear-gradient(135deg, hsl(240, 15%, 18%), hsl(240, 25%, 11%));
    border: 2px solid var(--alpha-20);
    border-radius: var(--radius);
    padding: var(--space-lg);
    max-width: 28rem;
    width: 90%;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(0.3rem) scale(0.9);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal__close {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    width: 1.5rem;
    height: 1.5rem;
    cursor: pointer;
    opacity: 0.7;
    transition: var(--transition);
    outline: none;
    border: none;
    background: none;
}

.modal__close:hover {
    opacity: 1;
    transform: scale(1.1);
}

.modal__close:focus {
    outline: none;
    opacity: 1;
}

.modal__logo {
    width: 6rem;
    height: auto;
    display: block;
    margin: 0 auto var(--space-md);
}

.modal__text {
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.modal__text:first-of-type {
    font-size: 1.3rem;
}

.modal__text:last-of-type {
    font-size: 1rem;
    font-weight: 400;
    margin-bottom: 0;
}

.modal__url {
    background: var(--alpha-10);
    color: var(--text);
    padding: var(--space-sm);
    border-radius: var(--space-sm);
    font-size: 1rem;
    text-align: center;
    margin: var(--space-sm) 0;
    word-break: break-word;
    min-height: 2.5rem;
    border: 1px solid var(--alpha-20);
    transition: var(--transition);
    line-height: 1.4;
}

.modal__url--clickable {
    cursor: pointer;
    position: relative;
}

.modal__url--clickable::after {
    content: '👆 Click to visit';
    position: absolute;
    bottom: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    color: var(--text-dim);
    white-space: nowrap;
}

.modal__url--clickable:hover {
    background: var(--alpha-20);
    border-color: var(--alpha-40);
}

.modal__url--clickable:hover::after {
    color: var(--text);
}

.success {
    border-color: var(--success);
}

.success .modal__text {
    color: hsl(134, 44%, 87%);
}

.success .modal__url {
    background: hsla(134, 61%, 41%, 0.2);
    border-color: hsla(134, 61%, 41%, 0.4);
}

.error {
    border-color: var(--error);
}

.error .modal__text {
    color: hsl(354, 58%, 91%);
}

.error .modal__url {
    background: hsla(354, 70%, 54%, 0.2);
    border-color: hsla(354, 70%, 54%, 0.4);
}

.error-message {
    background: linear-gradient(135deg, var(--error), hsl(354, 70%, 44%));
    color: var(--text);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius);
    margin-bottom: var(--space-sm);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    box-shadow: var(--shadow);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-0.2rem);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: var(--space-sm);
    }

    .title {
        font-size: 1.3rem;
    }

    .float {
        width: 3.5rem;
        height: 3.5rem;
    }

    .float--service {
        bottom: 3rem;
    }

    .float--telegram {
        bottom: 7rem;
    }
}

*:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.btn:focus,
.item:focus {
    outline-color: var(--primary-light);
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.hidden {
    display: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}