/* ============================================================
   components.css — кнопки, карточки, формы, бейджи, уведомления
   ============================================================ */

/* ============================================================
   Кнопки
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        opacity var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
    font-family: inherit;
    line-height: 1;
}

.btn:active {
    transform: translateY(1px);
}

.btn:disabled,
.btn[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

/* Основная кнопка (фиолетовый градиент) */
.btn-primary {
    background: var(--gradient-purple);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.35);
}

.btn-primary:hover {
    background: var(--gradient-purple-h);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
    transform: translateY(-1px);
    color: #fff;
}

/* Вторичная кнопка (контур) */
.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--color-border-hover);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--accent-purple);
    color: var(--text-primary);
}

/* Призрачная кнопка */
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: transparent;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

/* Размеры */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.0625rem;
    border-radius: var(--radius-lg);
}

/* Кнопка во всю ширину */
.btn-block {
    width: 100%;
}

/* Кнопка — состояние загрузки */
.btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn.loading::after {
    content: '';
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin-left: 0.5rem;
}

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

/* ============================================================
   Карточки
   ============================================================ */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-card);
}

/* Карточка с градиентной рамкой (через pseudo-element) */
.card--gradient {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.card--gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    padding: 1px;
    background: var(--gradient-purple);
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

/* Градиентная рамка появляется при наведении */
.card--gradient:hover {
    border-color: transparent;
}

.card--gradient:hover::before {
    opacity: 1;
}

/* Карточка функции (иконка + текст) */
.feature-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(102, 126, 234, 0.12);
    border-radius: var(--radius-md);
    color: var(--accent-purple);
    flex-shrink: 0;
}

.feature-card__title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}

.feature-card__desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    max-width: none;
}

/* ============================================================
   Сетка карточек
   ============================================================ */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.cards-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.cards-grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 900px) {
    .cards-grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .cards-grid--3,
    .cards-grid--2 {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   Бейджи платформ
   ============================================================ */
.platform-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
    align-items: center;
}

.platform-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.875rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.platform-badge svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.platform-badge:hover {
    border-color: var(--accent-purple);
    color: var(--text-primary);
}

/* ============================================================
   Формы и поля ввода
   ============================================================ */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

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

/* ============================================================
   Сообщения (уведомления)
   ============================================================ */
.message {
    display: none;
    padding: 0.875rem 1.125rem;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    margin-top: 0.875rem;
}

.message.show {
    display: block;
}

.message--success {
    background: rgba(76, 175, 125, 0.12);
    border: 1px solid rgba(76, 175, 125, 0.3);
    color: #6de8a8;
}

.message--error {
    background: rgba(224, 82, 82, 0.12);
    border: 1px solid rgba(224, 82, 82, 0.3);
    color: #f08080;
}

.message--info {
    background: rgba(102, 126, 234, 0.12);
    border: 1px solid rgba(102, 126, 234, 0.3);
    color: #9ab3f5;
}

/* ============================================================
   Промокод
   ============================================================ */
.promo-form {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
}

.promo-input {
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    max-width: 220px;
}

/* ============================================================
   Список преимуществ (чекмарки)
   ============================================================ */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.feature-list__item {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.feature-list__item::before {
    content: '';
    width: 18px;
    height: 18px;
    min-width: 18px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Ccircle cx='9' cy='9' r='9' fill='rgba(102,126,234,0.2)'/%3E%3Cpath d='M5 9l3 3 5-5' stroke='%23667eea' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    margin-top: 2px;
    flex-shrink: 0;
}

/* ============================================================
   Тег «Premium» / «Coming soon»
   ============================================================ */
.tag {
    display: inline-block;
    padding: 0.2rem 0.625rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
}

.tag--premium {
    background: var(--gradient-purple);
    color: #fff;
}

.tag--soon {
    background: rgba(245, 166, 35, 0.15);
    border: 1px solid rgba(245, 166, 35, 0.3);
    color: var(--accent-warning);
}

/* ============================================================
   Разделитель «Или»
   ============================================================ */
.divider-or {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-block: 0.75rem;
}

.divider-or::before,
.divider-or::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}