/* ==========================================================================
   Buttons (v6) · one base, a few roles. Legacy class names are kept as aliases.
   ========================================================================== */
.btn, .submit-btn, .action-btn, .btn-contact, .btn-submit, .google-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
    font-family: var(--body); font-weight: 600; font-size: .95rem; line-height: 1;
    border-radius: 11px; padding: .8rem 1.15rem; cursor: pointer; white-space: nowrap; text-decoration: none;
    border: 1px solid transparent; background: var(--bg-soft); color: var(--ink);
    transition: background .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease), box-shadow .18s var(--ease), color .18s var(--ease);
}
.btn svg { width: 16px; height: 16px; flex: 0 0 auto; }
.btn:hover { background: var(--bg-soft-2); }

/* Primary: brand gradient */
.btn-primary, .btn-create, .btn-sign-up, .submit-btn, .btn-publish, .btn-play, .btn-play-empty, .btn-submit, .btn-contact, .btn-login, .btn-signup, .mp-create-btn {
    background: var(--grad-brand); color: #fff; box-shadow: 0 8px 20px -10px rgba(47, 85, 255, .7);
}
.btn-primary:hover, .btn-create:hover, .btn-sign-up:hover, .submit-btn:hover:not(:disabled), .btn-publish:hover, .btn-play:hover, .btn-play-empty:hover, .btn-submit:hover, .btn-contact:hover, .btn-login:hover, .btn-signup:hover, .mp-create-btn:hover {
    background: var(--grad-brand); transform: translateY(-1px); box-shadow: 0 12px 26px -10px rgba(47, 85, 255, .8); color: #fff;
}

/* Secondary: white with hairline */
.btn-secondary, .btn-sign-in, .btn-refresh, .btn-fullscreen, .btn-nav, .btn-cancel, .btn-load-more, .btn-feature, .google-btn {
    background: #fff; color: var(--ink); border-color: var(--line-2);
}
.btn-secondary:hover, .btn-sign-in:hover, .btn-refresh:hover, .btn-fullscreen:hover, .btn-nav:hover, .btn-cancel:hover, .btn-load-more:hover, .btn-feature:hover, .google-btn:hover {
    background: var(--bg-soft); border-color: var(--ink-3);
}

/* Quiet: text only */
.btn-text, .btn-text-link, .btn-ghost, .btn-continue-guest { background: transparent; color: var(--ink-2); padding: .6rem .8rem; }
.btn-text:hover, .btn-text-link:hover, .btn-ghost:hover, .btn-continue-guest:hover { background: var(--bg-soft); color: var(--ink); }

/* Danger */
.btn-danger, .btn-delete { background: var(--rose); color: var(--coral-ink); }
.btn-danger:hover, .btn-delete:hover { background: #FFDCDC; }

/* Sizes */
.btn-sm { padding: .55rem .8rem; font-size: .85rem; border-radius: 9px; }
.btn-large, .btn-lg { padding: 1rem 1.4rem; font-size: 1rem; border-radius: 12px; }
.btn-block, .submit-btn, .google-btn { width: 100%; }
.submit-btn { margin-top: .5rem; }
.google-btn { margin-bottom: 1.25rem; }
.google-icon { width: 20px; height: 20px; }

/* Icon-only */
.btn-icon, .action-btn-mini, .btn-remove, .modal-close-btn, .btn-close, .close-panel-btn {
    display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 9px;
    background: transparent; color: var(--ink-2); border: 1px solid transparent; cursor: pointer; transition: background .15s var(--ease), color .15s var(--ease);
}
.btn-icon:hover, .action-btn-mini:hover, .btn-remove:hover, .modal-close-btn:hover, .btn-close:hover, .close-panel-btn:hover { background: var(--bg-soft); color: var(--ink); }
.btn-icon svg { width: 18px; height: 18px; }

/* States */
.btn:disabled, .submit-btn:disabled, .btn-publish:disabled, .action-btn:disabled, .btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-spinner { width: 16px; height: 16px; border: 2px solid rgba(255, 255, 255, .45); border-top-color: #fff; border-radius: 50%; animation: spin .8s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 768px) {
    .btn { padding: .75rem 1rem; font-size: .92rem; }
}