/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: var(--btn-h, 36px);
    padding: 0 16px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.2s ease;
    /* Browsers do not let <button> inherit color from body (they use the UA
       default, usually black) — plain .btn elements without a colour (e.g. the
       sidebar theme button) always looked black/dark regardless of the theme. */
    color: inherit;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #ffffff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
    opacity: 0.95;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-muted);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

/* Used by the Active/Passive toggles and a few other buttons but was never
   defined: in dark mode they were nearly invisible. */
.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover,
.btn-danger:hover {
    opacity: 0.92;
}

/* Quiet button for the unselected option of a group (e.g. My Phone call
   filters); undefined before, so it showed as a white browser button. */
.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}
.btn-ghost:hover {
    background: var(--bg-input);
    color: var(--text-main);
}

/* Outline buttons (used across the pages but were never defined, so they
   rendered as bare text): coloured border and text, filled on hover. */
.btn-outline-primary   { --btn-c: var(--primary); }
.btn-outline-secondary { --btn-c: var(--text-muted); }
.btn-outline-success   { --btn-c: var(--success); }
.btn-outline-danger    { --btn-c: var(--danger); }
.btn-outline-warning   { --btn-c: var(--warning); }
.btn-outline-info      { --btn-c: var(--info, #0ea5e9); }
.btn-outline-primary, .btn-outline-secondary, .btn-outline-success,
.btn-outline-danger, .btn-outline-warning, .btn-outline-info {
    background: transparent;
    color: var(--btn-c);
    border: 1px solid var(--btn-c);
}
.btn-outline-primary:hover, .btn-outline-secondary:hover, .btn-outline-success:hover,
.btn-outline-danger:hover, .btn-outline-warning:hover, .btn-outline-info:hover {
    background: var(--btn-c);
    color: #fff;
}